Add option to reset custom manga info (#1118)

* Add option to reset custom manga info

* Remove extra line

* Update app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryScreenModel.kt

---------

Co-authored-by: jobobby04 <jobobby04@users.noreply.github.com>

.github/workflows/build_check.yml

@@ -36,7 +36,7 @@ jobs:
         uses: gradle/actions/setup-gradle@v3
 
       - name: Build app
-        run: ./gradlew assembleDevDebug
+        run: ./gradlew detekt assembleDevDebug
 
       - name: Upload APK
         uses: actions/upload-artifact@v3

.github/workflows/build_push.yml

@@ -40,10 +40,17 @@ jobs:
           path: app/google-services.json
           contents: ${{ secrets.GOOGLE_SERVICES_TEXT }}
           write-mode: overwrite
+
+      - name: Write client_secrets.json
+        uses: DamianReeves/write-file-action@v1.2
+        with:
+          path: app/src/main/assets/client_secrets.json
+          contents: ${{ secrets.CLIENT_SECRETS_TEXT }}
+          write-mode: overwrite
       # SY -->
 
       - name: Build app and run unit tests
-        run: ./gradlew assembleStandardRelease testStandardReleaseUnitTest --stacktrace
+        run: ./gradlew detekt assembleStandardRelease testStandardReleaseUnitTest --stacktrace
 
       - name: Sign APK
         uses: r0adkll/sign-android-release@v1

.github/workflows/build_push_preview.yml

@@ -18,13 +18,10 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@v1
 
-      - name: TAG - Bump version and push tag
+      - name: Create Tag
-        uses: anothrNick/github-tag-action@1.67.0
+        run: |
-        env:
+          git tag "preview-${{ github.run_number }}"
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          git push origin "preview-${{ github.run_number }}"
-          WITH_V: true
-          RELEASE_BRANCHES: master
-          DEFAULT_BUMP: patch
 
       - name: PING - Dispatch initiating repository event
         run: |

.gitignore

@@ -22,3 +22,4 @@ TODO.md
 CHANGELOG.md
 /captures
 build.sh
+/app/src/main/assets/client_secrets.json

CONTRIBUTING.md

@@ -52,3 +52,20 @@ When creating a fork, remember to:
 - To avoid having your data polluting the main app's analytics and crash report services:
     - If you want to use Firebase analytics, replace [`google-services.json`](https://github.com/tachiyomiorg/tachiyomi/blob/master/app/src/standard/google-services.json) with your own
     - If you want to use ACRA crash reporting, replace the `ACRA_URI` endpoint in [`build.gradle.kts`](https://github.com/tachiyomiorg/tachiyomi/blob/master/app/build.gradle.kts) with your own
+
+
+### Supporting Cloud Sync - Google Drive Implementation
+1. Go to [Google Cloud Console](https://console.cloud.google.com)
+2. Create a new project
+3. Go to API & Services -> Library -> Google Drive API and click enable
+4. Go to API & Services -> Oauth consent screen
+5. Create it, fill in the app name, user support email, and developer contact information
+6. In the next screen, click add or remove scopes, and add the `.../auth/drive.appdata` and `.../auth/drive.file` scopes
+7. Don't add any test users and go back to the dashboard
+8. Click publish
+9. Go to API & Services -> Credentials
+10. Click Create credentials -> Oauth client ID
+11. Select Android, give it a name, and set eu.kanade.google.oauth as the package name
+12. To get the SHA-1 key, run `keytool -printcert -jarfile app-standard-universal-release.apk` on your apk, and copy the listed SHA-1
+13. Expand advanced settings, and enable Custom URL scheme
+14. After that just download the json, name it to `client_secrets.json` and put it in `app/src/main/assets/`

README.md

@@ -1,16 +1,16 @@
-| Preview Builds | Release Builds | Tachiyomi Support Server |
+| Preview Builds | Release Builds | Mihon Support Server |
 |-------|----------|----------|
 | [![Preview](https://github.com/jobobby04/TachiyomiSYPreview/workflows/Remote%20Dispatch%20Build%20App/badge.svg)](https://github.com/jobobby04/TachiyomiSYPreview/releases) | [![stable release](https://img.shields.io/github/release/jobobby04/tachiyomisy.svg?maxAge=3600&label=download)](https://github.com/jobobby04/tachiyomisy/releases/latest) | [![Discord](https://img.shields.io/discord/1195734228319617024.svg?label=discord&labelColor=7289da&color=2c2f33&style=flat)](https://discord.gg/mihon) |
 
 
 # ![app icon](./.github/readme-images/app-icon.png)TachiyomiSY
-Tachiyomi is a free and open source manga reader for Android 6.0 and above. This version of Tachiyomi, TachiyomiSY was based off TachiyomiAZ. This version is meant to push forward in the ways of usability and features. TachiyomiSY tries to push forward where it can, but staying in a place where it can easily grab updates and features from the main app, it tries to make new features, or take features from other forks like J2K and Neko.
+Mihon is a free and open source manga reader for Android 6.0 and above. This version of Mihon, TachiyomiSY was based off TachiyomiAZ. This version is meant to push forward in the ways of usability and features. TachiyomiSY tries to push forward where it can, but staying in a place where it can easily grab updates and features from the main app, it tries to make new features, or take features from other forks like J2K and Neko.
 
 ![screenshots of app](./.github/readme-images/screens.png)
 
 ## Features
 
-Features of Tachiyomi(original) include:
+Features of Mihon(original) include:
 * Online reading from a variety of sources
 * Local reading of downloaded content
 * A configurable reader with multiple viewers, reading directions and other settings.
@@ -42,7 +42,6 @@ Features of TachiyomiSY include:
 * Page preload customization
 * Customize image cache size
 * Batch import of custom sources and featured extensions
-* Automatic CAPTCHA solving
 * Advanced source settings page, searching, enable/disable all
 * Click tag for local search, long click tag for global search
 * Merge multiple of the same manga from different sources

app/build.gradle.kts

@@ -26,7 +26,7 @@ android {
     defaultConfig {
         applicationId = "eu.kanade.tachiyomi.sy"
 
-        versionCode = 65
+        versionCode = 66
         versionName = "1.10.5"
 
         buildConfigField("String", "COMMIT_COUNT", "\"${getCommitCount()}\"")
@@ -215,7 +215,7 @@ dependencies {
     // Disk
     implementation(libs.disklrucache)
     implementation(libs.unifile)
-    implementation(libs.junrar)
+    implementation(libs.bundles.archive)
     // SY -->
     implementation(libs.zip4j)
     // SY <--
@@ -248,6 +248,9 @@ dependencies {
     implementation(libs.compose.materialmotion)
     implementation(libs.swipe)
 
+    implementation(libs.google.api.services.drive)
+    implementation(libs.google.api.client.oauth)
+
     // Logging
     implementation(libs.logcat)
 

app/proguard-rules.pro

@@ -122,10 +122,19 @@
 # XmlUtil
 -keep public enum nl.adaptivity.xmlutil.EventType { *; }
 
+# Apache Commons Compress
+-keep class * extends org.apache.commons.compress.archivers.zip.ZipExtraField { <init>(); }
+
 # Firebase
 -keep class com.google.firebase.installations.** { *; }
 -keep interface com.google.firebase.installations.** { *; }
 
+# Google Drive
+-keep class com.google.api.services.** { *; }
+
+# Google OAuth
+-keep class com.google.api.client.** { *; }
+
 # SY -->
 # SqlCipher
 -keepclassmembers class net.zetetic.database.sqlcipher.SQLiteCustomFunction { *; }
@@ -260,6 +269,9 @@
  -keep,allowoptimization class * extends uy.kohesive.injekt.api.TypeReference
  -keep,allowoptimization public class io.requery.android.database.sqlite.SQLiteConnection { *; }
 
+ # Keep apache http client
+ -keep class org.apache.http.** { *; }
+
 # Suggested rules
 -dontwarn com.oracle.svm.core.annotate.AutomaticFeature
 -dontwarn com.oracle.svm.core.annotate.Delete
@@ -273,3 +285,15 @@
 -dontwarn java.lang.Module
 -dontwarn org.graalvm.nativeimage.hosted.RuntimeResourceAccess
 -dontwarn org.jspecify.annotations.NullMarked
+-dontwarn javax.naming.InvalidNameException
+-dontwarn javax.naming.NamingException
+-dontwarn javax.naming.directory.Attribute
+-dontwarn javax.naming.directory.Attributes
+-dontwarn javax.naming.ldap.LdapName
+-dontwarn javax.naming.ldap.Rdn
+-dontwarn org.ietf.jgss.GSSContext
+-dontwarn org.ietf.jgss.GSSCredential
+-dontwarn org.ietf.jgss.GSSException
+-dontwarn org.ietf.jgss.GSSManager
+-dontwarn org.ietf.jgss.GSSName
+-dontwarn org.ietf.jgss.Oid

app/src/main/AndroidManifest.xml

@@ -188,6 +188,20 @@
                 <data android:host="shikimori-auth" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ui.setting.track.GoogleDriveLoginActivity"
+            android:label="GoogleDrive"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:scheme="eu.kanade.google.oauth" />
+            </intent-filter>
+        </activity>
 
         <activity
             android:name="exh.ui.login.EhLoginActivity"

app/src/main/java/eu/kanade/domain/chapter/model/Chapter.kt

@@ -39,4 +39,5 @@ fun Chapter.toDbChapter(): DbChapter = ChapterImpl().also {
     it.date_upload = dateUpload
     it.chapter_number = chapterNumber.toFloat()
     it.source_order = sourceOrder.toInt()
+    it.last_modified = lastModifiedAt
 }

app/src/main/java/eu/kanade/domain/sync/SyncPreferences.kt

@@ -0,0 +1,89 @@
+package eu.kanade.domain.sync
+
+import eu.kanade.domain.sync.models.SyncSettings
+import eu.kanade.tachiyomi.data.sync.models.SyncTriggerOptions
+import tachiyomi.core.common.preference.Preference
+import tachiyomi.core.common.preference.PreferenceStore
+import java.util.UUID
+
+class SyncPreferences(
+    private val preferenceStore: PreferenceStore,
+) {
+    fun clientHost() = preferenceStore.getString("sync_client_host", "https://sync.tachiyomi.org")
+    fun clientAPIKey() = preferenceStore.getString("sync_client_api_key", "")
+    fun lastSyncTimestamp() = preferenceStore.getLong(Preference.appStateKey("last_sync_timestamp"), 0L)
+
+    fun syncInterval() = preferenceStore.getInt("sync_interval", 0)
+    fun syncService() = preferenceStore.getInt("sync_service", 0)
+
+    fun googleDriveAccessToken() = preferenceStore.getString(
+        Preference.appStateKey("google_drive_access_token"),
+        "",
+    )
+
+    fun googleDriveRefreshToken() = preferenceStore.getString(
+        Preference.appStateKey("google_drive_refresh_token"),
+        "",
+    )
+
+    fun uniqueDeviceID(): String {
+        val uniqueIDPreference = preferenceStore.getString("unique_device_id", "")
+
+        // Retrieve the current value of the preference
+        var uniqueID = uniqueIDPreference.get()
+        if (uniqueID.isBlank()) {
+            uniqueID = UUID.randomUUID().toString()
+            uniqueIDPreference.set(uniqueID)
+        }
+
+        return uniqueID
+    }
+
+    fun isSyncEnabled(): Boolean {
+        return syncService().get() != 0
+    }
+
+    fun getSyncSettings(): SyncSettings {
+        return SyncSettings(
+            libraryEntries = preferenceStore.getBoolean("library_entries", true).get(),
+            categories = preferenceStore.getBoolean("categories", true).get(),
+            chapters = preferenceStore.getBoolean("chapters", true).get(),
+            tracking = preferenceStore.getBoolean("tracking", true).get(),
+            history = preferenceStore.getBoolean("history", true).get(),
+            appSettings = preferenceStore.getBoolean("appSettings", true).get(),
+            sourceSettings = preferenceStore.getBoolean("sourceSettings", true).get(),
+            privateSettings = preferenceStore.getBoolean("privateSettings", true).get(),
+        )
+    }
+
+    fun setSyncSettings(syncSettings: SyncSettings) {
+        preferenceStore.getBoolean("library_entries", true).set(syncSettings.libraryEntries)
+        preferenceStore.getBoolean("categories", true).set(syncSettings.categories)
+        preferenceStore.getBoolean("chapters", true).set(syncSettings.chapters)
+        preferenceStore.getBoolean("tracking", true).set(syncSettings.tracking)
+        preferenceStore.getBoolean("history", true).set(syncSettings.history)
+        preferenceStore.getBoolean("appSettings", true).set(syncSettings.appSettings)
+        preferenceStore.getBoolean("sourceSettings", true).set(syncSettings.sourceSettings)
+        preferenceStore.getBoolean("privateSettings", true).set(syncSettings.privateSettings)
+    }
+
+    fun getSyncTriggerOptions(): SyncTriggerOptions {
+        return SyncTriggerOptions(
+            syncOnChapterRead = preferenceStore.getBoolean("sync_on_chapter_read", false).get(),
+            syncOnChapterOpen = preferenceStore.getBoolean("sync_on_chapter_open", false).get(),
+            syncOnAppStart = preferenceStore.getBoolean("sync_on_app_start", false).get(),
+            syncOnAppResume = preferenceStore.getBoolean("sync_on_app_resume", false).get(),
+        )
+    }
+
+    fun setSyncTriggerOptions(syncTriggerOptions: SyncTriggerOptions) {
+        preferenceStore.getBoolean("sync_on_chapter_read", false)
+            .set(syncTriggerOptions.syncOnChapterRead)
+        preferenceStore.getBoolean("sync_on_chapter_open", false)
+            .set(syncTriggerOptions.syncOnChapterOpen)
+        preferenceStore.getBoolean("sync_on_app_start", false)
+            .set(syncTriggerOptions.syncOnAppStart)
+        preferenceStore.getBoolean("sync_on_app_resume", false)
+            .set(syncTriggerOptions.syncOnAppResume)
+    }
+}

app/src/main/java/eu/kanade/domain/sync/models/SyncSettings.kt

@@ -0,0 +1,12 @@
+package eu.kanade.domain.sync.models
+
+data class SyncSettings(
+    val libraryEntries: Boolean = true,
+    val categories: Boolean = true,
+    val chapters: Boolean = true,
+    val tracking: Boolean = true,
+    val history: Boolean = true,
+    val appSettings: Boolean = true,
+    val sourceSettings: Boolean = true,
+    val privateSettings: Boolean = false,
+)

app/src/main/java/eu/kanade/presentation/library/components/LibraryToolbar.kt

@@ -38,6 +38,7 @@ fun LibraryToolbar(
     onClickRefresh: () -> Unit,
     onClickGlobalUpdate: () -> Unit,
     onClickOpenRandomManga: () -> Unit,
+    onClickSyncNow: () -> Unit,
     // SY -->
     onClickSyncExh: (() -> Unit)?,
     // SY <--
@@ -60,6 +61,7 @@ fun LibraryToolbar(
         onClickRefresh = onClickRefresh,
         onClickGlobalUpdate = onClickGlobalUpdate,
         onClickOpenRandomManga = onClickOpenRandomManga,
+        onClickSyncNow = onClickSyncNow,
         // SY -->
         onClickSyncExh = onClickSyncExh,
         // SY <--
@@ -77,6 +79,7 @@ private fun LibraryRegularToolbar(
     onClickRefresh: () -> Unit,
     onClickGlobalUpdate: () -> Unit,
     onClickOpenRandomManga: () -> Unit,
+    onClickSyncNow: () -> Unit,
     // SY -->
     onClickSyncExh: (() -> Unit)?,
     // SY <--
@@ -125,7 +128,10 @@ private fun LibraryRegularToolbar(
                         title = stringResource(MR.strings.action_open_random_manga),
                         onClick = onClickOpenRandomManga,
                     ),
-
+                    AppBar.OverflowAction(
+                        title = stringResource(MR.strings.sync_library),
+                        onClick = onClickSyncNow,
+                    ),
                 ).builder().apply {
                     // SY -->
                     if (onClickSyncExh != null) {

app/src/main/java/eu/kanade/presentation/manga/components/ChapterDownloadIndicator.kt

@@ -24,6 +24,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.StrokeCap
 import androidx.compose.ui.hapticfeedback.HapticFeedback
 import androidx.compose.ui.hapticfeedback.HapticFeedbackType
 import androidx.compose.ui.platform.LocalHapticFeedback
@@ -85,13 +86,12 @@ private fun NotDownloadedIndicator(
     modifier: Modifier = Modifier,
     onClick: (ChapterDownloadAction) -> Unit,
 ) {
-    val hapticFeedback = LocalHapticFeedback.current
     Box(
         modifier = modifier
             .size(IconButtonTokens.StateLayerSize)
             .commonClickable(
                 enabled = enabled,
-                hapticFeedback = hapticFeedback,
+                hapticFeedback = LocalHapticFeedback.current,
                 onLongClick = { onClick(ChapterDownloadAction.START_NOW) },
                 onClick = { onClick(ChapterDownloadAction.START) },
             )
@@ -115,14 +115,13 @@ private fun DownloadingIndicator(
     onClick: (ChapterDownloadAction) -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    val hapticFeedback = LocalHapticFeedback.current
     var isMenuExpanded by remember { mutableStateOf(false) }
     Box(
         modifier = modifier
             .size(IconButtonTokens.StateLayerSize)
             .commonClickable(
                 enabled = enabled,
-                hapticFeedback = hapticFeedback,
+                hapticFeedback = LocalHapticFeedback.current,
                 onLongClick = { onClick(ChapterDownloadAction.CANCEL) },
                 onClick = { isMenuExpanded = true },
             ),
@@ -139,6 +138,8 @@ private fun DownloadingIndicator(
                 modifier = IndicatorModifier,
                 color = strokeColor,
                 strokeWidth = IndicatorStrokeWidth,
+                trackColor = Color.Transparent,
+                strokeCap = StrokeCap.Butt,
             )
         } else {
             val animatedProgress by animateFloatAsState(
@@ -155,6 +156,9 @@ private fun DownloadingIndicator(
                 modifier = IndicatorModifier,
                 color = strokeColor,
                 strokeWidth = IndicatorSize / 2,
+                trackColor = Color.Transparent,
+                strokeCap = StrokeCap.Butt,
+                gapSize = 0.dp,
             )
         }
         DropdownMenu(expanded = isMenuExpanded, onDismissRequest = { isMenuExpanded = false }) {
@@ -188,14 +192,13 @@ private fun DownloadedIndicator(
     modifier: Modifier = Modifier,
     onClick: (ChapterDownloadAction) -> Unit,
 ) {
-    val hapticFeedback = LocalHapticFeedback.current
     var isMenuExpanded by remember { mutableStateOf(false) }
     Box(
         modifier = modifier
             .size(IconButtonTokens.StateLayerSize)
             .commonClickable(
                 enabled = enabled,
-                hapticFeedback = hapticFeedback,
+                hapticFeedback = LocalHapticFeedback.current,
                 onLongClick = { isMenuExpanded = true },
                 onClick = { isMenuExpanded = true },
             ),
@@ -225,13 +228,12 @@ private fun ErrorIndicator(
     modifier: Modifier = Modifier,
     onClick: (ChapterDownloadAction) -> Unit,
 ) {
-    val hapticFeedback = LocalHapticFeedback.current
     Box(
         modifier = modifier
             .size(IconButtonTokens.StateLayerSize)
             .commonClickable(
                 enabled = enabled,
-                hapticFeedback = hapticFeedback,
+                hapticFeedback = LocalHapticFeedback.current,
                 onLongClick = { onClick(ChapterDownloadAction.START) },
                 onClick = { onClick(ChapterDownloadAction.START) },
             ),

app/src/main/java/eu/kanade/presentation/manga/components/MangaBottomActionMenu.kt

@@ -239,6 +239,7 @@ fun LibraryBottomActionMenu(
     onClickCleanTitles: (() -> Unit)?,
     onClickMigrate: (() -> Unit)?,
     onClickAddToMangaDex: (() -> Unit)?,
+    onClickResetInfo: (() -> Unit)?,
     // SY <--
     modifier: Modifier = Modifier,
 ) {
@@ -267,7 +268,7 @@ fun LibraryBottomActionMenu(
                 }
             }
             // SY -->
-            val showOverflow = onClickCleanTitles != null || onClickAddToMangaDex != null
+            val showOverflow = onClickCleanTitles != null || onClickAddToMangaDex != null || onClickResetInfo != null
             val configuration = LocalConfiguration.current
             val moveMarkPrev = remember { !configuration.isTabletUi() }
             var overFlowOpen by remember { mutableStateOf(false) }
@@ -364,6 +365,12 @@ fun LibraryBottomActionMenu(
                                 onClick = onClickAddToMangaDex,
                             )
                         }
+                        if (onClickResetInfo != null) {
+                            DropdownMenuItem(
+                                text = { Text(text = stringResource(SYMR.strings.reset_info)) },
+                                onClick = onClickResetInfo,
+                            )
+                        }
                     }
                 } else {
                     Button(

app/src/main/java/eu/kanade/presentation/manga/components/MangaChapterListItem.kt

@@ -30,13 +30,13 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.clipToBounds
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import eu.kanade.tachiyomi.data.download.model.Download
 import me.saket.swipe.SwipeableActionsBox
 import tachiyomi.domain.library.service.LibraryPreferences
@@ -143,13 +143,8 @@ fun MangaChapterListItem(
                     )
                 }
 
-                Row {
+                Row(modifier = Modifier.alpha(textSubtitleAlpha)) {
-                    ProvideTextStyle(
+                    ProvideTextStyle(value = MaterialTheme.typography.bodySmall) {
-                        value = MaterialTheme.typography.bodyMedium.copy(
-                            fontSize = 12.sp,
-                            color = LocalContentColor.current.copy(alpha = textSubtitleAlpha),
-                        ),
-                    ) {
                         if (date != null) {
                             Text(
                                 text = date,

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsAdvancedScreen.kt

@@ -60,7 +60,6 @@ import eu.kanade.tachiyomi.util.CrashLogUtil
 import eu.kanade.tachiyomi.util.storage.DiskUtil
 import eu.kanade.tachiyomi.util.system.isDevFlavor
 import eu.kanade.tachiyomi.util.system.isPreviewBuildType
-import eu.kanade.tachiyomi.util.system.isReleaseBuildType
 import eu.kanade.tachiyomi.util.system.isShizukuInstalled
 import eu.kanade.tachiyomi.util.system.powerManager
 import eu.kanade.tachiyomi.util.system.setDefaultSettings

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsDataScreen.kt

@@ -15,16 +15,19 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.outlined.HelpOutline
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MultiChoiceSegmentedButtonRow
 import androidx.compose.material3.SegmentedButton
 import androidx.compose.material3.SegmentedButtonDefaults
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.ReadOnlyComposable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
@@ -35,10 +38,13 @@ import androidx.core.net.toUri
 import cafe.adriel.voyager.navigator.LocalNavigator
 import cafe.adriel.voyager.navigator.currentOrThrow
 import com.hippo.unifile.UniFile
+import eu.kanade.domain.sync.SyncPreferences
 import eu.kanade.presentation.more.settings.Preference
 import eu.kanade.presentation.more.settings.screen.data.CreateBackupScreen
 import eu.kanade.presentation.more.settings.screen.data.RestoreBackupScreen
 import eu.kanade.presentation.more.settings.screen.data.StorageInfo
+import eu.kanade.presentation.more.settings.screen.data.SyncSettingsSelector
+import eu.kanade.presentation.more.settings.screen.data.SyncTriggerOptionsScreen
 import eu.kanade.presentation.more.settings.widget.BasePreferenceWidget
 import eu.kanade.presentation.more.settings.widget.PrefsHorizontalPadding
 import eu.kanade.presentation.util.relativeTimeSpanString
@@ -46,10 +52,15 @@ import eu.kanade.tachiyomi.data.backup.create.BackupCreateJob
 import eu.kanade.tachiyomi.data.backup.restore.BackupRestoreJob
 import eu.kanade.tachiyomi.data.cache.ChapterCache
 import eu.kanade.tachiyomi.data.cache.PagePreviewCache
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
+import eu.kanade.tachiyomi.data.sync.SyncManager
+import eu.kanade.tachiyomi.data.sync.service.GoogleDriveService
+import eu.kanade.tachiyomi.data.sync.service.GoogleDriveSyncService
 import eu.kanade.tachiyomi.util.system.DeviceUtil
 import eu.kanade.tachiyomi.util.system.toast
 import kotlinx.collections.immutable.persistentListOf
 import kotlinx.collections.immutable.persistentMapOf
+import kotlinx.coroutines.launch
 import logcat.LogPriority
 import tachiyomi.core.common.i18n.stringResource
 import tachiyomi.core.common.storage.displayablePath
@@ -91,13 +102,16 @@ object SettingsDataScreen : SearchableSettings {
         val backupPreferences = Injekt.get<BackupPreferences>()
         val storagePreferences = Injekt.get<StoragePreferences>()
 
+        val syncPreferences = remember { Injekt.get<SyncPreferences>() }
+        val syncService by syncPreferences.syncService().collectAsState()
+
         return persistentListOf(
             getStorageLocationPref(storagePreferences = storagePreferences),
             Preference.PreferenceItem.InfoPreference(stringResource(MR.strings.pref_storage_location_info)),
 
             getBackupAndRestoreGroup(backupPreferences = backupPreferences),
             getDataGroup(),
-        )
+        ) + getSyncPreferences(syncPreferences = syncPreferences, syncService = syncService)
     }
 
     @Composable
@@ -330,4 +344,225 @@ object SettingsDataScreen : SearchableSettings {
             ),
         )
     }
+
+    @Composable
+    private fun getSyncPreferences(syncPreferences: SyncPreferences, syncService: Int): List<Preference> {
+        return listOf(
+            Preference.PreferenceGroup(
+                title = stringResource(MR.strings.pref_sync_service_category),
+                preferenceItems = persistentListOf(
+                    Preference.PreferenceItem.ListPreference(
+                        pref = syncPreferences.syncService(),
+                        title = stringResource(MR.strings.pref_sync_service),
+                        entries = persistentMapOf(
+                            SyncManager.SyncService.NONE.value to stringResource(MR.strings.off),
+                            SyncManager.SyncService.SYNCYOMI.value to stringResource(MR.strings.syncyomi),
+                            SyncManager.SyncService.GOOGLE_DRIVE.value to stringResource(MR.strings.google_drive),
+                        ),
+                        onValueChanged = { true },
+                    ),
+                ),
+            ),
+        ) + getSyncServicePreferences(syncPreferences, syncService)
+    }
+
+    @Composable
+    private fun getSyncServicePreferences(syncPreferences: SyncPreferences, syncService: Int): List<Preference> {
+        val syncServiceType = SyncManager.SyncService.fromInt(syncService)
+
+        val basePreferences = getBasePreferences(syncServiceType, syncPreferences)
+
+        return if (syncServiceType != SyncManager.SyncService.NONE) {
+            basePreferences + getAdditionalPreferences(syncPreferences)
+        } else {
+            basePreferences
+        }
+    }
+
+    @Composable
+    private fun getBasePreferences(
+        syncServiceType: SyncManager.SyncService,
+        syncPreferences: SyncPreferences,
+    ): List<Preference> {
+        return when (syncServiceType) {
+            SyncManager.SyncService.NONE -> emptyList()
+            SyncManager.SyncService.SYNCYOMI -> getSelfHostPreferences(syncPreferences)
+            SyncManager.SyncService.GOOGLE_DRIVE -> getGoogleDrivePreferences()
+        }
+    }
+
+    @Composable
+    private fun getAdditionalPreferences(syncPreferences: SyncPreferences): List<Preference> {
+        return listOf(getSyncNowPref(), getAutomaticSyncGroup(syncPreferences))
+    }
+
+    @Composable
+    private fun getGoogleDrivePreferences(): List<Preference> {
+        val context = LocalContext.current
+        val googleDriveSync = Injekt.get<GoogleDriveService>()
+        return listOf(
+            Preference.PreferenceItem.TextPreference(
+                title = stringResource(MR.strings.pref_google_drive_sign_in),
+                onClick = {
+                    val intent = googleDriveSync.getSignInIntent()
+                    context.startActivity(intent)
+                },
+            ),
+            getGoogleDrivePurge(),
+        )
+    }
+
+    @Composable
+    private fun getGoogleDrivePurge(): Preference.PreferenceItem.TextPreference {
+        val scope = rememberCoroutineScope()
+        val context = LocalContext.current
+        val googleDriveSync = remember { GoogleDriveSyncService(context) }
+        var showPurgeDialog by remember { mutableStateOf(false) }
+
+        if (showPurgeDialog) {
+            PurgeConfirmationDialog(
+                onConfirm = {
+                    showPurgeDialog = false
+                    scope.launch {
+                        val result = googleDriveSync.deleteSyncDataFromGoogleDrive()
+                        when (result) {
+                            GoogleDriveSyncService.DeleteSyncDataStatus.NOT_INITIALIZED -> context.toast(
+                                MR.strings.google_drive_not_signed_in,
+                                duration = 5000,
+                            )
+                            GoogleDriveSyncService.DeleteSyncDataStatus.NO_FILES -> context.toast(
+                                MR.strings.google_drive_sync_data_not_found,
+                                duration = 5000,
+                            )
+                            GoogleDriveSyncService.DeleteSyncDataStatus.SUCCESS -> context.toast(
+                                MR.strings.google_drive_sync_data_purged,
+                                duration = 5000,
+                            )
+                            GoogleDriveSyncService.DeleteSyncDataStatus.ERROR -> context.toast(
+                                MR.strings.google_drive_sync_data_purge_error,
+                                duration = 10000,
+                            )
+                        }
+                    }
+                },
+                onDismissRequest = { showPurgeDialog = false },
+            )
+        }
+
+        return Preference.PreferenceItem.TextPreference(
+            title = stringResource(MR.strings.pref_google_drive_purge_sync_data),
+            onClick = { showPurgeDialog = true },
+        )
+    }
+
+    @Composable
+    private fun PurgeConfirmationDialog(
+        onConfirm: () -> Unit,
+        onDismissRequest: () -> Unit,
+    ) {
+        AlertDialog(
+            onDismissRequest = onDismissRequest,
+            title = { Text(text = stringResource(MR.strings.pref_purge_confirmation_title)) },
+            text = { Text(text = stringResource(MR.strings.pref_purge_confirmation_message)) },
+            dismissButton = {
+                TextButton(onClick = onDismissRequest) {
+                    Text(text = stringResource(MR.strings.action_cancel))
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = onConfirm) {
+                    Text(text = stringResource(MR.strings.action_ok))
+                }
+            },
+        )
+    }
+
+    @Composable
+    private fun getSelfHostPreferences(syncPreferences: SyncPreferences): List<Preference> {
+        val scope = rememberCoroutineScope()
+        return listOf(
+            Preference.PreferenceItem.EditTextPreference(
+                title = stringResource(MR.strings.pref_sync_host),
+                subtitle = stringResource(MR.strings.pref_sync_host_summ),
+                pref = syncPreferences.clientHost(),
+                onValueChanged = { newValue ->
+                    scope.launch {
+                        // Trim spaces at the beginning and end, then remove trailing slash if present
+                        val trimmedValue = newValue.trim()
+                        val modifiedValue = trimmedValue.trimEnd { it == '/' }
+                        syncPreferences.clientHost().set(modifiedValue)
+                    }
+                    true
+                },
+            ),
+            Preference.PreferenceItem.EditTextPreference(
+                title = stringResource(MR.strings.pref_sync_api_key),
+                subtitle = stringResource(MR.strings.pref_sync_api_key_summ),
+                pref = syncPreferences.clientAPIKey(),
+            ),
+        )
+    }
+
+    @Composable
+    private fun getSyncNowPref(): Preference.PreferenceGroup {
+        val navigator = LocalNavigator.currentOrThrow
+        return Preference.PreferenceGroup(
+            title = stringResource(MR.strings.pref_sync_now_group_title),
+            preferenceItems = persistentListOf(
+                getSyncOptionsPref(),
+                Preference.PreferenceItem.TextPreference(
+                    title = stringResource(MR.strings.pref_sync_now),
+                    subtitle = stringResource(MR.strings.pref_sync_now_subtitle),
+                    onClick = {
+                        navigator.push(SyncSettingsSelector())
+                    },
+                ),
+            ),
+        )
+    }
+
+    @Composable
+    private fun getSyncOptionsPref(): Preference.PreferenceItem.TextPreference {
+        val navigator = LocalNavigator.currentOrThrow
+        return Preference.PreferenceItem.TextPreference(
+            title = stringResource(MR.strings.pref_sync_options),
+            subtitle = stringResource(MR.strings.pref_sync_options_summ),
+            onClick = { navigator.push(SyncTriggerOptionsScreen()) },
+        )
+    }
+
+    @Composable
+    private fun getAutomaticSyncGroup(syncPreferences: SyncPreferences): Preference.PreferenceGroup {
+        val context = LocalContext.current
+        val syncIntervalPref = syncPreferences.syncInterval()
+        val lastSync by syncPreferences.lastSyncTimestamp().collectAsState()
+
+        return Preference.PreferenceGroup(
+            title = stringResource(MR.strings.pref_sync_automatic_category),
+            preferenceItems = persistentListOf(
+                Preference.PreferenceItem.ListPreference(
+                    pref = syncIntervalPref,
+                    title = stringResource(MR.strings.pref_sync_interval),
+                    entries = persistentMapOf(
+                        0 to stringResource(MR.strings.off),
+                        30 to stringResource(MR.strings.update_30min),
+                        60 to stringResource(MR.strings.update_1hour),
+                        180 to stringResource(MR.strings.update_3hour),
+                        360 to stringResource(MR.strings.update_6hour),
+                        720 to stringResource(MR.strings.update_12hour),
+                        1440 to stringResource(MR.strings.update_24hour),
+                        2880 to stringResource(MR.strings.update_48hour),
+                        10080 to stringResource(MR.strings.update_weekly),
+                    ),
+                    onValueChanged = {
+                        SyncDataJob.setupTask(context, it)
+                        true
+                    },
+                ),
+                Preference.PreferenceItem.InfoPreference(
+                    stringResource(MR.strings.last_synchronization, relativeTimeSpanString(lastSync)),
+                ),
+            ),
+        )
+    }
 }

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsLibraryScreen.kt

@@ -235,11 +235,13 @@ object SettingsLibraryScreen : SearchableSettings {
                     pref = libraryPreferences.newShowUpdatesCount(),
                     title = stringResource(MR.strings.pref_library_update_show_tab_badge),
                 ),
+                // SY -->
                 Preference.PreferenceItem.SwitchPreference(
                     pref = libraryPreferences.libraryReadDuplicateChapters(),
-                    title = stringResource(MR.strings.pref_library_mark_duplicate_chapters),
+                    title = stringResource(SYMR.strings.pref_library_mark_duplicate_chapters),
-                    subtitle = stringResource(MR.strings.pref_library_mark_duplicate_chapters_summary),
+                    subtitle = stringResource(SYMR.strings.pref_library_mark_duplicate_chapters_summary),
                 ),
+                // SY <--
             ),
         )
     }

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsReaderScreen.kt

@@ -178,11 +178,13 @@ object SettingsReaderScreen : SearchableSettings {
                     pref = readerPreferences.skipDupe(),
                     title = stringResource(MR.strings.pref_skip_dupe_chapters),
                 ),
+                // SY -->
                 Preference.PreferenceItem.SwitchPreference(
                     pref = readerPreferences.markReadDupe(),
-                    title = stringResource(MR.strings.pref_mark_read_dupe_chapters),
+                    title = stringResource(SYMR.strings.pref_mark_read_dupe_chapters),
-                    subtitle = stringResource(MR.strings.pref_mark_read_dupe_chapters_summary),
+                    subtitle = stringResource(SYMR.strings.pref_mark_read_dupe_chapters_summary),
                 ),
+                // SY <--
                 Preference.PreferenceItem.SwitchPreference(
                     pref = readerPreferences.alwaysShowChapterTransition(),
                     title = stringResource(MR.strings.pref_always_show_chapter_transition),
@@ -570,10 +572,14 @@ object SettingsReaderScreen : SearchableSettings {
                         .toMap()
                         .toImmutableMap(),
                 ),
-                Preference.PreferenceItem.SwitchPreference(
+                Preference.PreferenceItem.ListPreference(
-                    pref = readerPreferences.cacheArchiveMangaOnDisk(),
+                    pref = readerPreferences.archiveReaderMode(),
-                    title = stringResource(SYMR.strings.cache_archived_manga_to_disk),
+                    title = stringResource(SYMR.strings.pref_archive_reader_mode),
-                    subtitle = stringResource(SYMR.strings.cache_archived_manga_to_disk_subtitle),
+                    subtitle = stringResource(SYMR.strings.pref_archive_reader_mode_summary),
+                    entries = ReaderPreferences.archiveModeTypes
+                        .mapIndexed { index, it -> index to stringResource(it) }
+                        .toMap()
+                        .toImmutableMap(),
                 ),
             ),
         )

app/src/main/java/eu/kanade/presentation/more/settings/screen/data/SyncSettingsSelector.kt

@@ -0,0 +1,142 @@
+package eu.kanade.presentation.more.settings.screen.data
+
+import android.content.Context
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.platform.LocalContext
+import cafe.adriel.voyager.core.model.StateScreenModel
+import cafe.adriel.voyager.core.model.rememberScreenModel
+import cafe.adriel.voyager.navigator.LocalNavigator
+import cafe.adriel.voyager.navigator.currentOrThrow
+import eu.kanade.domain.sync.SyncPreferences
+import eu.kanade.domain.sync.models.SyncSettings
+import eu.kanade.presentation.components.AppBar
+import eu.kanade.presentation.util.Screen
+import eu.kanade.tachiyomi.data.backup.create.BackupOptions
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
+import eu.kanade.tachiyomi.util.system.toast
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.coroutines.flow.update
+import tachiyomi.i18n.MR
+import tachiyomi.presentation.core.components.LabeledCheckbox
+import tachiyomi.presentation.core.components.LazyColumnWithAction
+import tachiyomi.presentation.core.components.SectionCard
+import tachiyomi.presentation.core.components.material.Scaffold
+import tachiyomi.presentation.core.i18n.stringResource
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+
+class SyncSettingsSelector : Screen() {
+    @Composable
+    override fun Content() {
+        val context = LocalContext.current
+        val navigator = LocalNavigator.currentOrThrow
+        val model = rememberScreenModel { SyncSettingsSelectorModel() }
+        val state by model.state.collectAsState()
+
+        Scaffold(
+            topBar = {
+                AppBar(
+                    title = stringResource(MR.strings.pref_choose_what_to_sync),
+                    navigateUp = navigator::pop,
+                    scrollBehavior = it,
+                )
+            },
+        ) { contentPadding ->
+            LazyColumnWithAction(
+                contentPadding = contentPadding,
+                actionLabel = stringResource(MR.strings.label_sync),
+                actionEnabled = state.options.anyEnabled(),
+                onClickAction = {
+                    if (!SyncDataJob.isAnyJobRunning(context)) {
+                        model.syncNow(context)
+                        navigator.pop()
+                    } else {
+                        context.toast(MR.strings.sync_in_progress)
+                    }
+                },
+            ) {
+                item {
+                    SectionCard(MR.strings.label_library) {
+                        Options(BackupOptions.libraryOptions, state, model)
+                    }
+                }
+
+                item {
+                    SectionCard(MR.strings.label_settings) {
+                        Options(BackupOptions.settingsOptions, state, model)
+                    }
+                }
+            }
+        }
+    }
+
+    @Composable
+    private fun Options(
+        options: ImmutableList<BackupOptions.Entry>,
+        state: SyncSettingsSelectorModel.State,
+        model: SyncSettingsSelectorModel,
+    ) {
+        options.forEach { option ->
+            LabeledCheckbox(
+                label = stringResource(option.label),
+                checked = option.getter(state.options),
+                onCheckedChange = {
+                    model.toggle(option.setter, it)
+                },
+                enabled = option.enabled(state.options),
+            )
+        }
+    }
+}
+
+private class SyncSettingsSelectorModel(
+    val syncPreferences: SyncPreferences = Injekt.get(),
+) : StateScreenModel<SyncSettingsSelectorModel.State>(
+    State(syncOptionsToBackupOptions(syncPreferences.getSyncSettings())),
+) {
+    fun toggle(setter: (BackupOptions, Boolean) -> BackupOptions, enabled: Boolean) {
+        mutableState.update {
+            val updatedOptions = setter(it.options, enabled)
+            syncPreferences.setSyncSettings(backupOptionsToSyncOptions(updatedOptions))
+            it.copy(options = updatedOptions)
+        }
+    }
+
+    fun syncNow(context: Context) {
+        SyncDataJob.startNow(context)
+    }
+
+    @Immutable
+    data class State(
+        val options: BackupOptions = BackupOptions(),
+    ) companion object {
+        private fun syncOptionsToBackupOptions(syncSettings: SyncSettings): BackupOptions {
+            return BackupOptions(
+                libraryEntries = syncSettings.libraryEntries,
+                categories = syncSettings.categories,
+                chapters = syncSettings.chapters,
+                tracking = syncSettings.tracking,
+                history = syncSettings.history,
+                appSettings = syncSettings.appSettings,
+                sourceSettings = syncSettings.sourceSettings,
+                privateSettings = syncSettings.privateSettings,
+            )
+        }
+
+        private fun backupOptionsToSyncOptions(backupOptions: BackupOptions): SyncSettings {
+            return SyncSettings(
+                libraryEntries = backupOptions.libraryEntries,
+                categories = backupOptions.categories,
+                chapters = backupOptions.chapters,
+                tracking = backupOptions.tracking,
+                history = backupOptions.history,
+                appSettings = backupOptions.appSettings,
+                sourceSettings = backupOptions.sourceSettings,
+                privateSettings = backupOptions.privateSettings,
+            )
+        }
+    }
+}

app/src/main/java/eu/kanade/presentation/more/settings/screen/data/SyncTriggerOptionsScreen.kt

@@ -0,0 +1,101 @@
+package eu.kanade.presentation.more.settings.screen.data
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import cafe.adriel.voyager.core.model.StateScreenModel
+import cafe.adriel.voyager.core.model.rememberScreenModel
+import cafe.adriel.voyager.navigator.LocalNavigator
+import cafe.adriel.voyager.navigator.currentOrThrow
+import eu.kanade.domain.sync.SyncPreferences
+import eu.kanade.presentation.components.AppBar
+import eu.kanade.presentation.util.Screen
+import eu.kanade.tachiyomi.data.sync.models.SyncTriggerOptions
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.coroutines.flow.update
+import tachiyomi.i18n.MR
+import tachiyomi.presentation.core.components.LabeledCheckbox
+import tachiyomi.presentation.core.components.LazyColumnWithAction
+import tachiyomi.presentation.core.components.SectionCard
+import tachiyomi.presentation.core.components.material.Scaffold
+import tachiyomi.presentation.core.i18n.stringResource
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+
+class SyncTriggerOptionsScreen : Screen() {
+
+    @Composable
+    override fun Content() {
+        val navigator = LocalNavigator.currentOrThrow
+        val model = rememberScreenModel { SyncOptionsScreenModel() }
+        val state by model.state.collectAsState()
+
+        Scaffold(
+            topBar = {
+                AppBar(
+                    title = stringResource(MR.strings.pref_sync_options),
+                    navigateUp = navigator::pop,
+                    scrollBehavior = it,
+                )
+            },
+        ) { contentPadding ->
+            LazyColumnWithAction(
+                contentPadding = contentPadding,
+                actionLabel = stringResource(MR.strings.action_save),
+                actionEnabled = state.options.anyEnabled(),
+                onClickAction = {
+                    navigator.pop()
+                },
+            ) {
+                item {
+                    SectionCard(MR.strings.label_triggers) {
+                        Options(SyncTriggerOptions.mainOptions, state, model)
+                    }
+                }
+            }
+        }
+    }
+
+    @Composable
+    private fun Options(
+        options: ImmutableList<SyncTriggerOptions.Entry>,
+        state: SyncOptionsScreenModel.State,
+        model: SyncOptionsScreenModel,
+    ) {
+        options.forEach { option ->
+            LabeledCheckbox(
+                label = stringResource(option.label),
+                checked = option.getter(state.options),
+                onCheckedChange = {
+                    model.toggle(option.setter, it)
+                },
+                enabled = option.enabled(state.options),
+            )
+        }
+    }
+}
+
+private class SyncOptionsScreenModel(
+    val syncPreferences: SyncPreferences = Injekt.get(),
+) : StateScreenModel<SyncOptionsScreenModel.State>(
+    State(
+        syncPreferences.getSyncTriggerOptions(),
+    ),
+) {
+
+    fun toggle(setter: (SyncTriggerOptions, Boolean) -> SyncTriggerOptions, enabled: Boolean) {
+        mutableState.update {
+            val updatedTriggerOptions = setter(it.options, enabled)
+            syncPreferences.setSyncTriggerOptions(updatedTriggerOptions)
+            it.copy(
+                options = updatedTriggerOptions,
+            )
+        }
+    }
+
+    @Immutable
+    data class State(
+        val options: SyncTriggerOptions = SyncTriggerOptions(),
+    )
+}

app/src/main/java/eu/kanade/tachiyomi/App.kt

@@ -35,6 +35,7 @@ import com.google.firebase.ktx.Firebase
 import eu.kanade.domain.DomainModule
 import eu.kanade.domain.SYDomainModule
 import eu.kanade.domain.base.BasePreferences
+import eu.kanade.domain.sync.SyncPreferences
 import eu.kanade.domain.ui.UiPreferences
 import eu.kanade.domain.ui.model.setAppCompatDelegateThemeMode
 import eu.kanade.tachiyomi.crash.CrashActivity
@@ -46,6 +47,7 @@ import eu.kanade.tachiyomi.data.coil.PagePreviewFetcher
 import eu.kanade.tachiyomi.data.coil.PagePreviewKeyer
 import eu.kanade.tachiyomi.data.coil.TachiyomiImageDecoder
 import eu.kanade.tachiyomi.data.notification.Notifications
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
 import eu.kanade.tachiyomi.di.AppModule
 import eu.kanade.tachiyomi.di.PreferenceModule
 import eu.kanade.tachiyomi.di.SYPreferenceModule
@@ -166,6 +168,13 @@ class App : Application(), DefaultLifecycleObserver, SingletonImageLoader.Factor
         /*if (!LogcatLogger.isInstalled && networkPreferences.verboseLogging().get()) {
             LogcatLogger.install(AndroidLogcatLogger(LogPriority.VERBOSE))
         }*/
+
+        val syncPreferences: SyncPreferences = Injekt.get()
+        val syncTriggerOpt = syncPreferences.getSyncTriggerOptions()
+        if (syncPreferences.isSyncEnabled() && syncTriggerOpt.syncOnAppStart
+        ) {
+            SyncDataJob.startNow(this@App)
+        }
     }
 
     override fun newImageLoader(context: Context): ImageLoader {
@@ -197,6 +206,13 @@ class App : Application(), DefaultLifecycleObserver, SingletonImageLoader.Factor
 
     override fun onStart(owner: LifecycleOwner) {
         SecureActivityDelegate.onApplicationStart()
+
+        val syncPreferences: SyncPreferences = Injekt.get()
+        val syncTriggerOpt = syncPreferences.getSyncTriggerOptions()
+        if (syncPreferences.isSyncEnabled() && syncTriggerOpt.syncOnAppResume
+        ) {
+            SyncDataJob.startNow(this@App)
+        }
     }
 
     override fun onStop(owner: LifecycleOwner) {
@@ -230,6 +246,12 @@ class App : Application(), DefaultLifecycleObserver, SingletonImageLoader.Factor
         } catch (e: Exception) {
             logcat(LogPriority.ERROR, e) { "Failed to modify notification channels" }
         }
+
+        val syncPreferences: SyncPreferences = Injekt.get()
+        val syncTriggerOpt = syncPreferences.getSyncTriggerOptions()
+        if (syncPreferences.isSyncEnabled() && syncTriggerOpt.syncOnAppStart) {
+            SyncDataJob.startNow(this@App)
+        }
     }
 
     // EXH

app/src/main/java/eu/kanade/tachiyomi/data/backup/create/BackupCreator.kt

@@ -132,34 +132,34 @@ class BackupCreator(
         }
     }
 
-    private suspend fun backupCategories(options: BackupOptions): List<BackupCategory> {
+    suspend fun backupCategories(options: BackupOptions): List<BackupCategory> {
         if (!options.categories) return emptyList()
 
         return categoriesBackupCreator.backupCategories()
     }
 
-    private suspend fun backupMangas(mangas: List<Manga>, options: BackupOptions): List<BackupManga> {
+    suspend fun backupMangas(mangas: List<Manga>, options: BackupOptions): List<BackupManga> {
         return mangaBackupCreator.backupMangas(mangas, options)
     }
 
-    private fun backupSources(mangas: List<Manga>): List<BackupSource> {
+    fun backupSources(mangas: List<Manga>): List<BackupSource> {
         return sourcesBackupCreator.backupSources(mangas)
     }
 
-    private fun backupAppPreferences(options: BackupOptions): List<BackupPreference> {
+    fun backupAppPreferences(options: BackupOptions): List<BackupPreference> {
         if (!options.appSettings) return emptyList()
 
         return preferenceBackupCreator.backupAppPreferences(includePrivatePreferences = options.privateSettings)
     }
 
-    private fun backupSourcePreferences(options: BackupOptions): List<BackupSourcePreferences> {
+    fun backupSourcePreferences(options: BackupOptions): List<BackupSourcePreferences> {
         if (!options.sourceSettings) return emptyList()
 
         return preferenceBackupCreator.backupSourcePreferences(includePrivatePreferences = options.privateSettings)
     }
 
     // SY -->
-    private suspend fun backupSavedSearches(): List<BackupSavedSearch> {
+    suspend fun backupSavedSearches(): List<BackupSavedSearch> {
         return savedSearchBackupCreator.backupSavedSearches()
     }
     // SY <--

app/src/main/java/eu/kanade/tachiyomi/data/backup/create/creators/MangaBackupCreator.kt

@@ -134,6 +134,7 @@ private fun Manga.toBackupManga(/* SY --> */customMangaInfo: CustomMangaInfo?/*
         updateStrategy = this.updateStrategy,
         lastModifiedAt = this.lastModifiedAt,
         favoriteModifiedAt = this.favoriteModifiedAt,
+        version = this.version,
         // SY -->
     ).also { backupManga ->
         customMangaInfo?.let {

app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupChapter.kt

@@ -4,6 +4,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.protobuf.ProtoNumber
 import tachiyomi.domain.chapter.model.Chapter
 
+@Suppress("MagicNumber")
 @Serializable
 data class BackupChapter(
     // in 1.x some of these values have different names
@@ -21,6 +22,7 @@ data class BackupChapter(
     @ProtoNumber(9) var chapterNumber: Float = 0F,
     @ProtoNumber(10) var sourceOrder: Long = 0,
     @ProtoNumber(11) var lastModifiedAt: Long = 0,
+    @ProtoNumber(12) var version: Long = 0,
 ) {
     fun toChapterImpl(): Chapter {
         return Chapter.create().copy(
@@ -35,36 +37,40 @@ data class BackupChapter(
             dateUpload = this@BackupChapter.dateUpload,
             sourceOrder = this@BackupChapter.sourceOrder,
             lastModifiedAt = this@BackupChapter.lastModifiedAt,
+            version = this@BackupChapter.version,
         )
     }
 }
 
-val backupChapterMapper =
+val backupChapterMapper = {
-    { _: Long,
+        _: Long,
-            _: Long,
+        _: Long,
-            url: String,
+        url: String,
-            name: String,
+        name: String,
-            scanlator: String?,
+        scanlator: String?,
-            read: Boolean,
+        read: Boolean,
-            bookmark: Boolean,
+        bookmark: Boolean,
-            lastPageRead: Long,
+        lastPageRead: Long,
-            chapterNumber: Double,
+        chapterNumber: Double,
-            source_order: Long,
+        sourceOrder: Long,
-            dateFetch: Long,
+        dateFetch: Long,
-            dateUpload: Long,
+        dateUpload: Long,
-            lastModifiedAt: Long,
+        lastModifiedAt: Long,
-        ->
+        version: Long,
-        BackupChapter(
+        _: Long,
-            url = url,
+    ->
-            name = name,
+    BackupChapter(
-            chapterNumber = chapterNumber.toFloat(),
+        url = url,
-            scanlator = scanlator,
+        name = name,
-            read = read,
+        chapterNumber = chapterNumber.toFloat(),
-            bookmark = bookmark,
+        scanlator = scanlator,
-            lastPageRead = lastPageRead,
+        read = read,
-            dateFetch = dateFetch,
+        bookmark = bookmark,
-            dateUpload = dateUpload,
+        lastPageRead = lastPageRead,
-            sourceOrder = source_order,
+        dateFetch = dateFetch,
-            lastModifiedAt = lastModifiedAt,
+        dateUpload = dateUpload,
-        )
+        sourceOrder = sourceOrder,
-    }
+        lastModifiedAt = lastModifiedAt,
+        version = version,
+    )
+}

app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupManga.kt

@@ -6,7 +6,10 @@ import kotlinx.serialization.protobuf.ProtoNumber
 import tachiyomi.domain.manga.model.CustomMangaInfo
 import tachiyomi.domain.manga.model.Manga
 
-@Suppress("DEPRECATION")
+@Suppress(
+    "DEPRECATION",
+    "MagicNumber",
+)
 @Serializable
 data class BackupManga(
     // in 1.x some of these values have different names
@@ -40,6 +43,7 @@ data class BackupManga(
     @ProtoNumber(106) var lastModifiedAt: Long = 0,
     @ProtoNumber(107) var favoriteModifiedAt: Long? = null,
     @ProtoNumber(108) var excludedScanlators: List<String> = emptyList(),
+    @ProtoNumber(109) var version: Long = 0,
 
     // SY specific values
     @ProtoNumber(600) var mergedMangaReferences: List<BackupMergedMangaReference> = emptyList(),
@@ -76,6 +80,7 @@ data class BackupManga(
             updateStrategy = this@BackupManga.updateStrategy,
             lastModifiedAt = this@BackupManga.lastModifiedAt,
             favoriteModifiedAt = this@BackupManga.favoriteModifiedAt,
+            version = this@BackupManga.version,
         )
     }
 }

app/src/main/java/eu/kanade/tachiyomi/data/backup/restore/BackupRestorer.kt

@@ -34,7 +34,7 @@ class BackupRestorer(
 
     private val categoriesRestorer: CategoriesRestorer = CategoriesRestorer(),
     private val preferenceRestorer: PreferenceRestorer = PreferenceRestorer(context),
-    private val mangaRestorer: MangaRestorer = MangaRestorer(),
+    private val mangaRestorer: MangaRestorer = MangaRestorer(isSync),
     // SY -->
     private val savedSearchRestorer: SavedSearchRestorer = SavedSearchRestorer(),
     // SY <--

app/src/main/java/eu/kanade/tachiyomi/data/backup/restore/restorers/MangaRestorer.kt

@@ -33,6 +33,8 @@ import java.util.Date
 import kotlin.math.max
 
 class MangaRestorer(
+    private var isSync: Boolean = false,
+
     private val handler: DatabaseHandler = Injekt.get(),
     private val getCategories: GetCategories = Injekt.get(),
     private val getMangaByUrlAndSourceId: GetMangaByUrlAndSourceId = Injekt.get(),
@@ -47,7 +49,6 @@ class MangaRestorer(
     private val getFlatMetadataById: GetFlatMetadataById = Injekt.get(),
     // SY <--
 ) {
-
     private var now = ZonedDateTime.now()
     private var currentFetchWindow = fetchInterval.getWindow(now)
 
@@ -97,6 +98,11 @@ class MangaRestorer(
                 customManga = backupManga.getCustomMangaInfo(),
                 // SY <--
             )
+
+            if (isSync) {
+                mangasQueries.resetIsSyncing()
+                chaptersQueries.resetIsSyncing()
+            }
         }
     }
 
@@ -105,7 +111,7 @@ class MangaRestorer(
     }
 
     private suspend fun restoreExistingManga(manga: Manga, dbManga: Manga): Manga {
-        return if (manga.lastModifiedAt > dbManga.lastModifiedAt) {
+        return if (manga.version > dbManga.version) {
             updateManga(dbManga.copyFrom(manga).copy(id = dbManga.id))
         } else {
             updateManga(manga.copyFrom(dbManga).copy(id = dbManga.id))
@@ -124,10 +130,11 @@ class MangaRestorer(
             ogStatus = newer.status,
             // SY <--
             initialized = this.initialized || newer.initialized,
+            version = newer.version,
         )
     }
 
-    private suspend fun updateManga(manga: Manga): Manga {
+    suspend fun updateManga(manga: Manga): Manga {
         handler.await(true) {
             mangasQueries.update(
                 source = manga.source,
@@ -150,6 +157,8 @@ class MangaRestorer(
                 dateAdded = manga.dateAdded,
                 mangaId = manga.id,
                 updateStrategy = manga.updateStrategy.let(UpdateStrategyColumnAdapter::encode),
+                version = manga.version,
+                isSyncing = 1,
             )
         }
         return manga
@@ -161,6 +170,7 @@ class MangaRestorer(
         return manga.copy(
             initialized = manga.description != null,
             id = insertManga(manga),
+            version = manga.version,
         )
     }
 
@@ -169,36 +179,15 @@ class MangaRestorer(
             .associateBy { it.url }
 
         val (existingChapters, newChapters) = backupChapters
-            .mapNotNull {
+            .mapNotNull { backupChapter ->
-                val chapter = it.toChapterImpl().copy(mangaId = manga.id)
+                val chapter = backupChapter.toChapterImpl().copy(mangaId = manga.id)
-
                 val dbChapter = dbChaptersByUrl[chapter.url]
-                    ?: // New chapter
-                    return@mapNotNull chapter
 
-                if (chapter.forComparison() == dbChapter.forComparison()) {
+                when {
-                    // Same state; skip
+                    dbChapter == null -> chapter // New chapter
-                    return@mapNotNull null
+                    chapter.forComparison() == dbChapter.forComparison() -> null // Same state; skip
+                    else -> updateChapterBasedOnSyncState(chapter, dbChapter)
                 }
-
-                // Update to an existing chapter
-                var updatedChapter = chapter
-                    .copyFrom(dbChapter)
-                    .copy(
-                        id = dbChapter.id,
-                        bookmark = chapter.bookmark || dbChapter.bookmark,
-                    )
-                if (dbChapter.read && !updatedChapter.read) {
-                    updatedChapter = updatedChapter.copy(
-                        read = true,
-                        lastPageRead = dbChapter.lastPageRead,
-                    )
-                } else if (updatedChapter.lastPageRead == 0L && dbChapter.lastPageRead != 0L) {
-                    updatedChapter = updatedChapter.copy(
-                        lastPageRead = dbChapter.lastPageRead,
-                    )
-                }
-                updatedChapter
             }
             .partition { it.id > 0 }
 
@@ -206,8 +195,29 @@ class MangaRestorer(
         updateExistingChapters(existingChapters)
     }
 
+    private fun updateChapterBasedOnSyncState(chapter: Chapter, dbChapter: Chapter): Chapter {
+        return if (isSync) {
+            chapter.copy(
+                id = dbChapter.id,
+                bookmark = chapter.bookmark || dbChapter.bookmark,
+                read = chapter.read,
+                lastPageRead = chapter.lastPageRead,
+            )
+        } else {
+            chapter.copyFrom(dbChapter).let {
+                when {
+                    dbChapter.read && !it.read -> it.copy(read = true, lastPageRead = dbChapter.lastPageRead)
+                    it.lastPageRead == 0L && dbChapter.lastPageRead != 0L -> it.copy(
+                        lastPageRead = dbChapter.lastPageRead,
+                    )
+                    else -> it
+                }
+            }
+        }
+    }
+
     private fun Chapter.forComparison() =
-        this.copy(id = 0L, mangaId = 0L, dateFetch = 0L, dateUpload = 0L, lastModifiedAt = 0L)
+        this.copy(id = 0L, mangaId = 0L, dateFetch = 0L, dateUpload = 0L, lastModifiedAt = 0L, version = 0L)
 
     private suspend fun insertNewChapters(chapters: List<Chapter>) {
         handler.await(true) {
@@ -224,6 +234,7 @@ class MangaRestorer(
                     chapter.sourceOrder,
                     chapter.dateFetch,
                     chapter.dateUpload,
+                    chapter.version,
                 )
             }
         }
@@ -245,6 +256,8 @@ class MangaRestorer(
                     dateFetch = null,
                     dateUpload = null,
                     chapterId = chapter.id,
+                    version = chapter.version,
+                    isSyncing = 1,
                 )
             }
         }
@@ -277,6 +290,7 @@ class MangaRestorer(
                 coverLastModified = manga.coverLastModified,
                 dateAdded = manga.dateAdded,
                 updateStrategy = manga.updateStrategy,
+                version = manga.version,
             )
             mangasQueries.selectLastInsertedRowId()
         }

app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.kt

@@ -21,6 +21,8 @@ interface Chapter : SChapter, Serializable {
     var source_order: Int
 
     var last_modified: Long
+
+    var version: Long
 }
 
 fun Chapter.toDomainChapter(): DomainChapter? {
@@ -39,5 +41,6 @@ fun Chapter.toDomainChapter(): DomainChapter? {
         chapterNumber = chapter_number.toDouble(),
         scanlator = scanlator,
         lastModifiedAt = last_modified,
+        version = version,
     )
 }

app/src/main/java/eu/kanade/tachiyomi/data/database/models/ChapterImpl.kt

@@ -28,6 +28,8 @@ class ChapterImpl : Chapter {
 
     override var last_modified: Long = 0
 
+    override var version: Long = 0
+
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
         if (other == null || javaClass != other.javaClass) return false

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt

@@ -18,6 +18,7 @@ import kotlinx.coroutines.ensureActive
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.flow.onStart
@@ -336,19 +337,15 @@ class DownloadCache(
             }
 
             // Try to wait until extensions and sources have loaded
-            var sources = getSources()
+            // SY -->
-            if (sources.isEmpty()) {
+            var sources = emptyList<Source>()
-                withTimeoutOrNull(30.seconds) {
+            withTimeoutOrNull(30.seconds) {
-                    while (!extensionManager.isInitialized) {
+                extensionManager.isInitialized.first { it }
-                        delay(2.seconds)
+                sourceManager.isInitialized.first { it }
-                    }
 
-                    while (extensionManager.availableExtensionsFlow.value.isNotEmpty() && sources.isEmpty()) {
+                sources = getSources()
-                        delay(2.seconds)
-                        sources = getSources()
-                    }
-                }
             }
+            // SY <--
 
             val sourceMap = sources.associate { provider.getSourceDirName(it).lowercase() to it.id }
 

app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt

@@ -13,7 +13,6 @@ import eu.kanade.tachiyomi.source.UnmeteredSource
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.util.storage.CbzCrypto
-import eu.kanade.tachiyomi.util.storage.CbzCrypto.addFilesToZip
 import eu.kanade.tachiyomi.util.storage.DiskUtil
 import eu.kanade.tachiyomi.util.storage.DiskUtil.NOMEDIA_FILE
 import eu.kanade.tachiyomi.util.storage.saveTo
@@ -46,6 +45,7 @@ import logcat.LogPriority
 import nl.adaptivity.xmlutil.serialization.XML
 import okhttp3.Response
 import tachiyomi.core.common.i18n.stringResource
+import tachiyomi.core.common.storage.addFilesToZip
 import tachiyomi.core.common.storage.extension
 import tachiyomi.core.common.util.lang.launchIO
 import tachiyomi.core.common.util.lang.launchNow
@@ -572,10 +572,6 @@ class Downloader(
                 tmpDir,
                 imageFile,
                 filenamePrefix,
-                // SY -->
-                zip4jFile = null,
-                zip4jEntry = null,
-                // SY <--
             )
         } catch (e: Exception) {
             logcat(LogPriority.ERROR, e) { "Failed to split downloaded image" }

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateJob.kt

@@ -21,11 +21,13 @@ import eu.kanade.domain.chapter.interactor.SyncChaptersWithSource
 import eu.kanade.domain.manga.interactor.UpdateManga
 import eu.kanade.domain.manga.model.copyFrom
 import eu.kanade.domain.manga.model.toSManga
+import eu.kanade.domain.sync.SyncPreferences
 import eu.kanade.domain.track.model.toDbTrack
 import eu.kanade.domain.track.model.toDomainTrack
 import eu.kanade.tachiyomi.data.cache.CoverCache
 import eu.kanade.tachiyomi.data.download.DownloadManager
 import eu.kanade.tachiyomi.data.notification.Notifications
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
 import eu.kanade.tachiyomi.data.track.TrackStatus
 import eu.kanade.tachiyomi.data.track.TrackerManager
 import eu.kanade.tachiyomi.source.model.SManga
@@ -801,6 +803,7 @@ class LibraryUpdateJob(private val context: Context, workerParams: WorkerParamet
             // SY <--
         ): Boolean {
             val wm = context.workManager
+            // Check if the LibraryUpdateJob is already running
             if (wm.isRunning(TAG)) {
                 // Already running either as a scheduled or manual job
                 return false
@@ -814,12 +817,41 @@ class LibraryUpdateJob(private val context: Context, workerParams: WorkerParamet
                 KEY_GROUP_EXTRA to groupExtra,
                 // SY <--
             )
-            val request = OneTimeWorkRequestBuilder<LibraryUpdateJob>()
+
-                .addTag(TAG)
+            val syncPreferences: SyncPreferences = Injekt.get()
-                .addTag(WORK_NAME_MANUAL)
+
-                .setInputData(inputData)
+            // Always sync the data before library update if syncing is enabled.
-                .build()
+            if (syncPreferences.isSyncEnabled()) {
-            wm.enqueueUniqueWork(WORK_NAME_MANUAL, ExistingWorkPolicy.KEEP, request)
+                // Check if SyncDataJob is already running
+                if (wm.isRunning(SyncDataJob.TAG_MANUAL)) {
+                    // SyncDataJob is already running
+                    return false
+                }
+
+                // Define the SyncDataJob
+                val syncDataJob = OneTimeWorkRequestBuilder<SyncDataJob>()
+                    .addTag(SyncDataJob.TAG_MANUAL)
+                    .build()
+
+                // Chain SyncDataJob to run before LibraryUpdateJob
+                val libraryUpdateJob = OneTimeWorkRequestBuilder<LibraryUpdateJob>()
+                    .addTag(TAG)
+                    .addTag(WORK_NAME_MANUAL)
+                    .setInputData(inputData)
+                    .build()
+
+                wm.beginUniqueWork(WORK_NAME_MANUAL, ExistingWorkPolicy.KEEP, syncDataJob)
+                    .then(libraryUpdateJob)
+                    .enqueue()
+            } else {
+                val request = OneTimeWorkRequestBuilder<LibraryUpdateJob>()
+                    .addTag(TAG)
+                    .addTag(WORK_NAME_MANUAL)
+                    .setInputData(inputData)
+                    .build()
+
+                wm.enqueueUniqueWork(WORK_NAME_MANUAL, ExistingWorkPolicy.KEEP, request)
+            }
 
             return true
         }

app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt

@@ -10,6 +10,7 @@ import androidx.core.net.toUri
 import eu.kanade.tachiyomi.data.backup.restore.BackupRestoreJob
 import eu.kanade.tachiyomi.data.download.DownloadManager
 import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
 import eu.kanade.tachiyomi.data.updater.AppUpdateDownloadJob
 import eu.kanade.tachiyomi.ui.main.MainActivity
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity
@@ -71,6 +72,8 @@ class NotificationReceiver : BroadcastReceiver() {
                     "application/x-protobuf+gzip",
                 )
             ACTION_CANCEL_RESTORE -> cancelRestore(context)
+
+            ACTION_CANCEL_SYNC -> cancelSync(context)
             // Cancel library update and dismiss notification
             ACTION_CANCEL_LIBRARY_UPDATE -> cancelLibraryUpdate(context)
             // Start downloading app update
@@ -188,6 +191,15 @@ class NotificationReceiver : BroadcastReceiver() {
         AppUpdateDownloadJob.stop(context)
     }
 
+    /**
+     * Method called when user wants to stop a backup restore job.
+     *
+     * @param context context of application
+     */
+    private fun cancelSync(context: Context) {
+        SyncDataJob.stop(context)
+    }
+
     /**
      * Method called when user wants to mark manga chapters as read
      *
@@ -240,6 +252,8 @@ class NotificationReceiver : BroadcastReceiver() {
 
         private const val ACTION_CANCEL_RESTORE = "$ID.$NAME.CANCEL_RESTORE"
 
+        private const val ACTION_CANCEL_SYNC = "$ID.$NAME.CANCEL_SYNC"
+
         private const val ACTION_CANCEL_LIBRARY_UPDATE = "$ID.$NAME.CANCEL_LIBRARY_UPDATE"
 
         private const val ACTION_START_APP_UPDATE = "$ID.$NAME.ACTION_START_APP_UPDATE"
@@ -618,5 +632,25 @@ class NotificationReceiver : BroadcastReceiver() {
                 PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
             )
         }
+
+        /**
+         * Returns [PendingIntent] that cancels a sync restore job.
+         *
+         * @param context context of application
+         * @param notificationId id of notification
+         * @return [PendingIntent]
+         */
+        internal fun cancelSyncPendingBroadcast(context: Context, notificationId: Int): PendingIntent {
+            val intent = Intent(context, NotificationReceiver::class.java).apply {
+                action = ACTION_CANCEL_SYNC
+                putExtra(EXTRA_NOTIFICATION_ID, notificationId)
+            }
+            return PendingIntent.getBroadcast(
+                context,
+                0,
+                intent,
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+            )
+        }
     }
 }

app/src/main/java/eu/kanade/tachiyomi/data/sync/SyncDataJob.kt

@@ -0,0 +1,102 @@
+package eu.kanade.tachiyomi.data.sync
+
+import android.content.Context
+import android.content.pm.ServiceInfo
+import android.os.Build
+import androidx.work.CoroutineWorker
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.ExistingWorkPolicy
+import androidx.work.ForegroundInfo
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkerParameters
+import eu.kanade.domain.sync.SyncPreferences
+import eu.kanade.tachiyomi.data.notification.Notifications
+import eu.kanade.tachiyomi.util.system.cancelNotification
+import eu.kanade.tachiyomi.util.system.isRunning
+import eu.kanade.tachiyomi.util.system.workManager
+import logcat.LogPriority
+import tachiyomi.core.common.util.system.logcat
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.util.concurrent.TimeUnit
+
+class SyncDataJob(private val context: Context, workerParams: WorkerParameters) :
+    CoroutineWorker(context, workerParams) {
+
+    private val notifier = SyncNotifier(context)
+
+    override suspend fun doWork(): Result {
+        try {
+            setForeground(getForegroundInfo())
+        } catch (e: IllegalStateException) {
+            logcat(LogPriority.ERROR, e) { "Not allowed to run on foreground service" }
+        }
+
+        return try {
+            SyncManager(context).syncData()
+            Result.success()
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, e)
+            notifier.showSyncError(e.message)
+            Result.failure()
+        } finally {
+            context.cancelNotification(Notifications.ID_RESTORE_PROGRESS)
+        }
+    }
+
+    override suspend fun getForegroundInfo(): ForegroundInfo {
+        return ForegroundInfo(
+            Notifications.ID_RESTORE_PROGRESS,
+            notifier.showSyncProgress().build(),
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC
+            } else {
+                0
+            },
+        )
+    }
+
+    companion object {
+        private const val TAG_JOB = "SyncDataJob"
+        private const val TAG_AUTO = "$TAG_JOB:auto"
+        const val TAG_MANUAL = "$TAG_JOB:manual"
+
+        private val jobTagList = listOf(TAG_AUTO, TAG_MANUAL)
+
+        fun isAnyJobRunning(context: Context): Boolean {
+            return jobTagList.any { context.workManager.isRunning(it) }
+        }
+
+        fun setupTask(context: Context, prefInterval: Int? = null) {
+            val syncPreferences = Injekt.get<SyncPreferences>()
+            val interval = prefInterval ?: syncPreferences.syncInterval().get()
+
+            if (interval > 0) {
+                val request = PeriodicWorkRequestBuilder<SyncDataJob>(
+                    interval.toLong(),
+                    TimeUnit.MINUTES,
+                    10,
+                    TimeUnit.MINUTES,
+                )
+                    .addTag(TAG_AUTO)
+                    .build()
+
+                context.workManager.enqueueUniquePeriodicWork(TAG_AUTO, ExistingPeriodicWorkPolicy.UPDATE, request)
+            } else {
+                context.workManager.cancelUniqueWork(TAG_AUTO)
+            }
+        }
+
+        fun startNow(context: Context) {
+            val request = OneTimeWorkRequestBuilder<SyncDataJob>()
+                .addTag(TAG_MANUAL)
+                .build()
+            context.workManager.enqueueUniqueWork(TAG_MANUAL, ExistingWorkPolicy.KEEP, request)
+        }
+
+        fun stop(context: Context) {
+            context.workManager.cancelUniqueWork(TAG_MANUAL)
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/sync/SyncManager.kt

@@ -0,0 +1,328 @@
+package eu.kanade.tachiyomi.data.sync
+
+import android.content.Context
+import android.net.Uri
+import eu.kanade.domain.sync.SyncPreferences
+import eu.kanade.tachiyomi.data.backup.create.BackupCreator
+import eu.kanade.tachiyomi.data.backup.create.BackupOptions
+import eu.kanade.tachiyomi.data.backup.models.Backup
+import eu.kanade.tachiyomi.data.backup.models.BackupChapter
+import eu.kanade.tachiyomi.data.backup.models.BackupManga
+import eu.kanade.tachiyomi.data.backup.models.BackupSerializer
+import eu.kanade.tachiyomi.data.backup.restore.BackupRestoreJob
+import eu.kanade.tachiyomi.data.backup.restore.RestoreOptions
+import eu.kanade.tachiyomi.data.backup.restore.restorers.MangaRestorer
+import eu.kanade.tachiyomi.data.sync.service.GoogleDriveSyncService
+import eu.kanade.tachiyomi.data.sync.service.SyncData
+import eu.kanade.tachiyomi.data.sync.service.SyncYomiSyncService
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.protobuf.ProtoBuf
+import logcat.LogPriority
+import logcat.logcat
+import tachiyomi.core.common.util.system.logcat
+import tachiyomi.data.Chapters
+import tachiyomi.data.DatabaseHandler
+import tachiyomi.data.manga.MangaMapper.mapManga
+import tachiyomi.domain.category.interactor.GetCategories
+import tachiyomi.domain.manga.model.Manga
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.io.File
+import java.io.IOException
+import java.util.Date
+import kotlin.system.measureTimeMillis
+
+/**
+ * A manager to handle synchronization tasks in the app, such as updating
+ * sync preferences and performing synchronization with a remote server.
+ *
+ * @property context The application context.
+ */
+class SyncManager(
+    private val context: Context,
+    private val handler: DatabaseHandler = Injekt.get(),
+    private val syncPreferences: SyncPreferences = Injekt.get(),
+    private var json: Json = Json {
+        encodeDefaults = true
+        ignoreUnknownKeys = true
+    },
+    private val getCategories: GetCategories = Injekt.get(),
+) {
+    private val backupCreator: BackupCreator = BackupCreator(context, false)
+    private val notifier: SyncNotifier = SyncNotifier(context)
+    private val mangaRestorer: MangaRestorer = MangaRestorer()
+
+    enum class SyncService(val value: Int) {
+        NONE(0),
+        SYNCYOMI(1),
+        GOOGLE_DRIVE(2),
+        ;
+
+        companion object {
+            fun fromInt(value: Int) = entries.firstOrNull { it.value == value } ?: NONE
+        }
+    }
+
+    /**
+     * Syncs data with a sync service.
+     *
+     * This function retrieves local data (favorites, manga, extensions, and categories)
+     * from the database using the BackupManager, then synchronizes the data with a sync service.
+     */
+    suspend fun syncData() {
+        // Reset isSyncing in case it was left over or failed syncing during restore.
+        handler.await(inTransaction = true) {
+            mangasQueries.resetIsSyncing()
+            chaptersQueries.resetIsSyncing()
+        }
+
+        val syncOptions = syncPreferences.getSyncSettings()
+        val databaseManga = getAllMangaThatNeedsSync()
+
+        val backupOptions = BackupOptions(
+            libraryEntries = syncOptions.libraryEntries,
+            categories = syncOptions.categories,
+            chapters = syncOptions.chapters,
+            tracking = syncOptions.tracking,
+            history = syncOptions.history,
+            appSettings = syncOptions.appSettings,
+            sourceSettings = syncOptions.sourceSettings,
+            privateSettings = syncOptions.privateSettings,
+        )
+        val backup = Backup(
+            backupManga = backupCreator.backupMangas(databaseManga, backupOptions),
+            backupCategories = backupCreator.backupCategories(backupOptions),
+            backupSources = backupCreator.backupSources(databaseManga),
+            backupPreferences = backupCreator.backupAppPreferences(backupOptions),
+            backupSourcePreferences = backupCreator.backupSourcePreferences(backupOptions),
+
+            // SY -->
+            backupSavedSearches = backupCreator.backupSavedSearches(),
+            // SY <--
+        )
+
+        // Create the SyncData object
+        val syncData = SyncData(
+            backup = backup,
+        )
+
+        // Handle sync based on the selected service
+        val syncService = when (val syncService = SyncService.fromInt(syncPreferences.syncService().get())) {
+            SyncService.SYNCYOMI -> {
+                SyncYomiSyncService(
+                    context,
+                    json,
+                    syncPreferences,
+                    notifier,
+                )
+            }
+
+            SyncService.GOOGLE_DRIVE -> {
+                GoogleDriveSyncService(context, json, syncPreferences)
+            }
+
+            else -> {
+                logcat(LogPriority.ERROR) { "Invalid sync service type: $syncService" }
+                null
+            }
+        }
+
+        val remoteBackup = syncService?.doSync(syncData)
+
+        // Stop the sync early if the remote backup is null or empty
+        if (remoteBackup?.backupManga?.size == 0) {
+            notifier.showSyncError("No data found on remote server.")
+            return
+        }
+
+        // Check if it's first sync based on lastSyncTimestamp
+        if (syncPreferences.lastSyncTimestamp().get() == 0L && databaseManga.isNotEmpty()) {
+            // It's first sync no need to restore data. (just update remote data)
+            syncPreferences.lastSyncTimestamp().set(Date().time)
+            notifier.showSyncSuccess("Updated remote data successfully")
+            return
+        }
+
+        if (remoteBackup != null) {
+            val (filteredFavorites, nonFavorites) = filterFavoritesAndNonFavorites(remoteBackup)
+            updateNonFavorites(nonFavorites)
+
+            val newSyncData = backup.copy(
+                backupManga = filteredFavorites,
+                backupCategories = remoteBackup.backupCategories,
+                backupSources = remoteBackup.backupSources,
+                backupPreferences = remoteBackup.backupPreferences,
+                backupSourcePreferences = remoteBackup.backupSourcePreferences,
+
+                // SY -->
+                backupSavedSearches = remoteBackup.backupSavedSearches,
+                // SY <--
+            )
+
+            // It's local sync no need to restore data. (just update remote data)
+            if (filteredFavorites.isEmpty()) {
+                // update the sync timestamp
+                syncPreferences.lastSyncTimestamp().set(Date().time)
+                notifier.showSyncSuccess("Sync completed successfully")
+                return
+            }
+
+            val backupUri = writeSyncDataToCache(context, newSyncData)
+            logcat(LogPriority.DEBUG) { "Got Backup Uri: $backupUri" }
+            if (backupUri != null) {
+                BackupRestoreJob.start(
+                    context,
+                    backupUri,
+                    sync = true,
+                    options = RestoreOptions(
+                        appSettings = true,
+                        sourceSettings = true,
+                        library = true,
+                    ),
+                )
+
+                // update the sync timestamp
+                syncPreferences.lastSyncTimestamp().set(Date().time)
+            } else {
+                logcat(LogPriority.ERROR) { "Failed to write sync data to file" }
+            }
+        }
+    }
+
+    private fun writeSyncDataToCache(context: Context, backup: Backup): Uri? {
+        val cacheFile = File(context.cacheDir, "tachiyomi_sync_data.proto.gz")
+        return try {
+            cacheFile.outputStream().use { output ->
+                output.write(ProtoBuf.encodeToByteArray(BackupSerializer, backup))
+                Uri.fromFile(cacheFile)
+            }
+        } catch (e: IOException) {
+            logcat(LogPriority.ERROR, throwable = e) { "Failed to write sync data to cache" }
+            null
+        }
+    }
+
+    /**
+     * Retrieves all manga from the local database.
+     *
+     * @return a list of all manga stored in the database
+     */
+    private suspend fun getAllMangaFromDB(): List<Manga> {
+        return handler.awaitList { mangasQueries.getAllManga(::mapManga) }
+    }
+
+    private suspend fun getAllMangaThatNeedsSync(): List<Manga> {
+        return handler.awaitList { mangasQueries.getMangasWithFavoriteTimestamp(::mapManga) }
+    }
+
+    private suspend fun isMangaDifferent(localManga: Manga, remoteManga: BackupManga): Boolean {
+        val localChapters = handler.await { chaptersQueries.getChaptersByMangaId(localManga.id, 0).executeAsList() }
+        val localCategories = getCategories.await(localManga.id).map { it.order }
+
+        if (areChaptersDifferent(localChapters, remoteManga.chapters)) {
+            return true
+        }
+
+        if (localManga.version != remoteManga.version) {
+            return true
+        }
+
+        if (localCategories.toSet() != remoteManga.categories.toSet()) {
+            return true
+        }
+
+        return false
+    }
+
+    private fun areChaptersDifferent(localChapters: List<Chapters>, remoteChapters: List<BackupChapter>): Boolean {
+        val localChapterMap = localChapters.associateBy { it.url }
+        val remoteChapterMap = remoteChapters.associateBy { it.url }
+
+        if (localChapterMap.size != remoteChapterMap.size) {
+            return true
+        }
+
+        for ((url, localChapter) in localChapterMap) {
+            val remoteChapter = remoteChapterMap[url]
+
+            // If a matching remote chapter doesn't exist, or the version numbers are different, consider them different
+            if (remoteChapter == null || localChapter.version != remoteChapter.version) {
+                return true
+            }
+        }
+
+        return false
+    }
+
+    /**
+     * Filters the favorite and non-favorite manga from the backup and checks
+     * if the favorite manga is different from the local database.
+     * @param backup the Backup object containing the backup data.
+     * @return a Pair of lists, where the first list contains different favorite manga
+     * and the second list contains non-favorite manga.
+     */
+    private suspend fun filterFavoritesAndNonFavorites(backup: Backup): Pair<List<BackupManga>, List<BackupManga>> {
+        val favorites = mutableListOf<BackupManga>()
+        val nonFavorites = mutableListOf<BackupManga>()
+        val logTag = "filterFavoritesAndNonFavorites"
+
+        val elapsedTimeMillis = measureTimeMillis {
+            val databaseManga = getAllMangaFromDB()
+            val localMangaMap = databaseManga.associateBy {
+                Triple(it.source, it.url, it.title)
+            }
+
+            logcat(LogPriority.DEBUG, logTag) { "Starting to filter favorites and non-favorites from backup data." }
+
+            backup.backupManga.forEach { remoteManga ->
+                val compositeKey = Triple(remoteManga.source, remoteManga.url, remoteManga.title)
+                val localManga = localMangaMap[compositeKey]
+                when {
+                    // Checks if the manga is in favorites and needs updating or adding
+                    remoteManga.favorite -> {
+                        if (localManga == null || isMangaDifferent(localManga, remoteManga)) {
+                            logcat(LogPriority.DEBUG, logTag) { "Adding to favorites: ${remoteManga.title}" }
+                            favorites.add(remoteManga)
+                        } else {
+                            logcat(LogPriority.DEBUG, logTag) { "Already up-to-date favorite: ${remoteManga.title}" }
+                        }
+                    }
+                    // Handle non-favorites
+                    !remoteManga.favorite -> {
+                        logcat(LogPriority.DEBUG, logTag) { "Adding to non-favorites: ${remoteManga.title}" }
+                        nonFavorites.add(remoteManga)
+                    }
+                }
+            }
+        }
+
+        val minutes = elapsedTimeMillis / 60000
+        val seconds = (elapsedTimeMillis % 60000) / 1000
+        logcat(LogPriority.DEBUG, logTag) {
+            "Filtering completed in ${minutes}m ${seconds}s. Favorites found: ${favorites.size}, " +
+                "Non-favorites found: ${nonFavorites.size}"
+        }
+
+        return Pair(favorites, nonFavorites)
+    }
+
+    /**
+     * Updates the non-favorite manga in the local database with their favorite status from the backup.
+     * @param nonFavorites the list of non-favorite BackupManga objects from the backup.
+     */
+    private suspend fun updateNonFavorites(nonFavorites: List<BackupManga>) {
+        val localMangaList = getAllMangaFromDB()
+
+        val localMangaMap = localMangaList.associateBy { Triple(it.source, it.url, it.title) }
+
+        nonFavorites.forEach { nonFavorite ->
+            val key = Triple(nonFavorite.source, nonFavorite.url, nonFavorite.title)
+            localMangaMap[key]?.let { localManga ->
+                if (localManga.favorite != nonFavorite.favorite) {
+                    val updatedManga = localManga.copy(favorite = nonFavorite.favorite)
+                    mangaRestorer.updateManga(updatedManga)
+                }
+            }
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/sync/SyncNotifier.kt

@@ -0,0 +1,86 @@
+package eu.kanade.tachiyomi.data.sync
+
+import android.content.Context
+import android.graphics.BitmapFactory
+import androidx.core.app.NotificationCompat
+import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.core.security.SecurityPreferences
+import eu.kanade.tachiyomi.data.notification.NotificationReceiver
+import eu.kanade.tachiyomi.data.notification.Notifications
+import eu.kanade.tachiyomi.util.system.cancelNotification
+import eu.kanade.tachiyomi.util.system.notificationBuilder
+import eu.kanade.tachiyomi.util.system.notify
+import uy.kohesive.injekt.injectLazy
+
+class SyncNotifier(private val context: Context) {
+
+    private val preferences: SecurityPreferences by injectLazy()
+
+    private val progressNotificationBuilder = context.notificationBuilder(
+        Notifications.CHANNEL_BACKUP_RESTORE_PROGRESS,
+    ) {
+        setLargeIcon(BitmapFactory.decodeResource(context.resources, R.mipmap.ic_launcher))
+        setSmallIcon(R.drawable.ic_tachi)
+        setAutoCancel(false)
+        setOngoing(true)
+        setOnlyAlertOnce(true)
+    }
+
+    private val completeNotificationBuilder = context.notificationBuilder(
+        Notifications.CHANNEL_BACKUP_RESTORE_PROGRESS,
+    ) {
+        setLargeIcon(BitmapFactory.decodeResource(context.resources, R.mipmap.ic_launcher))
+        setSmallIcon(R.drawable.ic_tachi)
+        setAutoCancel(false)
+    }
+
+    private fun NotificationCompat.Builder.show(id: Int) {
+        context.notify(id, build())
+    }
+
+    fun showSyncProgress(content: String = "", progress: Int = 0, maxAmount: Int = 100): NotificationCompat.Builder {
+        val builder = with(progressNotificationBuilder) {
+            setContentTitle(context.getString(R.string.syncing_library))
+
+            if (!preferences.hideNotificationContent().get()) {
+                setContentText(content)
+            }
+
+            setProgress(maxAmount, progress, true)
+            setOnlyAlertOnce(true)
+
+            clearActions()
+            addAction(
+                R.drawable.ic_close_24dp,
+                context.getString(R.string.action_cancel),
+                NotificationReceiver.cancelSyncPendingBroadcast(context, Notifications.ID_RESTORE_PROGRESS),
+            )
+        }
+
+        builder.show(Notifications.ID_RESTORE_PROGRESS)
+
+        return builder
+    }
+
+    fun showSyncError(error: String?) {
+        context.cancelNotification(Notifications.ID_RESTORE_PROGRESS)
+
+        with(completeNotificationBuilder) {
+            setContentTitle(context.getString(R.string.sync_error))
+            setContentText(error)
+
+            show(Notifications.ID_RESTORE_COMPLETE)
+        }
+    }
+
+    fun showSyncSuccess(message: String?) {
+        context.cancelNotification(Notifications.ID_RESTORE_PROGRESS)
+
+        with(completeNotificationBuilder) {
+            setContentTitle(context.getString(R.string.sync_complete))
+            setContentText(message)
+
+            show(Notifications.ID_RESTORE_COMPLETE)
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/sync/models/SyncTriggerOptions.kt

@@ -0,0 +1,63 @@
+package eu.kanade.tachiyomi.data.sync.models
+
+import dev.icerock.moko.resources.StringResource
+import kotlinx.collections.immutable.persistentListOf
+import tachiyomi.i18n.MR
+
+data class SyncTriggerOptions(
+    val syncOnChapterRead: Boolean = false,
+    val syncOnChapterOpen: Boolean = false,
+    val syncOnAppStart: Boolean = false,
+    val syncOnAppResume: Boolean = false,
+) {
+    fun asBooleanArray() = booleanArrayOf(
+        syncOnChapterRead,
+        syncOnChapterOpen,
+        syncOnAppStart,
+        syncOnAppResume,
+    )
+
+    fun anyEnabled() = syncOnChapterRead ||
+        syncOnChapterOpen ||
+        syncOnAppStart ||
+        syncOnAppResume
+
+    companion object {
+        val mainOptions = persistentListOf(
+            Entry(
+                label = MR.strings.sync_on_chapter_read,
+                getter = SyncTriggerOptions::syncOnChapterRead,
+                setter = { options, enabled -> options.copy(syncOnChapterRead = enabled) },
+            ),
+            Entry(
+                label = MR.strings.sync_on_chapter_open,
+                getter = SyncTriggerOptions::syncOnChapterOpen,
+                setter = { options, enabled -> options.copy(syncOnChapterOpen = enabled) },
+            ),
+            Entry(
+                label = MR.strings.sync_on_app_start,
+                getter = SyncTriggerOptions::syncOnAppStart,
+                setter = { options, enabled -> options.copy(syncOnAppStart = enabled) },
+            ),
+            Entry(
+                label = MR.strings.sync_on_app_resume,
+                getter = SyncTriggerOptions::syncOnAppResume,
+                setter = { options, enabled -> options.copy(syncOnAppResume = enabled) },
+            ),
+        )
+
+        fun fromBooleanArray(array: BooleanArray) = SyncTriggerOptions(
+            syncOnChapterRead = array[0],
+            syncOnChapterOpen = array[1],
+            syncOnAppStart = array[2],
+            syncOnAppResume = array[3],
+        )
+    }
+
+    data class Entry(
+        val label: StringResource,
+        val getter: (SyncTriggerOptions) -> Boolean,
+        val setter: (SyncTriggerOptions, Boolean) -> SyncTriggerOptions,
+        val enabled: (SyncTriggerOptions) -> Boolean = { true },
+    )
+}

app/src/main/java/eu/kanade/tachiyomi/data/sync/service/GoogleDriveSyncService.kt

@@ -0,0 +1,528 @@
+package eu.kanade.tachiyomi.data.sync.service
+
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import com.google.api.client.auth.oauth2.TokenResponseException
+import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow
+import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeTokenRequest
+import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets
+import com.google.api.client.googleapis.auth.oauth2.GoogleCredential
+import com.google.api.client.googleapis.auth.oauth2.GoogleTokenResponse
+import com.google.api.client.http.ByteArrayContent
+import com.google.api.client.http.javanet.NetHttpTransport
+import com.google.api.client.json.JsonFactory
+import com.google.api.client.json.jackson2.JacksonFactory
+import com.google.api.services.drive.Drive
+import com.google.api.services.drive.DriveScopes
+import com.google.api.services.drive.model.File
+import eu.kanade.domain.sync.SyncPreferences
+import kotlinx.coroutines.delay
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import logcat.LogPriority
+import logcat.logcat
+import tachiyomi.core.common.i18n.stringResource
+import tachiyomi.core.common.util.lang.withIOContext
+import tachiyomi.core.common.util.system.logcat
+import tachiyomi.i18n.MR
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.io.ByteArrayOutputStream
+import java.io.IOException
+import java.time.Instant
+import java.util.zip.GZIPInputStream
+import java.util.zip.GZIPOutputStream
+
+class GoogleDriveSyncService(context: Context, json: Json, syncPreferences: SyncPreferences) : SyncService(
+    context,
+    json,
+    syncPreferences,
+) {
+    constructor(context: Context) : this(
+        context,
+        Json {
+            encodeDefaults = true
+            ignoreUnknownKeys = true
+        },
+        Injekt.get<SyncPreferences>(),
+    )
+
+    enum class DeleteSyncDataStatus {
+        NOT_INITIALIZED,
+        NO_FILES,
+        SUCCESS,
+        ERROR,
+    }
+
+    private val appName = context.stringResource(MR.strings.app_name)
+
+    private val remoteFileName = "${appName}_sync_data.gz"
+
+    private val lockFileName = "${appName}_sync.lock"
+
+    private val googleDriveService = GoogleDriveService(context)
+
+    override suspend fun beforeSync() {
+        try {
+            googleDriveService.refreshToken()
+            val drive = googleDriveService.driveService
+                ?: throw Exception(context.stringResource(MR.strings.google_drive_not_signed_in))
+
+            var backoff = 1000L
+            var retries = 0 // Retry counter
+            val maxRetries = 10 // Maximum number of retries
+
+            while (retries < maxRetries) {
+                val lockFiles = findLockFile(drive)
+                logcat(LogPriority.DEBUG) { "Found ${lockFiles.size} lock file(s)" }
+
+                when {
+                    lockFiles.isEmpty() -> {
+                        logcat(LogPriority.DEBUG) { "No lock file found, creating a new one" }
+                        createLockFile(drive)
+                        break
+                    }
+                    lockFiles.size == 1 -> {
+                        val lockFile = lockFiles.first()
+                        val createdTime = Instant.parse(lockFile.createdTime.toString())
+                        val ageMinutes = java.time.Duration.between(createdTime, Instant.now()).toMinutes()
+                        logcat(LogPriority.DEBUG) { "Lock file age: $ageMinutes minutes" }
+                        if (ageMinutes <= 3) {
+                            logcat(LogPriority.DEBUG) { "Lock file is new, proceeding with sync" }
+                            break
+                        } else {
+                            logcat(LogPriority.DEBUG) { "Lock file is old, deleting and creating a new one" }
+                            deleteLockFile(drive)
+                            createLockFile(drive)
+                            break
+                        }
+                    }
+                    else -> {
+                        logcat(LogPriority.DEBUG) { "Multiple lock files found, applying backoff" }
+                        delay(backoff) // Apply backoff strategy
+                        backoff = (backoff * 2).coerceAtMost(16000L)
+                        logcat(LogPriority.DEBUG) { "Backoff increased to $backoff milliseconds" }
+                    }
+                }
+                retries++ // Increment retry counter
+                logcat(LogPriority.DEBUG) { "Loop iteration complete, retry count: $retries, backoff time: $backoff" }
+            }
+
+            if (retries >= maxRetries) {
+                logcat(LogPriority.ERROR) { "Max retries reached, exiting sync process" }
+                throw Exception(context.stringResource(MR.strings.error_before_sync_gdrive) + ": Max retries reached.")
+            }
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Error in GoogleDrive beforeSync" }
+            throw Exception(context.stringResource(MR.strings.error_before_sync_gdrive) + ": ${e.message}", e)
+        }
+    }
+
+    override suspend fun pullSyncData(): SyncData? {
+        val drive = googleDriveService.driveService
+
+        if (drive == null) {
+            logcat(LogPriority.DEBUG) { "Google Drive service not initialized" }
+            throw Exception(context.stringResource(MR.strings.google_drive_not_signed_in))
+        }
+
+        val fileList = getAppDataFileList(drive)
+        if (fileList.isEmpty()) {
+            logcat(LogPriority.INFO) { "No files found in app data" }
+            return null
+        }
+
+        val gdriveFileId = fileList[0].id
+        logcat(LogPriority.DEBUG) { "Google Drive File ID: $gdriveFileId" }
+
+        val outputStream = ByteArrayOutputStream()
+        try {
+            drive.files().get(gdriveFileId).executeMediaAndDownloadTo(outputStream)
+            logcat(LogPriority.DEBUG) { "File downloaded successfully" }
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Error downloading file" }
+            return null
+        }
+
+        return withIOContext {
+            try {
+                val gzipInputStream = GZIPInputStream(outputStream.toByteArray().inputStream())
+                val jsonString = gzipInputStream.bufferedReader().use { it.readText() }
+                val syncData = json.decodeFromString(SyncData.serializer(), jsonString)
+                this@GoogleDriveSyncService.logcat(LogPriority.DEBUG) { "JSON deserialized successfully" }
+                syncData
+            } catch (e: Exception) {
+                this@GoogleDriveSyncService.logcat(
+                    LogPriority.ERROR,
+                    throwable = e,
+                ) { "Failed to convert json to sync data with kotlinx.serialization" }
+                throw Exception(e.message, e)
+            }
+        }
+    }
+
+    override suspend fun pushSyncData(syncData: SyncData) {
+        val jsonData = json.encodeToString(syncData)
+        val drive = googleDriveService.driveService
+            ?: throw Exception(context.stringResource(MR.strings.google_drive_not_signed_in))
+
+        val fileList = getAppDataFileList(drive)
+        val byteArrayOutputStream = ByteArrayOutputStream()
+        withIOContext {
+            GZIPOutputStream(byteArrayOutputStream).use { gzipOutputStream ->
+                gzipOutputStream.write(jsonData.toByteArray(Charsets.UTF_8))
+            }
+            this@GoogleDriveSyncService.logcat(LogPriority.DEBUG) { "JSON serialized successfully" }
+        }
+
+        val byteArrayContent = ByteArrayContent("application/octet-stream", byteArrayOutputStream.toByteArray())
+
+        try {
+            if (fileList.isNotEmpty()) {
+                // File exists, so update it
+                val fileId = fileList[0].id
+                drive.files().update(fileId, null, byteArrayContent).execute()
+                logcat(LogPriority.DEBUG) { "Updated existing sync data file in Google Drive with file ID: $fileId" }
+            } else {
+                // File doesn't exist, so create it
+                val fileMetadata = File().apply {
+                    name = remoteFileName
+                    mimeType = "application/gzip"
+                    parents = listOf("appDataFolder")
+                }
+                val uploadedFile = drive.files().create(fileMetadata, byteArrayContent)
+                    .setFields("id")
+                    .execute()
+
+                logcat(
+                    LogPriority.DEBUG,
+                ) { "Created new sync data file in Google Drive with file ID: ${uploadedFile.id}" }
+            }
+
+            // Data has been successfully pushed or updated, delete the lock file
+            deleteLockFile(drive)
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Failed to push or update sync data" }
+            throw Exception(context.stringResource(MR.strings.error_uploading_sync_data) + ": ${e.message}", e)
+        }
+    }
+
+    private fun getAppDataFileList(drive: Drive): MutableList<File> {
+        try {
+            // Search for the existing file by name in the appData folder
+            val query = "mimeType='application/gzip' and name = '$remoteFileName'"
+            val fileList = drive.files()
+                .list()
+                .setSpaces("appDataFolder")
+                .setQ(query)
+                .setFields("files(id, name, createdTime)")
+                .execute()
+                .files
+            logcat { "AppData folder file list: $fileList" }
+
+            return fileList
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Error no sync data found in appData folder" }
+            return mutableListOf()
+        }
+    }
+
+    private fun createLockFile(drive: Drive) {
+        try {
+            val fileMetadata = File().apply {
+                name = lockFileName
+                mimeType = "text/plain"
+                parents = listOf("appDataFolder")
+            }
+
+            // Create an empty content to upload as the lock file
+            val emptyContent = ByteArrayContent.fromString("text/plain", "")
+
+            val file = drive.files().create(fileMetadata, emptyContent)
+                .setFields("id, name, createdTime")
+                .execute()
+
+            logcat { "Created lock file with ID: ${file.id}" }
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Error creating lock file" }
+            throw Exception(e.message, e)
+        }
+    }
+
+    private fun findLockFile(drive: Drive): MutableList<File> {
+        return try {
+            val query = "mimeType='text/plain' and name = '$lockFileName'"
+            val fileList = drive.files()
+                .list()
+                .setSpaces("appDataFolder")
+                .setQ(query)
+                .setFields("files(id, name, createdTime)")
+                .execute().files
+            logcat { "Lock file search result: $fileList" }
+            fileList
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Error finding lock file" }
+            mutableListOf()
+        }
+    }
+
+    private fun deleteLockFile(drive: Drive) {
+        try {
+            val lockFiles = findLockFile(drive)
+
+            if (lockFiles.isNotEmpty()) {
+                for (file in lockFiles) {
+                    drive.files().delete(file.id).execute()
+                    logcat { "Deleted lock file with ID: ${file.id}" }
+                }
+            } else {
+                logcat { "No lock file found to delete." }
+            }
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Error deleting lock file" }
+            throw Exception(context.stringResource(MR.strings.error_deleting_google_drive_lock_file), e)
+        }
+    }
+
+    suspend fun deleteSyncDataFromGoogleDrive(): DeleteSyncDataStatus {
+        val drive = googleDriveService.driveService
+
+        if (drive == null) {
+            logcat(LogPriority.ERROR) { "Google Drive service not initialized" }
+            return DeleteSyncDataStatus.NOT_INITIALIZED
+        }
+        googleDriveService.refreshToken()
+
+        return withIOContext {
+            try {
+                val appDataFileList = getAppDataFileList(drive)
+
+                if (appDataFileList.isEmpty()) {
+                    this@GoogleDriveSyncService
+                        .logcat(LogPriority.DEBUG) { "No sync data file found in appData folder of Google Drive" }
+                    DeleteSyncDataStatus.NO_FILES
+                } else {
+                    for (file in appDataFileList) {
+                        drive.files().delete(file.id).execute()
+                        this@GoogleDriveSyncService.logcat(
+                            LogPriority.DEBUG,
+                        ) { "Deleted sync data file in appData folder of Google Drive with file ID: ${file.id}" }
+                    }
+                    DeleteSyncDataStatus.SUCCESS
+                }
+            } catch (e: Exception) {
+                this@GoogleDriveSyncService.logcat(LogPriority.ERROR, throwable = e) {
+                    "Error occurred while interacting with Google Drive"
+                }
+                DeleteSyncDataStatus.ERROR
+            }
+        }
+    }
+}
+
+class GoogleDriveService(private val context: Context) {
+    var driveService: Drive? = null
+    companion object {
+        const val REDIRECT_URI = "eu.kanade.google.oauth:/oauth2redirect"
+    }
+    private val syncPreferences = Injekt.get<SyncPreferences>()
+
+    init {
+        initGoogleDriveService()
+    }
+
+    /**
+     * Initializes the Google Drive service by obtaining the access token and refresh token from the SyncPreferences
+     * and setting up the service using the obtained tokens.
+     */
+    private fun initGoogleDriveService() {
+        val accessToken = syncPreferences.googleDriveAccessToken().get()
+        val refreshToken = syncPreferences.googleDriveRefreshToken().get()
+
+        if (accessToken == "" || refreshToken == "") {
+            driveService = null
+            return
+        }
+
+        setupGoogleDriveService(accessToken, refreshToken)
+    }
+
+    /**
+     * Launches an Intent to open the user's default browser for Google Drive sign-in.
+     * The Intent carries the authorization URL, which prompts the user to sign in
+     * and grant the application permission to access their Google Drive account.
+     * @return An Intent configured to launch a browser for Google Drive OAuth sign-in.
+     */
+    fun getSignInIntent(): Intent {
+        val authorizationUrl = generateAuthorizationUrl()
+
+        return Intent(Intent.ACTION_VIEW).apply {
+            data = Uri.parse(authorizationUrl)
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+    }
+
+    /**
+     * Generates the authorization URL required for the user to grant the application
+     * permission to access their Google Drive account.
+     * Sets the approval prompt to "force" to ensure that the user is always prompted to grant access,
+     * even if they have previously granted access.
+     * @return The authorization URL.
+     */
+    private fun generateAuthorizationUrl(): String {
+        val jsonFactory: JsonFactory = JacksonFactory.getDefaultInstance()
+        val secrets = GoogleClientSecrets.load(
+            jsonFactory,
+            context.assets.open("client_secrets.json").reader(),
+        )
+
+        val flow = GoogleAuthorizationCodeFlow.Builder(
+            NetHttpTransport(),
+            jsonFactory,
+            secrets,
+            listOf(DriveScopes.DRIVE_FILE, DriveScopes.DRIVE_APPDATA),
+        ).setAccessType("offline").build()
+
+        return flow.newAuthorizationUrl()
+            .setRedirectUri(REDIRECT_URI)
+            .setApprovalPrompt("force")
+            .build()
+    }
+    internal suspend fun refreshToken() = withIOContext {
+        val refreshToken = syncPreferences.googleDriveRefreshToken().get()
+        val accessToken = syncPreferences.googleDriveAccessToken().get()
+
+        val jsonFactory: JsonFactory = JacksonFactory.getDefaultInstance()
+        val secrets = GoogleClientSecrets.load(
+            jsonFactory,
+            context.assets.open("client_secrets.json").reader(),
+        )
+
+        val credential = GoogleCredential.Builder()
+            .setJsonFactory(jsonFactory)
+            .setTransport(NetHttpTransport())
+            .setClientSecrets(secrets)
+            .build()
+
+        if (refreshToken == "") {
+            throw Exception(context.stringResource(MR.strings.google_drive_not_signed_in))
+        }
+
+        credential.refreshToken = refreshToken
+
+        this@GoogleDriveService.logcat(LogPriority.DEBUG) { "Refreshing access token with: $refreshToken" }
+
+        try {
+            credential.refreshToken()
+            val newAccessToken = credential.accessToken
+            // Save the new access token
+            syncPreferences.googleDriveAccessToken().set(newAccessToken)
+            setupGoogleDriveService(newAccessToken, credential.refreshToken)
+            this@GoogleDriveService
+                .logcat(LogPriority.DEBUG) { "Google Access token refreshed old: $accessToken new: $newAccessToken" }
+        } catch (e: TokenResponseException) {
+            if (e.details.error == "invalid_grant") {
+                // The refresh token is invalid, prompt the user to sign in again
+                this@GoogleDriveService.logcat(LogPriority.ERROR, throwable = e) {
+                    "Refresh token is invalid, prompt user to sign in again"
+                }
+                throw e.message?.let { Exception(it, e) } ?: Exception("Unknown error", e)
+            } else {
+                // Token refresh failed; handle this situation
+                this@GoogleDriveService.logcat(LogPriority.ERROR) { "Failed to refresh access token ${e.message}" }
+                this@GoogleDriveService.logcat(LogPriority.ERROR) { "Google Drive sync will be disabled" }
+                throw e.message?.let { Exception(it, e) } ?: Exception("Unknown error", e)
+            }
+        } catch (e: IOException) {
+            // Token refresh failed; handle this situation
+            this@GoogleDriveService.logcat(LogPriority.ERROR, throwable = e) { "Failed to refresh access token" }
+            this@GoogleDriveService.logcat(LogPriority.ERROR) { "Google Drive sync will be disabled" }
+            throw e.message?.let { Exception(it, e) } ?: Exception("Unknown error", e)
+        }
+    }
+
+    /**
+     * Sets up the Google Drive service using the provided access token and refresh token.
+     * @param accessToken The access token obtained from the SyncPreferences.
+     * @param refreshToken The refresh token obtained from the SyncPreferences.
+     */
+    private fun setupGoogleDriveService(accessToken: String, refreshToken: String) {
+        val jsonFactory: JsonFactory = JacksonFactory.getDefaultInstance()
+        val secrets = GoogleClientSecrets.load(
+            jsonFactory,
+            context.assets.open("client_secrets.json").reader(),
+        )
+
+        val credential = GoogleCredential.Builder()
+            .setJsonFactory(jsonFactory)
+            .setTransport(NetHttpTransport())
+            .setClientSecrets(secrets)
+            .build()
+
+        credential.accessToken = accessToken
+        credential.refreshToken = refreshToken
+
+        driveService = Drive.Builder(
+            NetHttpTransport(),
+            jsonFactory,
+            credential,
+        ).setApplicationName(context.stringResource(MR.strings.app_name))
+            .build()
+    }
+
+    /**
+     * Handles the authorization code returned after the user has granted the application permission to access their
+     * Google Drive account.
+     * It obtains the access token and refresh token using the authorization code, saves the tokens to the
+     * SyncPreferences, sets up the Google Drive service using the obtained tokens, and initializes the service.
+     * @param authorizationCode The authorization code obtained from the OAuthCallbackServer.
+     * @param activity The current activity.
+     * @param onSuccess A callback function to be called on successful authorization.
+     * @param onFailure A callback function to be called on authorization failure.
+     */
+    fun handleAuthorizationCode(
+        authorizationCode: String,
+        activity: Activity,
+        onSuccess: () -> Unit,
+        onFailure: (String) -> Unit,
+    ) {
+        val jsonFactory: JsonFactory = JacksonFactory.getDefaultInstance()
+        val secrets = GoogleClientSecrets.load(
+            jsonFactory,
+            context.assets.open("client_secrets.json").reader(),
+        )
+
+        val tokenResponse: GoogleTokenResponse = GoogleAuthorizationCodeTokenRequest(
+            NetHttpTransport(),
+            jsonFactory,
+            secrets.installed.clientId,
+            secrets.installed.clientSecret,
+            authorizationCode,
+            REDIRECT_URI,
+        ).setGrantType("authorization_code").execute()
+
+        try {
+            // Save the access token and refresh token
+            val accessToken = tokenResponse.accessToken
+            val refreshToken = tokenResponse.refreshToken
+
+            // Save the tokens to SyncPreferences
+            syncPreferences.googleDriveAccessToken().set(accessToken)
+            syncPreferences.googleDriveRefreshToken().set(refreshToken)
+
+            setupGoogleDriveService(accessToken, refreshToken)
+            initGoogleDriveService()
+
+            activity.runOnUiThread {
+                onSuccess()
+            }
+        } catch (e: Exception) {
+            logcat(LogPriority.ERROR, throwable = e) { "Failed to handle authorization code" }
+            activity.runOnUiThread {
+                onFailure(e.localizedMessage ?: "Unknown error")
+            }
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/sync/service/SyncService.kt

@@ -0,0 +1,517 @@
+package eu.kanade.tachiyomi.data.sync.service
+
+import android.content.Context
+import eu.kanade.domain.sync.SyncPreferences
+import eu.kanade.tachiyomi.data.backup.models.Backup
+import eu.kanade.tachiyomi.data.backup.models.BackupCategory
+import eu.kanade.tachiyomi.data.backup.models.BackupChapter
+import eu.kanade.tachiyomi.data.backup.models.BackupManga
+import eu.kanade.tachiyomi.data.backup.models.BackupPreference
+import eu.kanade.tachiyomi.data.backup.models.BackupSavedSearch
+import eu.kanade.tachiyomi.data.backup.models.BackupSource
+import eu.kanade.tachiyomi.data.backup.models.BackupSourcePreferences
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import logcat.LogPriority
+import logcat.logcat
+
+@Serializable
+data class SyncData(
+    val backup: Backup? = null,
+)
+
+abstract class SyncService(
+    val context: Context,
+    val json: Json,
+    val syncPreferences: SyncPreferences,
+) {
+    open suspend fun doSync(syncData: SyncData): Backup? {
+        beforeSync()
+
+        val remoteSData = pullSyncData()
+
+        val finalSyncData =
+            if (remoteSData == null) {
+                pushSyncData(syncData)
+                syncData
+            } else {
+                val mergedSyncData = mergeSyncData(syncData, remoteSData)
+                pushSyncData(mergedSyncData)
+                mergedSyncData
+            }
+
+        return finalSyncData.backup
+    }
+
+    /**
+     * For refreshing tokens and other possible operations before connecting to the remote storage
+     */
+    open suspend fun beforeSync() {}
+
+    /**
+     * Download sync data from the remote storage
+     */
+    abstract suspend fun pullSyncData(): SyncData?
+
+    /**
+     * Upload sync data to the remote storage
+     */
+    abstract suspend fun pushSyncData(syncData: SyncData)
+
+    /**
+     * Merges the local and remote sync data into a single JSON string.
+     *
+     * @param localSyncData The SData containing the local sync data.
+     * @param remoteSyncData The SData containing the remote sync data.
+     * @return The JSON string containing the merged sync data.
+     */
+    private fun mergeSyncData(localSyncData: SyncData, remoteSyncData: SyncData): SyncData {
+        val mergedMangaList = mergeMangaLists(localSyncData.backup?.backupManga, remoteSyncData.backup?.backupManga)
+        val mergedCategoriesList =
+            mergeCategoriesLists(localSyncData.backup?.backupCategories, remoteSyncData.backup?.backupCategories)
+
+        val mergedSourcesList =
+            mergeSourcesLists(localSyncData.backup?.backupSources, remoteSyncData.backup?.backupSources)
+        val mergedPreferencesList =
+            mergePreferencesLists(localSyncData.backup?.backupPreferences, remoteSyncData.backup?.backupPreferences)
+        val mergedSourcePreferencesList = mergeSourcePreferencesLists(
+            localSyncData.backup?.backupSourcePreferences,
+            remoteSyncData.backup?.backupSourcePreferences,
+        )
+
+        // SY -->
+        val mergedSavedSearchesList = mergeSavedSearchesLists(
+            localSyncData.backup?.backupSavedSearches,
+            remoteSyncData.backup?.backupSavedSearches,
+        )
+        // SY <--
+
+        // Create the merged Backup object
+        val mergedBackup = Backup(
+            backupManga = mergedMangaList,
+            backupCategories = mergedCategoriesList,
+            backupSources = mergedSourcesList,
+            backupPreferences = mergedPreferencesList,
+            backupSourcePreferences = mergedSourcePreferencesList,
+
+            // SY -->
+            backupSavedSearches = mergedSavedSearchesList,
+            // SY <--
+        )
+
+        // Create the merged SData object
+        return SyncData(
+            backup = mergedBackup,
+        )
+    }
+
+    /**
+     * Merges two lists of BackupManga objects, selecting the most recent manga based on the lastModifiedAt value.
+     * If lastModifiedAt is null for a manga, it treats that manga as the oldest possible for comparison purposes.
+     * This function is designed to reconcile local and remote manga lists, ensuring the most up-to-date manga is retained.
+     *
+     * @param localMangaList The list of local BackupManga objects or null.
+     * @param remoteMangaList The list of remote BackupManga objects or null.
+     * @return A list of BackupManga objects, each representing the most recent version of the manga from either local or remote sources.
+     */
+    private fun mergeMangaLists(
+        localMangaList: List<BackupManga>?,
+        remoteMangaList: List<BackupManga>?,
+    ): List<BackupManga> {
+        val logTag = "MergeMangaLists"
+
+        val localMangaListSafe = localMangaList.orEmpty()
+        val remoteMangaListSafe = remoteMangaList.orEmpty()
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting merge. Local list size: ${localMangaListSafe.size}, Remote list size: ${remoteMangaListSafe.size}"
+        }
+
+        fun mangaCompositeKey(manga: BackupManga): String {
+            return "${manga.source}|${manga.url}|${manga.title.lowercase().trim()}|${manga.author?.lowercase()?.trim()}"
+        }
+
+        // Create maps using composite keys
+        val localMangaMap = localMangaListSafe.associateBy { mangaCompositeKey(it) }
+        val remoteMangaMap = remoteMangaListSafe.associateBy { mangaCompositeKey(it) }
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting merge. Local list size: ${localMangaListSafe.size}, Remote list size: ${remoteMangaListSafe.size}"
+        }
+
+        val mergedList = (localMangaMap.keys + remoteMangaMap.keys).distinct().mapNotNull { compositeKey ->
+            val local = localMangaMap[compositeKey]
+            val remote = remoteMangaMap[compositeKey]
+
+            // New version comparison logic
+            when {
+                local != null && remote == null -> local
+                local == null && remote != null -> remote
+                local != null && remote != null -> {
+                    // Compare versions to decide which manga to keep
+                    if (local.version >= remote.version) {
+                        logcat(LogPriority.DEBUG, logTag) {
+                            "Keeping local version of ${local.title} with merged chapters."
+                        }
+                        local.copy(chapters = mergeChapters(local.chapters, remote.chapters))
+                    } else {
+                        logcat(LogPriority.DEBUG, logTag) {
+                            "Keeping remote version of ${remote.title} with merged chapters."
+                        }
+                        remote.copy(chapters = mergeChapters(local.chapters, remote.chapters))
+                    }
+                }
+                else -> null // No manga found for key
+            }
+        }
+
+        // Counting favorites and non-favorites
+        val (favorites, nonFavorites) = mergedList.partition { it.favorite }
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Merge completed. Total merged manga: ${mergedList.size}, Favorites: ${favorites.size}, " +
+                "Non-Favorites: ${nonFavorites.size}"
+        }
+
+        return mergedList
+    }
+
+/**
+     * Merges two lists of BackupChapter objects, selecting the most recent chapter based on the lastModifiedAt value.
+     * If lastModifiedAt is null for a chapter, it treats that chapter as the oldest possible for comparison purposes.
+     * This function is designed to reconcile local and remote chapter lists, ensuring the most up-to-date chapter is retained.
+     *
+     * @param localChapters The list of local BackupChapter objects.
+     * @param remoteChapters The list of remote BackupChapter objects.
+     * @return A list of BackupChapter objects, each representing the most recent version of the chapter from either local or remote sources.
+     *
+     * - This function is used in scenarios where local and remote chapter lists need to be synchronized.
+     * - It iterates over the union of the URLs from both local and remote chapters.
+     * - For each URL, it compares the corresponding local and remote chapters based on the lastModifiedAt value.
+     * - If only one source (local or remote) has the chapter for a URL, that chapter is used.
+     * - If both sources have the chapter, the one with the more recent lastModifiedAt value is chosen.
+     * - If lastModifiedAt is null or missing, the chapter is considered the oldest for safety, ensuring that any chapter with a valid timestamp is preferred.
+     * - The resulting list contains the most recent chapters from the combined set of local and remote chapters.
+     */
+    private fun mergeChapters(
+        localChapters: List<BackupChapter>,
+        remoteChapters: List<BackupChapter>,
+    ): List<BackupChapter> {
+        val logTag = "MergeChapters"
+
+        fun chapterCompositeKey(chapter: BackupChapter): String {
+            return "${chapter.url}|${chapter.name}|${chapter.chapterNumber}"
+        }
+
+        val localChapterMap = localChapters.associateBy { chapterCompositeKey(it) }
+        val remoteChapterMap = remoteChapters.associateBy { chapterCompositeKey(it) }
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting chapter merge. Local chapters: ${localChapters.size}, Remote chapters: ${remoteChapters.size}"
+        }
+
+        // Merge both chapter maps based on version numbers
+        val mergedChapters = (localChapterMap.keys + remoteChapterMap.keys).distinct().mapNotNull { compositeKey ->
+            val localChapter = localChapterMap[compositeKey]
+            val remoteChapter = remoteChapterMap[compositeKey]
+
+            logcat(LogPriority.DEBUG, logTag) {
+                "Processing chapter key: $compositeKey. Local chapter: ${localChapter != null}, " +
+                    "Remote chapter: ${remoteChapter != null}"
+            }
+
+            when {
+                localChapter != null && remoteChapter == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Keeping local chapter: ${localChapter.name}." }
+                    localChapter
+                }
+                localChapter == null && remoteChapter != null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Taking remote chapter: ${remoteChapter.name}." }
+                    remoteChapter
+                }
+                localChapter != null && remoteChapter != null -> {
+                    // Use version number to decide which chapter to keep
+                    val chosenChapter = if (localChapter.version >= remoteChapter.version) {
+                        localChapter
+                    } else {
+                        remoteChapter
+                    }
+                    logcat(LogPriority.DEBUG, logTag) {
+                        "Merging chapter: ${chosenChapter.name}. Chosen version from: ${
+                            if (localChapter.version >= remoteChapter.version) "Local" else "Remote"
+                        }, Local version: ${localChapter.version}, Remote version: ${remoteChapter.version}."
+                    }
+                    chosenChapter
+                }
+                else -> {
+                    logcat(LogPriority.DEBUG, logTag) {
+                        "No chapter found for composite key: $compositeKey. Skipping."
+                    }
+                    null
+                }
+            }
+        }
+
+        logcat(LogPriority.DEBUG, logTag) { "Chapter merge completed. Total merged chapters: ${mergedChapters.size}" }
+
+        return mergedChapters
+    }
+
+    /**
+     * Merges two lists of SyncCategory objects, prioritizing the category with the most recent order value.
+     *
+     * @param localCategoriesList The list of local SyncCategory objects.
+     * @param remoteCategoriesList The list of remote SyncCategory objects.
+     * @return The merged list of SyncCategory objects.
+     */
+    private fun mergeCategoriesLists(
+        localCategoriesList: List<BackupCategory>?,
+        remoteCategoriesList: List<BackupCategory>?,
+    ): List<BackupCategory> {
+        if (localCategoriesList == null) return remoteCategoriesList ?: emptyList()
+        if (remoteCategoriesList == null) return localCategoriesList
+        val localCategoriesMap = localCategoriesList.associateBy { it.name }
+        val remoteCategoriesMap = remoteCategoriesList.associateBy { it.name }
+
+        val mergedCategoriesMap = mutableMapOf<String, BackupCategory>()
+
+        localCategoriesMap.forEach { (name, localCategory) ->
+            val remoteCategory = remoteCategoriesMap[name]
+            if (remoteCategory != null) {
+                // Compare and merge local and remote categories
+                val mergedCategory = if (localCategory.order > remoteCategory.order) {
+                    localCategory
+                } else {
+                    remoteCategory
+                }
+                mergedCategoriesMap[name] = mergedCategory
+            } else {
+                // If the category is only in the local list, add it to the merged list
+                mergedCategoriesMap[name] = localCategory
+            }
+        }
+
+        // Add any categories from the remote list that are not in the local list
+        remoteCategoriesMap.forEach { (name, remoteCategory) ->
+            if (!mergedCategoriesMap.containsKey(name)) {
+                mergedCategoriesMap[name] = remoteCategory
+            }
+        }
+
+        return mergedCategoriesMap.values.toList()
+    }
+
+    private fun mergeSourcesLists(
+        localSources: List<BackupSource>?,
+        remoteSources: List<BackupSource>?
+    ): List<BackupSource> {
+        val logTag = "MergeSources"
+
+        // Create maps using sourceId as key
+        val localSourceMap = localSources?.associateBy { it.sourceId } ?: emptyMap()
+        val remoteSourceMap = remoteSources?.associateBy { it.sourceId } ?: emptyMap()
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting source merge. Local sources: ${localSources?.size}, Remote sources: ${remoteSources?.size}"
+        }
+
+        // Merge both source maps
+        val mergedSources = (localSourceMap.keys + remoteSourceMap.keys).distinct().mapNotNull { sourceId ->
+            val localSource = localSourceMap[sourceId]
+            val remoteSource = remoteSourceMap[sourceId]
+
+            logcat(LogPriority.DEBUG, logTag) {
+                "Processing source ID: $sourceId. Local source: ${localSource != null}, " +
+                    "Remote source: ${remoteSource != null}"
+            }
+
+            when {
+                localSource != null && remoteSource == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Using local source: ${localSource.name}." }
+                    localSource
+                }
+                remoteSource != null && localSource == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Using remote source: ${remoteSource.name}." }
+                    remoteSource
+                }
+                else -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Remote and local is not empty: $sourceId. Skipping." }
+                    null
+                }
+            }
+        }
+
+        logcat(LogPriority.DEBUG, logTag) { "Source merge completed. Total merged sources: ${mergedSources.size}" }
+
+        return mergedSources
+    }
+
+    private fun mergePreferencesLists(
+        localPreferences: List<BackupPreference>?,
+        remotePreferences: List<BackupPreference>?
+    ): List<BackupPreference> {
+        val logTag = "MergePreferences"
+
+        // Create maps using key as the unique identifier
+        val localPreferencesMap = localPreferences?.associateBy { it.key } ?: emptyMap()
+        val remotePreferencesMap = remotePreferences?.associateBy { it.key } ?: emptyMap()
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting preferences merge. Local preferences: ${localPreferences?.size}, " +
+                "Remote preferences: ${remotePreferences?.size}"
+        }
+
+        // Merge both preferences maps
+        val mergedPreferences = (localPreferencesMap.keys + remotePreferencesMap.keys).distinct().mapNotNull { key ->
+            val localPreference = localPreferencesMap[key]
+            val remotePreference = remotePreferencesMap[key]
+
+            logcat(LogPriority.DEBUG, logTag) {
+                "Processing preference key: $key. Local preference: ${localPreference != null}, " +
+                    "Remote preference: ${remotePreference != null}"
+            }
+
+            when {
+                localPreference != null && remotePreference == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Using local preference: ${localPreference.key}." }
+                    localPreference
+                }
+                remotePreference != null && localPreference == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Using remote preference: ${remotePreference.key}." }
+                    remotePreference
+                }
+                else -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Both remote and local have keys. Skipping: $key" }
+                    null
+                }
+            }
+        }
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Preferences merge completed. Total merged preferences: ${mergedPreferences.size}"
+        }
+
+        return mergedPreferences
+    }
+
+    private fun mergeSourcePreferencesLists(
+        localPreferences: List<BackupSourcePreferences>?,
+        remotePreferences: List<BackupSourcePreferences>?
+    ): List<BackupSourcePreferences> {
+        val logTag = "MergeSourcePreferences"
+
+        // Create maps using sourceKey as the unique identifier
+        val localPreferencesMap = localPreferences?.associateBy { it.sourceKey } ?: emptyMap()
+        val remotePreferencesMap = remotePreferences?.associateBy { it.sourceKey } ?: emptyMap()
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting source preferences merge. Local source preferences: ${localPreferences?.size}, " +
+                "Remote source preferences: ${remotePreferences?.size}"
+        }
+
+        // Merge both source preferences maps
+        val mergedSourcePreferences = (localPreferencesMap.keys + remotePreferencesMap.keys).distinct().mapNotNull { sourceKey ->
+            val localSourcePreference = localPreferencesMap[sourceKey]
+            val remoteSourcePreference = remotePreferencesMap[sourceKey]
+
+            logcat(LogPriority.DEBUG, logTag) {
+                "Processing source preference key: $sourceKey. " +
+                    "Local source preference: ${localSourcePreference != null}, " +
+                    "Remote source preference: ${remoteSourcePreference != null}"
+            }
+
+            when {
+                localSourcePreference != null && remoteSourcePreference == null -> {
+                    logcat(LogPriority.DEBUG, logTag) {
+                        "Using local source preference: ${localSourcePreference.sourceKey}."
+                    }
+                    localSourcePreference
+                }
+                remoteSourcePreference != null && localSourcePreference == null -> {
+                    logcat(LogPriority.DEBUG, logTag) {
+                        "Using remote source preference: ${remoteSourcePreference.sourceKey}."
+                    }
+                    remoteSourcePreference
+                }
+                localSourcePreference != null && remoteSourcePreference != null -> {
+                    // Merge the individual preferences within the source preferences
+                    val mergedPrefs =
+                        mergeIndividualPreferences(localSourcePreference.prefs, remoteSourcePreference.prefs)
+                    BackupSourcePreferences(sourceKey, mergedPrefs)
+                }
+                else -> null
+            }
+        }
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Source preferences merge completed. Total merged source preferences: ${mergedSourcePreferences.size}"
+        }
+
+        return mergedSourcePreferences
+    }
+
+    private fun mergeIndividualPreferences(
+        localPrefs: List<BackupPreference>,
+        remotePrefs: List<BackupPreference>
+    ): List<BackupPreference> {
+        val mergedPrefsMap = (localPrefs + remotePrefs).associateBy { it.key }
+        return mergedPrefsMap.values.toList()
+    }
+
+    // SY -->
+    private fun mergeSavedSearchesLists(
+        localSearches: List<BackupSavedSearch>?,
+        remoteSearches: List<BackupSavedSearch>?
+    ): List<BackupSavedSearch> {
+        val logTag = "MergeSavedSearches"
+
+        // Define a function to create a composite key from a BackupSavedSearch
+        fun searchCompositeKey(search: BackupSavedSearch): String {
+            return "${search.name}|${search.source}"
+        }
+
+        // Create maps using the composite key
+        val localSearchMap = localSearches?.associateBy { searchCompositeKey(it) } ?: emptyMap()
+        val remoteSearchMap = remoteSearches?.associateBy { searchCompositeKey(it) } ?: emptyMap()
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Starting saved searches merge. Local saved searches: ${localSearches?.size}, " +
+                "Remote saved searches: ${remoteSearches?.size}"
+        }
+
+        // Merge both saved searches maps
+        val mergedSearches = (localSearchMap.keys + remoteSearchMap.keys).distinct().mapNotNull { compositeKey ->
+            val localSearch = localSearchMap[compositeKey]
+            val remoteSearch = remoteSearchMap[compositeKey]
+
+            logcat(LogPriority.DEBUG, logTag) {
+                "Processing saved search key: $compositeKey. Local search: ${localSearch != null}, " +
+                    "Remote search: ${remoteSearch != null}"
+            }
+
+            when {
+                localSearch != null && remoteSearch == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Using local saved search: ${localSearch.name}." }
+                    localSearch
+                }
+                remoteSearch != null && localSearch == null -> {
+                    logcat(LogPriority.DEBUG, logTag) { "Using remote saved search: ${remoteSearch.name}." }
+                    remoteSearch
+                }
+                else -> {
+                    logcat(LogPriority.DEBUG, logTag) {
+                        "No saved search found for composite key: $compositeKey. Skipping."
+                    }
+                    null
+                }
+            }
+        }
+
+        logcat(LogPriority.DEBUG, logTag) {
+            "Saved searches merge completed. Total merged saved searches: ${mergedSearches.size}"
+        }
+
+        return mergedSearches
+    }
+    // SY <--
+}

app/src/main/java/eu/kanade/tachiyomi/data/sync/service/SyncYomiSyncService.kt

@@ -0,0 +1,198 @@
+package eu.kanade.tachiyomi.data.sync.service
+
+import android.content.Context
+import eu.kanade.domain.sync.SyncPreferences
+import eu.kanade.tachiyomi.data.sync.SyncNotifier
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.network.PATCH
+import eu.kanade.tachiyomi.network.POST
+import eu.kanade.tachiyomi.network.await
+import kotlinx.coroutines.delay
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import logcat.LogPriority
+import okhttp3.Headers
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.OkHttpClient
+import okhttp3.RequestBody.Companion.gzip
+import okhttp3.RequestBody.Companion.toRequestBody
+import tachiyomi.core.common.util.system.logcat
+import java.util.concurrent.TimeUnit
+
+class SyncYomiSyncService(
+    context: Context,
+    json: Json,
+    syncPreferences: SyncPreferences,
+    private val notifier: SyncNotifier,
+) : SyncService(context, json, syncPreferences) {
+
+    @Serializable
+    enum class SyncStatus {
+        @SerialName("pending")
+        Pending,
+
+        @SerialName("syncing")
+        Syncing,
+
+        @SerialName("success")
+        Success,
+    }
+
+    @Serializable
+    data class LockFile(
+        @SerialName("id")
+        val id: Int?,
+        @SerialName("user_api_key")
+        val userApiKey: String?,
+        @SerialName("acquired_by")
+        val acquiredBy: String?,
+        @SerialName("last_synced")
+        val lastSynced: String?,
+        @SerialName("status")
+        val status: SyncStatus,
+        @SerialName("acquired_at")
+        val acquiredAt: String?,
+        @SerialName("expires_at")
+        val expiresAt: String?,
+    )
+
+    @Serializable
+    data class LockfileCreateRequest(
+        @SerialName("acquired_by")
+        val acquiredBy: String,
+    )
+
+    @Serializable
+    data class LockfilePatchRequest(
+        @SerialName("user_api_key")
+        val userApiKey: String,
+        @SerialName("acquired_by")
+        val acquiredBy: String,
+    )
+
+    override suspend fun beforeSync() {
+        val host = syncPreferences.clientHost().get()
+        val apiKey = syncPreferences.clientAPIKey().get()
+        val lockFileApi = "$host/api/sync/lock"
+        val deviceId = syncPreferences.uniqueDeviceID()
+        val client = OkHttpClient()
+        val headers = Headers.Builder().add("X-API-Token", apiKey).build()
+        val json = Json { ignoreUnknownKeys = true }
+
+        val createLockfileRequest = LockfileCreateRequest(deviceId)
+        val createLockfileJson = json.encodeToString(createLockfileRequest)
+
+        val patchRequest = LockfilePatchRequest(apiKey, deviceId)
+        val patchJson = json.encodeToString(patchRequest)
+
+        val lockFileRequest = GET(
+            url = lockFileApi,
+            headers = headers,
+        )
+
+        val lockFileCreate = POST(
+            url = lockFileApi,
+            headers = headers,
+            body = createLockfileJson.toRequestBody("application/json; charset=utf-8".toMediaTypeOrNull()),
+        )
+
+        val lockFileUpdate = PATCH(
+            url = lockFileApi,
+            headers = headers,
+            body = patchJson.toRequestBody("application/json; charset=utf-8".toMediaTypeOrNull()),
+        )
+
+        // create lock file first
+        client.newCall(lockFileCreate).await()
+        // update lock file acquired_by
+        client.newCall(lockFileUpdate).await()
+
+        var backoff = 2000L // Start with 2 seconds
+        val maxBackoff = 32000L // Maximum backoff time e.g., 32 seconds
+        var lockFile: LockFile
+        do {
+            val response = client.newCall(lockFileRequest).await()
+            val responseBody = response.body.string()
+            lockFile = json.decodeFromString<LockFile>(responseBody)
+            logcat(LogPriority.DEBUG) { "SyncYomi lock file status: ${lockFile.status}" }
+
+            if (lockFile.status != SyncStatus.Success) {
+                logcat(LogPriority.DEBUG) { "Lock file not ready, retrying in $backoff ms..." }
+                delay(backoff)
+                backoff = (backoff * 2).coerceAtMost(maxBackoff)
+            }
+        } while (lockFile.status != SyncStatus.Success)
+
+        // update lock file acquired_by
+        client.newCall(lockFileUpdate).await()
+    }
+
+    override suspend fun pullSyncData(): SyncData? {
+        val host = syncPreferences.clientHost().get()
+        val apiKey = syncPreferences.clientAPIKey().get()
+        val downloadUrl = "$host/api/sync/download"
+
+        val client = OkHttpClient()
+        val headers = Headers.Builder().add("X-API-Token", apiKey).build()
+
+        val downloadRequest = GET(
+            url = downloadUrl,
+            headers = headers,
+        )
+
+        val response = client.newCall(downloadRequest).await()
+        val responseBody = response.body.string()
+
+        return if (response.isSuccessful) {
+            json.decodeFromString<SyncData>(responseBody)
+        } else {
+            notifier.showSyncError("Failed to download sync data: $responseBody")
+            responseBody.let { logcat(LogPriority.ERROR) { "SyncError:$it" } }
+            null
+        }
+    }
+
+    override suspend fun pushSyncData(syncData: SyncData) {
+        val host = syncPreferences.clientHost().get()
+        val apiKey = syncPreferences.clientAPIKey().get()
+        val uploadUrl = "$host/api/sync/upload"
+        val timeout = 30L
+
+        // Set timeout to 30 seconds
+        val client = OkHttpClient.Builder()
+            .connectTimeout(timeout, TimeUnit.SECONDS)
+            .readTimeout(timeout, TimeUnit.SECONDS)
+            .writeTimeout(timeout, TimeUnit.SECONDS)
+            .build()
+
+        val headers = Headers.Builder().add(
+            "Content-Type",
+            "application/gzip",
+        ).add("Content-Encoding", "gzip").add("X-API-Token", apiKey).build()
+
+        val mediaType = "application/gzip".toMediaTypeOrNull()
+
+        val jsonData = json.encodeToString(syncData)
+        val body = jsonData.toRequestBody(mediaType).gzip()
+
+        val uploadRequest = POST(
+            url = uploadUrl,
+            headers = headers,
+            body = body,
+        )
+
+        client.newCall(uploadRequest).await().use {
+            if (it.isSuccessful) {
+                logcat(
+                    LogPriority.DEBUG,
+                ) { "SyncYomi sync completed!" }
+            } else {
+                val responseBody = it.body.string()
+                notifier.showSyncError("Failed to upload sync data: $responseBody")
+                responseBody.let { logcat(LogPriority.ERROR) { "SyncError:$it" } }
+            }
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/track/anilist/AnilistInterceptor.kt

@@ -41,7 +41,7 @@ class AnilistInterceptor(val anilist: Anilist, private var token: String?) : Int
         // Add the authorization header to the original request.
         val authRequest = originalRequest.newBuilder()
             .addHeader("Authorization", "Bearer ${oauth!!.access_token}")
-            .header("User-Agent", "TachiyomiSY v${BuildConfig.VERSION_NAME} (${BuildConfig.APPLICATION_ID})")
+            .header("User-Agent", "TachiSY v${BuildConfig.VERSION_NAME} (${BuildConfig.APPLICATION_ID})")
             .build()
 
         return chain.proceed(authRequest)

app/src/main/java/eu/kanade/tachiyomi/di/AppModule.kt

@@ -17,6 +17,7 @@ import eu.kanade.tachiyomi.data.download.DownloadCache
 import eu.kanade.tachiyomi.data.download.DownloadManager
 import eu.kanade.tachiyomi.data.download.DownloadProvider
 import eu.kanade.tachiyomi.data.saver.ImageSaver
+import eu.kanade.tachiyomi.data.sync.service.GoogleDriveService
 import eu.kanade.tachiyomi.data.track.TrackerManager
 import eu.kanade.tachiyomi.extension.ExtensionManager
 import eu.kanade.tachiyomi.network.JavaScriptEngine
@@ -185,5 +186,7 @@ class AppModule(val app: Application) : InjektModule {
             get<GetCustomMangaInfo>()
             // SY <--
         }
+
+        addSingletonFactory { GoogleDriveService(app) }
     }
 }

app/src/main/java/eu/kanade/tachiyomi/di/PreferenceModule.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.di
 import android.app.Application
 import eu.kanade.domain.base.BasePreferences
 import eu.kanade.domain.source.service.SourcePreferences
+import eu.kanade.domain.sync.SyncPreferences
 import eu.kanade.domain.track.service.TrackPreferences
 import eu.kanade.domain.ui.UiPreferences
 import eu.kanade.tachiyomi.core.security.SecurityPreferences
@@ -66,5 +67,9 @@ class PreferenceModule(val app: Application) : InjektModule {
         addSingletonFactory {
             BasePreferences(app, get())
         }
+
+        addSingletonFactory {
+            SyncPreferences(get())
+        }
     }
 }

app/src/main/java/eu/kanade/tachiyomi/extension/ExtensionManager.kt

@@ -26,6 +26,7 @@ import kotlinx.coroutines.async
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.emptyFlow
 import kotlinx.coroutines.flow.map
@@ -53,8 +54,10 @@ class ExtensionManager(
     private val trustExtension: TrustExtension = Injekt.get(),
 ) {
 
-    var isInitialized = false
+    // SY -->
-        private set
+    private val _isInitialized = MutableStateFlow(false)
+    val isInitialized: StateFlow<Boolean> = _isInitialized.asStateFlow()
+    // SY <--
 
     /**
      * API where all the available extensions can be found.
@@ -135,9 +138,9 @@ class ExtensionManager(
             .map { it.extension }
             // SY -->
             .filterNotBlacklisted()
-        // SY <--
 
-        isInitialized = true
+        _isInitialized.value = true
+        // SY <--
     }
 
     // EXH -->

app/src/main/java/eu/kanade/tachiyomi/extension/installer/ShizukuInstaller.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.extension.installer
 import android.app.Service
 import android.content.pm.PackageManager
 import android.os.Build
+import android.os.Process
 import eu.kanade.tachiyomi.extension.model.InstallStep
 import eu.kanade.tachiyomi.util.system.getUriSize
 import eu.kanade.tachiyomi.util.system.toast
@@ -51,7 +52,8 @@ class ShizukuInstaller(private val service: Service) : Installer(service) {
                 val size = service.getUriSize(entry.uri) ?: throw IllegalStateException()
                 service.contentResolver.openInputStream(entry.uri)!!.use {
                     val createCommand = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-                        "pm install-create --user current -r -i ${service.packageName} -S $size"
+                        val userId = Process.myUserHandle().hashCode()
+                        "pm install-create --user $userId -r -i ${service.packageName} -S $size"
                     } else {
                         "pm install-create -r -i ${service.packageName} -S $size"
                     }

app/src/main/java/eu/kanade/tachiyomi/source/AndroidSourceManager.kt

@@ -29,6 +29,8 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.map
@@ -103,6 +105,7 @@ class AndroidSourceManager(
                         }
                     }
                     sourcesMapFlow.value = mutableMap
+                    _isInitialized.value = true
                 }
         }
 
@@ -186,6 +189,9 @@ class AndroidSourceManager(
     }
 
     // SY -->
+    private val _isInitialized = MutableStateFlow(false)
+    override val isInitialized: StateFlow<Boolean> = _isInitialized.asStateFlow()
+
     override fun getVisibleOnlineSources() = sourcesMapFlow.value.values
         .filterIsInstance<HttpSource>()
         .filter {

app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/details/SourcePreferencesScreen.kt

@@ -39,8 +39,10 @@ import eu.kanade.tachiyomi.source.ConfigurableSource
 import eu.kanade.tachiyomi.source.sourcePreferences
 import eu.kanade.tachiyomi.widget.TachiyomiTextInputEditText.Companion.setIncognito
 import exh.source.EnhancedHttpSource
+import exh.ui.ifSourcesLoaded
 import tachiyomi.domain.source.service.SourceManager
 import tachiyomi.presentation.core.components.material.Scaffold
+import tachiyomi.presentation.core.screens.LoadingScreen
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 
@@ -48,6 +50,11 @@ class SourcePreferencesScreen(val sourceId: Long) : Screen() {
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val context = LocalContext.current
         val navigator = LocalNavigator.currentOrThrow
 
@@ -130,7 +137,7 @@ class SourcePreferencesFragment : PreferenceFragmentCompat() {
         // SY -->
         val source = Injekt.get<SourceManager>()
             .getOrStub(sourceId)
-            ?.let { source ->
+            .let { source ->
                 if (source is EnhancedHttpSource) {
                     if (source.enhancedSource is ConfigurableSource) {
                         source.source()
@@ -141,7 +148,6 @@ class SourcePreferencesFragment : PreferenceFragmentCompat() {
                     source
                 }
             }
-            ?: throw NullPointerException("source = null, SOURCE_ID = $SOURCE_ID")
         // SY <--
         val sourceScreen = preferenceManager.createPreferenceScreen(requireContext())
 

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/search/SourceSearchScreen.kt

@@ -22,10 +22,12 @@ import eu.kanade.tachiyomi.ui.browse.source.browse.BrowseSourceScreenModel
 import eu.kanade.tachiyomi.ui.browse.source.browse.SourceFilterDialog
 import eu.kanade.tachiyomi.ui.manga.MangaScreen
 import eu.kanade.tachiyomi.ui.webview.WebViewScreen
+import exh.ui.ifSourcesLoaded
 import kotlinx.collections.immutable.persistentListOf
 import tachiyomi.core.common.Constants
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.presentation.core.components.material.Scaffold
+import tachiyomi.presentation.core.screens.LoadingScreen
 import tachiyomi.source.local.LocalSource
 
 data class SourceSearchScreen(
@@ -36,6 +38,11 @@ data class SourceSearchScreen(
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val uriHandler = LocalUriHandler.current
         val navigator = LocalNavigator.currentOrThrow
 

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/BrowseSourceScreen.kt

@@ -56,6 +56,7 @@ import eu.kanade.tachiyomi.ui.manga.MangaScreen
 import eu.kanade.tachiyomi.ui.webview.WebViewScreen
 import eu.kanade.tachiyomi.util.system.toast
 import exh.md.follows.MangaDexFollowsScreen
+import exh.ui.ifSourcesLoaded
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.receiveAsFlow
@@ -66,6 +67,7 @@ import tachiyomi.i18n.MR
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.components.material.padding
 import tachiyomi.presentation.core.i18n.stringResource
+import tachiyomi.presentation.core.screens.LoadingScreen
 import tachiyomi.source.local.LocalSource
 
 data class BrowseSourceScreen(
@@ -84,6 +86,11 @@ data class BrowseSourceScreen(
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val screenModel = rememberScreenModel {
             BrowseSourceScreenModel(
                 sourceId = sourceId,

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/feed/SourceFeedScreen.kt

@@ -19,15 +19,22 @@ import eu.kanade.tachiyomi.ui.browse.source.browse.SourceFilterDialog
 import eu.kanade.tachiyomi.ui.manga.MangaScreen
 import eu.kanade.tachiyomi.util.system.toast
 import exh.md.follows.MangaDexFollowsScreen
+import exh.ui.ifSourcesLoaded
 import exh.util.nullIfBlank
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.domain.source.interactor.GetRemoteManga
 import tachiyomi.domain.source.model.SavedSearch
+import tachiyomi.presentation.core.screens.LoadingScreen
 
 class SourceFeedScreen(val sourceId: Long) : Screen() {
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val screenModel = rememberScreenModel { SourceFeedScreenModel(sourceId) }
         val state by screenModel.state.collectAsState()
         val navigator = LocalNavigator.currentOrThrow

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/globalsearch/GlobalSearchScreen.kt

@@ -14,6 +14,7 @@ import eu.kanade.presentation.browse.GlobalSearchScreen
 import eu.kanade.presentation.util.Screen
 import eu.kanade.tachiyomi.ui.browse.source.browse.BrowseSourceScreen
 import eu.kanade.tachiyomi.ui.manga.MangaScreen
+import exh.ui.ifSourcesLoaded
 import tachiyomi.presentation.core.screens.LoadingScreen
 
 class GlobalSearchScreen(
@@ -23,6 +24,11 @@ class GlobalSearchScreen(
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val navigator = LocalNavigator.currentOrThrow
 
         val screenModel = rememberScreenModel {

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryScreenModel.kt

@@ -750,6 +750,24 @@ class LibraryScreenModel(
             clearSelection()
         }
     }
+
+    fun resetInfo() {
+        state.value.selection.fastForEach { (manga) ->
+            val mangaInfo = CustomMangaInfo(
+                id = manga.id,
+                title = null,
+                author = null,
+                artist = null,
+                thumbnailUrl = null,
+                description = null,
+                genre = null,
+                status = null,
+            )
+
+            setCustomMangaInfo.set(mangaInfo)
+        }
+        clearSelection()
+    }
     // SY <--
 
     /**
@@ -1336,6 +1354,18 @@ class LibraryScreenModel(
         val showAddToMangadex: Boolean by lazy {
             selection.any { it.manga.source in mangaDexSourceIds }
         }
+
+        val showResetInfo: Boolean by lazy {
+            selection.fastAny { (manga) ->
+                manga.title != manga.ogTitle ||
+                    manga.author != manga.ogAuthor ||
+                    manga.artist != manga.ogArtist ||
+                    manga.thumbnailUrl != manga.ogThumbnailUrl ||
+                    manga.description != manga.ogDescription ||
+                    manga.genre != manga.ogGenre ||
+                    manga.status != manga.ogStatus
+            }
+        }
         // SY <--
 
         fun getLibraryItemsByCategoryId(categoryId: Long): List<LibraryItem>? {

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryTab.kt

@@ -41,6 +41,7 @@ import eu.kanade.presentation.more.onboarding.GETTING_STARTED_URL
 import eu.kanade.presentation.util.Tab
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.library.LibraryUpdateJob
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
 import eu.kanade.tachiyomi.ui.browse.migration.advanced.design.PreMigrationScreen
 import eu.kanade.tachiyomi.ui.browse.source.globalsearch.GlobalSearchScreen
 import eu.kanade.tachiyomi.ui.category.CategoryScreen
@@ -162,6 +163,13 @@ object LibraryTab : Tab {
                             }
                         }
                     },
+                    onClickSyncNow = {
+                        if (!SyncDataJob.isAnyJobRunning(context)) {
+                            SyncDataJob.startNow(context)
+                        } else {
+                            context.toast(MR.strings.sync_in_progress)
+                        }
+                    },
                     // SY -->
                     onClickSyncExh = screenModel::openFavoritesSyncDialog.takeIf { state.showSyncExh },
                     // SY <--
@@ -197,6 +205,7 @@ object LibraryTab : Tab {
                         }
                     },
                     onClickAddToMangaDex = screenModel::syncMangaToDex.takeIf { state.showAddToMangadex },
+                    onClickResetInfo = screenModel::resetInfo.takeIf { state.showResetInfo },
                     // SY <--
                 )
             },

app/src/main/java/eu/kanade/tachiyomi/ui/manga/EditMangaDialog.kt

@@ -201,6 +201,7 @@ private fun onViewCreated(manga: Manga, context: Context, binding: EditMangaDial
     binding.mangaGenresTags.clearFocus()
 
     binding.resetTags.setOnClickListener { resetTags(manga, binding, scope) }
+    binding.resetInfo.setOnClickListener { resetInfo(manga, binding, scope) }
 }
 
 private fun resetTags(manga: Manga, binding: EditMangaDialogBinding, scope: CoroutineScope) {
@@ -217,6 +218,15 @@ private fun loadCover(manga: Manga, context: Context, binding: EditMangaDialogBi
     }
 }
 
+private fun resetInfo(manga: Manga, binding: EditMangaDialogBinding, scope: CoroutineScope) {
+    binding.title.setText("")
+    binding.mangaAuthor.setText("")
+    binding.mangaArtist.setText("")
+    binding.thumbnailUrl.setText("")
+    binding.mangaDescription.setText("")
+    resetTags(manga, binding, scope)
+}
+
 private fun ChipGroup.setChips(items: List<String>, scope: CoroutineScope) {
     removeAllViews()
 

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaScreen.kt

@@ -64,6 +64,7 @@ import exh.recs.RecommendsScreen
 import exh.source.MERGED_SOURCE_ID
 import exh.source.getMainSource
 import exh.source.isMdBasedSource
+import exh.ui.ifSourcesLoaded
 import exh.ui.metadata.MetadataViewScreen
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.flow.launchIn
@@ -98,6 +99,11 @@ class MangaScreen(
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val navigator = LocalNavigator.currentOrThrow
         val context = LocalContext.current
         val haptic = LocalHapticFeedback.current

app/src/main/java/eu/kanade/tachiyomi/ui/manga/track/TrackInfoDialog.kt

@@ -427,6 +427,7 @@ private data class TrackDateSelectorScreen(
     private val start: Boolean,
 ) : Screen() {
 
+    @Transient
     private val selectableDates = object : SelectableDates {
         override fun isSelectableDate(utcTimeMillis: Long): Boolean {
             val dateToCheck = Instant.ofEpochMilli(utcTimeMillis)

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -91,6 +91,7 @@ import eu.kanade.tachiyomi.util.system.toShareIntent
 import eu.kanade.tachiyomi.util.system.toast
 import eu.kanade.tachiyomi.util.view.setComposeContent
 import exh.source.isEhBasedSource
+import exh.ui.ifSourcesLoaded
 import exh.util.defaultReaderType
 import exh.util.mangaType
 import kotlinx.collections.immutable.persistentSetOf
@@ -391,6 +392,10 @@ class ReaderActivity : BaseActivity() {
                 )
             }
 
+            if (!ifSourcesLoaded()) {
+                return@setComposeContent
+            }
+
             val isHttpSource = viewModel.getSource() is HttpSource
             val isFullscreen by readerPreferences.fullscreen().collectAsState()
             val flashOnPageChange by readerPreferences.flashOnPageChange().collectAsState()

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderViewModel.kt

@@ -14,6 +14,7 @@ import eu.kanade.domain.chapter.model.toDbChapter
 import eu.kanade.domain.manga.interactor.SetMangaViewerFlags
 import eu.kanade.domain.manga.model.readerOrientation
 import eu.kanade.domain.manga.model.readingMode
+import eu.kanade.domain.sync.SyncPreferences
 import eu.kanade.domain.track.interactor.TrackChapter
 import eu.kanade.domain.track.service.TrackPreferences
 import eu.kanade.domain.ui.UiPreferences
@@ -24,6 +25,7 @@ import eu.kanade.tachiyomi.data.download.model.Download
 import eu.kanade.tachiyomi.data.saver.Image
 import eu.kanade.tachiyomi.data.saver.ImageSaver
 import eu.kanade.tachiyomi.data.saver.Location
+import eu.kanade.tachiyomi.data.sync.SyncDataJob
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.source.online.MetadataSource
@@ -63,6 +65,7 @@ import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.drop
 import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.mapLatest
@@ -124,6 +127,7 @@ class ReaderViewModel @JvmOverloads constructor(
     private val upsertHistory: UpsertHistory = Injekt.get(),
     private val updateChapter: UpdateChapter = Injekt.get(),
     private val setMangaViewerFlags: SetMangaViewerFlags = Injekt.get(),
+    private val syncPreferences: SyncPreferences = Injekt.get(),
     // SY -->
     private val uiPreferences: UiPreferences = Injekt.get(),
     private val getFlatMetadataById: GetFlatMetadataById = Injekt.get(),
@@ -336,6 +340,7 @@ class ReaderViewModel @JvmOverloads constructor(
                 val manga = getManga.await(mangaId)
                 if (manga != null) {
                     // SY -->
+                    sourceManager.isInitialized.first { it }
                     val source = sourceManager.getOrStub(manga.source)
                     val metadataSource = source.getMainSource<MetadataSource<*, *>>()
                     val metadata = if (metadataSource != null) {
@@ -384,7 +389,6 @@ class ReaderViewModel @JvmOverloads constructor(
                         context = context,
                         downloadManager = downloadManager,
                         downloadProvider = downloadProvider,
-                        tempFileManager = tempFileManager,
                         manga = manga,
                         source = source, /* SY --> */
                         sourceManager = sourceManager,
@@ -675,6 +679,8 @@ class ReaderViewModel @JvmOverloads constructor(
         hasExtraPage: Boolean, /* SY <-- */
     ) {
         val pageIndex = page.index
+        val syncTriggerOpt = syncPreferences.getSyncTriggerOptions()
+        val isSyncEnabled = syncPreferences.isSyncEnabled()
 
         mutableState.update {
             it.copy(currentPage = pageIndex + 1)
@@ -719,6 +725,11 @@ class ReaderViewModel @JvmOverloads constructor(
                 // SY <--
                 updateTrackChapterRead(readerChapter)
                 deleteChapterIfNeeded(readerChapter)
+
+                // Check if syncing is enabled for chapter read:
+                if (isSyncEnabled && syncTriggerOpt.syncOnChapterRead) {
+                    SyncDataJob.startNow(Injekt.get<Application>())
+                }
             }
 
             updateChapter.await(
@@ -728,6 +739,11 @@ class ReaderViewModel @JvmOverloads constructor(
                     lastPageRead = readerChapter.chapter.last_page_read.toLong(),
                 ),
             )
+
+            // Check if syncing is enabled for chapter open:
+            if (isSyncEnabled && syncTriggerOpt.syncOnChapterOpen && readerChapter.chapter.last_page_read == 0) {
+                SyncDataJob.startNow(Injekt.get<Application>())
+            }
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/ChapterLoader.kt

@@ -10,7 +10,6 @@ import eu.kanade.tachiyomi.source.online.all.MergedSource
 import eu.kanade.tachiyomi.ui.reader.model.ReaderChapter
 import eu.kanade.tachiyomi.ui.reader.setting.ReaderPreferences
 import tachiyomi.core.common.i18n.stringResource
-import tachiyomi.core.common.storage.UniFileTempFileManager
 import tachiyomi.core.common.util.lang.withIOContext
 import tachiyomi.core.common.util.system.logcat
 import tachiyomi.domain.manga.model.Manga
@@ -28,7 +27,6 @@ class ChapterLoader(
     private val context: Context,
     private val downloadManager: DownloadManager,
     private val downloadProvider: DownloadProvider,
-    private val tempFileManager: UniFileTempFileManager,
     private val manga: Manga,
     private val source: Source,
     // SY -->
@@ -121,36 +119,39 @@ class ChapterLoader(
                         source = source,
                         downloadManager = downloadManager,
                         downloadProvider = downloadProvider,
-                        tempFileManager = tempFileManager,
                     )
                     source is HttpSource -> HttpPageLoader(chapter, source)
                     source is LocalSource -> source.getFormat(chapter.chapter).let { format ->
                         when (format) {
                             is Format.Directory -> DirectoryPageLoader(format.file)
-                            is Format.Zip -> ZipPageLoader(tempFileManager.createTempFile(format.file))
+                            is Format.Zip -> ZipPageLoader(format.file, context)
                             is Format.Rar -> try {
-                                RarPageLoader(tempFileManager.createTempFile(format.file))
+                                RarPageLoader(format.file)
                             } catch (e: UnsupportedRarV5Exception) {
                                 error(context.stringResource(MR.strings.loader_rar5_error))
                             }
-                            is Format.Epub -> EpubPageLoader(tempFileManager.createTempFile(format.file))
+                            is Format.Epub -> EpubPageLoader(format.file, context)
                         }
                     }
                     else -> error(context.stringResource(MR.strings.loader_not_implemented_error))
                 }
             }
             // SY <--
-            isDownloaded -> DownloadPageLoader(chapter, manga, source, downloadManager, downloadProvider, tempFileManager)
+            isDownloaded -> DownloadPageLoader(chapter, manga, source, downloadManager, downloadProvider)
             source is LocalSource -> source.getFormat(chapter.chapter).let { format ->
                 when (format) {
                     is Format.Directory -> DirectoryPageLoader(format.file)
-                    is Format.Zip -> ZipPageLoader(tempFileManager.createTempFile(format.file))
+                    // SY -->
+                    is Format.Zip -> ZipPageLoader(format.file, context)
                     is Format.Rar -> try {
-                        RarPageLoader(tempFileManager.createTempFile(format.file))
+                        RarPageLoader(format.file)
+                        // SY <--
                     } catch (e: UnsupportedRarV5Exception) {
                         error(context.stringResource(MR.strings.loader_rar5_error))
                     }
-                    is Format.Epub -> EpubPageLoader(tempFileManager.createTempFile(format.file))
+                    // SY -->
+                    is Format.Epub -> EpubPageLoader(format.file, context)
+                    // SY <--
                 }
             }
             source is HttpSource -> HttpPageLoader(chapter, source)

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/DownloadPageLoader.kt

@@ -10,7 +10,6 @@ import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.ui.reader.model.ReaderChapter
 import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
-import tachiyomi.core.common.storage.UniFileTempFileManager
 import tachiyomi.domain.manga.model.Manga
 import uy.kohesive.injekt.injectLazy
 
@@ -23,7 +22,6 @@ internal class DownloadPageLoader(
     private val source: Source,
     private val downloadManager: DownloadManager,
     private val downloadProvider: DownloadProvider,
-    private val tempFileManager: UniFileTempFileManager,
 ) : PageLoader() {
 
     private val context: Application by injectLazy()
@@ -48,7 +46,9 @@ internal class DownloadPageLoader(
     }
 
     private suspend fun getPagesFromArchive(file: UniFile): List<ReaderPage> {
-        val loader = ZipPageLoader(tempFileManager.createTempFile(file)).also { zipPageLoader = it }
+        // SY -->
+        val loader = ZipPageLoader(file, context).also { zipPageLoader = it }
+        // SY <--
         return loader.getPages()
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/EpubPageLoader.kt

@@ -1,16 +1,19 @@
 package eu.kanade.tachiyomi.ui.reader.loader
 
+import android.content.Context
+import com.hippo.unifile.UniFile
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
 import eu.kanade.tachiyomi.util.storage.EpubFile
-import java.io.File
 
 /**
  * Loader used to load a chapter from a .epub file.
  */
-internal class EpubPageLoader(file: File) : PageLoader() {
+// SY -->
+internal class EpubPageLoader(file: UniFile, context: Context) : PageLoader() {
 
-    private val epub = EpubFile(file)
+    private val epub = EpubFile(file, context)
+    // SY <--
 
     override var isLocal: Boolean = true
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/RarPageLoader.kt

@@ -1,6 +1,7 @@
 package eu.kanade.tachiyomi.ui.reader.loader
 
 import android.app.Application
+import android.os.Build
 import com.github.junrar.Archive
 import com.github.junrar.rarfile.FileHeader
 import com.hippo.unifile.UniFile
@@ -8,6 +9,14 @@ import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
 import eu.kanade.tachiyomi.ui.reader.setting.ReaderPreferences
 import eu.kanade.tachiyomi.util.lang.compareToCaseInsensitiveNaturalOrder
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import tachiyomi.core.common.storage.UniFileTempFileManager
 import tachiyomi.core.common.util.system.ImageUtil
 import uy.kohesive.injekt.injectLazy
 import java.io.File
@@ -19,11 +28,17 @@ import java.util.concurrent.Executors
 /**
  * Loader used to load a chapter from a .rar or .cbr file.
  */
-internal class RarPageLoader(file: File) : PageLoader() {
+internal class RarPageLoader(file: UniFile) : PageLoader() {
-
-    private val rar = Archive(file)
 
     // SY -->
+    private val tempFileManager: UniFileTempFileManager by injectLazy()
+
+    private val rar = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
+        Archive(tempFileManager.createTempFile(file))
+    } else {
+        Archive(file.openInputStream())
+    }
+
     private val context: Application by injectLazy()
     private val readerPreferences: ReaderPreferences by injectLazy()
     private val tmpDir = File(context.externalCacheDir, "reader_${file.hashCode()}").also {
@@ -31,20 +46,21 @@ internal class RarPageLoader(file: File) : PageLoader() {
     }
 
     init {
-        if (readerPreferences.cacheArchiveMangaOnDisk().get()) {
+        if (readerPreferences.archiveReaderMode().get() == ReaderPreferences.ArchiveReaderMode.CACHE_TO_DISK) {
             tmpDir.mkdirs()
-            Archive(file).use { rar ->
+            rar.fileHeaders.asSequence()
-                rar.fileHeaders.asSequence()
+                .filter { !it.isDirectory && ImageUtil.isImage(it.fileName) { rar.getInputStream(it) } }
-                    .filterNot { it.isDirectory }
+                .sortedWith { f1, f2 -> f1.fileName.compareToCaseInsensitiveNaturalOrder(f2.fileName) }
-                    .forEach { header ->
+                .forEach { header ->
-                        val pageOutputStream = File(tmpDir, header.fileName.substringAfterLast("/"))
+                    File(tmpDir, header.fileName.substringAfterLast("/"))
-                            .also { it.createNewFile() }
+                        .also { it.createNewFile() }
-                            .outputStream()
+                        .outputStream()
-                        getStream(header).use {
+                        .use { output ->
-                            it.copyTo(pageOutputStream)
+                            rar.getInputStream(header).use { input ->
+                                input.copyTo(output)
+                            }
                         }
-                    }
+                }
-            }
         }
     }
     // SY <--
@@ -58,16 +74,37 @@ internal class RarPageLoader(file: File) : PageLoader() {
 
     override suspend fun getPages(): List<ReaderPage> {
         // SY -->
-        if (readerPreferences.cacheArchiveMangaOnDisk().get()) {
+        if (readerPreferences.archiveReaderMode().get() == ReaderPreferences.ArchiveReaderMode.CACHE_TO_DISK) {
             return DirectoryPageLoader(UniFile.fromFile(tmpDir)!!).getPages()
         }
+        val mutex = Mutex()
         // SY <--
         return rar.fileHeaders.asSequence()
             .filter { !it.isDirectory && ImageUtil.isImage(it.fileName) { rar.getInputStream(it) } }
             .sortedWith { f1, f2 -> f1.fileName.compareToCaseInsensitiveNaturalOrder(f2.fileName) }
             .mapIndexed { i, header ->
+                // SY -->
+                val imageBytesDeferred: Deferred<ByteArray>? =
+                    when (readerPreferences.archiveReaderMode().get()) {
+                        ReaderPreferences.ArchiveReaderMode.LOAD_INTO_MEMORY -> {
+                            CoroutineScope(Dispatchers.IO).async {
+                                mutex.withLock {
+                                    getStream(header).buffered().use { stream ->
+                                        stream.readBytes()
+                                    }
+                                }
+                            }
+                        }
+
+                        else -> null
+                    }
+
+                val imageBytes by lazy { runBlocking { imageBytesDeferred?.await() } }
+                // SY <--
                 ReaderPage(i).apply {
-                    stream = { getStream(header) }
+                    // SY -->
+                    stream = { imageBytes?.copyOf()?.inputStream() ?: getStream(header) }
+                    // SY <--
                     status = Page.State.READY
                 }
             }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/ZipPageLoader.kt

@@ -1,6 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.loader
 
-import android.app.Application
+import android.content.Context
 import android.os.Build
 import com.hippo.unifile.UniFile
 import eu.kanade.tachiyomi.source.model.Page
@@ -8,107 +8,155 @@ import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
 import eu.kanade.tachiyomi.ui.reader.setting.ReaderPreferences
 import eu.kanade.tachiyomi.util.lang.compareToCaseInsensitiveNaturalOrder
 import eu.kanade.tachiyomi.util.storage.CbzCrypto
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import org.apache.commons.compress.archivers.zip.ZipFile
 import tachiyomi.core.common.i18n.stringResource
+import tachiyomi.core.common.storage.UniFileTempFileManager
+import tachiyomi.core.common.storage.isEncryptedZip
+import tachiyomi.core.common.storage.openReadOnlyChannel
+import tachiyomi.core.common.storage.testCbzPassword
+import tachiyomi.core.common.storage.unzip
 import tachiyomi.core.common.util.system.ImageUtil
 import tachiyomi.i18n.sy.SYMR
 import uy.kohesive.injekt.injectLazy
 import java.io.File
-import java.nio.charset.StandardCharsets
+import java.nio.channels.SeekableByteChannel
-import java.util.zip.ZipFile
 import net.lingala.zip4j.ZipFile as Zip4jFile
 
 /**
  * Loader used to load a chapter from a .zip or .cbz file.
  */
-internal class ZipPageLoader(file: File) : PageLoader() {
+internal class ZipPageLoader(file: UniFile, context: Context) : PageLoader() {
 
     // SY -->
-    private val context: Application by injectLazy()
+    private val channel: SeekableByteChannel = file.openReadOnlyChannel(context)
+    private val tempFileManager: UniFileTempFileManager by injectLazy()
     private val readerPreferences: ReaderPreferences by injectLazy()
     private val tmpDir = File(context.externalCacheDir, "reader_${file.hashCode()}").also {
         it.deleteRecursively()
     }
-    private val zip4j: Zip4jFile = Zip4jFile(file)
+
-    private val zip: ZipFile? =
+    private val apacheZip: ZipFile? = if (!file.isEncryptedZip() && Build.VERSION.SDK_INT > Build.VERSION_CODES.N) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+        ZipFile(channel)
-            if (!zip4j.isEncrypted) ZipFile(file, StandardCharsets.ISO_8859_1) else null
+    } else {
+        null
+    }
+
+    private val tmpFile =
+        if (
+            apacheZip == null &&
+            readerPreferences.archiveReaderMode().get() != ReaderPreferences.ArchiveReaderMode.CACHE_TO_DISK
+        ) {
+            tempFileManager.createTempFile(file)
         } else {
-            if (!zip4j.isEncrypted) ZipFile(file) else null
+            null
+        }
+
+    private val zip4j =
+        if (apacheZip == null && tmpFile != null) {
+            Zip4jFile(tmpFile)
+        } else {
+            null
         }
 
     init {
-        Zip4jFile(file).use { zip ->
+        if (file.isEncryptedZip()) {
-            if (zip.isEncrypted) {
+            if (!file.testCbzPassword()) {
-                if (!CbzCrypto.checkCbzPassword(zip, CbzCrypto.getDecryptedPasswordCbz())) {
+                this.recycle()
-                    this.recycle()
+                throw IllegalStateException(context.stringResource(SYMR.strings.wrong_cbz_archive_password))
-                    throw IllegalStateException(context.stringResource(SYMR.strings.wrong_cbz_archive_password))
-                }
-                zip4j.setPassword(CbzCrypto.getDecryptedPasswordCbz())
-                if (readerPreferences.cacheArchiveMangaOnDisk().get()) {
-                    unzip()
-                }
-            } else {
-                if (readerPreferences.cacheArchiveMangaOnDisk().get()) {
-                    unzip()
-                }
             }
+            zip4j?.setPassword(CbzCrypto.getDecryptedPasswordCbz())
+        }
+        if (readerPreferences.archiveReaderMode().get() == ReaderPreferences.ArchiveReaderMode.CACHE_TO_DISK) {
+            file.unzip(tmpDir, onlyCopyImages = true)
         }
     }
 
     // SY <--
     override fun recycle() {
         super.recycle()
-        zip?.close()
+        apacheZip?.close()
         // SY -->
-        zip4j.close()
+        zip4j?.close()
         tmpDir.deleteRecursively()
     }
-    private fun unzip() {
-        tmpDir.mkdirs()
-        zip4j.fileHeaders.asSequence()
-            .filter { !it.isDirectory && ImageUtil.isImage(it.fileName) { zip4j.getInputStream(it) } }
-            .forEach { entry ->
-                zip4j.extractFile(entry, tmpDir.absolutePath)
-            }
-    }
 
     override var isLocal: Boolean = true
 
     override suspend fun getPages(): List<ReaderPage> {
-        if (readerPreferences.cacheArchiveMangaOnDisk().get()) {
+        if (readerPreferences.archiveReaderMode().get() == ReaderPreferences.ArchiveReaderMode.CACHE_TO_DISK) {
             return DirectoryPageLoader(UniFile.fromFile(tmpDir)!!).getPages()
         }
-
+        return if (apacheZip == null) {
-        if (zip == null) {
+            loadZip4j()
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-                zip4j.charset = StandardCharsets.ISO_8859_1
-            }
-
-            return zip4j.fileHeaders.asSequence()
-                .filter { !it.isDirectory && ImageUtil.isImage(it.fileName) { zip4j.getInputStream(it) } }
-                .sortedWith { f1, f2 -> f1.fileName.compareToCaseInsensitiveNaturalOrder(f2.fileName) }
-                .mapIndexed { i, entry ->
-                    ReaderPage(i).apply {
-                        stream = { zip4j.getInputStream(entry) }
-                        status = Page.State.READY
-                        zip4jFile = zip4j
-                        zip4jEntry = entry
-                    }
-                }.toList()
         } else {
-            // SY <--
+            loadApacheZip(apacheZip)
-            return zip.entries().asSequence()
-                .filter { !it.isDirectory && ImageUtil.isImage(it.name) { zip.getInputStream(it) } }
-                .sortedWith { f1, f2 -> f1.name.compareToCaseInsensitiveNaturalOrder(f2.name) }
-                .mapIndexed { i, entry ->
-                    ReaderPage(i).apply {
-                        stream = { zip.getInputStream(entry) }
-                        status = Page.State.READY
-                    }
-                }.toList()
         }
     }
 
+    private fun loadZip4j(): List<ReaderPage> {
+        val mutex = Mutex()
+        return zip4j!!.fileHeaders.asSequence()
+            .filter { !it.isDirectory && ImageUtil.isImage(it.fileName) { zip4j.getInputStream(it) } }
+            .sortedWith { f1, f2 -> f1.fileName.compareToCaseInsensitiveNaturalOrder(f2.fileName) }
+            .mapIndexed { i, entry ->
+                val imageBytesDeferred: Deferred<ByteArray>? =
+                    when (readerPreferences.archiveReaderMode().get()) {
+                        ReaderPreferences.ArchiveReaderMode.LOAD_INTO_MEMORY -> {
+                            CoroutineScope(Dispatchers.IO).async {
+                                mutex.withLock {
+                                    zip4j.getInputStream(entry).buffered().use { stream ->
+                                        stream.readBytes()
+                                    }
+                                }
+                            }
+                        }
+
+                        else -> null
+                    }
+                val imageBytes by lazy { runBlocking { imageBytesDeferred?.await() } }
+                ReaderPage(i).apply {
+                    stream = { imageBytes?.copyOf()?.inputStream() ?: zip4j.getInputStream(entry) }
+                    status = Page.State.READY
+                }
+            }.toList()
+    }
+
+    private fun loadApacheZip(zip: ZipFile): List<ReaderPage> {
+        val mutex = Mutex()
+        return zip.entries.asSequence()
+            .filter { !it.isDirectory && ImageUtil.isImage(it.name) { zip.getInputStream(it) } }
+            .sortedWith { f1, f2 -> f1.name.compareToCaseInsensitiveNaturalOrder(f2.name) }
+            .mapIndexed { i, entry ->
+                val imageBytesDeferred: Deferred<ByteArray>? =
+                    when (readerPreferences.archiveReaderMode().get()) {
+                        ReaderPreferences.ArchiveReaderMode.LOAD_INTO_MEMORY -> {
+                            CoroutineScope(Dispatchers.IO).async {
+                                mutex.withLock {
+                                    zip.getInputStream(entry).buffered().use { stream ->
+                                        stream.readBytes()
+                                    }
+                                }
+                            }
+                        }
+
+                        else -> null
+                    }
+                val imageBytes by lazy { runBlocking { imageBytesDeferred?.await() } }
+                ReaderPage(i).apply {
+                    stream = { imageBytes?.copyOf()?.inputStream() ?: zip.getInputStream(entry) }
+                    status = Page.State.READY
+                }
+            }.toList()
+    }
+    // SY <--
+
     /**
      * No additional action required to load the page
      */

app/src/main/java/eu/kanade/tachiyomi/ui/reader/model/ReaderPage.kt

@@ -1,8 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.model
 
 import eu.kanade.tachiyomi.source.model.Page
-import net.lingala.zip4j.ZipFile
-import net.lingala.zip4j.model.FileHeader
 import java.io.InputStream
 
 open class ReaderPage(
@@ -10,9 +8,6 @@ open class ReaderPage(
     url: String = "",
     imageUrl: String? = null,
     // SY -->
-    /** zip4j inputStreams do not support mark() and release(), so they must be passed to ImageUtil */
-    var zip4jFile: ZipFile? = null,
-    var zip4jEntry: FileHeader? = null,
     /** Value to check if this page is used to as if it was too wide */
     var shiftedPage: Boolean = false,
     /** Value to check if a page is can be doubled up, but can't because the next page is too wide */

app/src/main/java/eu/kanade/tachiyomi/ui/reader/setting/ReaderPreferences.kt

@@ -180,9 +180,9 @@ class ReaderPreferences(
 
     fun centerMarginType() = preferenceStore.getInt("center_margin_type", PagerConfig.CenterMarginType.NONE)
 
-    fun cacheArchiveMangaOnDisk() = preferenceStore.getBoolean("cache_archive_manga_on_disk", false)
+    fun archiveReaderMode() = preferenceStore.getInt("archive_reader_mode", ArchiveReaderMode.LOAD_FROM_FILE)
 
-        fun markReadDupe() = preferenceStore.getBoolean("mark_read_dupe", false)
+    fun markReadDupe() = preferenceStore.getBoolean("mark_read_dupe", false)
     // SY <--
 
     enum class TappingInvertMode(
@@ -203,6 +203,12 @@ class ReaderPreferences(
         LOWEST(47),
     }
 
+    object ArchiveReaderMode {
+        const val LOAD_FROM_FILE = 0
+        const val LOAD_INTO_MEMORY = 1
+        const val CACHE_TO_DISK = 2
+    }
+
     companion object {
         const val WEBTOON_PADDING_MIN = 0
         const val WEBTOON_PADDING_MAX = 25
@@ -264,6 +270,12 @@ class ReaderPreferences(
             SYMR.strings.center_margin_wide_page,
             SYMR.strings.center_margin_double_and_wide_page,
         )
+
+        val archiveModeTypes = listOf(
+            SYMR.strings.archive_mode_load_from_file,
+            SYMR.strings.archive_mode_load_into_memory,
+            SYMR.strings.archive_mode_cache_to_disk
+        )
         // SY <--
     }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerPageHolder.kt

@@ -230,13 +230,7 @@ class PagerPageHolder(
             return splitInHalf(imageStream)
         }
 
-        val isDoublePage = ImageUtil.isWideImage(
+        val isDoublePage = ImageUtil.isWideImage(imageStream)
-            imageStream,
-            // SY -->
-            page.zip4jFile,
-            page.zip4jEntry,
-            // SY <--
-        )
         if (!isDoublePage) {
             return imageStream
         }
@@ -247,13 +241,7 @@ class PagerPageHolder(
     }
 
     private fun rotateDualPage(imageStream: BufferedInputStream): InputStream {
-        val isDoublePage = ImageUtil.isWideImage(
+        val isDoublePage = ImageUtil.isWideImage(imageStream)
-            imageStream,
-            // SY -->
-            page.zip4jFile,
-            page.zip4jEntry,
-            // SY <--
-        )
         return if (isDoublePage) {
             val rotation = if (viewer.config.dualPageRotateToFitInvert) -90f else 90f
             ImageUtil.rotateImage(imageStream, rotation)
@@ -267,13 +255,7 @@ class PagerPageHolder(
         if (imageStream2 == null) {
             return if (imageStream is BufferedInputStream &&
                 !ImageUtil.isAnimatedAndSupported(imageStream) &&
-                ImageUtil.isWideImage(
+                ImageUtil.isWideImage(imageStream) &&
-                    imageStream,
-                    // SY -->
-                    page.zip4jFile,
-                    page.zip4jEntry,
-                    // SY <--
-                ) &&
                 viewer.config.centerMarginType and PagerConfig.CenterMarginType.WIDE_PAGE_CENTER_MARGIN > 0 &&
                 !viewer.config.imageCropBorders
             ) {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt

@@ -224,13 +224,7 @@ class WebtoonPageHolder(
         }
 
         if (viewer.config.dualPageSplit) {
-            val isDoublePage = ImageUtil.isWideImage(
+            val isDoublePage = ImageUtil.isWideImage(imageStream)
-                imageStream,
-                // SY -->
-                page?.zip4jFile,
-                page?.zip4jEntry,
-                // SY <--
-            )
             if (isDoublePage) {
                 val upperSide = if (viewer.config.dualPageInvert) ImageUtil.Side.LEFT else ImageUtil.Side.RIGHT
                 return ImageUtil.splitAndMerge(imageStream, upperSide)
@@ -241,13 +235,7 @@ class WebtoonPageHolder(
     }
 
     private fun rotateDualPage(imageStream: BufferedInputStream): InputStream {
-        val isDoublePage = ImageUtil.isWideImage(
+        val isDoublePage = ImageUtil.isWideImage(imageStream)
-            imageStream,
-            // SY -->
-            page?.zip4jFile,
-            page?.zip4jEntry,
-            // SY <--
-        )
         return if (isDoublePage) {
             val rotation = if (viewer.config.dualPageRotateToFitInvert) -90f else 90f
             ImageUtil.rotateImage(imageStream, rotation)

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/GoogleDriveLoginActivity.kt

@@ -0,0 +1,54 @@
+package eu.kanade.tachiyomi.ui.setting.track
+
+import android.net.Uri
+import android.widget.Toast
+import androidx.lifecycle.lifecycleScope
+import eu.kanade.tachiyomi.data.sync.service.GoogleDriveService
+import tachiyomi.core.common.i18n.stringResource
+import tachiyomi.core.common.util.lang.launchIO
+import tachiyomi.i18n.MR
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+
+class GoogleDriveLoginActivity : BaseOAuthLoginActivity() {
+    private val googleDriveService = Injekt.get<GoogleDriveService>()
+    override fun handleResult(data: Uri?) {
+        val code = data?.getQueryParameter("code")
+        val error = data?.getQueryParameter("error")
+        if (code != null) {
+            lifecycleScope.launchIO {
+                googleDriveService.handleAuthorizationCode(
+                    code,
+                    this@GoogleDriveLoginActivity,
+                    onSuccess = {
+                        Toast.makeText(
+                            this@GoogleDriveLoginActivity,
+                            stringResource(MR.strings.google_drive_login_success),
+                            Toast.LENGTH_LONG,
+                        ).show()
+
+                        returnToSettings()
+                    },
+                    onFailure = { error ->
+                        Toast.makeText(
+                            this@GoogleDriveLoginActivity,
+                            stringResource(MR.strings.google_drive_login_failed, error),
+                            Toast.LENGTH_LONG,
+                        ).show()
+                        returnToSettings()
+                    },
+                )
+            }
+        } else if (error != null) {
+            Toast.makeText(
+                this@GoogleDriveLoginActivity,
+                stringResource(MR.strings.google_drive_login_failed, error),
+                Toast.LENGTH_LONG,
+            ).show()
+
+            returnToSettings()
+        } else {
+            returnToSettings()
+        }
+    }
+}

app/src/main/java/exh/EXHMigrations.kt

@@ -1,6 +1,7 @@
 package exh
 
 import android.content.Context
+import android.widget.Toast
 import androidx.core.content.edit
 import androidx.preference.PreferenceManager
 import eu.kanade.domain.base.BasePreferences
@@ -20,6 +21,7 @@ import eu.kanade.tachiyomi.source.online.all.NHentai
 import eu.kanade.tachiyomi.ui.reader.setting.ReaderOrientation
 import eu.kanade.tachiyomi.ui.reader.setting.ReaderPreferences
 import eu.kanade.tachiyomi.util.system.DeviceUtil
+import eu.kanade.tachiyomi.util.system.toast
 import eu.kanade.tachiyomi.util.system.workManager
 import exh.eh.EHentaiUpdateWorker
 import exh.log.xLogE
@@ -654,6 +656,33 @@ object EXHMigrations {
                         remove(Preference.appStateKey("trusted_signatures"))
                     }
                 }
+                if (oldVersion under 66) {
+                    val cacheImagesToDisk = prefs.getBoolean("cache_archive_manga_on_disk", false)
+                    if (cacheImagesToDisk) {
+                        readerPreferences.archiveReaderMode().set(ReaderPreferences.ArchiveReaderMode.CACHE_TO_DISK)
+                    }
+                }
+
+                if (oldVersion under 66) {
+                    if (prefs.getBoolean(Preference.privateKey("encrypt_database"), false)) {
+                        context.toast(
+                            "Restart the app to load your encrypted library",
+                            Toast.LENGTH_LONG
+                        )
+                    }
+
+                    val appStatePrefsToReplace = listOf(
+                        "__PRIVATE_sql_password",
+                        "__PRIVATE_encrypt_database",
+                        "__PRIVATE_cbz_password",
+                    )
+
+                    replacePreferences(
+                        preferenceStore = preferenceStore,
+                        filterPredicate = { it.key in appStatePrefsToReplace },
+                        newKey = { Preference.appStateKey(it.replace("__PRIVATE_", "").trim()) },
+                    )
+                }
 
                 // if (oldVersion under 1) { } (1 is current release version)
                 // do stuff here when releasing changed crap

app/src/main/java/exh/eh/EHentaiUpdateHelper.kt

@@ -254,6 +254,7 @@ class EHentaiUpdateHelper(context: Context) {
                         scanlator = null,
                         sourceOrder = -1,
                         lastModifiedAt = 0,
+                        version = 0,
                     )
                 }
             }

app/src/main/java/exh/md/follows/MangaDexFollowsScreen.kt

@@ -23,15 +23,22 @@ import eu.kanade.presentation.util.Screen
 import eu.kanade.tachiyomi.ui.browse.source.browse.BrowseSourceScreenModel
 import eu.kanade.tachiyomi.ui.category.CategoryScreen
 import eu.kanade.tachiyomi.ui.manga.MangaScreen
+import exh.ui.ifSourcesLoaded
 import tachiyomi.core.common.util.lang.launchIO
 import tachiyomi.i18n.sy.SYMR
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.i18n.stringResource
+import tachiyomi.presentation.core.screens.LoadingScreen
 
 class MangaDexFollowsScreen(private val sourceId: Long) : Screen() {
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val navigator = LocalNavigator.currentOrThrow
         val scope = rememberCoroutineScope()
         val haptic = LocalHapticFeedback.current

app/src/main/java/exh/md/similar/MangaDexSimilarScreen.kt

@@ -15,15 +15,22 @@ import eu.kanade.presentation.browse.BrowseSourceContent
 import eu.kanade.presentation.browse.components.BrowseSourceSimpleToolbar
 import eu.kanade.presentation.util.Screen
 import eu.kanade.tachiyomi.ui.manga.MangaScreen
+import exh.ui.ifSourcesLoaded
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.i18n.sy.SYMR
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.i18n.stringResource
+import tachiyomi.presentation.core.screens.LoadingScreen
 
 class MangaDexSimilarScreen(val mangaId: Long, val sourceId: Long) : Screen() {
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val screenModel = rememberScreenModel { MangaDexSimilarScreenModel(mangaId, sourceId) }
         val state by screenModel.state.collectAsState()
         val navigator = LocalNavigator.currentOrThrow

app/src/main/java/exh/recs/RecommendsScreen.kt

@@ -16,13 +16,20 @@ import eu.kanade.presentation.browse.BrowseSourceContent
 import eu.kanade.presentation.browse.components.BrowseSourceSimpleToolbar
 import eu.kanade.presentation.util.Screen
 import eu.kanade.tachiyomi.ui.browse.source.SourcesScreen
+import exh.ui.ifSourcesLoaded
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.presentation.core.components.material.Scaffold
+import tachiyomi.presentation.core.screens.LoadingScreen
 
 class RecommendsScreen(val mangaId: Long, val sourceId: Long) : Screen() {
 
     @Composable
     override fun Content() {
+        if (!ifSourcesLoaded()) {
+            LoadingScreen()
+            return
+        }
+
         val screenModel = rememberScreenModel { RecommendsScreenModel(mangaId, sourceId) }
         val state by screenModel.state.collectAsState()
         val navigator = LocalNavigator.currentOrThrow

app/src/main/java/exh/ui/SourceUtil.kt

@@ -0,0 +1,13 @@
+package exh.ui
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.remember
+import tachiyomi.domain.source.service.SourceManager
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+
+@Composable
+fun ifSourcesLoaded(): Boolean {
+    return remember { Injekt.get<SourceManager>().isInitialized }.collectAsState().value
+}

app/src/main/java/exh/ui/intercept/InterceptActivity.kt

@@ -28,19 +28,22 @@ import eu.kanade.tachiyomi.ui.reader.ReaderActivity
 import eu.kanade.tachiyomi.util.view.setComposeContent
 import exh.GalleryAddEvent
 import exh.GalleryAdder
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
-import kotlinx.coroutines.launch
 import tachiyomi.core.common.Constants
 import tachiyomi.core.common.i18n.stringResource
+import tachiyomi.core.common.util.lang.launchIO
 import tachiyomi.domain.chapter.model.Chapter
 import tachiyomi.domain.manga.model.Manga
+import tachiyomi.domain.source.service.SourceManager
 import tachiyomi.i18n.MR
 import tachiyomi.i18n.sy.SYMR
 import tachiyomi.presentation.core.components.material.Scaffold
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
 
 class InterceptActivity : BaseActivity() {
     private var statusJob: Job? = null
@@ -108,7 +111,11 @@ class InterceptActivity : BaseActivity() {
 
     private fun processLink() {
         if (Intent.ACTION_VIEW == intent.action) {
-            loadGallery(intent.dataString!!)
+            lifecycleScope.launchIO {
+                // wait for sources to load
+                Injekt.get<SourceManager>().isInitialized.first { it }
+                loadGallery(intent.dataString!!)
+            }
         }
     }
 
@@ -167,8 +174,7 @@ class InterceptActivity : BaseActivity() {
 
     private val galleryAdder = GalleryAdder()
 
-    @Synchronized
+    suspend fun loadGallery(gallery: String) {
-    fun loadGallery(gallery: String) {
         // Do not load gallery if already loading
         if (status.value is InterceptResult.Idle) {
             status.value = InterceptResult.Loading
@@ -178,7 +184,9 @@ class InterceptActivity : BaseActivity() {
                     .setTitle(MR.strings.label_sources.getString(this))
                     .setSingleChoiceItems(sources.map { it.toString() }.toTypedArray(), 0) { dialog, index ->
                         dialog.dismiss()
-                        loadGalleryEnd(gallery, sources[index])
+                        lifecycleScope.launchIO {
+                            loadGalleryEnd(gallery, sources[index])
+                        }
                     }
                     .show()
             } else {
@@ -187,15 +195,12 @@ class InterceptActivity : BaseActivity() {
         }
     }
 
-    private fun loadGalleryEnd(gallery: String, source: UrlImportableSource? = null) {
+    private suspend fun loadGalleryEnd(gallery: String, source: UrlImportableSource? = null) {
-        // Load gallery async
+        val result = galleryAdder.addGallery(this@InterceptActivity, gallery, forceSource = source)
-        lifecycleScope.launch(Dispatchers.IO) {
-            val result = galleryAdder.addGallery(this@InterceptActivity, gallery, forceSource = source)
 
-            status.value = when (result) {
+        status.value = when (result) {
-                is GalleryAddEvent.Success -> InterceptResult.Success(result.manga.id, result.manga, result.chapter)
+            is GalleryAddEvent.Success -> InterceptResult.Success(result.manga.id, result.manga, result.chapter)
-                is GalleryAddEvent.Fail -> InterceptResult.Failure(result.logMessage)
+            is GalleryAddEvent.Fail -> InterceptResult.Failure(result.logMessage)
-            }
         }
     }
 

app/src/main/res/layout/edit_manga_dialog.xml

@@ -139,6 +139,16 @@
         android:text="@string/reset_tags"
         android:textAllCaps="false" />
 
+    <Button
+        android:id="@+id/reset_info"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginBottom="8dp"
+        android:text="@string/reset_info"
+        android:textAllCaps="false" />
+
     <View
         android:layout_width="match_parent"
         android:layout_height="1dp"

buildSrc/src/main/kotlin/detekt.gradle.kts

@@ -29,6 +29,18 @@ detekt {
     baseline = file(baselineFile)
 }
 
+val detektProjectBaseline by tasks.registering(DetektCreateBaselineTask::class) {
+    description = "Overrides current baseline."
+    buildUponDefaultConfig.set(true)
+    ignoreFailures.set(true)
+    parallel.set(true)
+    setSource(files(rootDir))
+    config.setFrom(configFile)
+    baseline = file(baselineFile)
+    include(kotlinFiles)
+    exclude(resourceFiles, buildFiles, generatedFiles, scriptsFiles)
+}
+
 tasks.withType<Detekt>().configureEach {
     include(kotlinFiles)
     exclude(resourceFiles, buildFiles, generatedFiles, scriptsFiles)

core/common/build.gradle.kts

@@ -36,6 +36,7 @@ dependencies {
     implementation(libs.image.decoder)
 
     implementation(libs.unifile)
+    implementation(libs.bundles.archive)
 
     api(kotlinx.coroutines.core)
     api(kotlinx.serialization.json)

core/common/src/main/kotlin/eu/kanade/tachiyomi/core/security/SecurityPreferences.kt

@@ -24,9 +24,9 @@ class SecurityPreferences(
 
     fun authenticatorDays() = this.preferenceStore.getInt("biometric_days", 0x7F)
 
-    fun encryptDatabase() = this.preferenceStore.getBoolean(Preference.privateKey("encrypt_database"), false)
+    fun encryptDatabase() = this.preferenceStore.getBoolean(Preference.appStateKey("encrypt_database"), false)
 
-    fun sqlPassword() = this.preferenceStore.getString(Preference.privateKey("sql_password"), "")
+    fun sqlPassword() = this.preferenceStore.getString(Preference.appStateKey("sql_password"), "")
 
     fun passwordProtectDownloads() = preferenceStore.getBoolean(
         Preference.privateKey("password_protect_downloads"),
@@ -35,7 +35,7 @@ class SecurityPreferences(
 
     fun encryptionType() = this.preferenceStore.getEnum("encryption_type", EncryptionType.AES_256)
 
-    fun cbzPassword() = this.preferenceStore.getString(Preference.privateKey("cbz_password"), "")
+    fun cbzPassword() = this.preferenceStore.getString(Preference.appStateKey("cbz_password"), "")
     // SY <--
 
     /**

core/common/src/main/kotlin/eu/kanade/tachiyomi/network/NetworkPreferences.kt

@@ -19,7 +19,7 @@ class NetworkPreferences(
     fun defaultUserAgent(): Preference<String> {
         return preferenceStore.getString(
             "default_user_agent",
-            "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/121.0",
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0",
         )
     }
 }

core/common/src/main/kotlin/eu/kanade/tachiyomi/network/Requests.kt

@@ -63,6 +63,19 @@ fun PUT(
         .cacheControl(cache)
         .build()
 }
+fun PATCH(
+    url: String,
+    headers: Headers = DEFAULT_HEADERS,
+    body: RequestBody = DEFAULT_BODY,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL,
+): Request {
+    return Request.Builder()
+        .url(url)
+        .patch(body)
+        .headers(headers)
+        .cacheControl(cache)
+        .build()
+}
 
 fun DELETE(
     url: String,

core/common/src/main/kotlin/eu/kanade/tachiyomi/util/storage/CbzCrypto.kt

@@ -3,25 +3,15 @@ package eu.kanade.tachiyomi.util.storage
 import android.security.keystore.KeyGenParameterSpec
 import android.security.keystore.KeyProperties
 import android.util.Base64
-import com.hippo.unifile.UniFile
 import eu.kanade.tachiyomi.core.security.SecurityPreferences
-import eu.kanade.tachiyomi.util.lang.compareToCaseInsensitiveNaturalOrder
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
-import logcat.LogPriority
-import net.lingala.zip4j.ZipFile
-import net.lingala.zip4j.exception.ZipException
-import net.lingala.zip4j.io.inputstream.ZipInputStream
-import net.lingala.zip4j.io.outputstream.ZipOutputStream
-import net.lingala.zip4j.model.LocalFileHeader
 import net.lingala.zip4j.model.ZipParameters
 import net.lingala.zip4j.model.enums.AesKeyStrength
 import net.lingala.zip4j.model.enums.EncryptionMethod
-import tachiyomi.core.common.util.system.ImageUtil
-import tachiyomi.core.common.util.system.logcat
 import uy.kohesive.injekt.injectLazy
 import java.io.ByteArrayInputStream
 import java.io.ByteArrayOutputStream
@@ -136,12 +126,15 @@ object CbzCrypto {
     }
 
     fun getDecryptedPasswordCbz(): CharArray {
-        return decrypt(securityPreferences.cbzPassword().get(), ALIAS_CBZ).toCharArray()
+        val encryptedPassword = securityPreferences.cbzPassword().get()
+        if (encryptedPassword.isBlank()) error("This archive is encrypted please set a password")
+
+        return decrypt(encryptedPassword, ALIAS_CBZ).toCharArray()
     }
 
     private fun generateAndEncryptSqlPw() {
         val charPool: List<Char> = ('a'..'z') + ('A'..'Z') + ('0'..'9')
-        val password = (1..32).map {
+        val password = (1..SQL_PASSWORD_LENGTH).map {
             charPool[SecureRandom().nextInt(charPool.size)]
         }.joinToString("", transform = { it.toString() })
         securityPreferences.sqlPassword().set(encrypt(password, encryptionCipherSql))
@@ -152,27 +145,6 @@ object CbzCrypto {
         return decrypt(securityPreferences.sqlPassword().get(), ALIAS_SQL).toByteArray()
     }
 
-    /**
-     * Function that returns true when the supplied password
-     * can Successfully decrypt the supplied zip archive
-     * not very elegant but this is the solution recommended by the maintainer for checking passwords
-     * a real password check will likely be implemented in the future though
-     */
-    fun checkCbzPassword(zip4j: ZipFile, password: CharArray): Boolean {
-        try {
-            zip4j.setPassword(password)
-            zip4j.use { zip ->
-                zip.getInputStream(zip.fileHeaders.firstOrNull())
-            }
-            return true
-        } catch (e: Exception) {
-            logcat(LogPriority.WARN) {
-                "Wrong CBZ archive password for: ${zip4j.file.name} in: ${zip4j.file.parentFile?.name}"
-            }
-        }
-        return false
-    }
-
     fun isPasswordSet(): Boolean {
         return securityPreferences.cbzPassword().get().isNotEmpty()
     }
@@ -228,133 +200,6 @@ object CbzCrypto {
         }
         return String(bytes).contains(DEFAULT_COVER_NAME, ignoreCase = true)
     }
-
-    fun UniFile.isEncryptedZip(): Boolean {
-        return try {
-            val stream = ZipInputStream(this.openInputStream())
-            stream.nextEntry
-            stream.close()
-            false
-        } catch (zipException: ZipException) {
-            if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
-                true
-            } else throw zipException
-        }
-    }
-
-    fun UniFile.testCbzPassword(): Boolean {
-        return try {
-            val stream = ZipInputStream(this.openInputStream())
-            stream.setPassword(getDecryptedPasswordCbz())
-            stream.nextEntry
-            stream.close()
-            true
-        } catch (zipException: ZipException) {
-            if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
-                false
-            } else throw zipException
-        }
-    }
-
-    fun UniFile.addStreamToZip(inputStream: InputStream, filename: String, password: CharArray? = null) {
-        val zipOutputStream =
-            if (password != null) ZipOutputStream(this.openOutputStream(), password)
-            else ZipOutputStream(this.openOutputStream())
-
-        val zipParameters = ZipParameters()
-        zipParameters.fileNameInZip = filename
-
-        if (password != null) setZipParametersEncrypted(zipParameters)
-        zipOutputStream.putNextEntry(zipParameters)
-
-        zipOutputStream.use { output ->
-            inputStream.use { input ->
-                input.copyTo(output)
-            }
-        }
-    }
-
-
-    fun UniFile.addFilesToZip(files: List<UniFile>, password: CharArray? = null) {
-        val zipOutputStream =
-            if (password != null) ZipOutputStream(this.openOutputStream(), password)
-            else ZipOutputStream(this.openOutputStream())
-
-
-        files.forEach {
-            val zipParameters = ZipParameters()
-            if (password != null) setZipParametersEncrypted(zipParameters)
-            zipParameters.fileNameInZip = it.name
-
-            zipOutputStream.putNextEntry(zipParameters)
-
-            it.openInputStream().use { input ->
-                input.copyTo(zipOutputStream)
-            }
-            zipOutputStream.closeEntry()
-        }
-        zipOutputStream.close()
-    }
-
-    fun UniFile.getZipInputStream(filename: String): InputStream? {
-        val zipInputStream = ZipInputStream(this.openInputStream())
-        var fileHeader: LocalFileHeader?
-
-        if (this.isEncryptedZip()) zipInputStream.setPassword(getDecryptedPasswordCbz())
-
-        try {
-            while (run {
-                    fileHeader = zipInputStream.nextEntry
-                    fileHeader != null
-                }) {
-                if (fileHeader?.fileName == filename) return zipInputStream
-            }
-
-        } catch (zipException: ZipException) {
-            if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
-                logcat(LogPriority.WARN) {
-                    "Wrong CBZ archive password for: ${this.name} in: ${this.parentFile?.name}"
-                }
-            } else throw zipException
-        }
-        return null
-    }
-    fun UniFile.getCoverStreamFromZip(): InputStream? {
-        val zipInputStream = ZipInputStream(this.openInputStream())
-        var fileHeader: LocalFileHeader?
-        val fileHeaderList: MutableList<LocalFileHeader?> = mutableListOf()
-
-        if (this.isEncryptedZip()) zipInputStream.setPassword(getDecryptedPasswordCbz())
-
-        try {
-            while (run {
-                    fileHeader = zipInputStream.nextEntry
-                    fileHeader != null
-                }) {
-                fileHeaderList.add(fileHeader)
-            }
-
-            var coverHeader = fileHeaderList
-                .mapNotNull { it }
-                .sortedWith { f1, f2 -> f1.fileName.compareToCaseInsensitiveNaturalOrder(f2.fileName) }
-                .find { !it.isDirectory && ImageUtil.isImage(it.fileName) }
-
-
-            val coverStream = coverHeader?.fileName?.let { this.getZipInputStream(it) }
-            if (coverStream != null) {
-                if (!ImageUtil.isImage(coverHeader?.fileName) { coverStream }) coverHeader = null
-            }
-            return coverHeader?.fileName?.let { getZipInputStream(it) }
-
-        } catch (zipException: ZipException) {
-            if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
-                logcat(LogPriority.WARN) {
-                    "Wrong CBZ archive password for: ${this.name} in: ${this.parentFile?.name}"
-                }
-                return null
-            } else throw zipException
-        }
-    }
 }
 
 private const val BUFFER_SIZE = 2048
@@ -369,4 +214,6 @@ private const val CRYPTO_SETTINGS = "$ALGORITHM/$BLOCK_MODE/$PADDING"
 private const val KEYSTORE = "AndroidKeyStore"
 private const val ALIAS_CBZ = "cbzPw"
 private const val ALIAS_SQL = "sqlPw"
+
+private const val SQL_PASSWORD_LENGTH = 32
 // SY <--

core/common/src/main/kotlin/eu/kanade/tachiyomi/util/storage/EpubFile.kt

@@ -1,22 +1,36 @@
 package eu.kanade.tachiyomi.util.storage
 
+import android.content.Context
+import android.os.Build
+import com.hippo.unifile.UniFile
+import org.apache.commons.compress.archivers.zip.ZipArchiveEntry
+import org.apache.commons.compress.archivers.zip.ZipFile
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
+import tachiyomi.core.common.storage.UniFileTempFileManager
+import tachiyomi.core.common.storage.openReadOnlyChannel
+import uy.kohesive.injekt.injectLazy
 import java.io.Closeable
 import java.io.File
 import java.io.InputStream
-import java.util.zip.ZipEntry
-import java.util.zip.ZipFile
 
 /**
  * Wrapper over ZipFile to load files in epub format.
  */
-class EpubFile(file: File) : Closeable {
+// SY -->
+class EpubFile(file: UniFile, context: Context) : Closeable {
+
+    private val tempFileManager: UniFileTempFileManager by injectLazy()
 
     /**
      * Zip file of this epub.
      */
-    private val zip = ZipFile(file)
+    private val zip = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
+        ZipFile(tempFileManager.createTempFile(file))
+    } else {
+        ZipFile(file.openReadOnlyChannel(context))
+    }
+    // SY <--
 
     /**
      * Path separator used by this epub.
@@ -33,14 +47,14 @@ class EpubFile(file: File) : Closeable {
     /**
      * Returns an input stream for reading the contents of the specified zip file entry.
      */
-    fun getInputStream(entry: ZipEntry): InputStream {
+    fun getInputStream(entry: ZipArchiveEntry): InputStream {
         return zip.getInputStream(entry)
     }
 
     /**
      * Returns the zip file entry for the specified name, or null if not found.
      */
-    fun getEntry(name: String): ZipEntry? {
+    fun getEntry(name: String): ZipArchiveEntry? {
         return zip.getEntry(name)
     }
 

core/common/src/main/kotlin/tachiyomi/core/common/storage/UniFileExtensions.kt

@@ -1,6 +1,21 @@
 package tachiyomi.core.common.storage
 
+import android.content.Context
+import android.os.ParcelFileDescriptor
 import com.hippo.unifile.UniFile
+import eu.kanade.tachiyomi.util.lang.compareToCaseInsensitiveNaturalOrder
+import eu.kanade.tachiyomi.util.storage.CbzCrypto
+import logcat.LogPriority
+import net.lingala.zip4j.exception.ZipException
+import net.lingala.zip4j.io.inputstream.ZipInputStream
+import net.lingala.zip4j.io.outputstream.ZipOutputStream
+import net.lingala.zip4j.model.LocalFileHeader
+import net.lingala.zip4j.model.ZipParameters
+import tachiyomi.core.common.util.system.ImageUtil
+import tachiyomi.core.common.util.system.logcat
+import java.io.File
+import java.io.InputStream
+import java.nio.channels.FileChannel
 
 val UniFile.extension: String?
     get() = name?.substringAfterLast('.')
@@ -10,3 +25,201 @@ val UniFile.nameWithoutExtension: String?
 
 val UniFile.displayablePath: String
     get() = filePath ?: uri.toString()
+
+fun UniFile.openReadOnlyChannel(context: Context): FileChannel {
+    return ParcelFileDescriptor.AutoCloseInputStream(context.contentResolver.openFileDescriptor(uri, "r")).channel
+// SY -->
+}
+
+fun UniFile.isEncryptedZip(): Boolean {
+    return try {
+        val stream = ZipInputStream(this.openInputStream())
+        stream.nextEntry
+        stream.close()
+        false
+    } catch (zipException: ZipException) {
+        if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
+            true
+        } else {
+            throw zipException
+        }
+    }
+}
+
+fun UniFile.testCbzPassword(): Boolean {
+    return try {
+        val stream = ZipInputStream(this.openInputStream())
+        stream.setPassword(CbzCrypto.getDecryptedPasswordCbz())
+        stream.nextEntry
+        stream.close()
+        true
+    } catch (zipException: ZipException) {
+        if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
+            false
+        } else {
+            throw zipException
+        }
+    }
+}
+
+fun UniFile.addStreamToZip(inputStream: InputStream, filename: String, password: CharArray? = null) {
+    val zipOutputStream =
+        if (password != null) {
+            ZipOutputStream(this.openOutputStream(), password)
+        } else {
+            ZipOutputStream(this.openOutputStream())
+        }
+
+    val zipParameters = ZipParameters()
+    zipParameters.fileNameInZip = filename
+
+    if (password != null) CbzCrypto.setZipParametersEncrypted(zipParameters)
+    zipOutputStream.putNextEntry(zipParameters)
+
+    zipOutputStream.use { output ->
+        inputStream.use { input ->
+            input.copyTo(output)
+        }
+    }
+}
+
+/**
+ * Unzips encrypted or unencrypted zip files using zip4j.
+ * The caller is responsible to ensure, that the file this is called from is a zip archive
+ */
+fun UniFile.unzip(destination: File, onlyCopyImages: Boolean = false) {
+    destination.mkdirs()
+    if (!destination.isDirectory) return
+
+    val zipInputStream = ZipInputStream(this.openInputStream())
+    var fileHeader: LocalFileHeader?
+
+    if (this.isEncryptedZip()) {
+        zipInputStream.setPassword(CbzCrypto.getDecryptedPasswordCbz())
+    }
+    try {
+        while (
+            run {
+                fileHeader = zipInputStream.nextEntry
+                fileHeader != null
+            }
+        ) {
+            val tmpFile = File("${destination.absolutePath}/${fileHeader!!.fileName}")
+
+            if (onlyCopyImages) {
+                if (!fileHeader!!.isDirectory && ImageUtil.isImage(fileHeader!!.fileName)) {
+                    tmpFile.createNewFile()
+                    tmpFile.outputStream().buffered().use { tmpOut ->
+                        zipInputStream.buffered().copyTo(tmpOut)
+                    }
+                }
+            } else {
+                if (!fileHeader!!.isDirectory && ImageUtil.isImage(fileHeader!!.fileName)) {
+                    tmpFile.createNewFile()
+                    tmpFile
+                        .outputStream()
+                        .buffered()
+                        .use { zipInputStream.buffered().copyTo(it) }
+                }
+            }
+        }
+        zipInputStream.close()
+    } catch (zipException: ZipException) {
+        if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
+            logcat(LogPriority.WARN) {
+                "Wrong CBZ archive password for: ${this.name} in: ${this.parentFile?.name}"
+            }
+        } else {
+            throw zipException
+        }
+    }
+}
+
+fun UniFile.addFilesToZip(files: List<UniFile>, password: CharArray? = null) {
+    val zipOutputStream =
+        if (password != null) {
+            ZipOutputStream(this.openOutputStream(), password)
+        } else {
+            ZipOutputStream(this.openOutputStream())
+        }
+
+    files.forEach {
+        val zipParameters = ZipParameters()
+        if (password != null) CbzCrypto.setZipParametersEncrypted(zipParameters)
+        zipParameters.fileNameInZip = it.name
+
+        zipOutputStream.putNextEntry(zipParameters)
+
+        it.openInputStream().use { input ->
+            input.copyTo(zipOutputStream)
+        }
+        zipOutputStream.closeEntry()
+    }
+    zipOutputStream.close()
+}
+
+fun UniFile.getZipInputStream(filename: String): InputStream? {
+    val zipInputStream = ZipInputStream(this.openInputStream())
+    var fileHeader: LocalFileHeader?
+
+    if (this.isEncryptedZip()) zipInputStream.setPassword(CbzCrypto.getDecryptedPasswordCbz())
+
+    try {
+        while (
+            run {
+                fileHeader = zipInputStream.nextEntry
+                fileHeader != null
+            }
+        ) {
+            if (fileHeader?.fileName == filename) return zipInputStream
+        }
+    } catch (zipException: ZipException) {
+        if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
+            logcat(LogPriority.WARN) {
+                "Wrong CBZ archive password for: ${this.name} in: ${this.parentFile?.name}"
+            }
+        } else {
+            throw zipException
+        }
+    }
+    return null
+}
+
+fun UniFile.getCoverStreamFromZip(): InputStream? {
+    val zipInputStream = ZipInputStream(this.openInputStream())
+    var fileHeader: LocalFileHeader?
+    val fileHeaderList: MutableList<LocalFileHeader?> = mutableListOf()
+
+    if (this.isEncryptedZip()) zipInputStream.setPassword(CbzCrypto.getDecryptedPasswordCbz())
+
+    try {
+        while (
+            run {
+                fileHeader = zipInputStream.nextEntry
+                fileHeader != null
+            }
+        ) {
+            fileHeaderList.add(fileHeader)
+        }
+        var coverHeader = fileHeaderList
+            .mapNotNull { it }
+            .sortedWith { f1, f2 -> f1.fileName.compareToCaseInsensitiveNaturalOrder(f2.fileName) }
+            .find { !it.isDirectory && ImageUtil.isImage(it.fileName) }
+
+        val coverStream = coverHeader?.fileName?.let { this.getZipInputStream(it) }
+        if (coverStream != null) {
+            if (!ImageUtil.isImage(coverHeader?.fileName) { coverStream }) coverHeader = null
+        }
+        return coverHeader?.fileName?.let { getZipInputStream(it) }
+    } catch (zipException: ZipException) {
+        if (zipException.type == ZipException.Type.WRONG_PASSWORD) {
+            logcat(LogPriority.WARN) {
+                "Wrong CBZ archive password for: ${this.name} in: ${this.parentFile?.name}"
+            }
+            return null
+        } else {
+            throw zipException
+        }
+    }
+}
+// SY <--

core/common/src/main/kotlin/tachiyomi/core/common/util/system/ImageUtil.kt

@@ -26,8 +26,6 @@ import androidx.core.graphics.red
 import androidx.exifinterface.media.ExifInterface
 import com.hippo.unifile.UniFile
 import logcat.LogPriority
-import net.lingala.zip4j.ZipFile
-import net.lingala.zip4j.model.FileHeader
 import tachiyomi.decoder.Format
 import tachiyomi.decoder.ImageDecoder
 import java.io.BufferedInputStream
@@ -133,20 +131,8 @@ object ImageUtil {
      *
      * @return true if the width is greater than the height
      */
-    fun isWideImage(
+    fun isWideImage(imageStream: BufferedInputStream): Boolean {
-        imageStream: BufferedInputStream,
+        val options = extractImageOptions(imageStream)
-        // SY -->
-        zip4jFile: ZipFile?,
-        zip4jEntry: FileHeader?,
-        // SY <--
-    ): Boolean {
-        val options = extractImageOptions(
-            imageStream,
-            // SY -->
-            zip4jFile,
-            zip4jEntry,
-            // SY <--
-        )
         return options.outWidth > options.outHeight
     }
 
@@ -271,19 +257,9 @@ object ImageUtil {
      *
      * @return true if the height:width ratio is greater than 3.
      */
-    private fun isTallImage(
+    private fun isTallImage(imageStream: InputStream): Boolean {
-        imageStream: InputStream,
-        // SY -->
-        zip4jFile: ZipFile?,
-        zip4jEntry: FileHeader?,
-        // SY <--
-    ): Boolean {
         val options = extractImageOptions(
             imageStream,
-            // SY -->
-            zip4jFile,
-            zip4jEntry,
-            // SY <--
             resetAfterExtraction = false,
         )
 
@@ -297,18 +273,9 @@ object ImageUtil {
         tmpDir: UniFile,
         imageFile: UniFile,
         filenamePrefix: String,
-        // SY -->
-        zip4jFile: ZipFile?,
-        zip4jEntry: FileHeader?,
-        // SY <--
     ): Boolean {
-        if (isAnimatedAndSupported(imageFile.openInputStream()) || !isTallImage(
+        if (isAnimatedAndSupported(imageFile.openInputStream()) ||
-                imageFile.openInputStream(),
+            !isTallImage(imageFile.openInputStream())
-                // SY -->
-                zip4jFile,
-                zip4jEntry,
-                // SY <--
-            )
         ) {
             return true
         }
@@ -321,10 +288,6 @@ object ImageUtil {
 
         val options = extractImageOptions(
             imageFile.openInputStream(),
-            // SY -->
-            zip4jFile,
-            zip4jEntry,
-            // SY <--
             resetAfterExtraction = false,
         ).apply {
             inJustDecodeBounds = false
@@ -641,18 +604,9 @@ object ImageUtil {
      */
     private fun extractImageOptions(
         imageStream: InputStream,
-        // SY -->
-        zip4jFile: ZipFile?,
-        zip4jEntry: FileHeader?,
-        // SY <--
         resetAfterExtraction: Boolean = true,
     ): BitmapFactory.Options {
-        // SY -->
+        imageStream.mark(Int.MAX_VALUE)
-        // zip4j does currently not support mark() and reset()
-        if (zip4jFile != null && zip4jEntry != null) return extractImageOptionsZip4j(zip4jFile, zip4jEntry)
-        // SY <--
-
-        imageStream.mark(imageStream.available() + 1)
 
         val imageBytes = imageStream.readBytes()
         val options = BitmapFactory.Options().apply { inJustDecodeBounds = true }
@@ -661,16 +615,6 @@ object ImageUtil {
         return options
     }
 
-    // SY -->
-    private fun extractImageOptionsZip4j(zip4jFile: ZipFile?, zip4jEntry: FileHeader?): BitmapFactory.Options {
-        zip4jFile?.getInputStream(zip4jEntry).use { imageStream ->
-            val imageBytes = imageStream?.readBytes()
-            val options = BitmapFactory.Options().apply { inJustDecodeBounds = true }
-            imageBytes?.size?.let { BitmapFactory.decodeByteArray(imageBytes, 0, it, options) }
-            return options
-        }
-    }
-
     /**
      * Creates random exif metadata used as padding to make
      * the size of files inside  CBZ archives unique

core/common/src/main/kotlin/tachiyomi/core/common/util/system/LogcatExtensions.kt

@@ -7,12 +7,22 @@ import logcat.logcat
 inline fun Any.logcat(
     priority: LogPriority = LogPriority.DEBUG,
     throwable: Throwable? = null,
+    tag: String? = null,
     message: () -> String = { "" },
 ) = logcat(priority = priority) {
-    var msg = message()
+    val logMessage = StringBuilder()
-    if (throwable != null) {
+
-        if (msg.isNotBlank()) msg += "\n"
+    if (!tag.isNullOrEmpty()) {
-        msg += throwable.asLog()
+        logMessage.append("[$tag] ")
     }
-    msg
+
+    val msg = message()
+    logMessage.append(msg)
+
+    if (throwable != null) {
+        if (msg.isNotBlank()) logMessage.append("\n")
+        logMessage.append(throwable.asLog())
+    }
+
+    logMessage.toString()
 }

data/src/main/java/tachiyomi/data/LibraryQuery.kt

@@ -32,13 +32,15 @@ private val mapper = { cursor: SqlCursor ->
         calculate_interval = cursor.getLong(20)!!,
         last_modified_at = cursor.getLong(21)!!,
         favorite_modified_at = cursor.getLong(22),
-        totalCount = cursor.getLong(23)!!,
+        version = cursor.getLong(23)!!,
-        readCount = cursor.getDouble(24)!!,
+        is_syncing = cursor.getLong(24)!!,
-        latestUpload = cursor.getLong(25)!!,
+        totalCount = cursor.getLong(25)!!,
-        chapterFetchedAt = cursor.getLong(26)!!,
+        readCount = cursor.getDouble(26)!!,
-        lastRead = cursor.getLong(27)!!,
+        latestUpload = cursor.getLong(27)!!,
-        bookmarkCount = cursor.getDouble(28)!!,
+        chapterFetchedAt = cursor.getLong(28)!!,
-        category = cursor.getLong(29)!!,
+        lastRead = cursor.getLong(29)!!,
+        bookmarkCount = cursor.getDouble(30)!!,
+        category = cursor.getLong(31)!!,
     )
 }
 

data/src/main/java/tachiyomi/data/chapter/ChapterMapper.kt

@@ -17,6 +17,9 @@ object ChapterMapper {
         dateFetch: Long,
         dateUpload: Long,
         lastModifiedAt: Long,
+        version: Long,
+        @Suppress("UNUSED_PARAMETER")
+        isSyncing: Long,
     ): Chapter = Chapter(
         id = id,
         mangaId = mangaId,
@@ -31,5 +34,6 @@ object ChapterMapper {
         chapterNumber = chapterNumber,
         scanlator = scanlator,
         lastModifiedAt = lastModifiedAt,
+        version = version
     )
 }

data/src/main/java/tachiyomi/data/chapter/ChapterRepositoryImpl.kt

@@ -29,6 +29,7 @@ class ChapterRepositoryImpl(
                         chapter.sourceOrder,
                         chapter.dateFetch,
                         chapter.dateUpload,
+                        chapter.version,
                     )
                     val lastInsertId = chaptersQueries.selectLastInsertedRowId().executeAsOne()
                     chapter.copy(id = lastInsertId)
@@ -64,6 +65,8 @@ class ChapterRepositoryImpl(
                     dateFetch = chapterUpdate.dateFetch,
                     dateUpload = chapterUpdate.dateUpload,
                     chapterId = chapterUpdate.id,
+                    version = chapterUpdate.version,
+                    isSyncing = 0,
                 )
             }
         }

data/src/main/java/tachiyomi/data/manga/MangaMapper.kt

@@ -6,6 +6,7 @@ import tachiyomi.domain.manga.model.Manga
 import tachiyomi.view.LibraryView
 
 object MangaMapper {
+    @Suppress("LongParameterList")
     fun mapManga(
         id: Long,
         source: Long,
@@ -33,6 +34,9 @@ object MangaMapper {
         calculateInterval: Long,
         lastModifiedAt: Long,
         favoriteModifiedAt: Long?,
+        version: Long,
+        @Suppress("UNUSED_PARAMETER")
+        isSyncing: Long,
     ): Manga = Manga(
         id = id,
         source = source,
@@ -58,8 +62,10 @@ object MangaMapper {
         initialized = initialized,
         lastModifiedAt = lastModifiedAt,
         favoriteModifiedAt = favoriteModifiedAt,
+        version = version,
     )
 
+    @Suppress("LongParameterList")
     fun mapLibraryManga(
         id: Long,
         source: Long,
@@ -87,6 +93,8 @@ object MangaMapper {
         calculateInterval: Long,
         lastModifiedAt: Long,
         favoriteModifiedAt: Long?,
+        version: Long,
+        isSyncing: Long,
         totalCount: Long,
         readCount: Double,
         latestUpload: Long,
@@ -121,6 +129,8 @@ object MangaMapper {
             calculateInterval,
             lastModifiedAt,
             favoriteModifiedAt,
+            version,
+            isSyncing,
         ),
         category = category,
         totalChapters = totalCount,
@@ -156,6 +166,7 @@ object MangaMapper {
                 fetchInterval = libraryView.calculate_interval.toInt(),
                 lastModifiedAt = libraryView.last_modified_at,
                 favoriteModifiedAt = libraryView.favorite_modified_at,
+                version = libraryView.version,
             ),
             category = libraryView.category,
             totalChapters = libraryView.totalCount,

data/src/main/java/tachiyomi/data/manga/MangaRepositoryImpl.kt

@@ -119,6 +119,7 @@ class MangaRepositoryImpl(
                 coverLastModified = manga.coverLastModified,
                 dateAdded = manga.dateAdded,
                 updateStrategy = manga.updateStrategy,
+                version = manga.version,
             )
             mangasQueries.selectLastInsertedRowId()
         }
@@ -168,6 +169,8 @@ class MangaRepositoryImpl(
                     dateAdded = value.dateAdded,
                     mangaId = value.id,
                     updateStrategy = value.updateStrategy?.let(UpdateStrategyColumnAdapter::encode),
+                    version = value.version,
+                    isSyncing = 0,
                 )
             }
         }

data/src/main/sqldelight/tachiyomi/data/chapters.sq

@@ -14,6 +14,8 @@ CREATE TABLE chapters(
     date_fetch INTEGER NOT NULL,
     date_upload INTEGER NOT NULL,
     last_modified_at INTEGER NOT NULL DEFAULT 0,
+    version INTEGER NOT NULL DEFAULT 0,
+    is_syncing INTEGER NOT NULL DEFAULT 0,
     FOREIGN KEY(manga_id) REFERENCES mangas (_id)
     ON DELETE CASCADE
 );
@@ -30,6 +32,22 @@ BEGIN
   WHERE _id = new._id;
 END;
 
+CREATE TRIGGER update_chapter_and_manga_version AFTER UPDATE ON chapters
+WHEN new.is_syncing = 0 AND (
+    new.read != old.read OR
+    new.bookmark != old.bookmark OR
+    new.last_page_read != old.last_page_read
+)
+BEGIN
+    -- Update the chapter version
+    UPDATE chapters SET version = version + 1
+    WHERE _id = new._id;
+
+    -- Update the manga version
+    UPDATE mangas SET version = version + 1
+    WHERE _id = new.manga_id AND (SELECT is_syncing FROM mangas WHERE _id = new.manga_id) = 0;
+END;
+
 getChapterById:
 SELECT *
 FROM chapters
@@ -97,9 +115,14 @@ removeChaptersWithIds:
 DELETE FROM chapters
 WHERE _id IN :chapterIds;
 
+resetIsSyncing:
+UPDATE chapters
+SET is_syncing = 0
+WHERE is_syncing = 1;
+
 insert:
-INSERT INTO chapters(manga_id, url, name, scanlator, read, bookmark, last_page_read, chapter_number, source_order, date_fetch, date_upload, last_modified_at)
+INSERT INTO chapters(manga_id, url, name, scanlator, read, bookmark, last_page_read, chapter_number, source_order, date_fetch, date_upload, last_modified_at, version, is_syncing)
-VALUES (:mangaId, :url, :name, :scanlator, :read, :bookmark, :lastPageRead, :chapterNumber, :sourceOrder, :dateFetch, :dateUpload, 0);
+VALUES (:mangaId, :url, :name, :scanlator, :read, :bookmark, :lastPageRead, :chapterNumber, :sourceOrder, :dateFetch, :dateUpload, 0, :version, 0);
 
 update:
 UPDATE chapters
@@ -113,7 +136,9 @@ SET manga_id = coalesce(:mangaId, manga_id),
     chapter_number = coalesce(:chapterNumber, chapter_number),
     source_order = coalesce(:sourceOrder, source_order),
     date_fetch = coalesce(:dateFetch, date_fetch),
-    date_upload = coalesce(:dateUpload, date_upload)
+    date_upload = coalesce(:dateUpload, date_upload),
+    version = coalesce(:version, version),
+    is_syncing = coalesce(:isSyncing, is_syncing)
 WHERE _id = :chapterId;
 
 selectLastInsertedRowId:

data/src/main/sqldelight/tachiyomi/data/mangas.sq

@@ -26,7 +26,9 @@ CREATE TABLE mangas(
     update_strategy INTEGER AS UpdateStrategy NOT NULL DEFAULT 0,
     calculate_interval INTEGER DEFAULT 0 NOT NULL,
     last_modified_at INTEGER NOT NULL DEFAULT 0,
-    favorite_modified_at INTEGER
+    favorite_modified_at INTEGER,
+    version INTEGER NOT NULL DEFAULT 0,
+    is_syncing INTEGER NOT NULL DEFAULT 0
 );
 
 CREATE INDEX library_favorite_index ON mangas(favorite) WHERE favorite = 1;
@@ -49,6 +51,16 @@ BEGIN
   WHERE _id = new._id;
 END;
 
+CREATE TRIGGER update_manga_version AFTER UPDATE ON mangas
+BEGIN
+    UPDATE mangas SET version = version + 1
+    WHERE _id = new._id AND new.is_syncing = 0 AND (
+        new.url != old.url OR
+        new.description != old.description OR
+        new.favorite != old.favorite
+    );
+END;
+
 getMangaById:
 SELECT *
 FROM mangas
@@ -112,6 +124,11 @@ resetViewerFlags:
 UPDATE mangas
 SET viewer = 0;
 
+resetIsSyncing:
+UPDATE mangas
+SET is_syncing = 0
+WHERE is_syncing = 1;
+
 getSourceIdsWithNonLibraryManga:
 SELECT source, COUNT(*) AS manga_count
 FROM mangas
@@ -135,8 +152,8 @@ WHERE favorite = 0 AND source IN :sourceIdsAND AND _id NOT IN (
 );
 
 insert:
-INSERT INTO mangas(source, url, artist, author, description, genre, title, status, thumbnail_url, favorite, last_update, next_update, initialized, viewer, chapter_flags, cover_last_modified, date_added, update_strategy, calculate_interval, last_modified_at)
+INSERT INTO mangas(source, url, artist, author, description, genre, title, status, thumbnail_url, favorite, last_update, next_update, initialized, viewer, chapter_flags, cover_last_modified, date_added, update_strategy, calculate_interval, last_modified_at, version)
-VALUES (:source, :url, :artist, :author, :description, :genre, :title, :status, :thumbnailUrl, :favorite, :lastUpdate, :nextUpdate, :initialized, :viewerFlags, :chapterFlags, :coverLastModified, :dateAdded, :updateStrategy, :calculateInterval, 0);
+VALUES (:source, :url, :artist, :author, :description, :genre, :title, :status, :thumbnailUrl, :favorite, :lastUpdate, :nextUpdate, :initialized, :viewerFlags, :chapterFlags, :coverLastModified, :dateAdded, :updateStrategy, :calculateInterval, 0, :version);
 
 update:
 UPDATE mangas SET
@@ -158,7 +175,9 @@ UPDATE mangas SET
     cover_last_modified = coalesce(:coverLastModified, cover_last_modified),
     date_added = coalesce(:dateAdded, date_added),
     update_strategy = coalesce(:updateStrategy, update_strategy),
-    calculate_interval = coalesce(:calculateInterval, calculate_interval)
+    calculate_interval = coalesce(:calculateInterval, calculate_interval),
+    version = coalesce(:version, version),
+    is_syncing = coalesce(:isSyncing, is_syncing)
 WHERE _id = :mangaId;
 
 selectLastInsertedRowId:

data/src/main/sqldelight/tachiyomi/data/mangas_categories.sq

@@ -2,25 +2,22 @@ CREATE TABLE mangas_categories(
     _id INTEGER NOT NULL PRIMARY KEY,
     manga_id INTEGER NOT NULL,
     category_id INTEGER NOT NULL,
-    last_modified_at INTEGER NOT NULL DEFAULT 0,
     FOREIGN KEY(category_id) REFERENCES categories (_id)
     ON DELETE CASCADE,
     FOREIGN KEY(manga_id) REFERENCES mangas (_id)
     ON DELETE CASCADE
 );
 
-CREATE TRIGGER update_last_modified_at_mangas_categories
+CREATE TRIGGER insert_manga_category_update_version AFTER INSERT ON mangas_categories
-AFTER UPDATE ON mangas_categories
-FOR EACH ROW
 BEGIN
-  UPDATE mangas_categories
+    UPDATE mangas
-  SET last_modified_at = strftime('%s', 'now')
+    SET version = version + 1
-  WHERE _id = new._id;
+    WHERE _id = new.manga_id AND (SELECT is_syncing FROM mangas WHERE _id = new.manga_id) = 0;
 END;
 
 insert:
-INSERT INTO mangas_categories(manga_id, category_id, last_modified_at)
+INSERT INTO mangas_categories(manga_id, category_id)
-VALUES (:mangaId, :categoryId, 0);
+VALUES (:mangaId, :categoryId);
 
 deleteMangaCategoryByMangaId:
 DELETE FROM mangas_categories

data/src/main/sqldelight/tachiyomi/migrations/31.sqm

@@ -0,0 +1,46 @@
+-- Mangas table
+ALTER TABLE mangas ADD COLUMN version INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE mangas ADD COLUMN is_syncing INTEGER NOT NULL DEFAULT 0;
+
+-- Chapters table
+ALTER TABLE chapters ADD COLUMN version INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE chapters ADD COLUMN is_syncing INTEGER NOT NULL DEFAULT 0;
+
+-- Mangas triggers
+DROP TRIGGER IF EXISTS update_manga_version;
+CREATE TRIGGER update_manga_version AFTER UPDATE ON mangas
+BEGIN
+    UPDATE mangas SET version = version + 1
+    WHERE _id = new._id AND new.is_syncing = 0 AND (
+        new.url != old.url OR
+        new.description != old.description OR
+        new.favorite != old.favorite
+    );
+END;
+
+-- Chapters triggers
+DROP TRIGGER IF EXISTS update_chapter_and_manga_version;
+CREATE TRIGGER update_chapter_and_manga_version AFTER UPDATE ON chapters
+WHEN new.is_syncing = 0 AND (
+    new.read != old.read OR
+    new.bookmark != old.bookmark OR
+    new.last_page_read != old.last_page_read
+)
+BEGIN
+    -- Update the chapter version
+    UPDATE chapters SET version = version + 1
+    WHERE _id = new._id;
+
+    -- Update the manga version
+    UPDATE mangas SET version = version + 1
+    WHERE _id = new.manga_id AND (SELECT is_syncing FROM mangas WHERE _id = new.manga_id) = 0;
+END;
+
+-- manga_categories table
+DROP TRIGGER IF EXISTS insert_manga_category_update_version;
+CREATE TRIGGER insert_manga_category_update_version AFTER INSERT ON mangas_categories
+BEGIN
+    UPDATE mangas
+    SET version = version + 1
+    WHERE _id = new.manga_id AND (SELECT is_syncing FROM mangas WHERE _id = new.manga_id) = 0;
+END;

domain/src/main/java/tachiyomi/domain/chapter/model/Chapter.kt

@@ -14,6 +14,7 @@ data class Chapter(
     val chapterNumber: Double,
     val scanlator: String?,
     val lastModifiedAt: Long,
+    val version: Long,
 ) {
     val isRecognizedNumber: Boolean
         get() = chapterNumber >= 0f
@@ -43,6 +44,7 @@ data class Chapter(
             chapterNumber = -1.0,
             scanlator = null,
             lastModifiedAt = 0,
+            version = 1,
         )
     }
 }

domain/src/main/java/tachiyomi/domain/chapter/model/ChapterUpdate.kt

@@ -13,6 +13,7 @@ data class ChapterUpdate(
     val dateUpload: Long? = null,
     val chapterNumber: Double? = null,
     val scanlator: String? = null,
+    val version: Long? = null,
 )
 
 fun Chapter.toChapterUpdate(): ChapterUpdate {
@@ -29,5 +30,6 @@ fun Chapter.toChapterUpdate(): ChapterUpdate {
         dateUpload,
         chapterNumber,
         scanlator,
+        version,
     )
 }