chore: setup project

2026-06-28 13:21:57 +07:00
commit dfca375a9b
73 changed files with 2723 additions and 0 deletions
@@ -0,0 +1,24 @@
+package dev.achmad.ledgerr
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("dev.achmad.ledgerr", appContext.packageName)
+    }
+}
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Ledgerr">
+        <activity
+            android:name=".ui.base.MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Ledgerr"
+            android:windowSoftInputMode="adjustResize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
@@ -0,0 +1,54 @@
+package dev.achmad.ledgerr.core.network
+
+import android.webkit.CookieManager
+import okhttp3.Cookie
+import okhttp3.CookieJar
+import okhttp3.HttpUrl
+
+class AndroidCookieJar : CookieJar {
+
+    private val manager = CookieManager.getInstance()
+
+    override fun saveFromResponse(url: HttpUrl, cookies: List<Cookie>) {
+        val urlString = url.toString()
+
+        cookies.forEach { manager.setCookie(urlString, it.toString()) }
+    }
+
+    override fun loadForRequest(url: HttpUrl): List<Cookie> {
+        return get(url)
+    }
+
+    fun get(url: HttpUrl): List<Cookie> {
+        val cookies = manager.getCookie(url.toString())
+
+        return if (cookies != null && cookies.isNotEmpty()) {
+            cookies.split(";").mapNotNull { Cookie.parse(url, it) }
+        } else {
+            emptyList()
+        }
+    }
+
+    fun remove(url: HttpUrl, cookieNames: List<String>? = null, maxAge: Int = -1): Int {
+        val urlString = url.toString()
+        val cookies = manager.getCookie(urlString) ?: return 0
+
+        fun List<String>.filterNames(): List<String> {
+            return if (cookieNames != null) {
+                this.filter { it in cookieNames }
+            } else {
+                this
+            }
+        }
+
+        return cookies.split(";")
+            .map { it.substringBefore("=") }
+            .filterNames()
+            .onEach { manager.setCookie(urlString, "$it=;Max-Age=$maxAge") }
+            .count()
+    }
+
+    fun removeAll() {
+        manager.removeAllCookies {}
+    }
+}
@@ -0,0 +1,56 @@
+package dev.achmad.ledgerr.core.network
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+import dev.achmad.ledgerr.core.network.interceptor.IgnoreGzipInterceptor
+import dev.achmad.ledgerr.core.network.interceptor.UncaughtExceptionInterceptor
+import okhttp3.Cache
+import okhttp3.OkHttpClient
+import okhttp3.brotli.BrotliInterceptor
+import okhttp3.logging.HttpLoggingInterceptor
+import java.io.File
+import java.util.concurrent.TimeUnit
+
+@SuppressLint("MissingPermission")
+class NetworkHelper(
+    private val context: Context,
+    private val isDebugBuild: Boolean,
+) {
+
+    private val connectivityManager = context
+        .getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+
+    val client: OkHttpClient = run {
+        val builder = OkHttpClient.Builder()
+            .connectTimeout(30, TimeUnit.SECONDS)
+            .readTimeout(30, TimeUnit.SECONDS)
+            .callTimeout(2, TimeUnit.MINUTES)
+            .cache(
+                Cache(
+                    directory = File(context.cacheDir, "network_cache"),
+                    maxSize = 5L * 1024 * 1024, // 5 MiB
+                ),
+            )
+            .addInterceptor(UncaughtExceptionInterceptor())
+            .addNetworkInterceptor(IgnoreGzipInterceptor())
+            .addNetworkInterceptor(BrotliInterceptor)
+
+        if (isDebugBuild) {
+            val httpLoggingInterceptor = HttpLoggingInterceptor().apply {
+                level = HttpLoggingInterceptor.Level.BODY
+            }
+            builder.addNetworkInterceptor(httpLoggingInterceptor)
+        }
+
+        builder.build()
+    }
+
+    fun isNetworkAvailable(): Boolean {
+        val network = connectivityManager.activeNetwork ?: return false
+        val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
+        return capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+    }
+
+}
@@ -0,0 +1,108 @@
+package dev.achmad.ledgerr.core.network
+
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.serialization.DeserializationStrategy
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.okio.decodeFromBufferedSource
+import kotlinx.serialization.serializer
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+import java.io.IOException
+import kotlin.coroutines.resumeWithException
+
+val jsonMime = "application/json; charset=utf-8".toMediaType()
+val json = Json { ignoreUnknownKeys = true }
+
+// Based on https://github.com/gildor/kotlin-coroutines-okhttp
+@OptIn(ExperimentalCoroutinesApi::class)
+private suspend fun Call.await(callStack: Array<StackTraceElement>): Response {
+    return suspendCancellableCoroutine { continuation ->
+        val callback =
+            object : Callback {
+                override fun onResponse(call: Call, response: Response) {
+                    continuation.resume(response) { _, _, _ ->
+                        response.body.close()
+                    }
+                }
+
+                override fun onFailure(call: Call, e: IOException) {
+                    // Don't bother with resuming the continuation if it is already cancelled.
+                    if (continuation.isCancelled) return
+                    val exception = IOException(e.message, e).apply { stackTrace = callStack }
+                    continuation.resumeWithException(exception)
+                }
+            }
+
+        enqueue(callback)
+
+        continuation.invokeOnCancellation {
+            try {
+                cancel()
+            } catch (ex: Throwable) {
+                // Ignore cancel exception
+            }
+        }
+    }
+}
+
+suspend fun Call.await(): Response {
+    val callStack = Exception().stackTrace.run { copyOfRange(1, size) }
+    return await(callStack)
+}
+
+/**
+ * @since extensions-lib 1.5
+ */
+suspend fun Call.awaitSuccess(): Response {
+    val callStack = Exception().stackTrace.run { copyOfRange(1, size) }
+    val response = await(callStack)
+    if (!response.isSuccessful) {
+        response.close()
+        throw HttpException(response.code).apply { stackTrace = callStack }
+    }
+    return response
+}
+
+fun OkHttpClient.newCachelessCallWithProgress(request: Request, listener: ProgressListener): Call {
+    val progressClient = newBuilder()
+        .cache(null)
+        .addNetworkInterceptor { chain ->
+            val originalResponse = chain.proceed(chain.request())
+            originalResponse.newBuilder()
+                .body(ProgressResponseBody(originalResponse.body, listener))
+                .build()
+        }
+        .build()
+
+    return progressClient.newCall(request)
+}
+
+context(_: Json)
+inline fun <reified T> Response.parseAs(): T {
+    return decodeFromJsonResponse(serializer(), this)
+}
+
+context(json: Json)
+fun <T> decodeFromJsonResponse(
+    deserializer: DeserializationStrategy<T>,
+    response: Response,
+): T {
+    return response.body.source().use {
+        json.decodeFromBufferedSource(deserializer, it)
+    }
+}
+
+/**
+ * Exception that handles HTTP codes considered not successful by OkHttp.
+ * Use it to have a standardized error message in the app across the extensions.
+ *
+ * @since extensions-lib 1.5
+ * @param code [Int] the HTTP status code
+ */
+class HttpException(val code: Int) : IllegalStateException("HTTP error $code")
@@ -0,0 +1,5 @@
+package dev.achmad.ledgerr.core.network
+
+interface ProgressListener {
+    fun update(bytesRead: Long, contentLength: Long, done: Boolean)
+}
@@ -0,0 +1,51 @@
+package dev.achmad.ledgerr.core.network
+
+import okhttp3.MediaType
+import okhttp3.ResponseBody
+import okio.Buffer
+import okio.BufferedSource
+import okio.ForwardingSource
+import okio.Source
+import okio.buffer
+import java.io.IOException
+
+class ProgressResponseBody(
+    private val responseBody: ResponseBody,
+    private val progressListener: ProgressListener,
+) : ResponseBody() {
+
+    private val bufferedSource: BufferedSource by lazy {
+        source(responseBody.source()).buffer()
+    }
+
+    override fun contentType(): MediaType? {
+        return responseBody.contentType()
+    }
+
+    override fun contentLength(): Long {
+        return responseBody.contentLength()
+    }
+
+    override fun source(): BufferedSource {
+        return bufferedSource
+    }
+
+    private fun source(source: Source): Source {
+        return object : ForwardingSource(source) {
+            var totalBytesRead = 0L
+
+            @Throws(IOException::class)
+            override fun read(sink: Buffer, byteCount: Long): Long {
+                val bytesRead = super.read(sink, byteCount)
+                // read() returns the number of bytes read, or -1 if this source is exhausted.
+                totalBytesRead += if (bytesRead != -1L) bytesRead else 0
+                progressListener.update(
+                    totalBytesRead,
+                    responseBody.contentLength(),
+                    bytesRead == -1L,
+                )
+                return bytesRead
+            }
+        }
+    }
+}
@@ -0,0 +1,92 @@
+package dev.achmad.ledgerr.core.network
+
+import okhttp3.CacheControl
+import okhttp3.FormBody
+import okhttp3.Headers
+import okhttp3.HttpUrl
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.Request
+import okhttp3.RequestBody
+import java.util.concurrent.TimeUnit.MINUTES
+
+private val DEFAULT_CACHE_CONTROL = CacheControl.Builder().maxAge(10, MINUTES).build()
+private val DEFAULT_HEADERS = Headers.Builder().build()
+private val DEFAULT_BODY: RequestBody = FormBody.Builder().build()
+
+fun GET(
+    url: String,
+    headers: Headers = DEFAULT_HEADERS,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL,
+): Request {
+    return GET(url.toHttpUrl(), headers, cache)
+}
+
+/**
+ * @since extensions-lib 1.4
+ */
+fun GET(
+    url: HttpUrl,
+    headers: Headers = DEFAULT_HEADERS,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL,
+): Request {
+    return Request.Builder()
+        .url(url)
+        .headers(headers)
+        .cacheControl(cache)
+        .build()
+}
+
+fun POST(
+    url: String,
+    headers: Headers = DEFAULT_HEADERS,
+    body: RequestBody = DEFAULT_BODY,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL,
+): Request {
+    return Request.Builder()
+        .url(url)
+        .post(body)
+        .headers(headers)
+        .cacheControl(cache)
+        .build()
+}
+
+fun PUT(
+    url: String,
+    headers: Headers = DEFAULT_HEADERS,
+    body: RequestBody = DEFAULT_BODY,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL,
+): Request {
+    return Request.Builder()
+        .url(url)
+        .put(body)
+        .headers(headers)
+        .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,
+    headers: Headers = DEFAULT_HEADERS,
+    body: RequestBody = DEFAULT_BODY,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL,
+): Request {
+    return Request.Builder()
+        .url(url)
+        .delete(body)
+        .headers(headers)
+        .cacheControl(cache)
+        .build()
+}
@@ -0,0 +1,21 @@
+package dev.achmad.ledgerr.core.network.interceptor
+
+import okhttp3.Interceptor
+import okhttp3.Response
+
+/**
+ * To use [okhttp3.brotli.BrotliInterceptor] as a network interceptor,
+ * add [IgnoreGzipInterceptor] right before it.
+ *
+ * This nullifies the transparent gzip of [okhttp3.internal.http.BridgeInterceptor]
+ * so gzip and Brotli are explicitly handled by the [okhttp3.brotli.BrotliInterceptor].
+ */
+class IgnoreGzipInterceptor : Interceptor {
+    override fun intercept(chain: Interceptor.Chain): Response {
+        var request = chain.request()
+        if (request.header("Accept-Encoding")?.contains("gzip") == true) {
+            request = request.newBuilder().removeHeader("Accept-Encoding").build()
+        }
+        return chain.proceed(request)
+    }
+}
@@ -0,0 +1,128 @@
+package dev.achmad.ledgerr.core.network.interceptor
+
+import android.os.SystemClock
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import okhttp3.Response
+import java.io.IOException
+import java.util.ArrayDeque
+import java.util.concurrent.Semaphore
+import java.util.concurrent.TimeUnit
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.seconds
+import kotlin.time.toDuration
+import kotlin.time.toDurationUnit
+
+/**
+ * An OkHttp interceptor that handles rate limiting.
+ *
+ * This uses `java.time` APIs and is the legacy method, kept
+ * for compatibility reasons with existing extensions.
+ *
+ * Examples:
+ *
+ * permits = 5,  period = 1, unit = seconds  =>  5 requests per second
+ * permits = 10, period = 2, unit = minutes  =>  10 requests per 2 minutes
+ *
+ * @since extension-lib 1.3
+ *
+ * @param permits [Int]   Number of requests allowed within a period of units.
+ * @param period [Long]   The limiting duration. Defaults to 1.
+ * @param unit [TimeUnit] The unit of time for the period. Defaults to seconds.
+ */
+@Deprecated("Use the version with kotlin.time APIs instead.")
+fun OkHttpClient.Builder.rateLimit(
+    permits: Int,
+    period: Long = 1,
+    unit: TimeUnit = TimeUnit.SECONDS,
+) = addInterceptor(RateLimitInterceptor(null, permits, period.toDuration(unit.toDurationUnit())))
+
+/**
+ * An OkHttp interceptor that handles rate limiting.
+ *
+ * Examples:
+ *
+ * permits = 5,  period = 1.seconds  =>  5 requests per second
+ * permits = 10, period = 2.minutes  =>  10 requests per 2 minutes
+ *
+ * @since extension-lib 1.5
+ *
+ * @param permits [Int]     Number of requests allowed within a period of units.
+ * @param period [Duration] The limiting duration. Defaults to 1.seconds.
+ */
+fun OkHttpClient.Builder.rateLimit(permits: Int, period: Duration = 1.seconds) =
+    addInterceptor(RateLimitInterceptor(null, permits, period))
+
+/** We can probably accept domains or wildcards by comparing with [endsWith], etc. */
+@Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
+internal class RateLimitInterceptor(
+    private val host: String?,
+    private val permits: Int,
+    period: Duration,
+) : Interceptor {
+
+    private val requestQueue = ArrayDeque<Long>(permits)
+    private val rateLimitMillis = period.inWholeMilliseconds
+    private val fairLock = Semaphore(1, true)
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val call = chain.call()
+        if (call.isCanceled()) throw IOException("Canceled")
+
+        val request = chain.request()
+        when (host) {
+            null, request.url.host -> {} // need rate limit
+            else -> return chain.proceed(request)
+        }
+
+        try {
+            fairLock.acquire()
+        } catch (e: InterruptedException) {
+            throw IOException(e)
+        }
+
+        val requestQueue = this.requestQueue
+        val timestamp: Long
+
+        try {
+            synchronized(requestQueue) {
+                while (requestQueue.size >= permits) { // queue is full, remove expired entries
+                    val periodStart = SystemClock.elapsedRealtime() - rateLimitMillis
+                    var hasRemovedExpired = false
+                    while (!requestQueue.isEmpty() && requestQueue.first <= periodStart) {
+                        requestQueue.removeFirst()
+                        hasRemovedExpired = true
+                    }
+                    if (call.isCanceled()) {
+                        throw IOException("Canceled")
+                    } else if (hasRemovedExpired) {
+                        break
+                    } else {
+                        try { // wait for the first entry to expire, or notified by cached response
+                            (requestQueue as Object).wait(requestQueue.first - periodStart)
+                        } catch (_: InterruptedException) {
+                            continue
+                        }
+                    }
+                }
+
+                // add request to queue
+                timestamp = SystemClock.elapsedRealtime()
+                requestQueue.addLast(timestamp)
+            }
+        } finally {
+            fairLock.release()
+        }
+
+        val response = chain.proceed(request)
+        if (response.networkResponse == null) { // response is cached, remove it from queue
+            synchronized(requestQueue) {
+                if (requestQueue.isEmpty() || timestamp < requestQueue.first) return@synchronized
+                requestQueue.removeFirstOccurrence(timestamp)
+                (requestQueue as Object).notifyAll()
+            }
+        }
+
+        return response
+    }
+}
@@ -0,0 +1,77 @@
+package dev.achmad.ledgerr.core.network.interceptor
+
+import okhttp3.HttpUrl
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
+import okhttp3.OkHttpClient
+import java.util.concurrent.TimeUnit
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.seconds
+import kotlin.time.toDuration
+import kotlin.time.toDurationUnit
+
+/**
+ * An OkHttp interceptor that handles given url host's rate limiting.
+ *
+ * This uses Java Time APIs and is the legacy method, kept
+ * for compatibility reasons with existing extensions.
+ *
+ * Examples:
+ *
+ * httpUrl = "api.manga.com".toHttpUrlOrNull(), permits = 5, period = 1, unit = seconds  =>  5 requests per second to api.manga.com
+ * httpUrl = "imagecdn.manga.com".toHttpUrlOrNull(), permits = 10, period = 2, unit = minutes  =>  10 requests per 2 minutes to imagecdn.manga.com
+ *
+ * @since extension-lib 1.3
+ *
+ * @param httpUrl [HttpUrl] The url host that this interceptor should handle. Will get url's host by using HttpUrl.host()
+ * @param permits [Int]     Number of requests allowed within a period of units.
+ * @param period [Long]     The limiting duration. Defaults to 1.
+ * @param unit [TimeUnit]   The unit of time for the period. Defaults to seconds.
+ */
+@Deprecated("Use the version with kotlin.time APIs instead.")
+fun OkHttpClient.Builder.rateLimitHost(
+    httpUrl: HttpUrl,
+    permits: Int,
+    period: Long = 1,
+    unit: TimeUnit = TimeUnit.SECONDS,
+) = addInterceptor(
+    RateLimitInterceptor(httpUrl.host, permits, period.toDuration(unit.toDurationUnit())),
+)
+
+/**
+ * An OkHttp interceptor that handles given url host's rate limiting.
+ *
+ * Examples:
+ *
+ * httpUrl = "https://api.manga.com".toHttpUrlOrNull(), permits = 5, period = 1.seconds =>  5 requests per second to api.manga.com
+ * httpUrl = "https://imagecdn.manga.com".toHttpUrlOrNull(), permits = 10, period = 2.minutes  =>  10 requests per 2 minutes to imagecdn.manga.com
+ *
+ * @since extension-lib 1.5
+ *
+ * @param httpUrl [HttpUrl] The url host that this interceptor should handle. Will get url's host by using HttpUrl.host()
+ * @param permits [Int]     Number of requests allowed within a period of units.
+ * @param period [Duration] The limiting duration. Defaults to 1.seconds.
+ */
+@Suppress("UNUSED")
+fun OkHttpClient.Builder.rateLimitHost(
+    httpUrl: HttpUrl,
+    permits: Int,
+    period: Duration = 1.seconds,
+) = addInterceptor(RateLimitInterceptor(httpUrl.host, permits, period))
+
+/**
+ * An OkHttp interceptor that handles given url host's rate limiting.
+ *
+ * Examples:
+ *
+ * url = "https://api.manga.com", permits = 5, period = 1.seconds =>  5 requests per second to api.manga.com
+ * url = "https://imagecdn.manga.com", permits = 10, period = 2.minutes  =>  10 requests per 2 minutes to imagecdn.manga.com
+ *
+ * @since extension-lib 1.5
+ *
+ * @param url [String]      The url host that this interceptor should handle. Will get url's host by using HttpUrl.host()
+ * @param permits [Int]     Number of requests allowed within a period of units.
+ * @param period [Duration] The limiting duration. Defaults to 1.seconds.
+ */
+@Suppress("UNUSED")
+fun OkHttpClient.Builder.rateLimitHost(url: String, permits: Int, period: Duration = 1.seconds) =
+    addInterceptor(RateLimitInterceptor(url.toHttpUrlOrNull()?.host, permits, period))
@@ -0,0 +1,28 @@
+package dev.achmad.ledgerr.core.network.interceptor
+
+import okhttp3.Interceptor
+import okhttp3.Response
+import java.io.IOException
+
+/**
+ * Catches any uncaught exceptions from later in the chain and rethrows as a non-fatal
+ * IOException to avoid catastrophic failure.
+ *
+ * This should be the first interceptor in the client.
+ *
+ * See https://square.github.io/okhttp/4.x/okhttp/okhttp3/-interceptor/
+ */
+class UncaughtExceptionInterceptor : Interceptor {
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        return try {
+            chain.proceed(chain.request())
+        } catch (e: Exception) {
+            if (e is IOException) {
+                throw e
+            } else {
+                throw IOException(e)
+            }
+        }
+    }
+}
@@ -0,0 +1,24 @@
+package dev.achmad.ledgerr.core.network.interceptor
+
+import okhttp3.Interceptor
+import okhttp3.Response
+
+class UserAgentInterceptor(
+    private val defaultUserAgentProvider: () -> String,
+) : Interceptor {
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val originalRequest = chain.request()
+
+        return if (originalRequest.header("User-Agent").isNullOrEmpty()) {
+            val newRequest = originalRequest
+                .newBuilder()
+                .removeHeader("User-Agent")
+                .addHeader("User-Agent", defaultUserAgentProvider())
+                .build()
+            chain.proceed(newRequest)
+        } else {
+            chain.proceed(originalRequest)
+        }
+    }
+}
@@ -0,0 +1,215 @@
+package dev.achmad.ledgerr.core.preference
+
+import android.content.SharedPreferences
+import android.content.SharedPreferences.Editor
+import android.util.Log
+import androidx.core.content.edit
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.conflate
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.flow.stateIn
+
+sealed class AndroidPreference<T>(
+    private val preferences: SharedPreferences,
+    private val keyFlow: Flow<String?>,
+    private val key: String,
+    private val defaultValue: T,
+) : Preference<T> {
+
+    abstract fun read(preferences: SharedPreferences, key: String, defaultValue: T): T
+
+    abstract fun write(key: String, value: T): Editor.() -> Unit
+
+    override fun key(): String {
+        return key
+    }
+
+    override fun get(): T {
+        return try {
+            read(preferences, key, defaultValue)
+        } catch (e: ClassCastException) {
+            Log.e("AndroidPreference", "Invalid value for $key; deleting")
+            delete()
+            defaultValue
+        }
+    }
+
+    override fun set(value: T) {
+        preferences.edit(action = write(key, value))
+    }
+
+    override fun isSet(): Boolean {
+        return preferences.contains(key)
+    }
+
+    override fun delete() {
+        preferences.edit {
+            remove(key)
+        }
+    }
+
+    override fun defaultValue(): T {
+        return defaultValue
+    }
+
+    override fun changes(): Flow<T> {
+        return keyFlow
+            .filter { it == key || it == null }
+            .onStart { emit("ignition") }
+            .map { get() }
+            .conflate()
+    }
+
+    override fun stateIn(scope: CoroutineScope): StateFlow<T> {
+        return changes().stateIn(scope, SharingStarted.Eagerly, get())
+    }
+
+    class StringPrimitive(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: String,
+    ) : AndroidPreference<String>(preferences, keyFlow, key, defaultValue) {
+        override fun read(
+            preferences: SharedPreferences,
+            key: String,
+            defaultValue: String,
+        ): String {
+            return preferences.getString(key, defaultValue) ?: defaultValue
+        }
+
+        override fun write(key: String, value: String): Editor.() -> Unit = {
+            putString(key, value)
+        }
+    }
+
+    class LongPrimitive(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: Long,
+    ) : AndroidPreference<Long>(preferences, keyFlow, key, defaultValue) {
+        override fun read(preferences: SharedPreferences, key: String, defaultValue: Long): Long {
+            return preferences.getLong(key, defaultValue)
+        }
+
+        override fun write(key: String, value: Long): Editor.() -> Unit = {
+            putLong(key, value)
+        }
+    }
+
+    class IntPrimitive(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: Int,
+    ) : AndroidPreference<Int>(preferences, keyFlow, key, defaultValue) {
+        override fun read(preferences: SharedPreferences, key: String, defaultValue: Int): Int {
+            return preferences.getInt(key, defaultValue)
+        }
+
+        override fun write(key: String, value: Int): Editor.() -> Unit = {
+            putInt(key, value)
+        }
+    }
+
+    class FloatPrimitive(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: Float,
+    ) : AndroidPreference<Float>(preferences, keyFlow, key, defaultValue) {
+        override fun read(preferences: SharedPreferences, key: String, defaultValue: Float): Float {
+            return preferences.getFloat(key, defaultValue)
+        }
+
+        override fun write(key: String, value: Float): Editor.() -> Unit = {
+            putFloat(key, value)
+        }
+    }
+
+    class BooleanPrimitive(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: Boolean,
+    ) : AndroidPreference<Boolean>(preferences, keyFlow, key, defaultValue) {
+        override fun read(
+            preferences: SharedPreferences,
+            key: String,
+            defaultValue: Boolean,
+        ): Boolean {
+            return preferences.getBoolean(key, defaultValue)
+        }
+
+        override fun write(key: String, value: Boolean): Editor.() -> Unit = {
+            putBoolean(key, value)
+        }
+    }
+
+    class StringSetPrimitive(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: Set<String>,
+    ) : AndroidPreference<Set<String>>(preferences, keyFlow, key, defaultValue) {
+        override fun read(
+            preferences: SharedPreferences,
+            key: String,
+            defaultValue: Set<String>,
+        ): Set<String> {
+            return preferences.getStringSet(key, defaultValue) ?: defaultValue
+        }
+
+        override fun write(key: String, value: Set<String>): Editor.() -> Unit = {
+            putStringSet(key, value)
+        }
+    }
+
+    class ObjectAsString<T>(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: T,
+        private val serializer: (T) -> String,
+        private val deserializer: (String) -> T,
+    ) : AndroidPreference<T>(preferences, keyFlow, key, defaultValue) {
+        override fun read(preferences: SharedPreferences, key: String, defaultValue: T): T {
+            return try {
+                preferences.getString(key, null)?.let(deserializer) ?: defaultValue
+            } catch (e: Exception) {
+                defaultValue
+            }
+        }
+
+        override fun write(key: String, value: T): Editor.() -> Unit = {
+            putString(key, serializer(value))
+        }
+    }
+
+    class ObjectAsInt<T>(
+        preferences: SharedPreferences,
+        keyFlow: Flow<String?>,
+        key: String,
+        defaultValue: T,
+        private val serializer: (T) -> Int,
+        private val deserializer: (Int) -> T,
+    ) : AndroidPreference<T>(preferences, keyFlow, key, defaultValue) {
+        override fun read(preferences: SharedPreferences, key: String, defaultValue: T): T {
+            return try {
+                if (preferences.contains(key)) preferences.getInt(key, 0).let(deserializer) else defaultValue
+            } catch (e: Exception) {
+                defaultValue
+            }
+        }
+
+        override fun write(key: String, value: T): Editor.() -> Unit = {
+            putInt(key, serializer(value))
+        }
+    }
+}
@@ -0,0 +1,85 @@
+package dev.achmad.ledgerr.core.preference
+
+import android.content.SharedPreferences
+import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.flow.callbackFlow
+
+class AndroidPreferenceStore(
+    private val sharedPreferences: SharedPreferences,
+) : PreferenceStore {
+
+    private val keyFlow = sharedPreferences.keyFlow
+
+    override fun getString(key: String, defaultValue: String): Preference<String> {
+        return AndroidPreference.StringPrimitive(sharedPreferences, keyFlow, key, defaultValue)
+    }
+
+    override fun getLong(key: String, defaultValue: Long): Preference<Long> {
+        return AndroidPreference.LongPrimitive(sharedPreferences, keyFlow, key, defaultValue)
+    }
+
+    override fun getInt(key: String, defaultValue: Int): Preference<Int> {
+        return AndroidPreference.IntPrimitive(sharedPreferences, keyFlow, key, defaultValue)
+    }
+
+    override fun getFloat(key: String, defaultValue: Float): Preference<Float> {
+        return AndroidPreference.FloatPrimitive(sharedPreferences, keyFlow, key, defaultValue)
+    }
+
+    override fun getBoolean(key: String, defaultValue: Boolean): Preference<Boolean> {
+        return AndroidPreference.BooleanPrimitive(sharedPreferences, keyFlow, key, defaultValue)
+    }
+
+    override fun getStringSet(key: String, defaultValue: Set<String>): Preference<Set<String>> {
+        return AndroidPreference.StringSetPrimitive(sharedPreferences, keyFlow, key, defaultValue)
+    }
+
+    override fun <T> getObjectFromString(
+        key: String,
+        defaultValue: T,
+        serializer: (T) -> String,
+        deserializer: (String) -> T,
+    ): Preference<T> {
+        return AndroidPreference.ObjectAsString(
+            preferences = sharedPreferences,
+            keyFlow = keyFlow,
+            key = key,
+            defaultValue = defaultValue,
+            serializer = serializer,
+            deserializer = deserializer,
+        )
+    }
+
+    override fun <T> getObjectFromInt(
+        key: String,
+        defaultValue: T,
+        serializer: (T) -> Int,
+        deserializer: (Int) -> T,
+    ): Preference<T> {
+        return AndroidPreference.ObjectAsInt(
+            preferences = sharedPreferences,
+            keyFlow = keyFlow,
+            key = key,
+            defaultValue = defaultValue,
+            serializer = serializer,
+            deserializer = deserializer,
+        )
+    }
+
+    override fun getAll(): Map<String, *> {
+        return sharedPreferences.all ?: emptyMap<String, Any>()
+    }
+}
+
+private val SharedPreferences.keyFlow
+    get() = callbackFlow {
+        val listener = SharedPreferences.OnSharedPreferenceChangeListener { _, key: String? ->
+            trySend(
+                key,
+            )
+        }
+        registerOnSharedPreferenceChangeListener(listener)
+        awaitClose {
+            unregisterOnSharedPreferenceChangeListener(listener)
+        }
+    }
@@ -0,0 +1,47 @@
+package dev.achmad.ledgerr.core.preference
+
+sealed class CheckboxState<T>(open val value: T) {
+
+    abstract fun next(): CheckboxState<T>
+
+    sealed class State<T>(override val value: T) : CheckboxState<T>(value) {
+        data class Checked<T>(override val value: T) : State<T>(value)
+        data class None<T>(override val value: T) : State<T>(value)
+
+        val isChecked: Boolean
+            get() = this is Checked
+
+        override fun next(): CheckboxState<T> {
+            return when (this) {
+                is Checked -> None(value)
+                is None -> Checked(value)
+            }
+        }
+    }
+
+    sealed class TriState<T>(override val value: T) : CheckboxState<T>(value) {
+        data class Include<T>(override val value: T) : TriState<T>(value)
+        data class Exclude<T>(override val value: T) : TriState<T>(value)
+        data class None<T>(override val value: T) : TriState<T>(value)
+
+        override fun next(): CheckboxState<T> {
+            return when (this) {
+                is Exclude -> None(value)
+                is Include -> Exclude(value)
+                is None -> Include(value)
+            }
+        }
+    }
+}
+
+inline fun <T> T.asCheckboxState(condition: (T) -> Boolean): CheckboxState.State<T> {
+    return if (condition(this)) {
+        CheckboxState.State.Checked(this)
+    } else {
+        CheckboxState.State.None(this)
+    }
+}
+
+inline fun <T> List<T>.mapAsCheckboxState(condition: (T) -> Boolean): List<CheckboxState.State<T>> {
+    return this.map { it.asCheckboxState(condition) }
+}
@@ -0,0 +1,109 @@
+package dev.achmad.ledgerr.core.preference
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.stateIn
+
+/**
+ * Local-copy implementation of PreferenceStore mostly for test and preview purposes
+ */
+class InMemoryPreferenceStore(
+    initialPreferences: Sequence<InMemoryPreference<*>> = sequenceOf(),
+) : PreferenceStore {
+
+    private val preferences: Map<String, Preference<*>> =
+        initialPreferences.toList().associateBy { it.key() }
+
+    override fun getString(key: String, defaultValue: String): Preference<String> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: String? = preferences[key]?.get() as? String
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    override fun getLong(key: String, defaultValue: Long): Preference<Long> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: Long? = preferences[key]?.get() as? Long
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    override fun getInt(key: String, defaultValue: Int): Preference<Int> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: Int? = preferences[key]?.get() as? Int
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    override fun getFloat(key: String, defaultValue: Float): Preference<Float> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: Float? = preferences[key]?.get() as? Float
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    override fun getBoolean(key: String, defaultValue: Boolean): Preference<Boolean> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: Boolean? = preferences[key]?.get() as? Boolean
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    override fun getStringSet(key: String, defaultValue: Set<String>): Preference<Set<String>> {
+        TODO("Not yet implemented")
+    }
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T> getObjectFromString(
+        key: String,
+        defaultValue: T,
+        serializer: (T) -> String,
+        deserializer: (String) -> T,
+    ): Preference<T> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: T? = preferences[key]?.get() as? T
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T> getObjectFromInt(
+        key: String,
+        defaultValue: T,
+        serializer: (T) -> Int,
+        deserializer: (Int) -> T,
+    ): Preference<T> {
+        val default = InMemoryPreference(key, null, defaultValue)
+        val data: T? = preferences[key]?.get() as? T
+        return if (data == null) default else InMemoryPreference(key, data, defaultValue)
+    }
+
+    override fun getAll(): Map<String, *> {
+        return preferences
+    }
+
+    class InMemoryPreference<T>(
+        private val key: String,
+        private var data: T?,
+        private val defaultValue: T,
+    ) : Preference<T> {
+        override fun key(): String = key
+
+        override fun get(): T = data ?: defaultValue()
+
+        override fun isSet(): Boolean = data != null
+
+        override fun delete() {
+            data = null
+        }
+
+        override fun defaultValue(): T = defaultValue
+
+        override fun changes(): Flow<T> = flow { data }
+
+        override fun stateIn(scope: CoroutineScope): StateFlow<T> {
+            return changes().stateIn(scope, SharingStarted.Eagerly, get())
+        }
+
+        override fun set(value: T) {
+            data = value
+        }
+    }
+}
@@ -0,0 +1,71 @@
+package dev.achmad.ledgerr.core.preference
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.StateFlow
+
+interface Preference<T> {
+
+    fun key(): String
+
+    fun get(): T
+
+    fun set(value: T)
+
+    fun isSet(): Boolean
+
+    fun delete()
+
+    fun defaultValue(): T
+
+    fun changes(): Flow<T>
+
+    fun stateIn(scope: CoroutineScope): StateFlow<T>
+
+    companion object {
+        /**
+         * A preference that should not be exposed in places like backups without user consent.
+         */
+        fun isPrivate(key: String): Boolean {
+            return key.startsWith(PRIVATE_PREFIX)
+        }
+        fun privateKey(key: String): String {
+            return "$PRIVATE_PREFIX$key"
+        }
+
+        /**
+         * A preference used for internal app state that isn't really a user preference
+         * and therefore should not be in places like backups.
+         */
+        fun isAppState(key: String): Boolean {
+            return key.startsWith(APP_STATE_PREFIX)
+        }
+        fun appStateKey(key: String): String {
+            return "$APP_STATE_PREFIX$key"
+        }
+
+        private const val APP_STATE_PREFIX = "__APP_STATE_"
+        private const val PRIVATE_PREFIX = "__PRIVATE_"
+    }
+}
+
+inline fun <reified T, R : T> Preference<T>.getAndSet(crossinline block: (T) -> R) = set(
+    block(get()),
+)
+
+operator fun <T> Preference<Set<T>>.plusAssign(item: T) {
+    set(get() + item)
+}
+
+operator fun <T> Preference<Set<T>>.plusAssign(items: Iterable<T>) {
+    set(get() + items)
+}
+
+operator fun <T> Preference<Set<T>>.minusAssign(item: T) {
+    set(get() - item)
+}
+
+fun Preference<Boolean>.toggle(): Boolean {
+    set(!get())
+    return get()
+}
@@ -0,0 +1,62 @@
+package dev.achmad.ledgerr.core.preference
+
+interface PreferenceStore {
+
+    fun getString(key: String, defaultValue: String = ""): Preference<String>
+
+    fun getLong(key: String, defaultValue: Long = 0): Preference<Long>
+
+    fun getInt(key: String, defaultValue: Int = 0): Preference<Int>
+
+    fun getFloat(key: String, defaultValue: Float = 0f): Preference<Float>
+
+    fun getBoolean(key: String, defaultValue: Boolean = false): Preference<Boolean>
+
+    fun getStringSet(key: String, defaultValue: Set<String> = emptySet()): Preference<Set<String>>
+
+    fun <T> getObjectFromString(
+        key: String,
+        defaultValue: T,
+        serializer: (T) -> String,
+        deserializer: (String) -> T,
+    ): Preference<T>
+
+    fun <T> getObjectFromInt(
+        key: String,
+        defaultValue: T,
+        serializer: (T) -> Int,
+        deserializer: (Int) -> T,
+    ): Preference<T>
+
+    fun getAll(): Map<String, *>
+}
+
+fun PreferenceStore.getLongArray(
+    key: String,
+    defaultValue: List<Long>,
+): Preference<List<Long>> {
+    return getObjectFromString(
+        key = key,
+        defaultValue = defaultValue,
+        serializer = { it.joinToString(",") },
+        deserializer = { it.split(",").mapNotNull { l -> l.toLongOrNull() } },
+    )
+}
+
+inline fun <reified T : Enum<T>> PreferenceStore.getEnum(
+    key: String,
+    defaultValue: T,
+): Preference<T> {
+    return getObjectFromString(
+        key = key,
+        defaultValue = defaultValue,
+        serializer = { it.name },
+        deserializer = {
+            try {
+                enumValueOf(it)
+            } catch (e: IllegalArgumentException) {
+                defaultValue
+            }
+        },
+    )
+}
@@ -0,0 +1,16 @@
+package dev.achmad.ledgerr.core.preference
+
+enum class TriState {
+    DISABLED, // Disable filter
+    ENABLED_IS, // Enabled with "is" filter
+    ENABLED_NOT, // Enabled with "not" filter
+    ;
+
+    fun next(): TriState {
+        return when (this) {
+            DISABLED -> ENABLED_IS
+            ENABLED_IS -> ENABLED_NOT
+            ENABLED_NOT -> DISABLED
+        }
+    }
+}
@@ -0,0 +1,7 @@
+package dev.achmad.ledgerr.di
+
+import org.koin.dsl.module
+
+val coreModule = module {
+
+}
@@ -0,0 +1,7 @@
+package dev.achmad.ledgerr.di
+
+import org.koin.dsl.module
+
+val dataModule = module {
+
+}
@@ -0,0 +1,7 @@
+package dev.achmad.ledgerr.di
+
+import org.koin.dsl.module
+
+val domainModule = module {
+
+}
@@ -0,0 +1,7 @@
+package dev.achmad.ledgerr.di
+
+import org.koin.dsl.module
+
+val uiModule = module {
+
+}
@@ -0,0 +1,20 @@
+package dev.achmad.ledgerr.di.util
+
+import org.koin.core.qualifier.named
+import org.koin.mp.KoinPlatformTools
+
+inline fun <reified T : Any> injectLazy(): Lazy<T> {
+    return lazy { KoinPlatformTools.defaultContext().get().get(T::class) }
+}
+
+inline fun <reified T : Any> injectLazy(key: String): Lazy<T> {
+    return lazy { KoinPlatformTools.defaultContext().get().get(T::class, named(key)) }
+}
+
+inline fun <reified T : Any> inject(): T {
+    return KoinPlatformTools.defaultContext().get().get(T::class)
+}
+
+inline fun <reified T : Any> inject(key: String): T {
+    return KoinPlatformTools.defaultContext().get().get(T::class, named(key))
+}
@@ -0,0 +1,102 @@
+package dev.achmad.ledgerr.ui.base
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.view.View
+import android.view.ViewTreeObserver
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.ui.Modifier
+import androidx.core.util.Consumer
+import cafe.adriel.voyager.core.screen.Screen
+import cafe.adriel.voyager.core.stack.StackEvent
+import cafe.adriel.voyager.navigator.Navigator
+import cafe.adriel.voyager.navigator.NavigatorDisposeBehavior
+import cafe.adriel.voyager.transitions.ScreenTransition
+import dev.achmad.ledgerr.ui.screens.home.HomeScreen
+import dev.achmad.ledgerr.ui.theme.AppTheme
+import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.flow.callbackFlow
+import kotlinx.coroutines.flow.collectLatest
+import soup.compose.material.motion.animation.materialSharedAxisX
+import soup.compose.material.motion.animation.rememberSlideDistance
+
+class MainActivity : ComponentActivity() {
+
+    private var isReady = false
+    private var initialScreen: Screen = HomeScreen
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val content: View = findViewById(android.R.id.content)
+        content.viewTreeObserver.addOnPreDrawListener(
+            object : ViewTreeObserver.OnPreDrawListener {
+                override fun onPreDraw(): Boolean {
+                    return if (isReady) {
+                        content.viewTreeObserver.removeOnPreDrawListener(this)
+                        true
+                    } else {
+                        false
+                    }
+                }
+            }
+        )
+
+        handlePreDraw()
+
+        enableEdgeToEdge()
+
+        setContent {
+            AppTheme {
+                val slideDistance = rememberSlideDistance()
+                Navigator(
+                    screen = initialScreen,
+                    disposeBehavior = NavigatorDisposeBehavior(
+                        disposeNestedNavigators = false,
+                        disposeSteps = true,
+                    )
+                ) { navigator ->
+                    ScreenTransition(
+                        modifier = Modifier.fillMaxSize(),
+                        navigator = navigator,
+                        transition = {
+                            materialSharedAxisX(
+                                forward = navigator.lastEvent != StackEvent.Pop,
+                                slideDistance = slideDistance,
+                            )
+                        },
+                    )
+                    HandleNewIntent(this@MainActivity, navigator)
+                }
+            }
+        }
+    }
+
+    private fun handlePreDraw() {
+        // Handle pre draw here (e.g. Splash Screen, fetch data, etc.)
+        isReady = true
+    }
+
+    @Composable
+    private fun HandleNewIntent(context: Context, navigator: Navigator) {
+        LaunchedEffect(Unit) {
+            callbackFlow {
+                val componentActivity = context as ComponentActivity
+                val consumer = Consumer<Intent> { trySend(it) }
+                componentActivity.addOnNewIntentListener(consumer)
+                awaitClose { componentActivity.removeOnNewIntentListener(consumer) }
+            }.collectLatest { handleIntentAction(it, navigator) }
+        }
+    }
+
+    private fun handleIntentAction(intent: Intent, navigator: Navigator) {
+        // Handle intent here
+    }
+
+}
@@ -0,0 +1,15 @@
+package dev.achmad.ledgerr.ui.screens.home
+
+import androidx.compose.runtime.Composable
+import cafe.adriel.voyager.core.screen.Screen
+
+object HomeScreen: Screen {
+
+    @Suppress("unused")
+    private fun readResolve(): Any = HomeScreen
+
+    @Composable
+    override fun Content() {
+
+    }
+}
@@ -0,0 +1,69 @@
+package dev.achmad.ledgerr.ui.theme
+
+import androidx.activity.compose.LocalActivity
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalView
+import androidx.core.view.WindowCompat
+
+@Composable
+fun AppTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        darkTheme -> darkColorScheme()
+        else -> lightColorScheme()
+    }
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(colorScheme.background),
+    ) {
+        MaterialTheme(
+            colorScheme = colorScheme,
+            typography = Typography,
+            content = content,
+        )
+    }
+}
+
+@Suppress("DEPRECATION")
+@Composable
+fun NavigationBarColor(color: Color) {
+    val view = LocalView.current
+    val activity = LocalActivity.current
+    if (!view.isInEditMode) {
+        SideEffect {
+            activity?.window?.let {
+                it.navigationBarColor = color.toArgb()
+                WindowCompat.setDecorFitsSystemWindows(it, false)
+            }
+        }
+    }
+}
+
+@Suppress("DEPRECATION")
+@Composable
+fun StatusBarColor(color: Color) {
+    val view = LocalView.current
+    val activity = LocalActivity.current
+    if (!view.isInEditMode) {
+        SideEffect {
+            activity?.window?.let {
+                it.statusBarColor = color.toArgb()
+                WindowCompat.setDecorFitsSystemWindows(it, false)
+            }
+        }
+    }
+}
@@ -0,0 +1,34 @@
+package dev.achmad.ledgerr.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)
@@ -0,0 +1,12 @@
+# Add project specific R8 rules here.
+# AGP will combine all keep rule files in src/main/keepRules to pass to R8
+#
+# For more details, see
+#   https://d.android.com/r/tools/r8/keep-rules
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Ledgerr</string>
+</resources>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.Ledgerr" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older than API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>
@@ -0,0 +1,17 @@
+package dev.achmad.ledgerr
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}