convert EditTextPreference to json successfully

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Source.kt

@@ -58,7 +58,12 @@ object Source {
 
     private val context by DI.global.instance<CustomContext>()
 
-    fun getSourcePreferences(sourceId: Long) {
+    data class PreferenceObject(
+        val type: String,
+        val props: Any
+    )
+
+    fun getSourcePreferences(sourceId: Long): List<PreferenceObject> {
         val source = getHttpSource(sourceId)
 
         if (source is ConfigurableSource) {
@@ -66,7 +71,10 @@ object Source {
 
             source.setupPreferenceScreen(screen)
 
-            screen.preferences.forEach { println(it) }
+            return screen.preferences.map {
+                PreferenceObject(it::class.java.name, it)
+            }
         }
+        return emptyList()
     }
 }

server/src/main/kotlin/suwayomi/tachidesk/server/JavalinSetup.kt

@@ -1,5 +1,12 @@
 package suwayomi.tachidesk.server
 
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
 import io.javalin.Javalin
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -13,13 +20,6 @@ import java.io.IOException
 import java.util.concurrent.CompletableFuture
 import kotlin.concurrent.thread
 
-/*
- * Copyright (C) Contributors to the Suwayomi project
- * 
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-
 object JavalinSetup {
     private val logger = KotlinLogging.logger {}