convert EditTextPreference to json successfully

AndroidCompat/src/main/java/androidx/preference/Preference.java

@@ -8,18 +8,22 @@ package androidx.preference;
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 import android.content.Context;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 
 /** A minimal implementation of androidx.preference.Preference */
 public class Preference {
     // reference: https://android.googlesource.com/platform/frameworks/support/+/996971f962fcd554339a7cb2859cef9ca89dbcb7/preference/preference/src/main/java/androidx/preference/Preference.java
     // Note: `Preference` doesn't actually hold or persist the value, `OnPreferenceChangeListener` is called and it's up to the extension to persist it.
 
+    @JsonIgnore
     protected Context context;
 
     private String key;
     private CharSequence title;
     private Object defaultValue;
-    private OnPreferenceChangeListener onChangeListener;
+
+    @JsonIgnore
+    public OnPreferenceChangeListener onChangeListener;
 
     public Preference(Context context) {
         this.context = context;
@@ -29,7 +33,6 @@ public class Preference {
         return context;
     }
 
-
     public String getKey() {
         return key;
     }
@@ -54,6 +57,10 @@ public class Preference {
         return onChangeListener == null || onChangeListener.onPreferenceChange(this, newValue);
     }
 
+    public Object getDefaultValue() {
+        return defaultValue;
+    }
+
     public interface OnPreferenceChangeListener {
         boolean onPreferenceChange(Preference preference, Object newValue);
     }

build.gradle.kts

@@ -84,5 +84,8 @@ configure(projects) {
 
         // APK parser
         implementation("net.dongliu:apk-parser:2.6.10")
+
+        // Jackson
+        implementation("com.fasterxml.jackson.core:jackson-annotations:2.10.3")
     }
 }

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 {}