Discord RPC

app/build.gradle

@@ -172,6 +172,7 @@ dependencies {
 	implementation libs.ssiv
 	implementation libs.disk.lru.cache
 	implementation libs.markwon
+	implementation libs.kizzyrpc
 
 	implementation libs.acra.http
 	implementation libs.acra.dialog

app/src/main/kotlin/org/koitharu/kotatsu/backups/ui/periodical/PeriodicalBackupSettingsFragment.kt

@@ -6,7 +6,6 @@ import android.os.Bundle
 import android.text.format.DateUtils
 import android.view.View
 import androidx.activity.result.ActivityResultCallback
-import androidx.core.content.ContextCompat
 import androidx.fragment.app.viewModels
 import androidx.preference.EditTextPreference
 import androidx.preference.Preference
@@ -86,9 +85,7 @@ class PeriodicalBackupSettingsFragment : BasePreferenceFragment(R.string.periodi
 			else -> path
 		}
 		preference.icon = if (path == null) {
-			ContextCompat.getDrawable(preference.context, R.drawable.ic_alert_outline)?.also {
-				it.setTint(ContextCompat.getColor(preference.context, R.color.warning))
-			}
+			getWarningIcon()
 		} else {
 			null
 		}

app/src/main/kotlin/org/koitharu/kotatsu/core/nav/AppRouter.kt

@@ -281,6 +281,10 @@ class AppRouter private constructor(
 		startActivity(sourcesSettingsIntent(contextOrNull() ?: return))
 	}
 
+	fun openDiscordSettings() {
+		startActivity(discordSettingsIntent(contextOrNull() ?: return))
+	}
+
 	fun openReaderTapGridSettings() = startActivity(ReaderTapGridConfigActivity::class.java)
 
 	fun openScrobblerSettings(scrobbler: ScrobblerService) {
@@ -745,6 +749,10 @@ class AppRouter private constructor(
 			Intent(context, SettingsActivity::class.java)
 				.setAction(ACTION_PERIODIC_BACKUP)
 
+		fun discordSettingsIntent(context: Context) =
+			Intent(context, SettingsActivity::class.java)
+				.setAction(ACTION_MANAGE_DISCORD)
+
 		fun proxySettingsIntent(context: Context) =
 			Intent(context, SettingsActivity::class.java)
 				.setAction(ACTION_PROXY)
@@ -827,6 +835,7 @@ class AppRouter private constructor(
 		const val ACTION_READER = "${BuildConfig.APPLICATION_ID}.action.MANAGE_READER_SETTINGS"
 		const val ACTION_SOURCE = "${BuildConfig.APPLICATION_ID}.action.MANAGE_SOURCE_SETTINGS"
 		const val ACTION_SOURCES = "${BuildConfig.APPLICATION_ID}.action.MANAGE_SOURCES"
+		const val ACTION_MANAGE_DISCORD = "${BuildConfig.APPLICATION_ID}.action.MANAGE_DISCORD"
 		const val ACTION_SUGGESTIONS = "${BuildConfig.APPLICATION_ID}.action.MANAGE_SUGGESTIONS"
 		const val ACTION_TRACKER = "${BuildConfig.APPLICATION_ID}.action.MANAGE_TRACKER"
 		const val ACTION_PERIODIC_BACKUP = "${BuildConfig.APPLICATION_ID}.action.MANAGE_PERIODIC_BACKUP"

app/src/main/kotlin/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -517,6 +517,12 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	val is32BitColorsEnabled: Boolean
 		get() = prefs.getBoolean(KEY_32BIT_COLOR, false)
 
+	val isDiscordRpcEnabled: Boolean
+		get() = prefs.getBoolean(KEY_DISCORD_RPC, false)
+
+	val discordToken: String?
+		get() = prefs.getString(KEY_DISCORD_TOKEN, null)?.trim()?.nullIfEmpty()
+
 	val isPeriodicalBackupEnabled: Boolean
 		get() = prefs.getBoolean(KEY_BACKUP_PERIODICAL_ENABLED, false)
 
@@ -782,6 +788,8 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		const val KEY_BACKUP_TG_CHAT = "backup_periodic_tg_chat_id"
 		const val KEY_MANGA_LIST_BADGES = "manga_list_badges"
 		const val KEY_TAGS_WARNINGS = "tags_warnings"
+		const val KEY_DISCORD_RPC = "discord_rpc"
+		const val KEY_DISCORD_TOKEN = "discord_token"
 
 		// keys for non-persistent preferences
 		const val KEY_APP_VERSION = "app_version"

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/BasePreferenceFragment.kt

@@ -1,9 +1,11 @@
 package org.koitharu.kotatsu.core.ui
 
 import android.content.Context
+import android.graphics.drawable.Drawable
 import android.os.Bundle
 import android.view.View
 import androidx.annotation.StringRes
+import androidx.core.content.ContextCompat
 import androidx.core.view.OnApplyWindowInsetsListener
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
@@ -86,6 +88,12 @@ abstract class BasePreferenceFragment(@StringRes private val titleId: Int) :
 		(activity as? SettingsActivity)?.setSectionTitle(title)
 	}
 
+	protected fun getWarningIcon(): Drawable? = context?.let { ctx ->
+		ContextCompat.getDrawable(ctx, R.drawable.ic_alert_outline)?.also {
+			it.setTint(ContextCompat.getColor(ctx, R.color.warning))
+		}
+	}
+
 	private fun focusPreference(key: String) {
 		val pref = findPreference<Preference>(key)
 		if (pref == null) {

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt

@@ -190,6 +190,11 @@ class ReaderActivity :
 		viewModel.onPause()
 	}
 
+	override fun onStop() {
+		super.onStop()
+		viewModel.onStop()
+	}
+
 	override fun onProvideAssistContent(outContent: AssistContent) {
 		super.onProvideAssistContent(outContent)
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
@@ -201,6 +206,7 @@ class ReaderActivity :
 
 	override fun onIdle() {
 		viewModel.saveCurrentState(readerManager.currentReader?.getCurrentState())
+		viewModel.onIdle()
 	}
 
 	override fun onVisibilityChanged(v: View, visibility: Int) {

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt

@@ -63,6 +63,7 @@ import org.koitharu.kotatsu.reader.domain.DetectReaderModeUseCase
 import org.koitharu.kotatsu.reader.domain.PageLoader
 import org.koitharu.kotatsu.reader.ui.config.ReaderSettings
 import org.koitharu.kotatsu.reader.ui.pager.ReaderUiState
+import org.koitharu.kotatsu.scrobbling.discord.DiscordRpc
 import org.koitharu.kotatsu.stats.domain.StatsCollector
 import java.time.Instant
 import javax.inject.Inject
@@ -84,6 +85,7 @@ class ReaderViewModel @Inject constructor(
 	private val historyUpdateUseCase: HistoryUpdateUseCase,
 	private val detectReaderModeUseCase: DetectReaderModeUseCase,
 	private val statsCollector: StatsCollector,
+	private val discordRpc: DiscordRpc,
 	@LocalStorageChanges localStorageChanges: SharedFlow<LocalManga?>,
 	interactor: DetailsInteractor,
 	deleteLocalMangaUseCase: DeleteLocalMangaUseCase,
@@ -210,6 +212,14 @@ class ReaderViewModel @Inject constructor(
 		}
 	}
 
+	fun onStop() {
+		discordRpc.clearRpc()
+	}
+
+	fun onIdle() {
+		discordRpc.setIdle()
+	}
+
 	fun switchMode(newMode: ReaderMode) {
 		launchJob {
 			val manga = checkNotNull(getMangaOrNull())
@@ -450,6 +460,7 @@ class ReaderViewModel @Inject constructor(
 		uiState.value = newState
 		if (isIncognitoMode.value == false) {
 			statsCollector.onStateChanged(m.id, state)
+			discordRpc.updateRpc(m.toManga(), newState)
 		}
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/scrobbling/discord/DiscordRpc.kt

@@ -0,0 +1,105 @@
+package org.koitharu.kotatsu.scrobbling.discord
+
+import android.content.Context
+import com.my.kizzyrpc.KizzyRPC
+import com.my.kizzyrpc.entities.presence.Activity
+import com.my.kizzyrpc.entities.presence.Assets
+import com.my.kizzyrpc.entities.presence.Metadata
+import com.my.kizzyrpc.entities.presence.Timestamps
+import dagger.hilt.android.ViewModelLifecycle
+import dagger.hilt.android.lifecycle.RetainedLifecycle
+import dagger.hilt.android.scopes.ViewModelScoped
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.plus
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.LocalizedAppContext
+import org.koitharu.kotatsu.core.model.appUrl
+import org.koitharu.kotatsu.core.model.getTitle
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.ext.lifecycleScope
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.reader.ui.pager.ReaderUiState
+import javax.inject.Inject
+
+private const val STATUS_ONLINE = "online"
+private const val STATUS_IDLE = "idle"
+
+@ViewModelScoped
+class DiscordRpc @Inject constructor(
+	@LocalizedAppContext private val context: Context,
+	private val settings: AppSettings,
+	lifecycle: ViewModelLifecycle,
+) : RetainedLifecycle.OnClearedListener {
+
+	private val coroutineScope = lifecycle.lifecycleScope + Dispatchers.Default
+	private val appId = context.getString(R.string.discord_app_id)
+	private val appName = context.getString(R.string.app_name)
+	private val rpc = if (settings.isDiscordRpcEnabled) {
+		settings.discordToken?.let { KizzyRPC(it) }
+	} else {
+		null
+	}
+
+	private var lastActivity: Activity? = null
+
+	init {
+		lifecycle.addOnClearedListener(this)
+	}
+
+	override fun onCleared() {
+		clearRpc()
+	}
+
+	fun clearRpc() {
+		rpc?.closeRPC()
+	}
+
+	fun setIdle() {
+		if (rpc != null) {
+			lastActivity?.let { activity ->
+				updateRpcAsync(activity, idle = true)
+			}
+		}
+	}
+
+	fun updateRpc(manga: Manga, state: ReaderUiState) {
+		if (rpc != null) {
+			updateRpcAsync(
+				activity = Activity(
+					applicationId = appId,
+					name = appName,
+					details = manga.title,
+					state = context.getString(R.string.chapter_d_of_d, state.chapterNumber, state.chaptersTotal),
+					type = 3,
+					timestamps = Timestamps(
+						start = System.currentTimeMillis(),
+					),
+					assets = Assets(
+						largeImage = "mp:attachments/1396092865544716390/1396123149921419465/Kotatsu.png?ex=687d9941&is=687c47c1&hm=61da2b66445adaea18ad16cc2c7f829d1c97f0622beec332f123a56f4d294820&=&format=webp&quality=lossless&width=256&height=256",
+						largeText = "Reading manga on Kotatsu - A manga reader app",
+						smallText = "Reading: ${manga.title}",
+						smallImage = "mp:attachments/1282576939831529473/1395712714415800392/button.png?ex=687b7242&is=687a20c2&hm=828ad97537c94128504402b43512523fe30801d534a48258f80c6fd29fda67c2&=&format=webp&quality=lossless",
+					),
+					buttons = listOf(
+						context.getString(R.string.link_to_manga_in_app),
+						context.getString(R.string.link_to_manga_on_s, manga.source.getTitle(context)),
+					),
+					metadata = Metadata(listOf(manga.appUrl.toString(), manga.publicUrl)),
+				),
+				idle = false,
+			)
+		}
+	}
+
+	private fun updateRpcAsync(activity: Activity, idle: Boolean) {
+		val rpc = rpc ?: return
+		lastActivity = activity
+		coroutineScope.launch {
+			rpc.updateRPC(
+				activity = activity,
+				status = if (idle) STATUS_IDLE else STATUS_ONLINE,
+			)
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/DiscordSettingsFragment.kt

@@ -0,0 +1,44 @@
+package org.koitharu.kotatsu.settings
+
+import android.os.Bundle
+import android.view.View
+import androidx.preference.EditTextPreference
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.ui.BasePreferenceFragment
+import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.settings.utils.EditTextFallbackSummaryProvider
+
+class DiscordSettingsFragment : BasePreferenceFragment(R.string.discord) {
+
+	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+		addPreferencesFromResource(R.xml.pref_discord)
+		findPreference<EditTextPreference>(AppSettings.KEY_DISCORD_TOKEN)?.let { pref ->
+			pref.summaryProvider = EditTextFallbackSummaryProvider(R.string.discord_token_summary)
+			pref.setDialogMessage(R.string.discord_token_summary)
+			pref.setOnBindEditTextListener {
+				it.setHint(R.string.discord_token_hint)
+			}
+		}
+	}
+
+	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+		super.onViewCreated(view, savedInstanceState)
+		settings.observe(
+			AppSettings.KEY_DISCORD_RPC,
+			AppSettings.KEY_DISCORD_TOKEN,
+		).observe(viewLifecycleOwner) {
+			bindTokenWarning()
+		}
+	}
+
+	private fun bindTokenWarning() {
+		val pref = findPreference<EditTextPreference>(AppSettings.KEY_DISCORD_TOKEN) ?: return
+		val shouldShowError = settings.isDiscordRpcEnabled && settings.discordToken == null
+		pref.icon = if (shouldShowError) {
+			getWarningIcon()
+		} else {
+			null
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/SettingsActivity.kt

@@ -149,6 +149,7 @@ class SettingsActivity :
 			AppRouter.ACTION_TRACKER -> TrackerSettingsFragment()
 			AppRouter.ACTION_PERIODIC_BACKUP -> PeriodicalBackupSettingsFragment()
 			AppRouter.ACTION_SOURCES -> SourcesSettingsFragment()
+			AppRouter.ACTION_MANAGE_DISCORD -> DiscordSettingsFragment()
 			AppRouter.ACTION_PROXY -> ProxySettingsFragment()
 			AppRouter.ACTION_MANAGE_DOWNLOADS -> DownloadsSettingsFragment()
 			AppRouter.ACTION_SOURCE -> SourceSettingsFragment.newInstance(

app/src/main/res/drawable/ic_discord.xml

@@ -0,0 +1,11 @@
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:tint="?attr/colorControlNormal"
+	android:viewportWidth="24"
+	android:viewportHeight="24">
+	<path
+		android:fillColor="@android:color/white"
+		android:pathData="M19.27,5.33C17.94,4.71 16.5,4.26 15,4c-0.03,0 -0.05,0.01 -0.07,0.03c-0.18,0.33 -0.39,0.76 -0.53,1.09c-1.61,-0.24 -3.22,-0.24 -4.8,0C9.46,4.78 9.25,4.36 9.06,4.03C9.05,4.01 9.02,4 8.99,4c-1.5,0.26 -2.93,0.71 -4.27,1.33c-0.01,0 -0.02,0.01 -0.03,0.02c-2.72,4.07 -3.47,8.03 -3.1,11.95c0,0.02 0.01,0.04 0.03,0.05c1.8,1.32 3.53,2.12 5.24,2.65c0.03,0.01 0.06,0 0.07,-0.02c0.4,-0.55 0.76,-1.13 1.07,-1.74c0.02,-0.04 0,-0.08 -0.04,-0.09c-0.57,-0.22 -1.11,-0.48 -1.64,-0.78c-0.04,-0.02 -0.04,-0.08 -0.01,-0.11c0.11,-0.08 0.22,-0.17 0.33,-0.25c0.02,-0.02 0.05,-0.02 0.07,-0.01c3.44,1.57 7.15,1.57 10.55,0c0.02,-0.01 0.05,-0.01 0.07,0.01c0.11,0.09 0.22,0.17 0.33,0.26c0.04,0.03 0.04,0.09 -0.01,0.11c-0.52,0.31 -1.07,0.56 -1.64,0.78c-0.04,0.01 -0.05,0.06 -0.04,0.09c0.32,0.61 0.68,1.19 1.07,1.74C17.07,20 17.1,20.01 17.13,20c1.72,-0.53 3.45,-1.33 5.25,-2.65c0.02,-0.01 0.03,-0.03 0.03,-0.05c0.44,-4.53 -0.73,-8.46 -3.1,-11.95C19.3,5.34 19.29,5.33 19.27,5.33zM8.52,14.91c-1.03,0 -1.89,-0.95 -1.89,-2.12s0.84,-2.12 1.89,-2.12c1.06,0 1.9,0.96 1.89,2.12C10.41,13.96 9.57,14.91 8.52,14.91zM15.49,14.91c-1.03,0 -1.89,-0.95 -1.89,-2.12s0.84,-2.12 1.89,-2.12c1.06,0 1.9,0.96 1.89,2.12C17.38,13.96 16.55,14.91 15.49,14.91z" />
+</vector>

app/src/main/res/values/constants.xml

@@ -21,6 +21,7 @@
 	<string name="sync_authority_favourites" translatable="false">org.koitharu.kotatsu.favourites</string>
 	<string name="tg_backup_bot_token" translatable="false">7455491254:AAHq5AJmizJJpVqFgx16pEAO4g0AX8V6NTY</string>
 	<string name="tg_backup_bot_name" translatable="false">kotatsu_backup_bot</string>
+	<string name="discord_app_id" translatable="false">1395464028611940393</string>
 	<string-array name="values_theme" translatable="false">
 		<item>-1</item>
 		<item>1</item>

app/src/main/res/values/strings.xml

@@ -860,4 +860,10 @@
 	<string name="main_screen_fab">Show floating Continue button</string>
 	<string name="main_screen_fab_summary">Allows to continue reading in a one click. This button will not appear in incognito mode or when the history is empty</string>
 	<string name="error_corrupted_zip">Corrupted ZIP archive (%s)</string>
+	<string name="discord" translatable="false">Discord</string>
+	<string name="discord_rpc">Discord Rich Presence</string>
+	<string name="discord_token">Discord Token</string>
+	<string name="discord_token_summary">Enter your Discord Token to enable Rich Presence</string>
+	<string name="discord_token_hint">Paste your Discord Token here</string>
+	<string name="discord_rpc_summary">Show your reading status on Discord</string>
 </resources>

app/src/main/res/xml/pref_discord.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.preference.PreferenceScreen
+	xmlns:android="http://schemas.android.com/apk/res/android">
+
+	<SwitchPreferenceCompat
+		android:defaultValue="false"
+		android:key="discord_rpc"
+		android:layout="@layout/preference_toggle_header"
+		android:title="@string/discord_rpc" />
+
+	<EditTextPreference
+		android:dependency="discord_rpc"
+		android:key="discord_token"
+		android:summary="@string/discord_token_summary"
+		android:title="@string/discord_token" />
+
+</androidx.preference.PreferenceScreen>

app/src/main/res/xml/pref_services.xml

@@ -45,24 +45,36 @@
 
 		<Preference
 			android:key="anilist"
+			android:summary="@string/loading_"
 			android:title="@string/anilist"
 			app:icon="@drawable/ic_anilist" />
 
 		<Preference
 			android:key="kitsu"
+			android:summary="@string/loading_"
 			android:title="@string/kitsu"
 			app:icon="@drawable/ic_kitsu" />
 
 		<Preference
 			android:key="mal"
+			android:summary="@string/loading_"
 			android:title="@string/mal"
 			app:icon="@drawable/ic_mal" />
 
 		<Preference
 			android:key="shikimori"
+			android:summary="@string/loading_"
 			android:title="@string/shikimori"
 			app:icon="@drawable/ic_shikimori" />
 
 	</PreferenceCategory>
 
+	<Preference
+		android:fragment="org.koitharu.kotatsu.settings.DiscordSettingsFragment"
+		android:key="discord_rpc"
+		android:summary="@string/discord_rpc_summary"
+		android:title="@string/discord_rpc"
+		app:allowDividerAbove="true"
+		app:icon="@drawable/ic_discord" />
+
 </PreferenceScreen>

gradle/libs.versions.toml

@@ -25,6 +25,7 @@ json = "20250517"
 junit = "4.13.2"
 junitKtx = "1.2.1"
 kotlin = "2.1.21"
+kizzyRpc = "ad8f2e32eb"
 ksp = "2.1.21-2.0.1"
 leakcanary = "3.0-alpha-8"
 lifecycle = "2.9.1"
@@ -94,6 +95,7 @@ hilt-android-testing = { module = "com.google.dagger:hilt-android-testing", vers
 hilt-compiler = { module = "com.google.dagger:hilt-compiler", version.ref = "dagger" }
 json = { module = "org.json:json", version.ref = "json" }
 junit = { module = "junit:junit", version.ref = "junit" }
+kizzyrpc = { module = "com.github.dead8309:KizzyRPC", version.ref = "kizzyRpc" }
 kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "kotlin" }
 kotlinx-coroutines-android = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-android", version.ref = "coroutines" }
 kotlinx-coroutines-guava = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-guava", version.ref = "coroutines" }