Database migration for downgrade from 24 to 23 (#1269, #1270)

(cherry picked from commit 5e8aa4cec7)

app/build.gradle

@@ -18,8 +18,8 @@ android {
 		applicationId 'org.koitharu.kotatsu'
 		minSdk = 21
 		targetSdk = 35
-		versionCode = 694
+		versionCode = 702
-		versionName = '7.7.2'
+		versionName = '7.7.10'
 		generatedDensities = []
 		testInstrumentationRunner 'org.koitharu.kotatsu.HiltTestRunner'
 		ksp {

app/src/main/AndroidManifest.xml

@@ -46,7 +46,7 @@
 		android:allowBackup="true"
 		android:backupAgent="org.koitharu.kotatsu.settings.backup.AppBackupAgent"
 		android:dataExtractionRules="@xml/backup_rules"
-		android:enableOnBackInvokedCallback="true"
+		android:enableOnBackInvokedCallback="@bool/is_predictive_back_enabled"
 		android:fullBackupContent="@xml/backup_content"
 		android:fullBackupOnly="true"
 		android:icon="@mipmap/ic_launcher"
@@ -209,6 +209,7 @@
 		<activity android:name="org.koitharu.kotatsu.favourites.ui.categories.edit.FavouritesCategoryEditActivity" />
 		<activity
 			android:name="org.koitharu.kotatsu.sync.ui.SyncAuthActivity"
+			android:exported="true"
 			android:label="@string/sync" />
 		<activity
 			android:name="org.koitharu.kotatsu.reader.ui.colorfilter.ColorFilterConfigActivity"
@@ -279,6 +280,10 @@
 		<service
 			android:name="org.koitharu.kotatsu.local.ui.LocalIndexUpdateService"
 			android:label="@string/local_manga_processing" />
+		<service
+			android:name="org.koitharu.kotatsu.local.ui.ImportService"
+			android:foregroundServiceType="dataSync"
+			android:label="@string/importing_manga" />
 		<service
 			android:name="org.koitharu.kotatsu.widget.shelf.ShelfWidgetService"
 			android:label="@string/manga_shelf"

app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/AlternativesUseCase.kt

@@ -8,13 +8,13 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Semaphore
 import kotlinx.coroutines.sync.withPermit
 import org.koitharu.kotatsu.core.parser.MangaRepository
-import org.koitharu.kotatsu.core.util.ext.almostEquals
 import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.almostEquals
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import javax.inject.Inject
 

app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksAdapter.kt

@@ -10,6 +10,7 @@ import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
 import org.koitharu.kotatsu.list.ui.adapter.ListHeaderClickListener
 import org.koitharu.kotatsu.list.ui.adapter.ListItemType
 import org.koitharu.kotatsu.list.ui.adapter.emptyStateListAD
+import org.koitharu.kotatsu.list.ui.adapter.errorStateListAD
 import org.koitharu.kotatsu.list.ui.adapter.listHeaderAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
 import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
@@ -25,6 +26,7 @@ class BookmarksAdapter(
 	init {
 		addDelegate(ListItemType.PAGE_THUMB, bookmarkLargeAD(coil, lifecycleOwner, clickListener))
 		addDelegate(ListItemType.HEADER, listHeaderAD(headerClickListener))
+		addDelegate(ListItemType.STATE_ERROR, errorStateListAD(null))
 		addDelegate(ListItemType.FOOTER_LOADING, loadingFooterAD())
 		addDelegate(ListItemType.STATE_LOADING, loadingStateAD())
 		addDelegate(ListItemType.STATE_EMPTY, emptyStateListAD(coil, lifecycleOwner, null))

app/src/main/kotlin/org/koitharu/kotatsu/core/db/MangaDatabase.kt

@@ -36,6 +36,7 @@ import org.koitharu.kotatsu.core.db.migrations.Migration1To2
 import org.koitharu.kotatsu.core.db.migrations.Migration20To21
 import org.koitharu.kotatsu.core.db.migrations.Migration21To22
 import org.koitharu.kotatsu.core.db.migrations.Migration22To23
+import org.koitharu.kotatsu.core.db.migrations.Migration24To23
 import org.koitharu.kotatsu.core.db.migrations.Migration2To3
 import org.koitharu.kotatsu.core.db.migrations.Migration3To4
 import org.koitharu.kotatsu.core.db.migrations.Migration4To5
@@ -128,6 +129,7 @@ fun getDatabaseMigrations(context: Context): Array<Migration> = arrayOf(
 	Migration20To21(),
 	Migration21To22(),
 	Migration22To23(),
+	Migration24To23(),
 )
 
 fun MangaDatabase(context: Context): MangaDatabase = Room

app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt

@@ -1,11 +1,11 @@
 package org.koitharu.kotatsu.core.db.entity
 
 import org.koitharu.kotatsu.core.model.MangaSource
-import org.koitharu.kotatsu.core.util.ext.longHashCode
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.longHashCode
 import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.toTitleCase
 
@@ -49,7 +49,7 @@ fun Manga.toEntity() = MangaEntity(
 	publicUrl = publicUrl,
 	source = source.name,
 	largeCoverUrl = largeCoverUrl,
-	coverUrl = coverUrl,
+	coverUrl = coverUrl.orEmpty(),
 	altTitle = altTitle,
 	rating = rating,
 	isNsfw = isNsfw,

app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt

@@ -14,7 +14,7 @@ data class MangaEntity(
 	@ColumnInfo(name = "url") val url: String,
 	@ColumnInfo(name = "public_url") val publicUrl: String,
 	@ColumnInfo(name = "rating") val rating: Float, // normalized value [0..1] or -1
-	@ColumnInfo(name = "nsfw") val isNsfw: Boolean,
+	@ColumnInfo(name = "nsfw") val isNsfw: Boolean, // TODO change to contentRating
 	@ColumnInfo(name = "cover_url") val coverUrl: String,
 	@ColumnInfo(name = "large_cover_url") val largeCoverUrl: String?,
 	@ColumnInfo(name = "state") val state: String?,

app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration24To23.kt

@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration24To23 : Migration(24, 23) {
+
+	override fun migrate(db: SupportSQLiteDatabase) {
+		db.execSQL("DROP TABLE IF EXISTS `chapters`")
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CaughtException.kt

@@ -1,3 +1,5 @@
 package org.koitharu.kotatsu.core.exceptions
 
-class CaughtException(cause: Throwable) : RuntimeException("${cause.javaClass.simpleName}(${cause.message})", cause)
+class CaughtException(
+	override val cause: Throwable
+) : RuntimeException("${cause.javaClass.simpleName}(${cause.message})", cause)

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/NoDataReceivedException.kt

@@ -3,5 +3,5 @@ package org.koitharu.kotatsu.core.exceptions
 import okio.IOException
 
 class NoDataReceivedException(
-	url: String,
+	val url: String,
 ) : IOException("No data has been received from $url")

app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/WrapperIOException.kt

@@ -0,0 +1,5 @@
+package org.koitharu.kotatsu.core.exceptions
+
+import okio.IOException
+
+class WrapperIOException(override val cause: Exception) : IOException(cause)

app/src/main/kotlin/org/koitharu/kotatsu/core/github/VersionId.kt

@@ -1,6 +1,6 @@
 package org.koitharu.kotatsu.core.github
 
-import org.koitharu.kotatsu.core.util.ext.digits
+import org.koitharu.kotatsu.parsers.util.digits
 import java.util.Locale
 
 data class VersionId(

app/src/main/kotlin/org/koitharu/kotatsu/core/image/BitmapDecoderCompat.kt

@@ -5,6 +5,7 @@ import android.graphics.BitmapFactory
 import android.graphics.ImageDecoder
 import android.os.Build
 import android.webkit.MimeTypeMap
+import androidx.annotation.RequiresApi
 import com.davemorrissey.labs.subscaleview.decoder.ImageDecodeException
 import okhttp3.MediaType
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
@@ -32,19 +33,21 @@ object BitmapDecoderCompat {
 	}
 
 	@Blocking
-	fun decode(stream: InputStream, type: MediaType?): Bitmap {
+	fun decode(stream: InputStream, type: MediaType?, isMutable: Boolean = false): Bitmap {
 		val format = type?.subtype
 		if (format == FORMAT_AVIF) {
 			return decodeAvif(stream.toByteBuffer())
 		}
 		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
-			return checkBitmapNotNull(BitmapFactory.decodeStream(stream), format)
+			val opts = BitmapFactory.Options()
+			opts.inMutable = isMutable
+			return checkBitmapNotNull(BitmapFactory.decodeStream(stream, null, opts), format)
 		}
 		val byteBuffer = stream.toByteBuffer()
 		return if (AvifDecoder.isAvifImage(byteBuffer)) {
 			decodeAvif(byteBuffer)
 		} else {
-			ImageDecoder.decodeBitmap(ImageDecoder.createSource(byteBuffer))
+			ImageDecoder.decodeBitmap(ImageDecoder.createSource(byteBuffer), DecoderConfigListener(isMutable))
 		}
 	}
 
@@ -74,4 +77,18 @@ object BitmapDecoderCompat {
 		}
 		return bitmap
 	}
+
+	@RequiresApi(Build.VERSION_CODES.P)
+	private class DecoderConfigListener(
+		private val isMutable: Boolean,
+	) : ImageDecoder.OnHeaderDecodedListener {
+
+		override fun onHeaderDecoded(
+			decoder: ImageDecoder,
+			info: ImageDecoder.ImageInfo,
+			source: ImageDecoder.Source
+		) {
+			decoder.isMutableRequired = isMutable
+		}
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableManga.kt

@@ -2,7 +2,6 @@ package org.koitharu.kotatsu.core.model.parcelable
 
 import android.os.Parcel
 import android.os.Parcelable
-import androidx.core.os.ParcelCompat
 import kotlinx.parcelize.Parceler
 import kotlinx.parcelize.Parcelize
 import org.koitharu.kotatsu.core.model.MangaSource
@@ -13,6 +12,7 @@ import org.koitharu.kotatsu.parsers.model.Manga
 @Parcelize
 data class ParcelableManga(
 	val manga: Manga,
+	private val withDescription: Boolean = true,
 ) : Parcelable {
 
 	companion object : Parceler<ParcelableManga> {
@@ -24,10 +24,10 @@ data class ParcelableManga(
 			parcel.writeString(url)
 			parcel.writeString(publicUrl)
 			parcel.writeFloat(rating)
-			ParcelCompat.writeBoolean(parcel, isNsfw)
+			parcel.writeSerializable(contentRating)
 			parcel.writeString(coverUrl)
 			parcel.writeString(largeCoverUrl)
-			parcel.writeString(description)
+			parcel.writeString(description.takeIf { withDescription })
 			parcel.writeParcelable(ParcelableMangaTags(tags), flags)
 			parcel.writeSerializable(state)
 			parcel.writeString(author)
@@ -42,8 +42,8 @@ data class ParcelableManga(
 				url = requireNotNull(parcel.readString()),
 				publicUrl = requireNotNull(parcel.readString()),
 				rating = parcel.readFloat(),
-				isNsfw = ParcelCompat.readBoolean(parcel),
+				contentRating = parcel.readSerializableCompat(),
-				coverUrl = requireNotNull(parcel.readString()),
+				coverUrl = parcel.readString(),
 				largeCoverUrl = parcel.readString(),
 				description = parcel.readString(),
 				tags = requireNotNull(parcel.readParcelableCompat<ParcelableMangaTags>()).tags,
@@ -52,6 +52,7 @@ data class ParcelableManga(
 				chapters = null,
 				source = MangaSource(parcel.readString()),
 			),
+			withDescription = true,
 		)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/network/AppProxySelector.kt

@@ -35,7 +35,7 @@ class AppProxySelector(
 		if (type == Proxy.Type.DIRECT) {
 			return Proxy.NO_PROXY
 		}
-		if (address.isNullOrEmpty() || port == 0) {
+		if (address.isNullOrEmpty() || port < 0 || port > 0xFFFF) {
 			throw ProxyConfigException()
 		}
 		cachedProxy?.let {

app/src/main/kotlin/org/koitharu/kotatsu/core/network/GZipInterceptor.kt

@@ -1,19 +1,26 @@
 package org.koitharu.kotatsu.core.network
 
 import okhttp3.Interceptor
+import okhttp3.MultipartBody
 import okhttp3.Response
 import okio.IOException
+import org.koitharu.kotatsu.core.exceptions.WrapperIOException
 import org.koitharu.kotatsu.core.network.CommonHeaders.CONTENT_ENCODING
 
 class GZipInterceptor : Interceptor {
 
-	override fun intercept(chain: Interceptor.Chain): Response {
+	override fun intercept(chain: Interceptor.Chain): Response = try {
-		val newRequest = chain.request().newBuilder()
+		val request = chain.request()
-		newRequest.addHeader(CONTENT_ENCODING, "gzip")
+		if (request.body is MultipartBody) {
-		return try {
+			chain.proceed(request)
+		} else {
+			val newRequest = request.newBuilder()
+			newRequest.addHeader(CONTENT_ENCODING, "gzip")
 			chain.proceed(newRequest.build())
-		} catch (e: NullPointerException) {
-			throw IOException(e)
 		}
+	} catch (e: IOException) {
+		throw e
+	} catch (e: Exception) {
+		throw WrapperIOException(e)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/network/cookies/AndroidCookieJar.kt

@@ -5,7 +5,7 @@ import androidx.annotation.WorkerThread
 import androidx.core.util.Predicate
 import okhttp3.Cookie
 import okhttp3.HttpUrl
-import org.koitharu.kotatsu.core.util.ext.newBuilder
+import org.koitharu.kotatsu.parsers.util.newBuilder
 import kotlin.coroutines.resume
 import kotlin.coroutines.suspendCoroutine
 

app/src/main/kotlin/org/koitharu/kotatsu/core/network/imageproxy/BaseImageProxyInterceptor.kt

@@ -17,8 +17,8 @@ import org.jsoup.HttpStatusException
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.core.exceptions.CloudFlareBlockedException
 import org.koitharu.kotatsu.core.util.ext.ensureSuccess
-import org.koitharu.kotatsu.core.util.ext.isHttpOrHttps
 import org.koitharu.kotatsu.parsers.util.await
+import org.koitharu.kotatsu.parsers.util.isHttpOrHttps
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import java.net.HttpURLConnection
 import java.util.Collections

app/src/main/kotlin/org/koitharu/kotatsu/core/parser/MangaLinkResolver.kt

@@ -6,13 +6,13 @@ import dagger.Reusable
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.core.model.UnknownMangaSource
 import org.koitharu.kotatsu.core.model.isNsfw
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.exception.NotFoundException
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.almostEquals
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.parsers.util.levenshteinDistance
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import javax.inject.Inject

app/src/main/kotlin/org/koitharu/kotatsu/core/parser/MangaLoaderContextImpl.kt

@@ -2,12 +2,10 @@ package org.koitharu.kotatsu.core.parser
 
 import android.annotation.SuppressLint
 import android.content.Context
-import android.graphics.BitmapFactory
 import android.util.Base64
 import android.webkit.WebView
 import androidx.annotation.MainThread
 import androidx.core.os.LocaleListCompat
-import com.davemorrissey.labs.subscaleview.decoder.ImageDecodeException
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
@@ -17,6 +15,7 @@ import okhttp3.OkHttpClient
 import okhttp3.Response
 import okhttp3.ResponseBody.Companion.asResponseBody
 import okio.Buffer
+import org.koitharu.kotatsu.core.image.BitmapDecoderCompat
 import org.koitharu.kotatsu.core.network.MangaHttpClient
 import org.koitharu.kotatsu.core.network.cookies.MutableCookieJar
 import org.koitharu.kotatsu.core.prefs.SourceSettings
@@ -31,7 +30,6 @@ import org.koitharu.kotatsu.parsers.config.MangaSourceConfig
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.network.UserAgents
 import org.koitharu.kotatsu.parsers.util.map
-import org.koitharu.kotatsu.parsers.util.mimeType
 import java.lang.ref.WeakReference
 import java.util.Locale
 import javax.inject.Inject
@@ -80,15 +78,13 @@ class MangaLoaderContextImpl @Inject constructor(
 
 	override fun redrawImageResponse(response: Response, redraw: (image: Bitmap) -> Bitmap): Response {
 		return response.map { body ->
-			val opts = BitmapFactory.Options()
+			BitmapDecoderCompat.decode(body.byteStream(), body.contentType(), isMutable = true).use { bitmap ->
-			opts.inMutable = true
-			BitmapFactory.decodeStream(body.byteStream(), null, opts)?.use { bitmap ->
 				(redraw(BitmapWrapper.create(bitmap)) as BitmapWrapper).use { result ->
 					Buffer().also {
 						result.compressTo(it.outputStream())
 					}.asResponseBody("image/jpeg".toMediaType())
 				}
-			} ?: throw ImageDecodeException(response.request.url.toString(), response.mimeType)
+			}
 		}
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/core/parser/external/ExternalPluginContentSource.kt

@@ -7,8 +7,6 @@ import androidx.collection.ArraySet
 import androidx.core.net.toUri
 import org.jetbrains.annotations.Blocking
 import org.koitharu.kotatsu.core.exceptions.IncompatiblePluginException
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
-import org.koitharu.kotatsu.parsers.exception.NotFoundException
 import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.ContentType
 import org.koitharu.kotatsu.parsers.model.Demographic
@@ -22,6 +20,7 @@ import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
 import org.koitharu.kotatsu.parsers.util.find
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
 import org.koitharu.kotatsu.parsers.util.splitTwoParts
 import java.util.EnumSet
@@ -82,7 +81,7 @@ class ExternalPluginContentSource(
 			publicUrl = details.publicUrl.ifEmpty { manga.publicUrl },
 			rating = maxOf(details.rating, manga.rating),
 			isNsfw = details.isNsfw,
-			coverUrl = details.coverUrl.ifEmpty { manga.coverUrl },
+			coverUrl = details.coverUrl.ifNullOrEmpty { manga.coverUrl },
 			tags = details.tags + manga.tags,
 			state = details.state ?: manga.state,
 			author = details.author.ifNullOrEmpty { manga.author },

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

@@ -30,6 +30,7 @@ import org.koitharu.kotatsu.parsers.model.SortOrder
 import org.koitharu.kotatsu.parsers.util.find
 import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
 import org.koitharu.kotatsu.parsers.util.mapToSet
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.reader.domain.ReaderColorFilter
 import java.io.File
 import java.net.Proxy
@@ -412,10 +413,10 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getString(KEY_PROXY_PORT, null)?.toIntOrNull() ?: 0
 
 	val proxyLogin: String?
-		get() = prefs.getString(KEY_PROXY_LOGIN, null)?.takeUnless { it.isEmpty() }
+		get() = prefs.getString(KEY_PROXY_LOGIN, null)?.nullIfEmpty()
 
 	val proxyPassword: String?
-		get() = prefs.getString(KEY_PROXY_PASSWORD, null)?.takeUnless { it.isEmpty() }
+		get() = prefs.getString(KEY_PROXY_PASSWORD, null)?.nullIfEmpty()
 
 	var localListOrder: SortOrder
 		get() = prefs.getEnumValue(KEY_LOCAL_LIST_ORDER, SortOrder.NEWEST)

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

@@ -4,13 +4,14 @@ import android.content.Context
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener
 import androidx.core.content.edit
 import org.koitharu.kotatsu.core.util.ext.getEnumValue
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.putEnumValue
 import org.koitharu.kotatsu.core.util.ext.sanitizeHeaderValue
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.config.MangaSourceConfig
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.settings.utils.validation.DomainValidator
 
 class SourceSettings(context: Context, source: MangaSource) : MangaSourceConfig {
@@ -38,7 +39,7 @@ class SourceSettings(context: Context, source: MangaSource) : MangaSourceConfig
 
 			is ConfigKey.ShowSuspiciousContent -> prefs.getBoolean(key.key, key.defaultValue)
 			is ConfigKey.SplitByTranslations -> prefs.getBoolean(key.key, key.defaultValue)
-			is ConfigKey.PreferredImageServer -> prefs.getString(key.key, key.defaultValue)?.takeUnless(String::isEmpty)
+			is ConfigKey.PreferredImageServer -> prefs.getString(key.key, key.defaultValue)?.nullIfEmpty()
 		} as T
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/Collections.kt

@@ -4,21 +4,8 @@ import androidx.collection.ArrayMap
 import androidx.collection.ArraySet
 import androidx.collection.LongSet
 import org.koitharu.kotatsu.BuildConfig
-import java.util.Collections
 import java.util.EnumSet
 
-inline fun <T> MutableSet(size: Int, init: (index: Int) -> T): MutableSet<T> {
-	val set = ArraySet<T>(size)
-	repeat(size) { index -> set.add(init(index)) }
-	return set
-}
-
-inline fun <T> Set(size: Int, init: (index: Int) -> T): Set<T> = when (size) {
-	0 -> emptySet()
-	1 -> Collections.singleton(init(0))
-	else -> MutableSet(size, init)
-}
-
 fun <T> Collection<T>.asArrayList(): ArrayList<T> = if (this is ArrayList<*>) {
 	this as ArrayList<T>
 } else {
@@ -76,15 +63,6 @@ fun <T> Iterable<T>.sortedWithSafe(comparator: Comparator<in T>): List<T> = try
 	}
 }
 
-fun Collection<*>?.sizeOrZero() = this?.size ?: 0
-
-@Suppress("UNCHECKED_CAST")
-inline fun <T, reified R> Collection<T>.mapToArray(transform: (T) -> R): Array<R> {
-	val result = arrayOfNulls<R>(size)
-	forEachIndexed { index, t -> result[index] = transform(t) }
-	return result as Array<R>
-}
-
 fun LongSet.toLongArray(): LongArray {
 	val result = LongArray(size)
 	var i = 0

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/ContentResolver.kt

@@ -6,6 +6,7 @@ import android.net.Uri
 import android.os.Build
 import android.os.storage.StorageManager
 import android.provider.DocumentsContract
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.parsers.util.removeSuffix
 import java.io.File
 import java.lang.reflect.Array as ArrayReflect
@@ -80,7 +81,7 @@ private fun getVolumePathForAndroid11AndAbove(volumeId: String, context: Context
 private fun getVolumeIdFromTreeUri(treeUri: Uri): String? {
 	val docId = DocumentsContract.getTreeDocumentId(treeUri)
 	val split = docId.split(":".toRegex())
-	return split.firstOrNull()?.takeUnless { it.isEmpty() }
+	return split.firstOrNull()?.nullIfEmpty()
 }
 
 private fun getDocumentPathFromTreeUri(treeUri: Uri): String? {

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/Http.kt

@@ -1,7 +1,5 @@
 package org.koitharu.kotatsu.core.util.ext
 
-import okhttp3.Cookie
-import okhttp3.HttpUrl
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.RequestBody.Companion.toRequestBody
 import okhttp3.Response
@@ -27,12 +25,6 @@ fun Response.parseJsonOrNull(): JSONObject? {
 	}
 }
 
-val HttpUrl.isHttpOrHttps: Boolean
-	get() {
-		val s = scheme.lowercase()
-		return s == "https" || s == "http"
-	}
-
 fun Response.ensureSuccess() = apply {
 	if (!isSuccessful || code == HttpURLConnection.HTTP_NO_CONTENT) {
 		closeQuietly()
@@ -40,26 +32,6 @@ fun Response.ensureSuccess() = apply {
 	}
 }
 
-fun Cookie.newBuilder(): Cookie.Builder = Cookie.Builder().also { c ->
-	c.name(name)
-	c.value(value)
-	if (persistent) {
-		c.expiresAt(expiresAt)
-	}
-	if (hostOnly) {
-		c.hostOnlyDomain(domain)
-	} else {
-		c.domain(domain)
-	}
-	c.path(path)
-	if (secure) {
-		c.secure()
-	}
-	if (httpOnly) {
-		c.httpOnly()
-	}
-}
-
 fun String.sanitizeHeaderValue(): String {
 	return if (all(Char::isValidForHeaderValue)) {
 		this // fast path

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/LocaleList.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.core.util.ext
 import android.content.Context
 import androidx.core.os.LocaleListCompat
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.parsers.util.Set
 import org.koitharu.kotatsu.parsers.util.toTitleCase
 import java.util.Locale
 

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/Primitive.kt

@@ -1,7 +1,2 @@
 package org.koitharu.kotatsu.core.util.ext
 
-inline fun Long.ifZero(defaultValue: () -> Long): Long = if (this == 0L) defaultValue() else this
-
-fun longOf(a: Int, b: Int): Long {
-	return a.toLong() shl 32 or (b.toLong() and 0xffffffffL)
-}

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/String.kt

@@ -2,25 +2,11 @@ package org.koitharu.kotatsu.core.util.ext
 
 import android.content.Context
 import android.database.DatabaseUtils
-import androidx.annotation.FloatRange
+import androidx.collection.arraySetOf
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.parsers.util.ellipsize
-import org.koitharu.kotatsu.parsers.util.levenshteinDistance
 import java.util.UUID
 
-inline fun <C : CharSequence?> C?.ifNullOrEmpty(defaultValue: () -> C): C {
-	return if (this.isNullOrEmpty()) defaultValue() else this
-}
-
-fun String.longHashCode(): Long {
-	var h = 1125899906842597L
-	val len: Int = this.length
-	for (i in 0 until len) {
-		h = 31 * h + this[i].code
-	}
-	return h
-}
-
 fun String.toUUIDOrNull(): UUID? = try {
 	UUID.fromString(this)
 } catch (e: IllegalArgumentException) {
@@ -28,19 +14,35 @@ fun String.toUUIDOrNull(): UUID? = try {
 	null
 }
 
-fun String.digits() = filter { it.isDigit() }
+fun String.transliterate(skipMissing: Boolean): String {
-
+	val cyr = charArrayOf(
-/**
+		'а', 'б', 'в', 'г', 'д', 'е', 'ж', 'з', 'и', 'й', 'к', 'л', 'м', 'н', 'о', 'п',
- * @param threshold 0 = exact match
+		'р', 'с', 'т', 'у', 'ф', 'х', 'ц', 'ч', 'ш', 'щ', 'ъ', 'ы', 'ь', 'э', 'ю', 'я', 'ё', 'ў',
- */
+	)
-fun String.almostEquals(other: String, @FloatRange(from = 0.0) threshold: Float): Boolean {
+	val lat = arrayOf(
-	if (threshold == 0f) {
+		"a", "b", "v", "g", "d", "e", "zh", "z", "i", "y", "k", "l", "m", "n", "o", "p",
-		return equals(other, ignoreCase = true)
+		"r", "s", "t", "u", "f", "h", "ts", "ch", "sh", "sch", "", "i", "", "e", "ju", "ja", "jo", "w",
+	)
+	return buildString(length + 5) {
+		for (c in this@transliterate) {
+			val p = cyr.binarySearch(c.lowercaseChar())
+			if (p in lat.indices) {
+				if (c.isUpperCase()) {
+					append(lat[p].uppercase())
+				} else {
+					append(lat[p])
+				}
+			} else if (!skipMissing) {
+				append(c)
+			}
+		}
 	}
-	val diff = lowercase().levenshteinDistance(other.lowercase()) / ((length + other.length) / 2f)
-	return diff < threshold
 }
 
+fun String.toFileNameSafe(): String = this.transliterate(false)
+	.replace(Regex("[^a-z0-9_\\-]", arraySetOf(RegexOption.IGNORE_CASE)), " ")
+	.replace(Regex("\\s+"), "_")
+
 fun CharSequence.sanitize(): CharSequence {
 	return filterNot { c -> c.isReplacement() }
 }
@@ -68,10 +70,11 @@ fun <T> Collection<T>.joinToStringWithLimit(context: Context, limit: Int, transf
 	}
 }
 
-@Deprecated("",
+@Deprecated(
+	"",
 	ReplaceWith(
 		"sqlEscapeString(this)",
-		"android.database.DatabaseUtils.sqlEscapeString"
+		"android.database.DatabaseUtils.sqlEscapeString",
-	)
+	),
 )
 fun String.sqlEscape(): String = DatabaseUtils.sqlEscapeString(this)

app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/Throwable.kt

@@ -24,6 +24,7 @@ import org.koitharu.kotatsu.core.exceptions.ProxyConfigException
 import org.koitharu.kotatsu.core.exceptions.SyncApiException
 import org.koitharu.kotatsu.core.exceptions.UnsupportedFileException
 import org.koitharu.kotatsu.core.exceptions.UnsupportedSourceException
+import org.koitharu.kotatsu.core.exceptions.WrapperIOException
 import org.koitharu.kotatsu.core.exceptions.WrongPasswordException
 import org.koitharu.kotatsu.core.exceptions.resolve.ExceptionResolver
 import org.koitharu.kotatsu.core.io.NullOutputStream
@@ -37,6 +38,7 @@ import org.koitharu.kotatsu.parsers.exception.ContentUnavailableException
 import org.koitharu.kotatsu.parsers.exception.NotFoundException
 import org.koitharu.kotatsu.parsers.exception.ParseException
 import org.koitharu.kotatsu.parsers.exception.TooManyRequestExceptions
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.scrobbling.common.domain.ScrobblerAuthRequiredException
 import java.io.ObjectOutputStream
 import java.net.ConnectException
@@ -54,6 +56,8 @@ fun Throwable.getDisplayMessage(resources: Resources): String = getDisplayMessag
 	?: resources.getString(R.string.error_occurred)
 
 private fun Throwable.getDisplayMessageOrNull(resources: Resources): String? = when (this) {
+	is CaughtException -> cause.getDisplayMessageOrNull(resources)
+	is WrapperIOException -> cause.getDisplayMessageOrNull(resources)
 	is ScrobblerAuthRequiredException -> resources.getString(
 		R.string.scrobbler_auth_required,
 		resources.getString(scrobbler.titleResId),
@@ -141,7 +145,9 @@ fun Throwable.getCauseUrl(): String? = when (this) {
 	is ParseException -> url
 	is NotFoundException -> url
 	is TooManyRequestExceptions -> url
-	is CaughtException -> cause?.getCauseUrl()
+	is CaughtException -> cause.getCauseUrl()
+	is WrapperIOException -> cause.getCauseUrl()
+	is NoDataReceivedException -> url
 	is CloudFlareBlockedException -> url
 	is CloudFlareProtectedException -> url
 	is HttpStatusException -> url
@@ -174,7 +180,10 @@ fun Throwable.isReportable(): Boolean {
 		return true
 	}
 	if (this is CaughtException) {
-		return cause?.isReportable() == true
+		return cause.isReportable()
+	}
+	if (this is WrapperIOException) {
+		return cause.isReportable()
 	}
 	if (ExceptionResolver.canResolve(this)) {
 		return false

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt

@@ -77,7 +77,6 @@ import org.koitharu.kotatsu.core.util.ext.defaultPlaceholders
 import org.koitharu.kotatsu.core.util.ext.drawable
 import org.koitharu.kotatsu.core.util.ext.enqueueWith
 import org.koitharu.kotatsu.core.util.ext.getThemeColor
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.isTextTruncated
 import org.koitharu.kotatsu.core.util.ext.joinToStringWithLimit
 import org.koitharu.kotatsu.core.util.ext.mangaSourceExtra
@@ -113,6 +112,7 @@ import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.util.ellipsize
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.reader.ui.ReaderActivity
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblingInfo
 import org.koitharu.kotatsu.scrobbling.common.ui.selector.ScrobblingSelectorSheet
@@ -274,7 +274,7 @@ class DetailsActivity :
 				startActivity(
 					ImageActivity.newIntent(
 						v.context,
-						manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl },
+						manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl } ?: return,
 						manga.source,
 					),
 					scaleUpActivityOptionsOf(v),

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/pager/pages/PageThumbnailAD.kt

@@ -17,6 +17,7 @@ import org.koitharu.kotatsu.core.util.ext.newImageRequest
 import org.koitharu.kotatsu.core.util.ext.setTextColorAttr
 import org.koitharu.kotatsu.databinding.ItemPageThumbBinding
 import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import com.google.android.material.R as materialR
 
 fun pageThumbnailAD(
@@ -36,7 +37,7 @@ fun pageThumbnailAD(
 	AdapterDelegateClickListenerAdapter(this, clickListener).attach(itemView)
 
 	bind {
-		val data: Any = item.page.preview?.takeUnless { it.isEmpty() } ?: item.page.toMangaPage()
+		val data: Any = item.page.preview?.nullIfEmpty() ?: item.page.toMangaPage()
 		binding.imageViewThumb.newImageRequest(lifecycleOwner, data)?.run {
 			defaultPlaceholders(context)
 			size(thumbSize)

app/src/main/kotlin/org/koitharu/kotatsu/download/ui/dialog/DownloadDialogFragment.kt

@@ -27,7 +27,6 @@ import org.koitharu.kotatsu.core.ui.widgets.TwoLinesItemView
 import org.koitharu.kotatsu.core.util.ext.findActivity
 import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
 import org.koitharu.kotatsu.core.util.ext.joinToStringWithLimit
-import org.koitharu.kotatsu.core.util.ext.mapToArray
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
 import org.koitharu.kotatsu.core.util.ext.parentView
@@ -39,6 +38,7 @@ import org.koitharu.kotatsu.download.ui.list.DownloadsActivity
 import org.koitharu.kotatsu.main.ui.owners.BottomNavOwner
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.util.format
+import org.koitharu.kotatsu.parsers.util.mapToArray
 import org.koitharu.kotatsu.settings.storage.DirectoryModel
 import javax.inject.Inject
 

app/src/main/kotlin/org/koitharu/kotatsu/download/ui/dialog/DownloadDialogViewModel.kt

@@ -21,7 +21,6 @@ import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.core.util.ext.require
-import org.koitharu.kotatsu.core.util.ext.sizeOrZero
 import org.koitharu.kotatsu.download.ui.worker.DownloadTask
 import org.koitharu.kotatsu.download.ui.worker.DownloadWorker
 import org.koitharu.kotatsu.history.data.HistoryRepository
@@ -30,6 +29,7 @@ import org.koitharu.kotatsu.local.data.LocalStorageManager
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import org.koitharu.kotatsu.parsers.util.sizeOrZero
 import org.koitharu.kotatsu.parsers.util.suspendlazy.suspendLazy
 import org.koitharu.kotatsu.settings.storage.DirectoryModel
 import javax.inject.Inject

app/src/main/kotlin/org/koitharu/kotatsu/download/ui/worker/DownloadWorker.kt

@@ -60,7 +60,6 @@ import org.koitharu.kotatsu.core.util.ext.ensureSuccess
 import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
 import org.koitharu.kotatsu.core.util.ext.getWorkInputData
 import org.koitharu.kotatsu.core.util.ext.getWorkSpec
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.core.util.ext.withTicker
 import org.koitharu.kotatsu.core.util.ext.writeAllCancellable
@@ -79,6 +78,7 @@ import org.koitharu.kotatsu.parsers.exception.TooManyRequestExceptions
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.parsers.util.mapToSet
 import org.koitharu.kotatsu.parsers.util.requireBody
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
@@ -199,7 +199,7 @@ class DownloadWorker @AssistedInject constructor(
 					format = task.format ?: settings.preferredDownloadFormat,
 				)
 				val coverUrl = mangaDetails.largeCoverUrl.ifNullOrEmpty { mangaDetails.coverUrl }
-				if (coverUrl.isNotEmpty()) {
+				if (!coverUrl.isNullOrEmpty()) {
 					downloadFile(coverUrl, destination, repo.source).let { file ->
 						output.addCover(file, MimeTypeMap.getFileExtensionFromUrl(coverUrl))
 						file.deleteAwait()

app/src/main/kotlin/org/koitharu/kotatsu/explore/domain/ExploreRepository.kt

@@ -3,7 +3,6 @@ package org.koitharu.kotatsu.explore.domain
 import org.koitharu.kotatsu.core.model.isNsfw
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.core.util.ext.almostEquals
 import org.koitharu.kotatsu.core.util.ext.asArrayList
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
@@ -11,6 +10,7 @@ import org.koitharu.kotatsu.history.data.HistoryRepository
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.almostEquals
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.suggestions.domain.TagsBlacklist
 import javax.inject.Inject
@@ -77,7 +77,7 @@ class ExploreRepository @Inject constructor(
 		val list = repository.getList(
 			offset = 0,
 			order = order,
-			filter = MangaListFilter(tags = setOfNotNull(tag))
+			filter = MangaListFilter(tags = setOfNotNull(tag)),
 		).asArrayList()
 		if (settings.isSuggestionsExcludeNsfw) {
 			list.removeAll { it.isNsfw }

app/src/main/kotlin/org/koitharu/kotatsu/explore/ui/model/MangaSourceItem.kt

@@ -1,8 +1,8 @@
 package org.koitharu.kotatsu.explore.ui.model
 
 import org.koitharu.kotatsu.core.model.MangaSourceInfo
-import org.koitharu.kotatsu.core.util.ext.longHashCode
 import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.util.longHashCode
 
 data class MangaSourceItem(
 	val source: MangaSourceInfo,

app/src/main/kotlin/org/koitharu/kotatsu/favourites/domain/model/Cover.kt

@@ -3,7 +3,7 @@ package org.koitharu.kotatsu.favourites.domain.model
 import org.koitharu.kotatsu.core.model.MangaSource
 
 data class Cover(
-	val url: String,
+	val url: String?,
 	val source: String,
 ) {
 	val mangaSource by lazy { MangaSource(source) }

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/categories/select/FavoriteSheet.kt

@@ -65,7 +65,7 @@ class FavoriteSheet : BaseAdaptiveSheet<SheetFavoriteCategoriesBinding>(), OnLis
 		fun show(fm: FragmentManager, manga: Collection<Manga>) = FavoriteSheet().withArgs(1) {
 			putParcelableArrayList(
 				KEY_MANGA_LIST,
-				manga.mapTo(ArrayList(manga.size), ::ParcelableManga),
+				manga.mapTo(ArrayList(manga.size)) { ParcelableManga(it, withDescription = false) },
 			)
 		}.showDistinct(fm, TAG)
 	}

app/src/main/kotlin/org/koitharu/kotatsu/favourites/ui/categories/select/FavoriteSheetViewModel.kt

@@ -52,7 +52,8 @@ class FavoriteSheetViewModel @Inject constructor(
 		settings.observeAsFlow(AppSettings.KEY_TRACKER_ENABLED) { isTrackerEnabled },
 	) { categories, _, tracker ->
 		mapList(categories, tracker)
-	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(header))
+	}.withErrorHandling()
+		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(header))
 
 	fun setChecked(categoryId: Long, isChecked: Boolean) {
 		launchJob(Dispatchers.Default) {

app/src/main/kotlin/org/koitharu/kotatsu/filter/ui/FilterCoordinator.kt

@@ -36,6 +36,7 @@ import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
 import org.koitharu.kotatsu.parsers.model.YEAR_MIN
 import org.koitharu.kotatsu.parsers.util.ifZero
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.parsers.util.suspendlazy.suspendLazy
 import org.koitharu.kotatsu.remotelist.ui.RemoteListFragment
 import org.koitharu.kotatsu.search.domain.MangaSearchRepository
@@ -267,7 +268,7 @@ class FilterCoordinator @Inject constructor(
 	}
 
 	fun setQuery(value: String?) {
-		val newQuery = value?.trim()?.takeUnless { it.isEmpty() }
+		val newQuery = value?.trim()?.nullIfEmpty()
 		currentListFilter.update { oldValue ->
 			if (capabilities.isSearchWithFiltersSupported || newQuery == null) {
 				oldValue.copy(query = newQuery)

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/BadgeADUtil.kt

@@ -10,6 +10,7 @@ import com.google.android.material.badge.BadgeDrawable
 import com.google.android.material.badge.BadgeUtils
 import com.google.android.material.badge.ExperimentalBadgeUtils
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 
 @CheckResult
 fun View.bindBadge(badge: BadgeDrawable?, counter: Int): BadgeDrawable? {
@@ -34,7 +35,7 @@ private fun View.bindBadgeImpl(
 	if (counter > 0) {
 		badgeDrawable.number = counter
 	} else {
-		badgeDrawable.text = text?.takeUnless { it.isEmpty() }
+		badgeDrawable.text = text?.nullIfEmpty()
 	}
 	badgeDrawable.isVisible = true
 	badgeDrawable.align(this)

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaCompactListModel.kt

@@ -7,7 +7,7 @@ data class MangaCompactListModel(
 	override val id: Long,
 	override val title: String,
 	val subtitle: String,
-	override val coverUrl: String,
+	override val coverUrl: String?,
 	override val manga: Manga,
 	override val counter: Int,
 	override val progress: ReadingProgress?,

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaDetailedListModel.kt

@@ -8,7 +8,7 @@ data class MangaDetailedListModel(
 	override val id: Long,
 	override val title: String,
 	val subtitle: String?,
-	override val coverUrl: String,
+	override val coverUrl: String?,
 	override val manga: Manga,
 	override val counter: Int,
 	override val progress: ReadingProgress?,

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaGridModel.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.Manga
 data class MangaGridModel(
 	override val id: Long,
 	override val title: String,
-	override val coverUrl: String,
+	override val coverUrl: String?,
 	override val manga: Manga,
 	override val counter: Int,
 	override val progress: ReadingProgress?,

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaListModel.kt

@@ -11,7 +11,7 @@ sealed class MangaListModel : ListModel {
 	abstract val id: Long
 	abstract val manga: Manga
 	abstract val title: String
-	abstract val coverUrl: String
+	abstract val coverUrl: String?
 	abstract val counter: Int
 	abstract val isFavorite: Boolean
 	abstract val progress: ReadingProgress?

app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewFragment.kt

@@ -28,7 +28,6 @@ import org.koitharu.kotatsu.core.util.ext.crossfade
 import org.koitharu.kotatsu.core.util.ext.defaultPlaceholders
 import org.koitharu.kotatsu.core.util.ext.drawable
 import org.koitharu.kotatsu.core.util.ext.enqueueWith
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.mangaSourceExtra
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.scaleUpActivityOptionsOf
@@ -40,6 +39,7 @@ import org.koitharu.kotatsu.image.ui.ImageActivity
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaTag
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.reader.ui.ReaderActivity
 import org.koitharu.kotatsu.search.ui.MangaListActivity
 import javax.inject.Inject
@@ -100,7 +100,7 @@ class PreviewFragment : BaseFragment<FragmentPreviewBinding>(), View.OnClickList
 			R.id.imageView_cover -> startActivity(
 				ImageActivity.newIntent(
 					v.context,
-					manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl },
+					manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl } ?: return,
 					manga.source,
 				),
 				scaleUpActivityOptionsOf(v),

app/src/main/kotlin/org/koitharu/kotatsu/local/data/LocalMangaRepository.kt

@@ -152,7 +152,8 @@ class LocalMangaRepository @Inject constructor(
 			"Manga is not stored on local storage"
 		}.manga
 		LocalMangaUtil(subject).deleteChapters(ids)
-		localStorageChanges.emit(LocalManga(subject))
+		val updated = getDetails(subject)
+		localStorageChanges.emit(LocalManga(updated))
 	}
 
 	suspend fun getRemoteManga(localManga: Manga): Manga? {

app/src/main/kotlin/org/koitharu/kotatsu/local/data/PagesCache.kt

@@ -16,12 +16,12 @@ import okio.use
 import org.koitharu.kotatsu.core.exceptions.NoDataReceivedException
 import org.koitharu.kotatsu.core.util.FileSize
 import org.koitharu.kotatsu.core.util.ext.compressToPNG
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.core.util.ext.subdir
 import org.koitharu.kotatsu.core.util.ext.takeIfReadable
 import org.koitharu.kotatsu.core.util.ext.takeIfWriteable
 import org.koitharu.kotatsu.core.util.ext.writeAllCancellable
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.parsers.util.suspendlazy.suspendLazy
 import java.io.File

app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaParser.kt

@@ -22,8 +22,8 @@ import org.koitharu.kotatsu.core.util.ext.URI_SCHEME_ZIP
 import org.koitharu.kotatsu.core.util.ext.isFileUri
 import org.koitharu.kotatsu.core.util.ext.isRegularFile
 import org.koitharu.kotatsu.core.util.ext.isZipUri
-import org.koitharu.kotatsu.core.util.ext.longHashCode
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
+import org.koitharu.kotatsu.core.util.ext.toFileNameSafe
 import org.koitharu.kotatsu.core.util.ext.toListSorted
 import org.koitharu.kotatsu.local.data.MangaIndex
 import org.koitharu.kotatsu.local.data.hasZipExtension
@@ -33,10 +33,8 @@ import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaPage
-import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.longHashCode
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
-import org.koitharu.kotatsu.parsers.util.toCamelCase
-import org.koitharu.kotatsu.parsers.util.toFileNameSafe
 import java.io.File
 
 /**
@@ -61,26 +59,31 @@ class LocalMangaParser(private val uri: Uri) {
 		val mangaInfo = index?.getMangaInfo()
 		if (mangaInfo != null) {
 			val coverEntry: Path? = index.getCoverEntry()?.let { rootPath / it } ?: fileSystem.findFirstImage(rootPath)
-			mangaInfo.copyInternal(
+			mangaInfo.copy(
 				source = LocalMangaSource,
 				url = rootFile.toUri().toString(),
-				coverUrl = coverEntry?.let { uri.child(it, resolve = true).toString() }.orEmpty(),
+				coverUrl = coverEntry?.let { uri.child(it, resolve = true).toString() },
 				largeCoverUrl = null,
 				chapters = if (withDetails) {
-					mangaInfo.chapters?.map { c ->
+					mangaInfo.chapters?.mapNotNull { c ->
-						c.copyInternal(
+						val path = index.getChapterFileName(c.id)?.toPath()
-							url = index.getChapterFileName(c.id)?.toPath()?.let {
+						if (path != null && !fileSystem.exists(rootPath / path)) {
-								uri.child(it, resolve = false).toString()
+							null
-							} ?: uri.toString(),
+						} else {
-							source = LocalMangaSource,
+							c.copy(
-						)
+								url = path?.let {
+									uri.child(it, resolve = false).toString()
+								} ?: uri.toString(),
+								source = LocalMangaSource,
+							)
+						}
 					}
 				} else {
 					null
 				},
 			)
 		} else {
-			val title = rootFile.nameWithoutExtension.replace("_", " ").toCamelCase()
+			val title = rootFile.name.fileNameToTitle()
 			val coverEntry = fileSystem.findFirstImage(rootPath)
 			val mimeTypeMap = MimeTypeMap.getSingleton()
 			Manga(
@@ -89,9 +92,7 @@ class LocalMangaParser(private val uri: Uri) {
 				url = rootFile.toUri().toString(),
 				publicUrl = rootFile.toUri().toString(),
 				source = LocalMangaSource,
-				coverUrl = coverEntry?.let {
+				coverUrl = coverEntry?.let { uri.child(it, resolve = true).toString() },
-					uri.child(it, resolve = true).toString()
-				}.orEmpty(),
 				chapters = if (withDetails) {
 					val chapters = fileSystem.listRecursively(rootPath)
 						.mapNotNullTo(HashSet()) { path ->
@@ -111,7 +112,7 @@ class LocalMangaParser(private val uri: Uri) {
 						}.toString().removePrefix(Path.DIRECTORY_SEPARATOR)
 						MangaChapter(
 							id = "$i$s".longHashCode(),
-							name = s.ifEmpty { title },
+							name = s.fileNameToTitle().ifEmpty { title },
 							number = 0f,
 							volume = 0,
 							source = LocalMangaSource,
@@ -270,43 +271,8 @@ class LocalMangaParser(private val uri: Uri) {
 			Path.DIRECTORY_SEPARATOR + this
 		}.toPath()
 
-		private fun Manga.copyInternal(
+		private fun String.fileNameToTitle() = substringBeforeLast('.')
-			url: String = this.url,
+			.replace('_', ' ')
-			coverUrl: String = this.coverUrl,
+			.replaceFirstChar { it.uppercase() }
-			largeCoverUrl: String? = this.largeCoverUrl,
-			chapters: List<MangaChapter>? = this.chapters,
-			source: MangaSource = this.source,
-		): Manga = Manga(
-			id = id,
-			title = title,
-			altTitle = altTitle,
-			url = url,
-			publicUrl = publicUrl,
-			rating = rating,
-			isNsfw = isNsfw,
-			coverUrl = coverUrl,
-			tags = tags,
-			state = state,
-			author = author,
-			largeCoverUrl = largeCoverUrl,
-			description = description,
-			chapters = chapters,
-			source = source,
-		)
-
-		private fun MangaChapter.copyInternal(
-			url: String = this.url,
-			source: MangaSource = this.source,
-		) = MangaChapter(
-			id = id,
-			name = name,
-			number = number,
-			volume = volume,
-			url = url,
-			scanlator = scanlator,
-			uploadDate = uploadDate,
-			branch = branch,
-			source = source,
-		)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/local/data/output/LocalMangaDirOutput.kt

@@ -10,12 +10,12 @@ import okhttp3.internal.closeQuietly
 import org.koitharu.kotatsu.core.model.isLocal
 import org.koitharu.kotatsu.core.util.ext.deleteAwait
 import org.koitharu.kotatsu.core.util.ext.takeIfReadable
+import org.koitharu.kotatsu.core.util.ext.toFileNameSafe
 import org.koitharu.kotatsu.core.zip.ZipOutput
 import org.koitharu.kotatsu.local.data.MangaIndex
 import org.koitharu.kotatsu.local.data.input.LocalMangaParser
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
-import org.koitharu.kotatsu.parsers.util.toFileNameSafe
 import java.io.File
 
 class LocalMangaDirOutput(
@@ -96,7 +96,9 @@ class LocalMangaDirOutput(
 	}
 
 	suspend fun deleteChapters(ids: Set<Long>) = mutex.withLock {
-		val chapters = checkNotNull((index.getMangaInfo() ?: LocalMangaParser(rootFile).getManga(withDetails = true).manga).chapters) {
+		val chapters = checkNotNull(
+			(index.getMangaInfo() ?: LocalMangaParser(rootFile).getManga(withDetails = true).manga).chapters,
+		) {
 			"No chapters found"
 		}.withIndex()
 		val victimsIds = ids.toMutableSet()

app/src/main/kotlin/org/koitharu/kotatsu/local/data/output/LocalMangaOutput.kt

@@ -7,11 +7,11 @@ import kotlinx.coroutines.withContext
 import okio.Closeable
 import org.koitharu.kotatsu.core.prefs.DownloadFormat
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
+import org.koitharu.kotatsu.core.util.ext.toFileNameSafe
 import org.koitharu.kotatsu.local.data.input.LocalMangaParser
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
-import org.koitharu.kotatsu.parsers.util.toFileNameSafe
 import java.io.File
 
 sealed class LocalMangaOutput(

app/src/main/kotlin/org/koitharu/kotatsu/local/domain/DeleteReadChaptersUseCase.kt

@@ -1,7 +1,6 @@
 package org.koitharu.kotatsu.local.domain
 
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.buffer
 import kotlinx.coroutines.flow.channelFlow
 import kotlinx.coroutines.flow.fold
@@ -13,7 +12,6 @@ import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.history.data.HistoryRepository
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
-import org.koitharu.kotatsu.local.data.LocalStorageChanges
 import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
@@ -26,7 +24,6 @@ class DeleteReadChaptersUseCase @Inject constructor(
 	private val localMangaRepository: LocalMangaRepository,
 	private val historyRepository: HistoryRepository,
 	private val mangaRepositoryFactory: MangaRepository.Factory,
-	@LocalStorageChanges private val localStorageChanges: MutableSharedFlow<LocalManga?>,
 ) {
 
 	suspend operator fun invoke(manga: Manga): Int {
@@ -37,7 +34,6 @@ class DeleteReadChaptersUseCase @Inject constructor(
 		}
 		val task = getDeletionTask(localManga) ?: return 0
 		localMangaRepository.deleteChapters(task.manga.manga, task.chaptersIds)
-		emitUpdate(localManga)
 		return task.chaptersIds.size
 	}
 
@@ -62,7 +58,6 @@ class DeleteReadChaptersUseCase @Inject constructor(
 		}.buffer().map {
 			runCatchingCancellable {
 				localMangaRepository.deleteChapters(it.manga.manga, it.chaptersIds)
-				emitUpdate(it.manga)
 				it.chaptersIds.size
 			}.onFailure {
 				it.printStackTraceDebug()
@@ -88,11 +83,6 @@ class DeleteReadChaptersUseCase @Inject constructor(
 		}
 	}
 
-	private suspend fun emitUpdate(subject: LocalManga) {
-		val updated = localMangaRepository.getDetails(subject.manga)
-		localStorageChanges.emit(subject.copy(manga = updated))
-	}
-
 	private suspend fun getAllChapters(manga: LocalManga): List<MangaChapter> = runCatchingCancellable {
 		val remoteManga = checkNotNull(localMangaRepository.getRemoteManga(manga.manga))
 		checkNotNull(mangaRepositoryFactory.create(remoteManga.source).getDetails(remoteManga).chapters)

app/src/main/kotlin/org/koitharu/kotatsu/local/ui/ImportService.kt

@@ -152,7 +152,8 @@ class ImportService : CoroutineIntentService() {
 		private const val CHANNEL_ID = "importing"
 		private const val FOREGROUND_NOTIFICATION_ID = 37
 
-		fun start(context: Context, uris: Iterable<Uri>): Boolean = try {
+		fun start(context: Context, uris: Collection<Uri>): Boolean = try {
+			require(uris.isNotEmpty())
 			for (uri in uris) {
 				val intent = Intent(context, ImportService::class.java)
 				intent.putExtra(DATA_URI, uri.toString())

app/src/main/kotlin/org/koitharu/kotatsu/main/domain/CoverRestoreInterceptor.kt

@@ -10,11 +10,11 @@ import org.koitharu.kotatsu.core.model.isLocal
 import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.util.ext.bookmarkKey
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.mangaKey
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.util.findById
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import java.util.Collections
 import javax.inject.Inject

app/src/main/kotlin/org/koitharu/kotatsu/reader/domain/PageLoader.kt

@@ -185,11 +185,8 @@ class PageLoader @Inject constructor(
 		prefetchLock.withLock {
 			while (prefetchQueue.isNotEmpty()) {
 				val page = prefetchQueue.pollFirst() ?: return@launch
-				if (cache.get(page.url) == null) {
+				synchronized(tasks) {
-					synchronized(tasks) {
+					tasks[page.id] = loadPageAsyncImpl(page, skipCache = false, isPrefetch = true)
-						tasks[page.id] = loadPageAsyncImpl(page, skipCache = false, isPrefetch = true)
-					}
-					return@launch
 				}
 			}
 		}
@@ -202,12 +199,14 @@ class PageLoader @Inject constructor(
 	): ProgressDeferred<Uri, Float> {
 		val progress = MutableStateFlow(PROGRESS_UNDEFINED)
 		val deferred = loaderScope.async {
-			if (!skipCache) {
-				cache.get(page.url)?.let { return@async it.toUri() }
-			}
 			counter.incrementAndGet()
 			try {
-				loadPageImpl(page, progress, isPrefetch)
+				loadPageImpl(
+					page = page,
+					progress = progress,
+					isPrefetch = isPrefetch,
+					skipCache = skipCache,
+				)
 			} finally {
 				if (counter.decrementAndGet() == 0) {
 					onIdle()
@@ -231,9 +230,13 @@ class PageLoader @Inject constructor(
 		page: MangaPage,
 		progress: MutableStateFlow<Float>,
 		isPrefetch: Boolean,
+		skipCache: Boolean,
 	): Uri = semaphore.withPermit {
 		val pageUrl = getPageUrl(page)
 		check(pageUrl.isNotBlank()) { "Cannot obtain full image url for $page" }
+		if (!skipCache) {
+			cache.get(pageUrl)?.let { return it.toUri() }
+		}
 		val uri = Uri.parse(pageUrl)
 		return when {
 			uri.isZipUri() -> if (uri.scheme == URI_SCHEME_ZIP) {

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

@@ -31,12 +31,12 @@ import okio.source
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.util.ext.isFileUri
 import org.koitharu.kotatsu.core.util.ext.isZipUri
+import org.koitharu.kotatsu.core.util.ext.toFileNameSafe
 import org.koitharu.kotatsu.core.util.ext.toFileOrNull
 import org.koitharu.kotatsu.core.util.ext.writeAllCancellable
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaPage
-import org.koitharu.kotatsu.parsers.util.toFileNameSafe
 import org.koitharu.kotatsu.reader.domain.PageLoader
 import java.io.File
 import java.text.SimpleDateFormat

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

@@ -209,6 +209,9 @@ class ReaderInfoBarView @JvmOverloads constructor(
 	}
 
 	private fun Drawable.drawWithOutline(canvas: Canvas) {
+		if (bounds.isEmpty) {
+			return
+		}
 		var requiredScale = (bounds.width() + paint.strokeWidth * 2f) / bounds.width().toFloat()
 		setTint(colorOutline)
 		canvas.withScale(requiredScale, requiredScale, bounds.exactCenterX(), bounds.exactCenterY()) {

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

@@ -40,9 +40,7 @@ import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.prefs.observeAsStateFlow
 import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.requireValue
-import org.koitharu.kotatsu.core.util.ext.sizeOrZero
 import org.koitharu.kotatsu.details.data.MangaDetails
 import org.koitharu.kotatsu.details.domain.DetailsInteractor
 import org.koitharu.kotatsu.details.domain.DetailsLoadUseCase
@@ -57,6 +55,8 @@ import org.koitharu.kotatsu.local.domain.DeleteLocalMangaUseCase
 import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
+import org.koitharu.kotatsu.parsers.util.sizeOrZero
 import org.koitharu.kotatsu.reader.domain.ChaptersLoader
 import org.koitharu.kotatsu.reader.domain.DetectReaderModeUseCase
 import org.koitharu.kotatsu.reader.domain.PageLoader

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

@@ -38,6 +38,7 @@ import org.koitharu.kotatsu.databinding.ActivityColorFilterBinding
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaPage
 import org.koitharu.kotatsu.parsers.util.format
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.reader.domain.ReaderColorFilter
 import javax.inject.Inject
 import com.google.android.material.R as materialR
@@ -137,7 +138,7 @@ class ColorFilterConfigActivity :
 	}
 
 	private fun loadPreview(page: MangaPage) {
-		val data: Any = page.preview?.takeUnless { it.isEmpty() } ?: page
+		val data: Any = page.preview?.nullIfEmpty() ?: page
 		ImageRequest.Builder(this@ColorFilterConfigActivity)
 			.data(data)
 			.scale(Scale.FILL)

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

@@ -8,9 +8,9 @@ import kotlinx.coroutines.withContext
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.ParserMangaRepository
-import org.koitharu.kotatsu.core.util.ext.mapToArray
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.mapToArray
 import org.koitharu.kotatsu.parsers.util.suspendlazy.getOrNull
 import org.koitharu.kotatsu.parsers.util.suspendlazy.suspendLazy
 import kotlin.coroutines.resume

app/src/main/kotlin/org/koitharu/kotatsu/remotelist/ui/RemoteListViewModel.kt

@@ -26,7 +26,6 @@ import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
 import org.koitharu.kotatsu.core.util.ext.call
 import org.koitharu.kotatsu.core.util.ext.getCauseUrl
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
-import org.koitharu.kotatsu.core.util.ext.sizeOrZero
 import org.koitharu.kotatsu.download.ui.worker.DownloadWorker
 import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
 import org.koitharu.kotatsu.explore.domain.ExploreRepository
@@ -40,6 +39,7 @@ import org.koitharu.kotatsu.list.ui.model.LoadingState
 import org.koitharu.kotatsu.list.ui.model.toErrorFooter
 import org.koitharu.kotatsu.list.ui.model.toErrorState
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.util.sizeOrZero
 import javax.inject.Inject
 
 private const val FILTER_MIN_INTERVAL = 250L

app/src/main/kotlin/org/koitharu/kotatsu/scrobbling/common/data/ScrobblerStorage.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.scrobbling.common.data
 import android.content.Context
 import androidx.core.content.edit
 import org.jsoup.internal.StringUtil.StringJoiner
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerService
 import org.koitharu.kotatsu.scrobbling.common.domain.model.ScrobblerUser
 
@@ -31,7 +32,7 @@ class ScrobblerStorage(context: Context, service: ScrobblerService) {
 			ScrobblerUser(
 				id = lines[0].toLong(),
 				nickname = lines[1],
-				avatar = lines[2].takeUnless(String::isEmpty),
+				avatar = lines[2].nullIfEmpty(),
 				service = ScrobblerService.valueOf(lines[3]),
 			)
 		}

app/src/main/kotlin/org/koitharu/kotatsu/scrobbling/kitsu/data/KitsuInterceptor.kt

@@ -7,6 +7,7 @@ import okhttp3.internal.closeQuietly
 import okio.IOException
 import org.koitharu.kotatsu.core.network.CommonHeaders
 import org.koitharu.kotatsu.parsers.util.mimeType
+import org.koitharu.kotatsu.parsers.util.nullIfEmpty
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.scrobbling.common.data.ScrobblerStorage
@@ -34,7 +35,7 @@ class KitsuInterceptor(private val storage: ScrobblerStorage) : Interceptor {
 		}
 		if (response.mimeType?.toMediaTypeOrNull()?.subtype == SUBTYPE_HTML) {
 			val message = runCatchingCancellable {
-				response.parseHtml().title().takeUnless { it.isEmpty() }
+				response.parseHtml().title().nullIfEmpty()
 			}.onFailure {
 				response.closeQuietly()
 			}.getOrNull() ?: "Invalid response (${response.code})"

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/suggestion/SearchSuggestionViewModel.kt

@@ -21,11 +21,11 @@ import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.prefs.observeAsStateFlow
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.ui.widgets.ChipsView
-import org.koitharu.kotatsu.core.util.ext.sizeOrZero
 import org.koitharu.kotatsu.explore.data.MangaSourcesRepository
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.util.mapToSet
+import org.koitharu.kotatsu.parsers.util.sizeOrZero
 import org.koitharu.kotatsu.search.domain.MangaSearchRepository
 import org.koitharu.kotatsu.search.ui.suggestion.model.SearchSuggestionItem
 import javax.inject.Inject

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

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.settings
 import android.os.Bundle
 import android.view.View
 import androidx.annotation.StringRes
+import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.preference.Preference
 import dagger.hilt.android.AndroidEntryPoint
@@ -10,12 +11,16 @@ import org.koitharu.kotatsu.BuildConfig
 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.addMenuProvider
 import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.settings.search.SettingsSearchMenuProvider
+import org.koitharu.kotatsu.settings.search.SettingsSearchViewModel
 
 @AndroidEntryPoint
 class RootSettingsFragment : BasePreferenceFragment(0) {
 
 	private val viewModel: RootSettingsViewModel by viewModels()
+	private val activityViewModel: SettingsSearchViewModel by activityViewModels()
 
 	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
 		addPreferencesFromResource(R.xml.pref_root)
@@ -41,6 +46,8 @@ class RootSettingsFragment : BasePreferenceFragment(0) {
 				}
 			}
 		}
+		addMenuProvider(SettingsSearchMenuProvider(activityViewModel))
+		addMenuProvider(SettingsMenuProvider(view.context))
 	}
 
 	override fun setTitle(title: CharSequence?) {

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

@@ -34,7 +34,6 @@ import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.settings.about.AboutSettingsFragment
 import org.koitharu.kotatsu.settings.search.SettingsItem
 import org.koitharu.kotatsu.settings.search.SettingsSearchFragment
-import org.koitharu.kotatsu.settings.search.SettingsSearchMenuProvider
 import org.koitharu.kotatsu.settings.search.SettingsSearchViewModel
 import org.koitharu.kotatsu.settings.sources.SourceSettingsFragment
 import org.koitharu.kotatsu.settings.sources.SourcesSettingsFragment
@@ -76,8 +75,6 @@ class SettingsActivity :
 		}
 		viewModel.isSearchActive.observe(this, ::toggleSearchMode)
 		viewModel.onNavigateToPreference.observeEvent(this, ::navigateToPreference)
-		addMenuProvider(SettingsSearchMenuProvider(viewModel))
-		addMenuProvider(SettingsMenuProvider(this))
 	}
 
 	override fun onPreferenceStartFragment(
@@ -174,8 +171,9 @@ class SettingsActivity :
 	}
 
 	private fun navigateToPreference(item: SettingsItem) {
-		val args = Bundle(1)
+		val args = Bundle(1).apply {
-		args.putString(ARG_PREF_KEY, item.key)
+			putString(ARG_PREF_KEY, item.key)
+		}
 		openFragment(item.fragmentClass, args, true)
 	}
 

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

@@ -44,6 +44,6 @@ class SyncSettingsFragment : BasePreferenceFragment(R.string.sync_settings), Fra
 
 	private fun bindHostSummary() {
 		val preference = findPreference<Preference>(SyncSettings.KEY_SYNC_URL) ?: return
-		preference.summary = syncSettings.syncURL
+		preference.summary = syncSettings.syncUrl
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AboutSettingsFragment.kt

@@ -10,6 +10,7 @@ import androidx.preference.Preference
 import androidx.preference.SwitchPreferenceCompat
 import com.google.android.material.snackbar.Snackbar
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.flow.combine
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.github.AppVersion
@@ -29,10 +30,8 @@ class AboutSettingsFragment : BasePreferenceFragment(R.string.about) {
 		addPreferencesFromResource(R.xml.pref_about)
 		findPreference<Preference>(AppSettings.KEY_APP_VERSION)?.run {
 			title = getString(R.string.app_version, BuildConfig.VERSION_NAME)
-			isEnabled = viewModel.isUpdateSupported
 		}
 		findPreference<SwitchPreferenceCompat>(AppSettings.KEY_UPDATES_UNSTABLE)?.run {
-			isVisible = viewModel.isUpdateSupported
 			isEnabled = VersionId(BuildConfig.VERSION_NAME).isStable
 			if (!isEnabled) isChecked = true
 		}
@@ -40,9 +39,12 @@ class AboutSettingsFragment : BasePreferenceFragment(R.string.about) {
 
 	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
 		super.onViewCreated(view, savedInstanceState)
-		viewModel.isLoading.observe(viewLifecycleOwner) {
+		combine(viewModel.isUpdateSupported, viewModel.isLoading, ::Pair)
-			findPreference<Preference>(AppSettings.KEY_APP_UPDATE)?.isEnabled = !it
+			.observe(viewLifecycleOwner) { (isUpdateSupported, isLoading) ->
-		}
+				findPreference<Preference>(AppSettings.KEY_UPDATES_UNSTABLE)?.isVisible = isUpdateSupported
+				findPreference<Preference>(AppSettings.KEY_APP_VERSION)?.isEnabled = isUpdateSupported && !isLoading
+
+			}
 		viewModel.onUpdateAvailable.observeEvent(viewLifecycleOwner, ::onUpdateAvailable)
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AboutSettingsViewModel.kt

@@ -1,6 +1,10 @@
 package org.koitharu.kotatsu.settings.about
 
+import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.stateIn
 import org.koitharu.kotatsu.core.github.AppUpdateRepository
 import org.koitharu.kotatsu.core.github.AppVersion
 import org.koitharu.kotatsu.core.ui.BaseViewModel
@@ -13,7 +17,10 @@ class AboutSettingsViewModel @Inject constructor(
 	private val appUpdateRepository: AppUpdateRepository,
 ) : BaseViewModel() {
 
-	val isUpdateSupported = appUpdateRepository.isUpdateSupported()
+	val isUpdateSupported = flow {
+		emit(appUpdateRepository.isUpdateSupported())
+	}.stateIn(viewModelScope, SharingStarted.Eagerly, false)
+
 	val onUpdateAvailable = MutableEventFlow<AppVersion?>()
 
 	fun checkForUpdates() {

app/src/main/kotlin/org/koitharu/kotatsu/settings/search/SettingsSearchFragment.kt

@@ -7,6 +7,8 @@ import android.view.ViewGroup
 import androidx.core.graphics.Insets
 import androidx.core.view.updatePadding
 import androidx.fragment.app.activityViewModels
+import androidx.recyclerview.widget.AsyncListDiffer.ListListener
+import androidx.recyclerview.widget.LinearLayoutManager
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.BaseFragment
@@ -17,7 +19,9 @@ import org.koitharu.kotatsu.databinding.FragmentSearchSuggestionBinding
 import org.koitharu.kotatsu.list.ui.adapter.ListItemType
 
 @AndroidEntryPoint
-class SettingsSearchFragment : BaseFragment<FragmentSearchSuggestionBinding>(), OnListItemClickListener<SettingsItem> {
+class SettingsSearchFragment : BaseFragment<FragmentSearchSuggestionBinding>(),
+	OnListItemClickListener<SettingsItem>,
+	ListListener<SettingsItem> {
 
 	private val viewModel: SettingsSearchViewModel by activityViewModels()
 
@@ -29,6 +33,7 @@ class SettingsSearchFragment : BaseFragment<FragmentSearchSuggestionBinding>(),
 		super.onViewBindingCreated(binding, savedInstanceState)
 		val adapter = BaseListAdapter<SettingsItem>()
 			.addDelegate(ListItemType.NAV_ITEM, settingsItemAD(this))
+		adapter.addListListener(this)
 		binding.root.adapter = adapter
 		binding.root.setHasFixedSize(true)
 		viewModel.content.observe(viewLifecycleOwner, adapter)
@@ -45,4 +50,13 @@ class SettingsSearchFragment : BaseFragment<FragmentSearchSuggestionBinding>(),
 	}
 
 	override fun onItemClick(item: SettingsItem, view: View) = viewModel.navigateToPreference(item)
+
+	override fun onCurrentListChanged(
+		previousList: List<SettingsItem?>,
+		currentList: List<SettingsItem?>
+	) {
+		if (currentList.size != previousList.size) {
+			(viewBinding?.root?.layoutManager as? LinearLayoutManager)?.scrollToPositionWithOffset(0, 0)
+		}
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/settings/search/SettingsSearchHelper.kt

@@ -13,9 +13,12 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.settings.AppearanceSettingsFragment
 import org.koitharu.kotatsu.settings.DownloadsSettingsFragment
 import org.koitharu.kotatsu.settings.NetworkSettingsFragment
+import org.koitharu.kotatsu.settings.ProxySettingsFragment
 import org.koitharu.kotatsu.settings.ReaderSettingsFragment
 import org.koitharu.kotatsu.settings.ServicesSettingsFragment
+import org.koitharu.kotatsu.settings.SuggestionsSettingsFragment
 import org.koitharu.kotatsu.settings.about.AboutSettingsFragment
+import org.koitharu.kotatsu.settings.backup.PeriodicalBackupSettingsFragment
 import org.koitharu.kotatsu.settings.sources.SourcesSettingsFragment
 import org.koitharu.kotatsu.settings.tracker.TrackerSettingsFragment
 import org.koitharu.kotatsu.settings.userdata.UserDataSettingsFragment
@@ -39,6 +42,30 @@ class SettingsSearchHelper @Inject constructor(
 		preferenceManager.inflateTo(result, R.xml.pref_tracker, emptyList(), TrackerSettingsFragment::class.java)
 		preferenceManager.inflateTo(result, R.xml.pref_services, emptyList(), ServicesSettingsFragment::class.java)
 		preferenceManager.inflateTo(result, R.xml.pref_about, emptyList(), AboutSettingsFragment::class.java)
+		preferenceManager.inflateTo(
+			result,
+			R.xml.pref_backup_periodic,
+			listOf(context.getString(R.string.data_and_privacy)),
+			PeriodicalBackupSettingsFragment::class.java,
+		)
+		preferenceManager.inflateTo(
+			result,
+			R.xml.pref_proxy,
+			listOf(context.getString(R.string.proxy)),
+			ProxySettingsFragment::class.java,
+		)
+		preferenceManager.inflateTo(
+			result,
+			R.xml.pref_suggestions,
+			listOf(context.getString(R.string.suggestions)),
+			SuggestionsSettingsFragment::class.java,
+		)
+		preferenceManager.inflateTo(
+			result,
+			R.xml.pref_sources,
+			listOf(context.getString(R.string.remote_sources)),
+			SourcesSettingsFragment::class.java,
+		)
 		return result
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/settings/search/SettingsSearchMenuProvider.kt

@@ -22,18 +22,20 @@ class SettingsSearchMenuProvider(
 
 	override fun onPrepareMenu(menu: Menu) {
 		super.onPrepareMenu(menu)
-		val currentQuery = viewModel.currentQuery
+		if (viewModel.isSearchActive.value) {
-		if (currentQuery.isNotEmpty()) {
 			val menuItem = menu.findItem(R.id.action_search)
 			menuItem.expandActionView()
 			val searchView = menuItem.actionView as SearchView
-			searchView.setQuery(currentQuery, false)
+			searchView.setQuery(viewModel.currentQuery, false)
 		}
 	}
 
 	override fun onMenuItemSelected(menuItem: MenuItem): Boolean = false
 
-	override fun onMenuItemActionExpand(item: MenuItem): Boolean = true
+	override fun onMenuItemActionExpand(item: MenuItem): Boolean {
+		viewModel.startSearch()
+		return true
+	}
 
 	override fun onMenuItemActionCollapse(item: MenuItem): Boolean {
 		viewModel.discardSearch()

app/src/main/kotlin/org/koitharu/kotatsu/settings/search/SettingsSearchViewModel.kt

@@ -18,30 +18,43 @@ class SettingsSearchViewModel @Inject constructor(
 	private val searchHelper: SettingsSearchHelper,
 ) : BaseViewModel() {
 
-	private val query = MutableStateFlow("")
+	private val query = MutableStateFlow<String?>(null)
 	private val allSettings by lazy {
 		searchHelper.inflatePreferences()
 	}
 
 	val content = query.map { q ->
-		allSettings.filter { it.title.contains(q, ignoreCase = true) }
+		if (q == null) {
+			emptyList()
+		} else {
+			allSettings.filter { it.title.contains(q, ignoreCase = true) }
+		}
 	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Lazily, emptyList())
 
 	val isSearchActive = query.map {
-		it.isNotEmpty()
+		it != null
-	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Lazily, false)
+	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Lazily, query.value != null)
 
 	val onNavigateToPreference = MutableEventFlow<SettingsItem>()
 	val currentQuery: String
-		get() = query.value
+		get() = query.value.orEmpty()
 
 	fun onQueryChanged(value: String) {
-		query.value = value
+		if (query.value != null) {
+			query.value = value
+		}
 	}
 
-	fun discardSearch() = onQueryChanged("")
+	fun discardSearch() {
+		query.value = null
+	}
+
+	fun startSearch() {
+		query.value = query.value.orEmpty()
+	}
 
 	fun navigateToPreference(item: SettingsItem) {
+		discardSearch()
 		onNavigateToPreference.call(item)
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/settings/sources/SourceSettingsExt.kt

@@ -10,9 +10,9 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.parser.EmptyMangaRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.ParserMangaRepository
-import org.koitharu.kotatsu.core.util.ext.mapToArray
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.network.UserAgents
+import org.koitharu.kotatsu.parsers.util.mapToArray
 import org.koitharu.kotatsu.settings.utils.AutoCompleteTextViewPreference
 import org.koitharu.kotatsu.settings.utils.EditTextBindListener
 import org.koitharu.kotatsu.settings.utils.EditTextDefaultSummaryProvider
@@ -119,6 +119,6 @@ private fun PreferenceFragmentCompat.addPreferencesFromEmptyRepository() {
 	preferenceScreen.addPreference(preference)
 }
 
-private fun Array<out String>.toStringArray(): Array<String> {
+private fun Array<out String?>.toStringArray(): Array<String> {
-	return Array(size) { i -> this[i] as? String ?: "" }
+	return Array(size) { i -> this[i].orEmpty() }
 }

app/src/main/kotlin/org/koitharu/kotatsu/settings/utils/EditTextDefaultSummaryProvider.kt

@@ -16,4 +16,4 @@ class EditTextDefaultSummaryProvider(
 			text
 		}
 	}
-}
+}

app/src/main/kotlin/org/koitharu/kotatsu/suggestions/domain/TagsBlacklist.kt

@@ -1,8 +1,8 @@
 package org.koitharu.kotatsu.suggestions.domain
 
-import org.koitharu.kotatsu.core.util.ext.almostEquals
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaTag
+import org.koitharu.kotatsu.parsers.util.almostEquals
 
 class TagsBlacklist(
 	private val tags: Set<String>,

app/src/main/kotlin/org/koitharu/kotatsu/suggestions/ui/SuggestionsWorker.kt

@@ -51,7 +51,6 @@ import org.koitharu.kotatsu.core.model.distinctById
 import org.koitharu.kotatsu.core.model.isNsfw
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.core.util.ext.almostEquals
 import org.koitharu.kotatsu.core.util.ext.asArrayList
 import org.koitharu.kotatsu.core.util.ext.awaitUniqueWorkInfoByName
 import org.koitharu.kotatsu.core.util.ext.awaitWorkInfosByTag
@@ -60,7 +59,6 @@ import org.koitharu.kotatsu.core.util.ext.flatten
 import org.koitharu.kotatsu.core.util.ext.mangaSourceExtra
 import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
 import org.koitharu.kotatsu.core.util.ext.sanitize
-import org.koitharu.kotatsu.core.util.ext.sizeOrZero
 import org.koitharu.kotatsu.core.util.ext.takeMostFrequent
 import org.koitharu.kotatsu.core.util.ext.toBitmapOrNull
 import org.koitharu.kotatsu.core.util.ext.trySetForeground
@@ -73,7 +71,9 @@ import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.almostEquals
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import org.koitharu.kotatsu.parsers.util.sizeOrZero
 import org.koitharu.kotatsu.reader.ui.ReaderActivity.IntentBuilder
 import org.koitharu.kotatsu.settings.SettingsActivity
 import org.koitharu.kotatsu.settings.work.PeriodicWorkScheduler

app/src/main/kotlin/org/koitharu/kotatsu/sync/data/SyncAuthenticator.kt

@@ -32,7 +32,7 @@ class SyncAuthenticator(
 	private fun tryRefreshToken() = runCatching {
 		runBlocking {
 			authApi.authenticate(
-				syncSettings.syncURL,
+				syncSettings.syncUrl,
 				account.name,
 				accountManager.getPassword(account),
 			)

app/src/main/kotlin/org/koitharu/kotatsu/sync/data/SyncSettings.kt

@@ -6,7 +6,7 @@ import android.content.Context
 import androidx.annotation.WorkerThread
 import dagger.hilt.android.qualifiers.ApplicationContext
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import javax.inject.Inject
 
 class SyncSettings(
@@ -27,13 +27,9 @@ class SyncSettings(
 
 	@get:WorkerThread
 	@set:WorkerThread
-	var syncURL: String
+	var syncUrl: String
 		get() = account?.let {
-			val result = accountManager.getUserData(it, KEY_SYNC_URL)
+			accountManager.getUserData(it, KEY_SYNC_URL)?.withHttpSchema()
-			if (!result.startsWith("http://") && !result.startsWith("https://")) {
-				return "http://$result"
-			}
-			return result
 		}.ifNullOrEmpty { defaultSyncUrl }
 		set(value) {
 			account?.let {
@@ -43,6 +39,12 @@ class SyncSettings(
 
 	companion object {
 
+		private fun String.withHttpSchema(): String = if (!startsWith("http://") && !startsWith("https://")) {
+			"http://$this"
+		} else {
+			this
+		}
+
 		const val KEY_SYNC_URL = "host"
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/sync/domain/SyncHelper.kt

@@ -59,7 +59,7 @@ class SyncHelper @AssistedInject constructor(
 		.addInterceptor(SyncInterceptor(context, account))
 		.build()
 	private val baseUrl: String by lazy {
-		settings.syncURL
+		settings.syncUrl
 	}
 	private val defaultGcPeriod: Long // gc period if sync enabled
 		get() = TimeUnit.DAYS.toMillis(4)

app/src/main/kotlin/org/koitharu/kotatsu/sync/ui/SyncHostDialogFragment.kt

@@ -13,9 +13,9 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import dagger.hilt.android.AndroidEntryPoint
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.ui.AlertDialogFragment
-import org.koitharu.kotatsu.core.util.ext.ifNullOrEmpty
 import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.PreferenceDialogAutocompletetextviewBinding
+import org.koitharu.kotatsu.parsers.util.ifNullOrEmpty
 import org.koitharu.kotatsu.settings.utils.validation.UrlValidator
 import org.koitharu.kotatsu.sync.data.SyncSettings
 import javax.inject.Inject
@@ -52,7 +52,7 @@ class SyncHostDialogFragment : AlertDialogFragment<PreferenceDialogAutocompletet
 		binding.message.setText(R.string.sync_host_description)
 		val entries = binding.root.resources.getStringArray(R.array.sync_url_list)
 		val editText = binding.edit
-		editText.setText(arguments?.getString(KEY_SYNC_URL).ifNullOrEmpty { syncSettings.syncURL })
+		editText.setText(arguments?.getString(KEY_SYNC_URL).ifNullOrEmpty { syncSettings.syncUrl })
 		editText.threshold = 0
 		editText.setAdapter(ArrayAdapter(binding.root.context, android.R.layout.simple_spinner_dropdown_item, entries))
 		binding.dropdown.setOnClickListener {
@@ -69,7 +69,7 @@ class SyncHostDialogFragment : AlertDialogFragment<PreferenceDialogAutocompletet
 				if (!result.startsWith("https://") && !result.startsWith("http://")) {
 					scheme = "http://"
 				}
-				syncSettings.syncURL = "$scheme$result"
+				syncSettings.syncUrl = "$scheme$result"
 				parentFragmentManager.setFragmentResult(REQUEST_KEY, bundleOf(KEY_SYNC_URL to "$scheme$result"))
 			}
 		}

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/CheckNewChaptersUseCase.kt

@@ -1,6 +1,8 @@
 package org.koitharu.kotatsu.tracker.domain
 
+import android.util.Log
 import coil3.request.CachePolicy
+import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.core.model.getPreferredBranch
 import org.koitharu.kotatsu.core.model.isLocal
 import org.koitharu.kotatsu.core.parser.CachingMangaRepository
@@ -11,6 +13,7 @@ import org.koitharu.kotatsu.core.util.ext.toInstantOrNull
 import org.koitharu.kotatsu.history.data.HistoryRepository
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.util.findById
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.tracker.domain.model.MangaTracking
 import org.koitharu.kotatsu.tracker.domain.model.MangaUpdates
@@ -45,8 +48,9 @@ class CheckNewChaptersUseCase @Inject constructor(
 		runCatchingCancellable {
 			repository.updateTracks()
 			val details = getFullManga(manga)
-			val chapters = details.chapters ?: return@withLock
 			val track = repository.getTrackOrNull(manga) ?: return@withLock
+			val branch = checkNotNull(details.chapters?.findById(currentChapterId)).branch
+			val chapters = details.getChapters(branch)
 			val chapterIndex = chapters.indexOfFirst { x -> x.id == currentChapterId }
 			val lastNewChapterIndex = chapters.size - track.newChapters
 			val lastChapter = chapters.lastOrNull()
@@ -70,7 +74,7 @@ class CheckNewChaptersUseCase @Inject constructor(
 
 	private suspend fun invokeImpl(track: MangaTracking): MangaUpdates = runCatchingCancellable {
 		val details = getFullManga(track.manga)
-		compare(track, details, getBranch(details))
+		compare(track, details, getBranch(details, track.lastChapterId))
 	}.getOrElse { error ->
 		MangaUpdates.Failure(
 			manga = track.manga,
@@ -80,9 +84,17 @@ class CheckNewChaptersUseCase @Inject constructor(
 		repository.saveUpdates(updates)
 	}
 
-	private suspend fun getBranch(manga: Manga): String? {
+	private suspend fun getBranch(manga: Manga, trackChapterId: Long): String? {
-		val history = historyRepository.getOne(manga)
+		historyRepository.getOne(manga)?.let {
-		return manga.getPreferredBranch(history)
+			manga.chapters?.findById(it.chapterId)
+		}?.let {
+			return it.branch
+		}
+		manga.chapters?.findById(trackChapterId)?.let {
+			return it.branch
+		}
+		// fallback
+		return manga.getPreferredBranch(null)
 	}
 
 	private suspend fun getFullManga(manga: Manga): Manga = when {
@@ -111,25 +123,29 @@ class CheckNewChaptersUseCase @Inject constructor(
 	private fun compare(track: MangaTracking, manga: Manga, branch: String?): MangaUpdates.Success {
 		if (track.isEmpty()) {
 			// first check or manga was empty on last check
-			return MangaUpdates.Success(manga, emptyList(), isValid = false)
+			return MangaUpdates.Success(manga, branch, emptyList(), isValid = false)
 		}
 		val chapters = requireNotNull(manga.getChapters(branch))
+		if (BuildConfig.DEBUG && chapters.findById(track.lastChapterId) == null) {
+			Log.e("Tracker", "Chapter ${track.lastChapterId} not found")
+		}
 		val newChapters = chapters.takeLastWhile { x -> x.id != track.lastChapterId }
 		return when {
 			newChapters.isEmpty() -> {
 				MangaUpdates.Success(
 					manga = manga,
+					branch = branch,
 					newChapters = emptyList(),
 					isValid = chapters.lastOrNull()?.id == track.lastChapterId,
 				)
 			}
 
 			newChapters.size == chapters.size -> {
-				MangaUpdates.Success(manga, emptyList(), isValid = false)
+				MangaUpdates.Success(manga, branch, emptyList(), isValid = false)
 			}
 
 			else -> {
-				MangaUpdates.Success(manga, newChapters, isValid = true)
+				MangaUpdates.Success(manga, branch, newChapters, isValid = true)
 			}
 		}
 	}

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/TrackingRepository.kt

@@ -11,12 +11,12 @@ import org.koitharu.kotatsu.core.db.MangaDatabase
 import org.koitharu.kotatsu.core.db.entity.toManga
 import org.koitharu.kotatsu.core.db.entity.toMangaTags
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.core.util.ext.ifZero
 import org.koitharu.kotatsu.core.util.ext.mapItems
 import org.koitharu.kotatsu.core.util.ext.toInstantOrNull
 import org.koitharu.kotatsu.details.domain.ProgressUpdateUseCase
 import org.koitharu.kotatsu.list.domain.ListFilterOption
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.util.ifZero
 import org.koitharu.kotatsu.tracker.data.TrackEntity
 import org.koitharu.kotatsu.tracker.data.TrackLogEntity
 import org.koitharu.kotatsu.tracker.data.toTrackingLogItem
@@ -216,7 +216,6 @@ class TrackingRepository @Inject constructor(
 	}
 
 	private fun TrackEntity.mergeWith(updates: MangaUpdates): TrackEntity {
-		val chapters = updates.manga.chapters.orEmpty()
 		return when (updates) {
 			is MangaUpdates.Failure -> TrackEntity(
 				mangaId = mangaId,
@@ -230,7 +229,7 @@ class TrackingRepository @Inject constructor(
 
 			is MangaUpdates.Success -> TrackEntity(
 				mangaId = mangaId,
-				lastChapterId = chapters.lastOrNull()?.id ?: NO_ID,
+				lastChapterId = updates.manga.getChapters(updates.branch).lastOrNull()?.id ?: NO_ID,
 				newChapters = if (updates.isValid) newChapters + updates.newChapters.size else 0,
 				lastCheckTime = System.currentTimeMillis(),
 				lastChapterDate = updates.lastChapterDate().ifZero { lastChapterDate },

app/src/main/kotlin/org/koitharu/kotatsu/tracker/domain/model/MangaUpdates.kt

@@ -1,9 +1,9 @@
 package org.koitharu.kotatsu.tracker.domain.model
 
-import org.koitharu.kotatsu.core.util.ext.ifZero
 import org.koitharu.kotatsu.parsers.exception.TooManyRequestExceptions
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
+import org.koitharu.kotatsu.parsers.util.ifZero
 
 sealed interface MangaUpdates {
 
@@ -11,6 +11,7 @@ sealed interface MangaUpdates {
 
 	data class Success(
 		override val manga: Manga,
+		val branch: String?,
 		val newChapters: List<MangaChapter>,
 		val isValid: Boolean,
 	) : MangaUpdates {

app/src/main/kotlin/org/koitharu/kotatsu/tracker/ui/feed/model/FeedItem.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.Manga
 
 data class FeedItem(
 	val id: Long,
-	val imageUrl: String,
+	val imageUrl: String?,
 	val title: String,
 	val manga: Manga,
 	val count: Int,

app/src/main/kotlin/org/koitharu/kotatsu/widget/WidgetUpdater.kt

@@ -30,7 +30,7 @@ class WidgetUpdater @Inject constructor(
 	private fun updateWidgets(cls: Class<*>) {
 		val intent = Intent(context, cls)
 		intent.action = AppWidgetManager.ACTION_APPWIDGET_UPDATE
-		val ids = AppWidgetManager.getInstance(context)
+		val ids = (AppWidgetManager.getInstance(context) ?: return)
 			.getAppWidgetIds(ComponentName(context, cls))
 		intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids)
 		context.sendBroadcast(intent)

app/src/main/res/layout-w600dp-land/activity_details.xml

@@ -59,6 +59,7 @@
 					android:layout_marginStart="16dp"
 					android:layout_marginTop="16dp"
 					android:background="?colorSecondaryContainer"
+					android:clipToOutline="true"
 					android:foreground="?selectableItemBackground"
 					android:scaleType="centerCrop"
 					app:layout_constraintDimensionRatio="H,13:18"

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

@@ -52,6 +52,7 @@
 					android:layout_marginStart="16dp"
 					android:layout_marginTop="16dp"
 					android:background="?colorSecondaryContainer"
+					android:clipToOutline="true"
 					android:foreground="?selectableItemBackground"
 					android:scaleType="centerCrop"
 					app:layout_constraintDimensionRatio="H,13:18"

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

@@ -20,6 +20,7 @@
 			android:layout_marginStart="16dp"
 			android:layout_marginTop="16dp"
 			android:background="?colorSecondaryContainer"
+			android:clipToOutline="true"
 			android:foreground="?selectableItemBackground"
 			android:scaleType="centerCrop"
 			app:layout_constraintDimensionRatio="H,13:18"

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

@@ -25,6 +25,7 @@
 			android:layout_width="0dp"
 			android:layout_height="0dp"
 			android:layout_marginStart="16dp"
+			android:clipToOutline="true"
 			android:foreground="?selectableItemBackground"
 			android:scaleType="centerCrop"
 			app:layout_constraintDimensionRatio="H,13:18"

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

@@ -6,4 +6,5 @@
 	<bool name="com_samsung_android_icon_container_has_icon_container">true</bool>
 	<bool name="is_color_themes_available">false</bool>
 	<bool name="is_sync_enabled">true</bool>
+	<bool name="is_predictive_back_enabled">true</bool>
 </resources>

app/src/main/res/xml/pref_user_data.xml

@@ -46,7 +46,7 @@
 			android:summary="@string/restore_summary"
 			android:title="@string/restore_backup" />
 
-		<Preference
+		<PreferenceScreen
 			android:fragment="org.koitharu.kotatsu.settings.backup.PeriodicalBackupSettingsFragment"
 			android:key="backup_periodic"
 			android:persistent="false"

app/src/release/res/values/bools.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+	<!-- Disable predictive back due to crashes -->
+	<bool name="is_predictive_back_enabled">false</bool>
+</resources>

gradle/libs.versions.toml

@@ -28,10 +28,10 @@ leakcanary = "3.0-alpha-8"
 lifecycle = "2.8.7"
 markwon = "4.6.2"
 material = "1.12.0"
-moshi = "1.15.1"
+moshi = "1.15.2"
 okhttp = "4.12.0"
 okio = "3.9.1"
-parsers = "fece09b781"
+parsers = "794a737b6d"
 preference = "1.2.1"
 recyclerview = "1.3.2"
 room = "2.6.1"