Notification settings for pre-Oreo android

Думаю, так должно быть лучше.

.idea/codeStyles/Project.xml

@@ -23,6 +23,7 @@
       </option>
     </AndroidXmlCodeStyleSettings>
     <JetCodeStyleSettings>
+      <option name="ALLOW_TRAILING_COMMA" value="true" />
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
     <codeStyleSettings language="CMake">

.idea/compiler.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel>
+      <module name="Kotatsu.app" target="1.8" />
+    </bytecodeTargetLevel>
+  </component>
+</project>

.idea/gradle.xml

@@ -15,6 +15,7 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>

app/build.gradle

@@ -15,7 +15,7 @@ android {
 		minSdkVersion 21
 		targetSdkVersion 29
 		versionCode gitCommits
-		versionName '0.1.4'
+		versionName '0.2-b1'
 
 		buildConfigField 'String', 'GIT_BRANCH', "\"${gitBranch}\""
 
@@ -36,9 +36,6 @@ android {
 	buildTypes {
 		debug {
 			applicationIdSuffix = '.debug'
-			minifyEnabled true
-			shrinkResources true
-			proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
 		}
 		release {
 			minifyEnabled true
@@ -64,13 +61,15 @@ dependencies {
 	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3'
 	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.3'
 
-	implementation 'androidx.core:core-ktx:1.3.0-alpha02'
-	implementation 'androidx.fragment:fragment-ktx:1.2.3'
-	implementation 'androidx.appcompat:appcompat:1.2.0-alpha03'
+	implementation 'androidx.core:core-ktx:1.3.0-beta01'
+	implementation 'androidx.fragment:fragment-ktx:1.2.4'
+	implementation 'androidx.appcompat:appcompat:1.2.0-beta01'
 	implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta4'
 	implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0-beta01'
-	implementation 'androidx.recyclerview:recyclerview:1.2.0-alpha01'
+	implementation 'androidx.recyclerview:recyclerview:1.2.0-alpha02'
+	implementation 'androidx.viewpager2:viewpager2:1.1.0-alpha01'
 	implementation 'androidx.preference:preference:1.1.0'
+	implementation 'androidx.work:work-runtime-ktx:2.3.4'
 	implementation 'com.google.android.material:material:1.2.0-alpha05'
 
 	implementation 'androidx.room:room-runtime:2.2.5'
@@ -83,7 +82,7 @@ dependencies {
 	implementation 'com.github.moxy-community:moxy-ktx:2.1.2'
 	kapt 'com.github.moxy-community:moxy-compiler:2.1.2'
 
-	implementation 'com.squareup.okhttp3:okhttp:4.4.1'
+	implementation 'com.squareup.okhttp3:okhttp:4.5.0'
 	implementation 'com.squareup.okio:okio:2.5.0'
 	implementation 'org.jsoup:jsoup:1.13.1'
 

app/src/main/AndroidManifest.xml

@@ -8,7 +8,9 @@
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 	<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 	<uses-permission android:name="android.permission.WAKE_LOCK" />
+	<uses-permission android:name="android.permission.VIBRATE" />
 	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
 	<application
 		android:name="org.koitharu.kotatsu.KotatsuApp"
@@ -45,9 +47,12 @@
 		<activity
 			android:name=".ui.reader.SimpleSettingsActivity"
 			android:label="@string/settings" />
+		<activity android:name=".ui.browser.BrowserActivity" />
 		<activity
-			android:name=".ui.browser.BrowserActivity"
-			android:launchMode="singleInstance" />
+			android:name=".ui.utils.CrashActivity"
+			android:label="@string/error_occurred"
+			android:theme="@android:style/Theme.DeviceDefault.Dialog"
+			android:windowSoftInputMode="stateAlwaysHidden" />
 
 		<service
 			android:name=".ui.download.DownloadService"
@@ -58,7 +63,6 @@
 			android:name=".ui.search.MangaSuggestionsProvider"
 			android:authorities="${applicationId}.MangaSuggestionsProvider"
 			android:exported="false" />
-
 		<provider
 			android:name="androidx.core.content.FileProvider"
 			android:authorities="${applicationId}.files"

app/src/main/java/org/koitharu/kotatsu/KotatsuApp.kt

@@ -16,6 +16,7 @@ import org.koin.dsl.module
 import org.koitharu.kotatsu.core.db.MangaDatabase
 import org.koitharu.kotatsu.core.db.migrations.Migration1To2
 import org.koitharu.kotatsu.core.db.migrations.Migration2To3
+import org.koitharu.kotatsu.core.db.migrations.Migration3To4
 import org.koitharu.kotatsu.core.local.CbzFetcher
 import org.koitharu.kotatsu.core.local.PagesCache
 import org.koitharu.kotatsu.core.local.cookies.PersistentCookieJar
@@ -24,6 +25,7 @@ import org.koitharu.kotatsu.core.local.cookies.persistence.SharedPrefsCookiePers
 import org.koitharu.kotatsu.core.parser.UserAgentInterceptor
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.domain.MangaLoaderContext
+import org.koitharu.kotatsu.ui.utils.AppCrashHandler
 import org.koitharu.kotatsu.utils.CacheUtils
 import java.util.concurrent.TimeUnit
 
@@ -41,6 +43,7 @@ class KotatsuApp : Application() {
 		super.onCreate()
 		initKoin()
 		initCoil()
+		Thread.setDefaultUncaughtExceptionHandler(AppCrashHandler(applicationContext))
 		if (BuildConfig.DEBUG) {
 			initErrorHandler()
 		}
@@ -111,5 +114,5 @@ class KotatsuApp : Application() {
 		applicationContext,
 		MangaDatabase::class.java,
 		"kotatsu-db"
-	).addMigrations(Migration1To2, Migration2To3)
+	).addMigrations(Migration1To2, Migration2To3, Migration3To4)
 }

app/src/main/java/org/koitharu/kotatsu/core/db/FavouritesDao.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.core.db
 import androidx.room.*
 import org.koitharu.kotatsu.core.db.entity.FavouriteEntity
 import org.koitharu.kotatsu.core.db.entity.FavouriteManga
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
 
 @Dao
 abstract class FavouritesDao {
@@ -11,6 +12,9 @@ abstract class FavouritesDao {
 	@Query("SELECT * FROM favourites GROUP BY manga_id ORDER BY :orderBy LIMIT :limit OFFSET :offset")
 	abstract suspend fun findAll(offset: Int, limit: Int, orderBy: String): List<FavouriteManga>
 
+	@Query("SELECT * FROM manga WHERE manga_id IN (SELECT manga_id FROM favourites)")
+	abstract suspend fun findAllManga(): List<MangaEntity>
+
 	@Transaction
 	@Query("SELECT * FROM favourites WHERE manga_id = :id GROUP BY manga_id")
 	abstract suspend fun find(id: Long): FavouriteManga?

app/src/main/java/org/koitharu/kotatsu/core/db/HistoryDao.kt

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.core.db
 import androidx.room.*
 import org.koitharu.kotatsu.core.db.entity.HistoryEntity
 import org.koitharu.kotatsu.core.db.entity.HistoryWithManga
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
 
 
 @Dao
@@ -15,6 +16,9 @@ abstract class HistoryDao {
     @Query("SELECT * FROM history ORDER BY updated_at DESC LIMIT :limit OFFSET :offset")
     abstract suspend fun findAll(offset: Int, limit: Int): List<HistoryWithManga>
 
+    @Query("SELECT * FROM manga WHERE manga_id IN (SELECT manga_id FROM history)")
+    abstract suspend fun findAllManga(): List<MangaEntity>
+
     @Query("SELECT * FROM history WHERE manga_id = :id")
     abstract suspend fun find(id: Long): HistoryEntity?
 
@@ -33,10 +37,11 @@ abstract class HistoryDao {
     suspend fun update(entity: HistoryEntity) = update(entity.mangaId, entity.page, entity.chapterId, entity.scroll, entity.updatedAt)
 
     @Transaction
-    open suspend fun upsert(entity: HistoryEntity) {
-        if (update(entity) == 0) {
+    open suspend fun upsert(entity: HistoryEntity): Boolean {
+        return if (update(entity) == 0) {
             insert(entity)
-        }
+            true
+        } else false
     }
 
 }

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

@@ -7,20 +7,22 @@ import org.koitharu.kotatsu.core.db.entity.*
 @Database(
 	entities = [
 		MangaEntity::class, TagEntity::class, HistoryEntity::class, MangaTagsEntity::class,
-		FavouriteCategoryEntity::class, FavouriteEntity::class, MangaPrefsEntity::class
-	], version = 3
+		FavouriteCategoryEntity::class, FavouriteEntity::class, MangaPrefsEntity::class, TrackEntity::class
+	], version = 4
 )
 abstract class MangaDatabase : RoomDatabase() {
 
-	abstract fun historyDao(): HistoryDao
+	abstract val historyDao: HistoryDao
 
-	abstract fun tagsDao(): TagsDao
+	abstract val tagsDao: TagsDao
 
-	abstract fun mangaDao(): MangaDao
+	abstract val mangaDao: MangaDao
 
-	abstract fun favouritesDao(): FavouritesDao
+	abstract val favouritesDao: FavouritesDao
 
-	abstract fun preferencesDao(): PreferencesDao
+	abstract val preferencesDao: PreferencesDao
 
-	abstract fun favouriteCategoriesDao(): FavouriteCategoriesDao
+	abstract val favouriteCategoriesDao: FavouriteCategoriesDao
+
+	abstract val tracksDao: TracksDao
 }

app/src/main/java/org/koitharu/kotatsu/core/db/TracksDao.kt

@@ -0,0 +1,35 @@
+package org.koitharu.kotatsu.core.db
+
+import androidx.room.*
+import org.koitharu.kotatsu.core.db.entity.TrackEntity
+
+
+@Dao
+abstract class TracksDao {
+
+	@Query("SELECT * FROM tracks")
+	abstract suspend fun findAll(): List<TrackEntity>
+
+	@Query("SELECT * FROM tracks WHERE manga_id = :mangaId")
+	abstract suspend fun find(mangaId: Long): TrackEntity?
+
+	@Query("DELETE FROM tracks")
+	abstract suspend fun clear()
+
+	@Insert(onConflict = OnConflictStrategy.IGNORE)
+	abstract suspend fun insert(entity: TrackEntity): Long
+
+	@Update
+	abstract suspend fun update(entity: TrackEntity): Int
+
+	@Query("DELETE FROM tracks WHERE manga_id = :mangaId")
+	abstract suspend fun delete(mangaId: Long)
+
+	@Transaction
+	open suspend fun upsert(entity: TrackEntity) {
+		if (update(entity) == 0) {
+			insert(entity)
+		}
+	}
+
+}

app/src/main/java/org/koitharu/kotatsu/core/db/entity/TrackEntity.kt

@@ -0,0 +1,26 @@
+package org.koitharu.kotatsu.core.db.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.PrimaryKey
+
+@Entity(
+	tableName = "tracks", foreignKeys = [
+		ForeignKey(
+			entity = MangaEntity::class,
+			parentColumns = ["manga_id"],
+			childColumns = ["manga_id"],
+			onDelete = ForeignKey.CASCADE
+		)
+	]
+)
+data class TrackEntity (
+	@PrimaryKey(autoGenerate = false)
+	@ColumnInfo(name = "manga_id") val mangaId: Long,
+	@ColumnInfo(name = "chapters_total") val totalChapters: Int,
+	@ColumnInfo(name = "last_chapter_id") val lastChapterId: Long,
+	@ColumnInfo(name = "chapters_new") val newChapters: Int,
+	@ColumnInfo(name = "last_check") val lastCheck: Long,
+	@ColumnInfo(name = "last_notified_id") val lastNotifiedChapterId: Long
+)

app/src/main/java/org/koitharu/kotatsu/core/db/migrations/Migration3To4.kt

@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+object Migration3To4 : Migration(3, 4) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("CREATE TABLE IF NOT EXISTS tracks (manga_id INTEGER NOT NULL, chapters_total INTEGER NOT NULL, last_chapter_id INTEGER NOT NULL, chapters_new INTEGER NOT NULL, last_check INTEGER NOT NULL, last_notified_id INTEGER NOT NULL, PRIMARY KEY(manga_id), FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE )")
+	}
+}

app/src/main/java/org/koitharu/kotatsu/core/github/AppVersion.kt

@@ -10,10 +10,4 @@ data class AppVersion(
 	val url: String,
 	val apkSize: Long,
 	val apkUrl: String
-) : Parcelable {
-
-	fun isGreaterThen(version: String) {
-		val thisParts = name.substringBeforeLast('-').split('.')
-		val parts = version.substringBeforeLast('-').split('.')
-	}
-}
+) : Parcelable

app/src/main/java/org/koitharu/kotatsu/core/model/MangaTracking.kt

@@ -0,0 +1,14 @@
+package org.koitharu.kotatsu.core.model
+
+import android.os.Parcelable
+import kotlinx.android.parcel.Parcelize
+import java.util.*
+
+@Parcelize
+data class MangaTracking (
+	val manga: Manga,
+	val knownChaptersCount: Int,
+	val lastChapterId: Long,
+	val lastNotifiedChapterId: Long,
+	val lastCheck: Date?
+): Parcelable

app/src/main/java/org/koitharu/kotatsu/core/parser/site/GroupleRepository.kt

@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.core.model.*
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.utils.ext.*
 
-abstract class GroupleRepository :	RemoteMangaRepository() {
+abstract class GroupleRepository : RemoteMangaRepository() {
 
 	protected abstract val defaultDomain: String
 
@@ -20,7 +20,7 @@ abstract class GroupleRepository :	RemoteMangaRepository() {
 		offset: Int,
 		query: String?,
 		sortOrder: SortOrder?,
-		tag: MangaTag?
+		tag: MangaTag?,
 	): List<Manga> {
 		val domain = conf.getDomain(defaultDomain)
 		val doc = when {
@@ -28,7 +28,8 @@ abstract class GroupleRepository :	RemoteMangaRepository() {
 				"https://$domain/search",
 				mapOf("q" to query, "offset" to offset.toString())
 			)
-			tag == null -> loaderContext.httpGet("https://$domain/list?sortType=${getSortKey(sortOrder)}&offset=$offset")
+			tag == null -> loaderContext.httpGet("https://$domain/list?sortType=${getSortKey(
+				sortOrder)}&offset=$offset")
 			else -> loaderContext.httpGet(
 				"https://$domain/list/genre/${tag.key}?sortType=${getSortKey(
 					sortOrder
@@ -85,12 +86,22 @@ abstract class GroupleRepository :	RemoteMangaRepository() {
 	override suspend fun getDetails(manga: Manga): Manga {
 		val domain = conf.getDomain(defaultDomain)
 		val doc = loaderContext.httpGet(manga.url).parseHtml()
-		val root = doc.body().getElementById("mangaBox") ?: throw ParseException("Cannot find root")
+		val root = doc.body().getElementById("mangaBox")?.selectFirst("div.leftContent")
+			?: throw ParseException("Cannot find root")
 		return manga.copy(
 			description = root.selectFirst("div.manga-description")?.html(),
 			largeCoverUrl = root.selectFirst("div.subject-cower")?.selectFirst("img")?.attr(
 				"data-full"
 			),
+			tags = manga.tags + root.select("div.subject-meta").select("span.elem_genre ")
+				.mapNotNull {
+					val a = it.selectFirst("a.element-link") ?: return@mapNotNull null
+					MangaTag(
+						title = a.text(),
+						key = a.attr("href").substringAfterLast('/'),
+						source = source
+					)
+				},
 			chapters = root.selectFirst("div.chapters-link")?.selectFirst("table")
 				?.select("a")?.asReversed()?.mapIndexedNotNull { i, a ->
 					val href =

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

@@ -3,6 +3,7 @@ package org.koitharu.kotatsu.core.prefs
 import android.content.Context
 import android.content.SharedPreferences
 import android.content.res.Resources
+import android.provider.Settings
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.preference.PreferenceManager
 import org.koitharu.kotatsu.R
@@ -52,6 +53,26 @@ class AppSettings private constructor(resources: Resources, private val prefs: S
 		0L
 	)
 
+	val trackerNotifications by BoolPreferenceDelegate(
+		resources.getString(R.string.key_tracker_notifications),
+		true
+	)
+
+	var notificationSound by StringPreferenceDelegate(
+		resources.getString(R.string.key_notifications_sound),
+		Settings.System.DEFAULT_NOTIFICATION_URI.toString()
+	)
+
+	val notificationVibrate by BoolPreferenceDelegate(
+		resources.getString(R.string.key_notifications_vibrate),
+		false
+	)
+
+	val notificationLight by BoolPreferenceDelegate(
+		resources.getString(R.string.key_notifications_light),
+		true
+	)
+
 	private var sourcesOrderStr by NullableStringPreferenceDelegate(resources.getString(R.string.key_sources_order))
 
 	var sourcesOrder: List<Int>

app/src/main/java/org/koitharu/kotatsu/domain/MangaDataRepository.kt

@@ -17,9 +17,9 @@ class MangaDataRepository : KoinComponent {
 	suspend fun savePreferences(manga: Manga, mode: ReaderMode) {
 		val tags = manga.tags.map(TagEntity.Companion::fromMangaTag)
 		db.withTransaction {
-			db.tagsDao().upsert(tags)
-			db.mangaDao().upsert(MangaEntity.from(manga), tags)
-			db.preferencesDao().upsert(
+			db.tagsDao.upsert(tags)
+			db.mangaDao.upsert(MangaEntity.from(manga), tags)
+			db.preferencesDao.upsert(
 				MangaPrefsEntity(
 					mangaId = manga.id,
 					mode = mode.id
@@ -29,18 +29,18 @@ class MangaDataRepository : KoinComponent {
 	}
 
 	suspend fun getReaderMode(mangaId: Long): ReaderMode? {
-		return db.preferencesDao().find(mangaId)?.let { ReaderMode.valueOf(it.mode) }
+		return db.preferencesDao.find(mangaId)?.let { ReaderMode.valueOf(it.mode) }
 	}
 
 	suspend fun findMangaById(mangaId: Long): Manga? {
-		return db.mangaDao().find(mangaId)?.toManga()
+		return db.mangaDao.find(mangaId)?.toManga()
 	}
 
 	suspend fun storeManga(manga: Manga) {
 		val tags = manga.tags.map(TagEntity.Companion::fromMangaTag)
 		db.withTransaction {
-			db.tagsDao().upsert(tags)
-			db.mangaDao().upsert(MangaEntity.from(manga), tags)
+			db.tagsDao.upsert(tags)
+			db.mangaDao.upsert(MangaEntity.from(manga), tags)
 		}
 	}
 }

app/src/main/java/org/koitharu/kotatsu/domain/favourites/FavouritesRepository.kt

@@ -19,17 +19,17 @@ class FavouritesRepository : KoinComponent {
 	private val db: MangaDatabase by inject()
 
 	suspend fun getAllManga(offset: Int): List<Manga> {
-		val entities = db.favouritesDao().findAll(offset, 20, "created_at")
+		val entities = db.favouritesDao.findAll(offset, 20, "created_at")
 		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
 	}
 
 	suspend fun getAllCategories(): List<FavouriteCategory> {
-		val entities = db.favouriteCategoriesDao().findAll("created_at")
+		val entities = db.favouriteCategoriesDao.findAll("created_at")
 		return entities.map { it.toFavouriteCategory() }
 	}
 
 	suspend fun getCategories(mangaId: Long): List<FavouriteCategory> {
-		val entities = db.favouritesDao().find(mangaId)?.categories
+		val entities = db.favouritesDao.find(mangaId)?.categories
 		return entities?.map { it.toFavouriteCategory() }.orEmpty()
 	}
 
@@ -39,27 +39,27 @@ class FavouritesRepository : KoinComponent {
 			createdAt = System.currentTimeMillis(),
 			categoryId = 0
 		)
-		val id = db.favouriteCategoriesDao().insert(entity)
+		val id = db.favouriteCategoriesDao.insert(entity)
 		return entity.toFavouriteCategory(id)
 	}
 
 	suspend fun removeCategory(id: Long) {
-		db.favouriteCategoriesDao().delete(id)
+		db.favouriteCategoriesDao.delete(id)
 	}
 
 	suspend fun addToCategory(manga: Manga, categoryId: Long) {
 		val tags = manga.tags.map(TagEntity.Companion::fromMangaTag)
 		db.withTransaction {
-			db.tagsDao().upsert(tags)
-			db.mangaDao().upsert(MangaEntity.from(manga), tags)
+			db.tagsDao.upsert(tags)
+			db.mangaDao.upsert(MangaEntity.from(manga), tags)
 			val entity = FavouriteEntity(manga.id, categoryId, System.currentTimeMillis())
-			db.favouritesDao().add(entity)
+			db.favouritesDao.add(entity)
 		}
 		notifyFavouritesChanged(manga.id)
 	}
 
 	suspend fun removeFromCategory(manga: Manga, categoryId: Long) {
-		db.favouritesDao().delete(categoryId, manga.id)
+		db.favouritesDao.delete(categoryId, manga.id)
 		notifyFavouritesChanged(manga.id)
 	}
 

app/src/main/java/org/koitharu/kotatsu/domain/history/HistoryRepository.kt

@@ -11,6 +11,7 @@ import org.koitharu.kotatsu.core.db.entity.MangaEntity
 import org.koitharu.kotatsu.core.db.entity.TagEntity
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaHistory
+import org.koitharu.kotatsu.domain.tracking.TrackingRepository
 import java.util.*
 
 class HistoryRepository : KoinComponent {
@@ -18,31 +19,34 @@ class HistoryRepository : KoinComponent {
 	private val db: MangaDatabase by inject()
 
 	suspend fun getList(offset: Int, limit: Int = 20): List<Manga> {
-		val entities = db.historyDao().findAll(offset, limit)
+		val entities = db.historyDao.findAll(offset, limit)
 		return entities.map { it.manga.toManga(it.tags.map(TagEntity::toMangaTag).toSet()) }
 	}
 
 	suspend fun addOrUpdate(manga: Manga, chapterId: Long, page: Int, scroll: Float) {
 		val tags = manga.tags.map(TagEntity.Companion::fromMangaTag)
 		db.withTransaction {
-			db.tagsDao().upsert(tags)
-			db.mangaDao().upsert(MangaEntity.from(manga), tags)
-			db.historyDao().upsert(
-				HistoryEntity(
-					mangaId = manga.id,
-					createdAt = System.currentTimeMillis(),
-					updatedAt = System.currentTimeMillis(),
-					chapterId = chapterId,
-					page = page,
-					scroll = scroll
+			db.tagsDao.upsert(tags)
+			db.mangaDao.upsert(MangaEntity.from(manga), tags)
+			if (db.historyDao.upsert(
+					HistoryEntity(
+						mangaId = manga.id,
+						createdAt = System.currentTimeMillis(),
+						updatedAt = System.currentTimeMillis(),
+						chapterId = chapterId,
+						page = page,
+						scroll = scroll
+					)
 				)
-			)
+			) {
+				TrackingRepository().insertOrNothing(manga)
+			}
 		}
 		notifyHistoryChanged()
 	}
 
 	suspend fun getOne(manga: Manga): MangaHistory? {
-		return db.historyDao().find(manga.id)?.let {
+		return db.historyDao.find(manga.id)?.let {
 			MangaHistory(
 				createdAt = Date(it.createdAt),
 				updatedAt = Date(it.updatedAt),
@@ -54,12 +58,12 @@ class HistoryRepository : KoinComponent {
 	}
 
 	suspend fun clear() {
-		db.historyDao().clear()
+		db.historyDao.clear()
 		notifyHistoryChanged()
 	}
 
 	suspend fun delete(manga: Manga) {
-		db.historyDao().delete(manga.id)
+		db.historyDao.delete(manga.id)
 		notifyHistoryChanged()
 	}
 
@@ -68,8 +72,8 @@ class HistoryRepository : KoinComponent {
 	 * Useful for replacing saved manga on deleting it with remove source
 	 */
 	suspend fun deleteOrSwap(manga: Manga, alternative: Manga?) {
-		if (alternative == null || db.mangaDao().update(MangaEntity.from(alternative)) <= 0) {
-			db.historyDao().delete(manga.id)
+		if (alternative == null || db.mangaDao.update(MangaEntity.from(alternative)) <= 0) {
+			db.historyDao.delete(manga.id)
 			notifyHistoryChanged()
 		}
 	}

app/src/main/java/org/koitharu/kotatsu/domain/local/MangaZip.kt

@@ -5,7 +5,7 @@ import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.model.MangaChapter
 import org.koitharu.kotatsu.utils.ext.sub
 import org.koitharu.kotatsu.utils.ext.takeIfReadable
-import org.koitharu.kotatsu.utils.ext.toFileName
+import org.koitharu.kotatsu.utils.ext.toFileNameSafe
 import java.io.File
 import java.util.zip.ZipEntry
 import java.util.zip.ZipInputStream
@@ -91,7 +91,7 @@ class MangaZip(val file: File) {
 		const val INDEX_ENTRY = "index.json"
 
 		fun findInDir(root: File, manga: Manga): MangaZip {
-			val name = manga.title.toFileName() + ".cbz"
+			val name = manga.title.toFileNameSafe() + ".cbz"
 			val file = File(root, name)
 			return MangaZip(file)
 		}

app/src/main/java/org/koitharu/kotatsu/domain/tracking/TrackingRepository.kt

@@ -0,0 +1,67 @@
+package org.koitharu.kotatsu.domain.tracking
+
+import org.koin.core.KoinComponent
+import org.koin.core.inject
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.db.entity.TrackEntity
+import org.koitharu.kotatsu.core.model.Manga
+import org.koitharu.kotatsu.core.model.MangaTracking
+import java.util.*
+
+class TrackingRepository : KoinComponent {
+
+	private val db: MangaDatabase by inject()
+
+	suspend fun getNewChaptersCount(mangaId: Long): Int {
+		val entity = db.tracksDao.find(mangaId) ?: return 0
+		return entity.newChapters
+	}
+
+	suspend fun getAllTracks(): List<MangaTracking> {
+		val favourites = db.favouritesDao.findAllManga()
+		val history = db.historyDao.findAllManga()
+		val manga = (favourites + history).distinctBy { it.id }
+		val tracks = db.tracksDao.findAll().groupBy { it.mangaId }
+		return manga.map { m ->
+			val track = tracks[m.id]?.singleOrNull()
+			MangaTracking(
+				manga = m.toManga(),
+				knownChaptersCount = track?.totalChapters ?: -1,
+				lastChapterId = track?.lastChapterId ?: 0L,
+				lastNotifiedChapterId = track?.lastNotifiedChapterId ?: 0L,
+				lastCheck = track?.lastCheck?.takeUnless { it == 0L }?.let(::Date)
+			)
+		}
+	}
+
+	suspend fun storeTrackResult(
+		mangaId: Long,
+		knownChaptersCount: Int,
+		lastChapterId: Long,
+		newChapters: Int,
+		lastNotifiedChapterId: Long
+	) {
+		val entity = TrackEntity(
+			mangaId = mangaId,
+			newChapters = newChapters,
+			lastCheck = System.currentTimeMillis(),
+			lastChapterId = lastChapterId,
+			totalChapters = knownChaptersCount,
+			lastNotifiedChapterId = lastNotifiedChapterId
+		)
+		db.tracksDao.upsert(entity)
+	}
+
+	suspend fun insertOrNothing(manga: Manga) {
+		val chapters = manga.chapters ?: return
+		val entity = TrackEntity(
+			mangaId = manga.id,
+			totalChapters = chapters.size,
+			lastChapterId = chapters.lastOrNull()?.id ?: 0L,
+			newChapters = 0,
+			lastCheck = System.currentTimeMillis(),
+			lastNotifiedChapterId = 0L
+		)
+		db.tracksDao.insert(entity)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/common/BaseActivity.kt

@@ -11,7 +11,6 @@ import moxy.MvpAppCompatActivity
 import org.koin.core.KoinComponent
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.ui.common.dialog.StorageSelectDialog
 
 abstract class BaseActivity : MvpAppCompatActivity(), KoinComponent {
 
@@ -70,7 +69,7 @@ abstract class BaseActivity : MvpAppCompatActivity(), KoinComponent {
 			return true
 		}
 		if (BuildConfig.DEBUG && keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
-			StorageSelectDialog.Builder(this).create().show()
+			throw StackOverflowError("test")
 			return true
 		}
 		return super.onKeyDown(keyCode, event)

app/src/main/java/org/koitharu/kotatsu/ui/common/BasePreferenceFragment.kt

@@ -3,12 +3,11 @@ package org.koitharu.kotatsu.ui.common
 import androidx.annotation.StringRes
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
-import org.koin.core.KoinComponent
-import org.koin.core.inject
+import org.koin.android.ext.android.inject
 import org.koitharu.kotatsu.core.prefs.AppSettings
 
 abstract class BasePreferenceFragment(@StringRes private val titleId: Int) :
-	PreferenceFragmentCompat(), KoinComponent {
+	PreferenceFragmentCompat() {
 
 	protected val settings by inject<AppSettings>()
 

app/src/main/java/org/koitharu/kotatsu/ui/common/BaseService.kt

@@ -7,10 +7,9 @@ import androidx.annotation.CallSuper
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
-import org.koin.core.KoinComponent
 import kotlin.coroutines.CoroutineContext
 
-abstract class BaseService : Service(), KoinComponent, CoroutineScope {
+abstract class BaseService : Service(), CoroutineScope {
 
 	private val job = SupervisorJob()
 

app/src/main/java/org/koitharu/kotatsu/ui/common/list/BaseRecyclerAdapter.kt

@@ -80,6 +80,10 @@ abstract class BaseRecyclerAdapter<T, E>(private val onItemClickListener: OnRecy
 		onDataSetChanged()
 	}
 
+	override fun onViewRecycled(holder: BaseViewHolder<T, E>) {
+		holder.onRecycled()
+	}
+
 	final override fun getItemCount() = dataSet.size
 
 	final override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder<T, E> {

app/src/main/java/org/koitharu/kotatsu/ui/common/list/BaseViewHolder.kt

@@ -40,5 +40,7 @@ abstract class BaseViewHolder<T, E> protected constructor(view: View) :
 		return this
 	}
 
+	open fun onRecycled() = Unit
+
 	abstract fun onBind(data: T, extra: E)
 }

app/src/main/java/org/koitharu/kotatsu/ui/details/ChaptersAdapter.kt

@@ -16,6 +16,13 @@ class ChaptersAdapter(onItemClickListener: OnRecyclerItemClickListener<MangaChap
 			updateCurrentPosition()
 		}
 
+	var newChaptersCount: Int = 0
+		set(value) {
+			val updated = maxOf(field, value)
+			field = value
+			notifyItemRangeChanged(itemCount - updated, updated)
+		}
+
 	var currentChapterPosition = RecyclerView.NO_POSITION
 		private set
 
@@ -24,9 +31,13 @@ class ChaptersAdapter(onItemClickListener: OnRecyclerItemClickListener<MangaChap
 	override fun onGetItemId(item: MangaChapter) = item.id
 
 	override fun getExtra(item: MangaChapter, position: Int): ChapterExtra = when {
-		currentChapterPosition == RecyclerView.NO_POSITION -> ChapterExtra.UNREAD
+		currentChapterPosition == RecyclerView.NO_POSITION
+				|| currentChapterPosition < position -> if (position >= itemCount - newChaptersCount) {
+			ChapterExtra.NEW
+		} else {
+			ChapterExtra.UNREAD
+		}
 		currentChapterPosition == position -> ChapterExtra.CURRENT
-		currentChapterPosition < position -> ChapterExtra.UNREAD
 		currentChapterPosition > position -> ChapterExtra.READ
 		else -> ChapterExtra.UNREAD
 	}

app/src/main/java/org/koitharu/kotatsu/ui/details/ChaptersFragment.kt

@@ -4,6 +4,7 @@ import android.os.Bundle
 import android.view.View
 import androidx.core.view.isVisible
 import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import kotlinx.android.synthetic.main.fragment_chapters.*
 import moxy.ktx.moxyPresenter
@@ -44,6 +45,7 @@ class ChaptersFragment : BaseFragment(R.layout.fragment_chapters), MangaDetailsV
 	override fun onMangaUpdated(manga: Manga) {
 		this.manga = manga
 		adapter.replaceData(manga.chapters.orEmpty())
+		scrollToCurrent()
 	}
 
 	override fun onLoadingStateChanged(isLoading: Boolean) {
@@ -56,6 +58,11 @@ class ChaptersFragment : BaseFragment(R.layout.fragment_chapters), MangaDetailsV
 
 	override fun onHistoryChanged(history: MangaHistory?) {
 		adapter.currentChapterId = history?.chapterId
+		scrollToCurrent()
+	}
+
+	override fun onNewChaptersChanged(newChapters: Int) {
+		adapter.newChaptersCount = newChapters
 	}
 
 	override fun onFavouriteChanged(categories: List<FavouriteCategory>) = Unit
@@ -86,4 +93,13 @@ class ChaptersFragment : BaseFragment(R.layout.fragment_chapters), MangaDetailsV
 		}
 		return true
 	}
+
+	private fun scrollToCurrent() {
+		val pos = (recyclerView_chapters.adapter as? ChaptersAdapter)?.currentChapterPosition
+			?: RecyclerView.NO_POSITION
+		if (pos != RecyclerView.NO_POSITION) {
+			(recyclerView_chapters.layoutManager as? LinearLayoutManager)
+				?.scrollToPositionWithOffset(pos, 100)
+		}
+	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/details/MangaDetailsActivity.kt

@@ -25,10 +25,9 @@ import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.ui.browser.BrowserActivity
 import org.koitharu.kotatsu.ui.common.BaseActivity
 import org.koitharu.kotatsu.ui.download.DownloadService
+import org.koitharu.kotatsu.utils.MangaShortcut
 import org.koitharu.kotatsu.utils.ShareHelper
-import org.koitharu.kotatsu.utils.ShortcutUtils
 import org.koitharu.kotatsu.utils.ext.getDisplayMessage
-import org.koitharu.kotatsu.utils.ext.showDialog
 
 class MangaDetailsActivity : BaseActivity(), MangaDetailsView {
 
@@ -80,6 +79,17 @@ class MangaDetailsActivity : BaseActivity(), MangaDetailsView {
 		}
 	}
 
+	override fun onNewChaptersChanged(newChapters: Int) {
+		val tab = tabs.getTabAt(1) ?: return
+		if (newChapters == 0) {
+			tab.removeBadge()
+		} else {
+			val badge = tab.orCreateBadge
+			badge.number = newChapters
+			badge.isVisible = true
+		}
+	}
+
 	override fun onCreateOptionsMenu(menu: Menu?): Boolean {
 		menuInflater.inflate(R.menu.opt_details, menu)
 		return super.onCreateOptionsMenu(menu)
@@ -108,14 +118,14 @@ class MangaDetailsActivity : BaseActivity(), MangaDetailsView {
 		}
 		R.id.action_delete -> {
 			manga?.let { m ->
-				showDialog {
-					setTitle(R.string.delete_manga)
-					setMessage(getString(R.string.text_delete_local_manga, m.title))
-					setPositiveButton(R.string.delete) { _, _ ->
+				AlertDialog.Builder(this)
+					.setTitle(R.string.delete_manga)
+					.setMessage(getString(R.string.text_delete_local_manga, m.title))
+					.setPositiveButton(R.string.delete) { _, _ ->
 						presenter.deleteLocal(m)
 					}
-					setNegativeButton(android.R.string.cancel, null)
-				}
+					.setNegativeButton(android.R.string.cancel, null)
+					.show()
 			}
 			true
 		}
@@ -145,7 +155,7 @@ class MangaDetailsActivity : BaseActivity(), MangaDetailsView {
 		R.id.action_shortcut -> {
 			manga?.let {
 				lifecycleScope.launch {
-					if (!ShortcutUtils.requestPinShortcut(this@MangaDetailsActivity, manga)) {
+					if (!MangaShortcut(it).requestPinShortcut(this@MangaDetailsActivity)) {
 						Snackbar.make(
 							pager,
 							R.string.operation_not_supported,

app/src/main/java/org/koitharu/kotatsu/ui/details/MangaDetailsFragment.kt

@@ -17,10 +17,13 @@ import org.koitharu.kotatsu.ui.main.list.favourites.categories.FavouriteCategori
 import org.koitharu.kotatsu.ui.reader.ReaderActivity
 import org.koitharu.kotatsu.ui.search.MangaSearchSheet
 import org.koitharu.kotatsu.utils.ext.addChips
+import org.koitharu.kotatsu.utils.ext.showPopupMenu
 import org.koitharu.kotatsu.utils.ext.textAndVisible
 import kotlin.math.roundToInt
 
-class MangaDetailsFragment : BaseFragment(R.layout.fragment_details), MangaDetailsView, View.OnClickListener {
+class MangaDetailsFragment : BaseFragment(R.layout.fragment_details), MangaDetailsView,
+	View.OnClickListener,
+	View.OnLongClickListener {
 
 	@Suppress("unused")
 	private val presenter by moxyPresenter(factory = MangaDetailsPresenter.Companion::getInstance)
@@ -64,9 +67,9 @@ class MangaDetailsFragment : BaseFragment(R.layout.fragment_details), MangaDetai
 				onClickListener = this@MangaDetailsFragment
 			)
 		}
-		imageView_favourite.setOnClickListener {
-			FavouriteCategoriesDialog.show(childFragmentManager, manga)
-		}
+		imageView_favourite.setOnClickListener(this)
+		button_read.setOnClickListener(this)
+		button_read.setOnLongClickListener(this)
 		updateReadButton()
 	}
 
@@ -93,12 +96,55 @@ class MangaDetailsFragment : BaseFragment(R.layout.fragment_details), MangaDetai
 
 	override fun onMangaRemoved(manga: Manga) = Unit //handled in activity
 
+	override fun onNewChaptersChanged(newChapters: Int) = Unit
+
 	override fun onClick(v: View) {
-		if (v is Chip) {
-			when(val tag = v.tag) {
-				is String -> MangaSearchSheet.show(activity?.supportFragmentManager ?: childFragmentManager,
-					manga?.source ?: return, tag)
+		when {
+			v.id == R.id.imageView_favourite -> {
+				FavouriteCategoriesDialog.show(childFragmentManager, manga ?: return)
 			}
+			v.id == R.id.button_read -> {
+				startActivity(
+					ReaderActivity.newIntent(
+						context ?: return,
+						manga ?: return,
+						history
+					)
+				)
+			}
+			v is Chip -> {
+				when (val tag = v.tag) {
+					is String -> MangaSearchSheet.show(activity?.supportFragmentManager
+						?: childFragmentManager,
+						manga?.source ?: return, tag)
+				}
+			}
+		}
+	}
+
+	override fun onLongClick(v: View): Boolean {
+		when {
+			v.id == R.id.button_read -> {
+				if (history == null) {
+					return false
+				}
+				v.showPopupMenu(R.menu.popup_read) {
+					when (it.itemId) {
+						R.id.action_read -> {
+							startActivity(
+								ReaderActivity.newIntent(
+									context ?: return@showPopupMenu false,
+									manga ?: return@showPopupMenu false
+								)
+							)
+							true
+						}
+						else -> false
+					}
+				}
+				return true
+			}
+			else -> return false
 		}
 	}
 
@@ -114,15 +160,6 @@ class MangaDetailsFragment : BaseFragment(R.layout.fragment_details), MangaDetai
 				button_read.setText(R.string._continue)
 				button_read.setIconResource(R.drawable.ic_play)
 			}
-			button_read.setOnClickListener {
-				startActivity(
-					ReaderActivity.newIntent(
-						context ?: return@setOnClickListener,
-						manga ?: return@setOnClickListener,
-						history
-					)
-				)
-			}
 		}
 	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/details/MangaDetailsPresenter.kt

@@ -17,6 +17,7 @@ import org.koitharu.kotatsu.domain.favourites.FavouritesRepository
 import org.koitharu.kotatsu.domain.favourites.OnFavouritesChangeListener
 import org.koitharu.kotatsu.domain.history.HistoryRepository
 import org.koitharu.kotatsu.domain.history.OnHistoryChangeListener
+import org.koitharu.kotatsu.domain.tracking.TrackingRepository
 import org.koitharu.kotatsu.ui.common.BasePresenter
 import org.koitharu.kotatsu.utils.ext.safe
 import java.io.IOException
@@ -28,12 +29,14 @@ class MangaDetailsPresenter private constructor() : BasePresenter<MangaDetailsVi
 
 	private lateinit var historyRepository: HistoryRepository
 	private lateinit var favouritesRepository: FavouritesRepository
+	private lateinit var trackingRepository: TrackingRepository
 
 	private var manga: Manga? = null
 
 	override fun onFirstViewAttach() {
 		historyRepository = HistoryRepository()
 		favouritesRepository = FavouritesRepository()
+		trackingRepository = TrackingRepository()
 		super.onFirstViewAttach()
 		HistoryRepository.subscribe(this)
 		FavouritesRepository.subscribe(this)
@@ -75,6 +78,7 @@ class MangaDetailsPresenter private constructor() : BasePresenter<MangaDetailsVi
 				}
 				viewState.onMangaUpdated(data)
 				this@MangaDetailsPresenter.manga = data
+				viewState.onNewChaptersChanged(trackingRepository.getNewChaptersCount(manga.id))
 			} catch (_: CancellationException){
 			} catch (e: Throwable) {
 				if (BuildConfig.DEBUG) {

app/src/main/java/org/koitharu/kotatsu/ui/details/MangaDetailsView.kt

@@ -1,8 +1,6 @@
 package org.koitharu.kotatsu.ui.details
 
-import moxy.MvpView
 import moxy.viewstate.strategy.alias.AddToEndSingle
-import moxy.viewstate.strategy.alias.OneExecution
 import moxy.viewstate.strategy.alias.SingleState
 import org.koitharu.kotatsu.core.model.FavouriteCategory
 import org.koitharu.kotatsu.core.model.Manga
@@ -22,4 +20,7 @@ interface MangaDetailsView : BaseMvpView {
 
 	@SingleState
 	fun onMangaRemoved(manga: Manga)
+
+	@AddToEndSingle
+	fun onNewChaptersChanged(newChapters: Int)
 }

app/src/main/java/org/koitharu/kotatsu/ui/download/DownloadNotification.kt

@@ -5,10 +5,11 @@ import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
-import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import android.os.Build
 import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
+import androidx.core.graphics.drawable.toBitmap
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.ui.details.MangaDetailsActivity
@@ -31,9 +32,13 @@ class DownloadNotification(private val context: Context) {
 				NotificationManager.IMPORTANCE_LOW
 			)
 			channel.enableVibration(false)
+			channel.enableLights(false)
+			channel.setSound(null, null)
 			manager.createNotificationChannel(channel)
 		}
 		builder.setOnlyAlertOnce(true)
+		builder.setDefaults(0)
+		builder.color = ContextCompat.getColor(context, R.color.blue_primary)
 	}
 
 	fun fillFrom(manga: Manga) {
@@ -70,10 +75,11 @@ class DownloadNotification(private val context: Context) {
 		builder.setContentText(e.getDisplayMessage(context.resources))
 		builder.setAutoCancel(true)
 		builder.setContentIntent(null)
+		builder.setCategory(NotificationCompat.CATEGORY_ERROR)
 	}
 
 	fun setLargeIcon(icon: Drawable?) {
-		builder.setLargeIcon((icon as? BitmapDrawable)?.bitmap)
+		builder.setLargeIcon(icon?.toBitmap())
 	}
 
 	fun setProgress(chaptersTotal: Int, pagesTotal: Int, chapter: Int, page: Int) {
@@ -83,6 +89,7 @@ class DownloadNotification(private val context: Context) {
 		val percent = (progress / max.toFloat() * 100).roundToInt()
 		builder.setProgress(max, progress, false)
 		builder.setContentText("%d%%".format(percent))
+		builder.setCategory(NotificationCompat.CATEGORY_PROGRESS)
 	}
 
 	fun setPostProcessing() {
@@ -96,6 +103,7 @@ class DownloadNotification(private val context: Context) {
 		builder.setContentIntent(createIntent(context, manga))
 		builder.setAutoCancel(true)
 		builder.setSmallIcon(android.R.drawable.stat_sys_download_done)
+		builder.setCategory(null)
 	}
 
 	fun setCancelling() {

app/src/main/java/org/koitharu/kotatsu/ui/download/DownloadService.kt

@@ -4,7 +4,6 @@ import android.content.Context
 import android.content.Intent
 import android.net.ConnectivityManager
 import android.os.PowerManager
-import android.os.WorkSource
 import android.webkit.MimeTypeMap
 import android.widget.Toast
 import androidx.core.content.ContextCompat
@@ -14,7 +13,7 @@ import kotlinx.coroutines.*
 import kotlinx.coroutines.sync.Mutex
 import okhttp3.OkHttpClient
 import okhttp3.Request
-import org.koin.core.inject
+import org.koin.android.ext.android.inject
 import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.local.PagesCache

app/src/main/java/org/koitharu/kotatsu/ui/main/MainActivity.kt

@@ -30,6 +30,7 @@ import org.koitharu.kotatsu.ui.reader.ReaderActivity
 import org.koitharu.kotatsu.ui.reader.ReaderState
 import org.koitharu.kotatsu.ui.settings.AppUpdateService
 import org.koitharu.kotatsu.ui.settings.SettingsActivity
+import org.koitharu.kotatsu.ui.tracker.TrackWorker
 import org.koitharu.kotatsu.utils.ext.getDisplayMessage
 import org.koitharu.kotatsu.utils.ext.resolveDp
 
@@ -69,6 +70,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
 		drawer.postDelayed(2000) {
 			AppUpdateService.startIfRequired(applicationContext)
 		}
+		TrackWorker.setup(applicationContext)
 	}
 
 	override fun onDestroy() {

app/src/main/java/org/koitharu/kotatsu/ui/main/list/MangaGridHolder.kt

@@ -1,8 +1,8 @@
 package org.koitharu.kotatsu.ui.main.list
 
 import android.view.ViewGroup
+import coil.api.clear
 import coil.api.load
-import coil.request.RequestDisposable
 import kotlinx.android.synthetic.main.item_manga_grid.*
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.Manga
@@ -11,15 +11,17 @@ import org.koitharu.kotatsu.ui.common.list.BaseViewHolder
 
 class MangaGridHolder(parent: ViewGroup) : BaseViewHolder<Manga, MangaHistory?>(parent, R.layout.item_manga_grid) {
 
-	private var coverRequest: RequestDisposable? = null
-
 	override fun onBind(data: Manga, extra: MangaHistory?) {
-		coverRequest?.dispose()
+		imageView_cover.clear()
 		textView_title.text = data.title
-		coverRequest = imageView_cover.load(data.coverUrl) {
+		imageView_cover.load(data.coverUrl) {
 			placeholder(R.drawable.ic_placeholder)
 			fallback(R.drawable.ic_placeholder)
 			error(R.drawable.ic_placeholder)
 		}
 	}
+
+	override fun onRecycled() {
+		imageView_cover.clear()
+	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/main/list/MangaListDetailsHolder.kt

@@ -3,8 +3,8 @@ package org.koitharu.kotatsu.ui.main.list
 import android.annotation.SuppressLint
 import android.view.ViewGroup
 import androidx.core.view.isVisible
+import coil.api.clear
 import coil.api.load
-import coil.request.RequestDisposable
 import kotlinx.android.synthetic.main.item_manga_list_details.*
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.Manga
@@ -15,14 +15,12 @@ import kotlin.math.roundToInt
 
 class MangaListDetailsHolder(parent: ViewGroup) : BaseViewHolder<Manga, MangaHistory?>(parent, R.layout.item_manga_list_details) {
 
-	private var coverRequest: RequestDisposable? = null
-
 	@SuppressLint("SetTextI18n")
 	override fun onBind(data: Manga, extra: MangaHistory?) {
-		coverRequest?.dispose()
+		imageView_cover.clear()
 		textView_title.text = data.title
 		textView_subtitle.textAndVisible = data.altTitle
-		coverRequest = imageView_cover.load(data.coverUrl) {
+		imageView_cover.load(data.coverUrl) {
 			placeholder(R.drawable.ic_placeholder)
 			fallback(R.drawable.ic_placeholder)
 			error(R.drawable.ic_placeholder)
@@ -37,4 +35,8 @@ class MangaListDetailsHolder(parent: ViewGroup) : BaseViewHolder<Manga, MangaHis
 			it.title
 		}
 	}
+
+	override fun onRecycled() {
+		imageView_cover.clear()
+	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/main/list/MangaListFragment.kt

@@ -13,6 +13,7 @@ import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.fragment_list.*
 import moxy.MvpDelegate
@@ -39,7 +40,7 @@ import org.koitharu.kotatsu.utils.ext.*
 abstract class MangaListFragment<E> : BaseFragment(R.layout.fragment_list), MangaListView<E>,
 	PaginationScrollListener.Callback, OnRecyclerItemClickListener<Manga>,
 	SharedPreferences.OnSharedPreferenceChangeListener, OnFilterChangedListener,
-	SectionItemDecoration.Callback {
+	SectionItemDecoration.Callback, SwipeRefreshLayout.OnRefreshListener {
 
 	private val settings by inject<AppSettings>()
 
@@ -58,9 +59,7 @@ abstract class MangaListFragment<E> : BaseFragment(R.layout.fragment_list), Mang
 		initListMode(settings.listMode)
 		recyclerView.adapter = adapter
 		recyclerView.addOnScrollListener(PaginationScrollListener(4, this))
-		swipeRefreshLayout.setOnRefreshListener {
-			onRequestMoreItems(0)
-		}
+		swipeRefreshLayout.setOnRefreshListener(this)
 		recyclerView_filter.setHasFixedSize(true)
 		recyclerView_filter.addItemDecoration(ItemTypeDividerDecoration(view.context))
 		recyclerView_filter.addItemDecoration(SectionItemDecoration(false, this))
@@ -122,6 +121,10 @@ abstract class MangaListFragment<E> : BaseFragment(R.layout.fragment_list), Mang
 		}
 	}
 
+	final override fun onRefresh() {
+		onRequestMoreItems(0)
+	}
+
 	override fun onListChanged(list: List<Manga>) {
 		adapter?.replaceData(list)
 		if (list.isEmpty()) {
@@ -171,6 +174,7 @@ abstract class MangaListFragment<E> : BaseFragment(R.layout.fragment_list), Mang
 		Snackbar.make(recyclerView, e.getDisplayMessage(resources), Snackbar.LENGTH_SHORT).show()
 	}
 
+	@CallSuper
 	override fun onLoadingStateChanged(isLoading: Boolean) {
 		val hasItems = recyclerView.hasItems
 		progressBar.isVisible = isLoading && !hasItems
@@ -181,6 +185,7 @@ abstract class MangaListFragment<E> : BaseFragment(R.layout.fragment_list), Mang
 		}
 	}
 
+	@CallSuper
 	override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
 		if (context == null) {
 			return
@@ -249,13 +254,13 @@ abstract class MangaListFragment<E> : BaseFragment(R.layout.fragment_list), Mang
 		recyclerView.firstItem = position
 	}
 
-	override fun isSection(position: Int): Boolean {
+	final override fun isSection(position: Int): Boolean {
 		return position == 0 || recyclerView_filter.adapter?.run {
 			getItemViewType(position) != getItemViewType(position - 1)
 		} ?: false
 	}
 
-	override fun getSectionTitle(position: Int): CharSequence? {
+	final override fun getSectionTitle(position: Int): CharSequence? {
 		return when (recyclerView_filter.adapter?.getItemViewType(position)) {
 			FilterAdapter.VIEW_TYPE_SORT -> getString(R.string.sort_order)
 			FilterAdapter.VIEW_TYPE_TAG -> getString(R.string.genre)

app/src/main/java/org/koitharu/kotatsu/ui/main/list/MangaListHolder.kt

@@ -1,8 +1,8 @@
 package org.koitharu.kotatsu.ui.main.list
 
 import android.view.ViewGroup
+import coil.api.clear
 import coil.api.load
-import coil.request.RequestDisposable
 import kotlinx.android.synthetic.main.item_manga_list.*
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.Manga
@@ -13,16 +13,18 @@ import org.koitharu.kotatsu.utils.ext.textAndVisible
 class MangaListHolder(parent: ViewGroup) :
 	BaseViewHolder<Manga, MangaHistory?>(parent, R.layout.item_manga_list) {
 
-	private var coverRequest: RequestDisposable? = null
-
 	override fun onBind(data: Manga, extra: MangaHistory?) {
-		coverRequest?.dispose()
+		imageView_cover.clear()
 		textView_title.text = data.title
 		textView_subtitle.textAndVisible = data.tags.joinToString(", ") { it.title }
-		coverRequest = imageView_cover.load(data.coverUrl) {
+		imageView_cover.load(data.coverUrl) {
 			placeholder(R.drawable.ic_placeholder)
 			fallback(R.drawable.ic_placeholder)
 			error(R.drawable.ic_placeholder)
 		}
 	}
+
+	override fun onRecycled() {
+		imageView_cover.clear()
+	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/main/list/history/HistoryListFragment.kt

@@ -1,14 +1,9 @@
 package org.koitharu.kotatsu.ui.main.list.history
 
-import android.content.res.ColorStateList
-import android.graphics.Color
-import android.os.Bundle
 import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
-import android.view.View
 import androidx.appcompat.app.AlertDialog
-import androidx.core.view.isVisible
 import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.fragment_list.*
 import moxy.ktx.moxyPresenter

app/src/main/java/org/koitharu/kotatsu/ui/main/list/history/HistoryListPresenter.kt

@@ -14,7 +14,7 @@ import org.koitharu.kotatsu.core.model.MangaHistory
 import org.koitharu.kotatsu.domain.history.HistoryRepository
 import org.koitharu.kotatsu.ui.common.BasePresenter
 import org.koitharu.kotatsu.ui.main.list.MangaListView
-import org.koitharu.kotatsu.utils.ShortcutUtils
+import org.koitharu.kotatsu.utils.MangaShortcut
 
 @InjectViewState
 class HistoryListPresenter : BasePresenter<MangaListView<MangaHistory>>() {
@@ -62,7 +62,7 @@ class HistoryListPresenter : BasePresenter<MangaListView<MangaHistory>>() {
 					repository.clear()
 				}
 				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) {
-					ShortcutUtils.clearAppShortcuts(get())
+					MangaShortcut.clearAppShortcuts(get())
 				}
 				viewState.onListChanged(emptyList())
 			} catch (_: CancellationException) {
@@ -84,7 +84,7 @@ class HistoryListPresenter : BasePresenter<MangaListView<MangaHistory>>() {
 					repository.delete(manga)
 				}
 				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) {
-					ShortcutUtils.removeAppShortcut(get(), manga)
+					MangaShortcut(manga).removeAppShortcut(get())
 				}
 				viewState.onItemRemoved(manga)
 			} catch (_: CancellationException) {

app/src/main/java/org/koitharu/kotatsu/ui/main/list/local/LocalListFragment.kt

@@ -6,6 +6,7 @@ import android.content.Intent
 import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
+import androidx.appcompat.app.AlertDialog
 import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.fragment_list.*
 import moxy.ktx.moxyPresenter
@@ -14,7 +15,6 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.ui.main.list.MangaListFragment
 import org.koitharu.kotatsu.utils.ext.ellipsize
-import org.koitharu.kotatsu.utils.ext.showDialog
 import java.io.File
 
 class LocalListFragment : MangaListFragment<File>() {
@@ -81,14 +81,14 @@ class LocalListFragment : MangaListFragment<File>() {
 	override fun onPopupMenuItemSelected(item: MenuItem, data: Manga): Boolean {
 		return when (item.itemId) {
 			R.id.action_delete -> {
-				context?.showDialog {
-					setTitle(R.string.delete_manga)
-					setMessage(getString(R.string.text_delete_local_manga, data.title))
-					setPositiveButton(R.string.delete) { _, _ ->
+				AlertDialog.Builder(context ?: return false)
+					.setTitle(R.string.delete_manga)
+					.setMessage(getString(R.string.text_delete_local_manga, data.title))
+					.setPositiveButton(R.string.delete) { _, _ ->
 						presenter.delete(data)
 					}
-					setNegativeButton(android.R.string.cancel, null)
-				}
+					.setNegativeButton(android.R.string.cancel, null)
+					.show()
 				true
 			}
 			else -> super.onPopupMenuItemSelected(item, data)

app/src/main/java/org/koitharu/kotatsu/ui/main/list/local/LocalListPresenter.kt

@@ -19,8 +19,8 @@ import org.koitharu.kotatsu.domain.MangaProviderFactory
 import org.koitharu.kotatsu.domain.history.HistoryRepository
 import org.koitharu.kotatsu.ui.common.BasePresenter
 import org.koitharu.kotatsu.ui.main.list.MangaListView
+import org.koitharu.kotatsu.utils.MangaShortcut
 import org.koitharu.kotatsu.utils.MediaStoreCompat
-import org.koitharu.kotatsu.utils.ShortcutUtils
 import org.koitharu.kotatsu.utils.ext.safe
 import org.koitharu.kotatsu.utils.ext.sub
 import java.io.File
@@ -98,7 +98,7 @@ class LocalListPresenter : BasePresenter<MangaListView<File>>() {
 					}
 				}
 				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) {
-					ShortcutUtils.removeAppShortcut(get(), manga)
+					MangaShortcut(manga).removeAppShortcut(get())
 				}
 				viewState.onItemRemoved(manga)
 			} catch (e: CancellationException) {

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

@@ -9,6 +9,7 @@ import android.os.Build
 import android.os.Bundle
 import android.view.*
 import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
 import androidx.core.view.isVisible
 import androidx.core.view.postDelayed
 import androidx.core.view.updatePadding
@@ -34,8 +35,8 @@ import org.koitharu.kotatsu.ui.reader.thumbnails.OnPageSelectListener
 import org.koitharu.kotatsu.ui.reader.thumbnails.PagesThumbnailsSheet
 import org.koitharu.kotatsu.ui.reader.wetoon.WebtoonReaderFragment
 import org.koitharu.kotatsu.utils.GridTouchHelper
+import org.koitharu.kotatsu.utils.MangaShortcut
 import org.koitharu.kotatsu.utils.ShareHelper
-import org.koitharu.kotatsu.utils.ShortcutUtils
 import org.koitharu.kotatsu.utils.anim.Motion
 import org.koitharu.kotatsu.utils.ext.*
 
@@ -91,7 +92,7 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) {
 				GlobalScope.launch {
 					safe {
-						ShortcutUtils.addAppShortcut(applicationContext, state.manga)
+						MangaShortcut(state.manga).addAppShortcut(applicationContext)
 					}
 				}
 			}
@@ -207,16 +208,16 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 	}
 
 	override fun onError(e: Throwable) {
-		showDialog {
-			setTitle(R.string.error_occurred)
-			setMessage(e.message)
-			setPositiveButton(R.string.close, null)
-			if (reader?.hasItems != true) {
-				setOnDismissListener {
-					finish()
-				}
+		val dialog = AlertDialog.Builder(this)
+			.setTitle(R.string.error_occurred)
+			.setMessage(e.message)
+			.setPositiveButton(R.string.close, null)
+		if (reader?.hasItems != true) {
+			dialog.setOnDismissListener {
+				finish()
 			}
 		}
+		dialog.show()
 	}
 
 	override fun onGridTouch(area: Int) {
@@ -225,11 +226,13 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 				setUiIsVisible(!appbar_top.isVisible)
 			}
 			GridTouchHelper.AREA_TOP,
-			GridTouchHelper.AREA_LEFT -> if (isTapSwitchEnabled) {
+			GridTouchHelper.AREA_LEFT,
+			-> if (isTapSwitchEnabled) {
 				reader?.switchPageBy(-1)
 			}
 			GridTouchHelper.AREA_BOTTOM,
-			GridTouchHelper.AREA_RIGHT -> if (isTapSwitchEnabled) {
+			GridTouchHelper.AREA_RIGHT,
+			-> if (isTapSwitchEnabled) {
 				reader?.switchPageBy(1)
 			}
 		}
@@ -267,13 +270,15 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView, ChaptersDialog.OnCh
 		KeyEvent.KEYCODE_SPACE,
 		KeyEvent.KEYCODE_PAGE_DOWN,
 		KeyEvent.KEYCODE_DPAD_DOWN,
-		KeyEvent.KEYCODE_DPAD_RIGHT -> {
+		KeyEvent.KEYCODE_DPAD_RIGHT,
+		-> {
 			reader?.switchPageBy(1)
 			true
 		}
 		KeyEvent.KEYCODE_PAGE_UP,
 		KeyEvent.KEYCODE_DPAD_UP,
-		KeyEvent.KEYCODE_DPAD_LEFT -> {
+		KeyEvent.KEYCODE_DPAD_LEFT,
+		-> {
 			reader?.switchPageBy(-1)
 			true
 		}

app/src/main/java/org/koitharu/kotatsu/ui/reader/standard/PageHolder.kt

@@ -30,6 +30,11 @@ class PageHolder(parent: ViewGroup, private val loader: PageLoader) :
 		doLoad(data, force = false)
 	}
 
+	override fun onRecycled() {
+		job?.cancel()
+		ssiv.recycle()
+	}
+
 	private fun doLoad(data: MangaPage, force: Boolean) {
 		job?.cancel()
 		job = launch {

app/src/main/java/org/koitharu/kotatsu/ui/reader/thumbnails/PageThumbnailHolder.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.ui.reader.thumbnails
 
 import android.view.ViewGroup
+import androidx.core.net.toUri
 import coil.Coil
 import coil.api.get
 import coil.size.PixelSize
@@ -8,20 +9,18 @@ import coil.size.Size
 import kotlinx.android.synthetic.main.item_page_thumb.*
 import kotlinx.coroutines.*
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.local.PagesCache
 import org.koitharu.kotatsu.core.model.MangaPage
 import org.koitharu.kotatsu.domain.MangaProviderFactory
 import org.koitharu.kotatsu.ui.common.list.BaseViewHolder
 
 class PageThumbnailHolder(parent: ViewGroup, private val scope: CoroutineScope) :
-	BaseViewHolder<MangaPage, Unit>(parent, R.layout.item_page_thumb) {
+	BaseViewHolder<MangaPage, PagesCache>(parent, R.layout.item_page_thumb) {
 
 	private var job: Job? = null
 	private	val thumbSize: Size
 
 	init {
-//		FIXME
-//		val color = DrawUtils.invertColor(textView_number.currentTextColor)
-//		textView_number.setShadowLayer(parent.resources.resolveDp(26f), 0f, 0f, color)
 		val width = itemView.context.resources.getDimensionPixelSize(R.dimen.preferred_grid_width)
 		thumbSize = PixelSize(
 			width = width,
@@ -29,14 +28,15 @@ class PageThumbnailHolder(parent: ViewGroup, private val scope: CoroutineScope)
 		)
 	}
 
-	override fun onBind(data: MangaPage, extra: Unit) {
+	override fun onBind(data: MangaPage, extra: PagesCache) {
 		imageView_thumb.setImageDrawable(null)
-		textView_number.text = (adapterPosition + 1).toString()
+		textView_number.text = (bindingAdapterPosition + 1).toString()
 		job?.cancel()
 		job = scope.launch(Dispatchers.IO) {
 			try {
 				val url = data.preview ?: data.url.let {
-					MangaProviderFactory.create(data.source).getPageFullUrl(data)
+					val pageUrl = MangaProviderFactory.create(data.source).getPageFullUrl(data)
+					extra[pageUrl]?.toUri()?.toString() ?: pageUrl
 				}
 				val drawable = Coil.get(url) {
 					size(thumbSize)
@@ -50,4 +50,9 @@ class PageThumbnailHolder(parent: ViewGroup, private val scope: CoroutineScope)
 			}
 		}
 	}
+
+	override fun onRecycled() {
+		job?.cancel()
+		imageView_thumb.setImageDrawable(null)
+	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/reader/thumbnails/PagesThumbnailsAdapter.kt

@@ -5,15 +5,18 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.DisposableHandle
 import kotlinx.coroutines.SupervisorJob
+import org.koin.core.inject
+import org.koitharu.kotatsu.core.local.PagesCache
 import org.koitharu.kotatsu.core.model.MangaPage
 import org.koitharu.kotatsu.ui.common.list.BaseRecyclerAdapter
 import org.koitharu.kotatsu.ui.common.list.OnRecyclerItemClickListener
 import kotlin.coroutines.CoroutineContext
 
 class PagesThumbnailsAdapter(onItemClickListener: OnRecyclerItemClickListener<MangaPage>?) :
-    BaseRecyclerAdapter<MangaPage, Unit>(onItemClickListener), CoroutineScope, DisposableHandle {
+    BaseRecyclerAdapter<MangaPage, PagesCache>(onItemClickListener), CoroutineScope, DisposableHandle {
 
     private val job = SupervisorJob()
+    private val cache by inject<PagesCache>()
 
     override val coroutineContext: CoroutineContext
         get() = Dispatchers.Main + job
@@ -22,7 +25,7 @@ class PagesThumbnailsAdapter(onItemClickListener: OnRecyclerItemClickListener<Ma
         job.cancel()
     }
 
-    override fun getExtra(item: MangaPage, position: Int) = Unit
+    override fun getExtra(item: MangaPage, position: Int) = cache
 
     override fun onCreateViewHolder(parent: ViewGroup) = PageThumbnailHolder(parent, this)
 

app/src/main/java/org/koitharu/kotatsu/ui/reader/wetoon/WebtoonHolder.kt

@@ -6,7 +6,7 @@ import androidx.core.net.toUri
 import androidx.core.view.isVisible
 import com.davemorrissey.labs.subscaleview.ImageSource
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
-import kotlinx.android.synthetic.main.item_page.*
+import kotlinx.android.synthetic.main.item_page_webtoon.*
 import kotlinx.coroutines.*
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.MangaPage
@@ -53,6 +53,11 @@ class WebtoonHolder(parent: ViewGroup, private val loader: PageLoader) :
 		}
 	}
 
+	override fun onRecycled() {
+		job?.cancel()
+		ssiv.recycle()
+	}
+
 	fun getScrollY() = ssiv.center?.y ?: 0f
 
 	fun restoreScroll(scroll: Float) {

app/src/main/java/org/koitharu/kotatsu/ui/reader/wetoon/WebtoonReaderFragment.kt

@@ -3,7 +3,6 @@ package org.koitharu.kotatsu.ui.reader.wetoon
 import android.os.Bundle
 import android.view.View
 import android.view.animation.AccelerateDecelerateInterpolator
-import androidx.recyclerview.widget.LinearLayoutManager
 import kotlinx.android.synthetic.main.fragment_reader_webtoon.*
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.model.MangaPage
@@ -12,7 +11,7 @@ import org.koitharu.kotatsu.ui.reader.base.AbstractReader
 import org.koitharu.kotatsu.ui.reader.base.BaseReaderAdapter
 import org.koitharu.kotatsu.ui.reader.base.GroupedList
 import org.koitharu.kotatsu.utils.ext.doOnCurrentItemChanged
-import org.koitharu.kotatsu.utils.ext.findMiddleVisibleItemPosition
+import org.koitharu.kotatsu.utils.ext.findCenterViewPosition
 import org.koitharu.kotatsu.utils.ext.firstItem
 import org.koitharu.kotatsu.utils.ext.withArgs
 
@@ -43,7 +42,7 @@ class WebtoonReaderFragment : AbstractReader(R.layout.fragment_reader_webtoon) {
 		get() = adapter?.itemCount ?: 0
 
 	override fun getCurrentItem(): Int {
-		return (recyclerView.layoutManager as LinearLayoutManager).findMiddleVisibleItemPosition()
+		return recyclerView.findCenterViewPosition()
 	}
 
 	override fun setCurrentItem(position: Int, isSmooth: Boolean) {

app/src/main/java/org/koitharu/kotatsu/ui/settings/AppUpdateService.kt

@@ -9,6 +9,7 @@ import android.graphics.BitmapFactory
 import android.net.Uri
 import android.os.Build
 import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -80,8 +81,18 @@ class AppUpdateService : BaseService() {
 				PendingIntent.FLAG_CANCEL_CURRENT
 			)
 		)
+		builder.addAction(
+			R.drawable.ic_download, getString(R.string.download),
+			PendingIntent.getActivity(
+				this,
+				NOTIFICATION_ID + 1,
+				Intent(Intent.ACTION_VIEW, Uri.parse(newVersion.apkUrl)),
+				PendingIntent.FLAG_CANCEL_CURRENT
+			)
+		)
 		builder.setSmallIcon(R.drawable.ic_stat_update)
 		builder.setAutoCancel(true)
+		builder.setColor(ContextCompat.getColor(this, R.color.blue_primary_dark))
 		builder.setLargeIcon(BitmapFactory.decodeResource(resources, R.mipmap.ic_launcher))
 		manager.notify(NOTIFICATION_ID, builder.build())
 	}
@@ -92,8 +103,12 @@ class AppUpdateService : BaseService() {
 		private const val CHANNEL_ID = "update"
 		private val PERIOD = TimeUnit.HOURS.toMillis(6)
 
-		fun start(context: Context) =
-			context.startService(Intent(context, AppUpdateService::class.java))
+		fun start(context: Context) {
+			try {
+				context.startService(Intent(context, AppUpdateService::class.java))
+			} catch (_: IllegalStateException) {
+			}
+		}
 
 		fun startIfRequired(context: Context) {
 			val settings = AppSettings(context)

app/src/main/java/org/koitharu/kotatsu/ui/settings/MainSettingsFragment.kt

@@ -1,7 +1,10 @@
 package org.koitharu.kotatsu.ui.settings
 
+import android.content.Intent
 import android.content.SharedPreferences
+import android.os.Build
 import android.os.Bundle
+import android.provider.Settings
 import android.view.View
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.collection.arrayMapOf
@@ -15,6 +18,8 @@ import org.koitharu.kotatsu.core.prefs.ListMode
 import org.koitharu.kotatsu.ui.common.BasePreferenceFragment
 import org.koitharu.kotatsu.ui.main.list.ListModeSelectDialog
 import org.koitharu.kotatsu.ui.settings.utils.MultiSummaryProvider
+import org.koitharu.kotatsu.ui.tracker.TrackWorker
+
 
 class MainSettingsFragment : BasePreferenceFragment(R.string.settings),
 	SharedPreferences.OnSharedPreferenceChangeListener {
@@ -32,12 +37,6 @@ class MainSettingsFragment : BasePreferenceFragment(R.string.settings),
 		}
 		findPreference<MultiSelectListPreference>(R.string.key_reader_switchers)?.summaryProvider =
 			MultiSummaryProvider(R.string.gestures_only)
-		findPreference<PreferenceScreen>(R.string.key_remote_sources)?.run {
-			val total = MangaSource.values().size - 1
-			summary = getString(
-				R.string.enabled_d_from_d, total - settings.hiddenSources.size, total
-			)
-		}
 	}
 
 	override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
@@ -60,12 +59,33 @@ class MainSettingsFragment : BasePreferenceFragment(R.string.settings),
 		super.onDestroyView()
 	}
 
+	override fun onResume() {
+		super.onResume()
+		findPreference<PreferenceScreen>(R.string.key_remote_sources)?.run {
+			val total = MangaSource.values().size - 1
+			summary = getString(
+				R.string.enabled_d_from_d, total - settings.hiddenSources.size, total
+			)
+		}
+	}
+
 	override fun onPreferenceTreeClick(preference: Preference?): Boolean {
 		return when (preference?.key) {
 			getString(R.string.key_list_mode) -> {
 				ListModeSelectDialog.show(childFragmentManager)
 				true
 			}
+			getString(R.string.key_notifications_settings) -> {
+				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+					val intent = Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
+						.putExtra(Settings.EXTRA_APP_PACKAGE, requireContext().packageName)
+						.putExtra(Settings.EXTRA_CHANNEL_ID, TrackWorker.CHANNEL_ID)
+					startActivity(intent)
+				} else {
+					(activity as? SettingsActivity)?.openNotificationSettingsLegacy()
+				}
+				true
+			}
 			else -> super.onPreferenceTreeClick(preference)
 		}
 	}

app/src/main/java/org/koitharu/kotatsu/ui/settings/NotificationSettingsLegacyFragment.kt

@@ -0,0 +1,66 @@
+package org.koitharu.kotatsu.ui.settings
+
+import android.app.Activity
+import android.content.Intent
+import android.media.RingtoneManager
+import android.net.Uri
+import android.os.Bundle
+import android.provider.Settings
+import androidx.preference.Preference
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.ui.common.BasePreferenceFragment
+import org.koitharu.kotatsu.utils.ext.toUriOrNull
+
+class NotificationSettingsLegacyFragment : BasePreferenceFragment(R.string.notifications) {
+
+	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+		addPreferencesFromResource(R.xml.pref_notifications)
+		findPreference<Preference>(R.string.key_notifications_sound)?.run {
+			val uri = settings.notificationSound.toUriOrNull()
+			summary = RingtoneManager.getRingtone(context, uri).getTitle(context)
+		}
+	}
+
+	override fun onPreferenceTreeClick(preference: Preference?): Boolean {
+		return when (preference?.key) {
+			getString(R.string.key_notifications_sound) -> {
+				val intent = Intent(RingtoneManager.ACTION_RINGTONE_PICKER)
+				intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE,
+					RingtoneManager.TYPE_NOTIFICATION)
+				intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true)
+				intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, true)
+				intent.putExtra(RingtoneManager.EXTRA_RINGTONE_DEFAULT_URI,
+					Settings.System.DEFAULT_NOTIFICATION_URI)
+				intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, preference.title)
+				val existingValue = settings.notificationSound.toUriOrNull()
+				intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, existingValue)
+				startActivityForResult(intent, REQUEST_RINGTONE)
+				true
+			}
+			else -> super.onPreferenceTreeClick(preference)
+		}
+	}
+
+	override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+		when (requestCode) {
+			REQUEST_RINGTONE -> {
+				if (resultCode == Activity.RESULT_OK) {
+					val uri =
+						data?.getParcelableExtra<Uri>(RingtoneManager.EXTRA_RINGTONE_PICKED_URI)
+					settings.notificationSound = uri?.toString().orEmpty()
+					findPreference<Preference>(R.string.key_notifications_sound)?.run {
+						summary = RingtoneManager.getRingtone(context, uri).getTitle(context)
+					}
+				}
+			}
+			else -> {
+				super.onActivityResult(requestCode, resultCode, data)
+			}
+		}
+	}
+
+	private companion object {
+
+		const val REQUEST_RINGTONE = 340
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/settings/SettingsActivity.kt

@@ -3,6 +3,9 @@ package org.koitharu.kotatsu.ui.settings
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import android.transition.Slide
+import android.view.Gravity
+import androidx.fragment.app.Fragment
 import androidx.fragment.app.commit
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
@@ -20,7 +23,9 @@ class SettingsActivity : BaseActivity(),
 
 		if (supportFragmentManager.findFragmentById(R.id.container) == null) {
 			supportFragmentManager.commit {
-				replace(R.id.container, MainSettingsFragment())
+				replace(R.id.container, MainSettingsFragment().also {
+					it.exitTransition = Slide(Gravity.START)
+				})
 			}
 		}
 	}
@@ -30,16 +35,23 @@ class SettingsActivity : BaseActivity(),
 		val fragment = fm.fragmentFactory.instantiate(classLoader, pref.fragment)
 		fragment.arguments = pref.extras
 		fragment.setTargetFragment(caller, 0)
-		fm.commit {
-			replace(R.id.container, fragment)
-			addToBackStack(null)
-		}
+		openFragment(fragment)
 		return true
 	}
 
 	fun openMangaSourceSettings(mangaSource: MangaSource) {
+		openFragment(SourceSettingsFragment.newInstance(mangaSource))
+	}
+
+	fun openNotificationSettingsLegacy() {
+		openFragment(NotificationSettingsLegacyFragment())
+	}
+
+	private fun openFragment(fragment: Fragment) {
+		fragment.enterTransition = Slide(Gravity.END)
+		fragment.exitTransition = Slide(Gravity.START)
 		supportFragmentManager.commit {
-			replace(R.id.container, SourceSettingsFragment.newInstance(mangaSource))
+			replace(R.id.container, fragment)
 			addToBackStack(null)
 		}
 	}

app/src/main/java/org/koitharu/kotatsu/ui/tracker/TrackWorker.kt

@@ -0,0 +1,210 @@
+package org.koitharu.kotatsu.ui.tracker
+
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Context
+import android.os.Build
+import androidx.annotation.RequiresApi
+import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
+import androidx.core.graphics.drawable.toBitmap
+import androidx.work.*
+import coil.Coil
+import coil.api.get
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.koin.core.KoinComponent
+import org.koin.core.inject
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.model.Manga
+import org.koitharu.kotatsu.core.model.MangaChapter
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.domain.MangaProviderFactory
+import org.koitharu.kotatsu.domain.tracking.TrackingRepository
+import org.koitharu.kotatsu.ui.details.MangaDetailsActivity
+import org.koitharu.kotatsu.utils.ext.safe
+import org.koitharu.kotatsu.utils.ext.toUriOrNull
+import java.util.concurrent.TimeUnit
+
+class TrackWorker(context: Context, workerParams: WorkerParameters) :
+	CoroutineWorker(context, workerParams), KoinComponent {
+
+	private val notificationManager by lazy(LazyThreadSafetyMode.NONE) {
+		applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+	}
+
+	private val settings by inject<AppSettings>()
+
+	override suspend fun doWork(): Result = withContext(Dispatchers.IO) {
+		val repo = TrackingRepository()
+		val tracks = repo.getAllTracks()
+		if (tracks.isEmpty()) {
+			return@withContext Result.success()
+		}
+		var success = 0
+		for (track in tracks) {
+			val details = safe {
+				MangaProviderFactory.create(track.manga.source)
+					.getDetails(track.manga)
+			}
+			val chapters = details?.chapters ?: continue
+			when {
+				track.knownChaptersCount == -1 -> { //first check
+					repo.storeTrackResult(
+						mangaId = track.manga.id,
+						knownChaptersCount = chapters.size,
+						lastChapterId = chapters.lastOrNull()?.id ?: 0L,
+						lastNotifiedChapterId = 0L,
+						newChapters = 0
+					)
+				}
+				track.knownChaptersCount == 0 && track.lastChapterId == 0L -> { //manga was empty on last check
+					repo.storeTrackResult(
+						mangaId = track.manga.id,
+						knownChaptersCount = track.knownChaptersCount,
+						lastChapterId = 0L,
+						lastNotifiedChapterId = chapters.lastOrNull()?.id ?: 0L,
+						newChapters = chapters.size
+					)
+					showNotification(track.manga, chapters)
+				}
+				chapters.size == track.knownChaptersCount -> {
+					if (chapters.lastOrNull()?.id == track.lastChapterId) {
+						// manga was not updated. skip
+					} else {
+						// number of chapters still the same, bu last chapter changed.
+						// maybe some chapters are removed. we need to find last known chapter
+						val knownChapter = chapters.indexOfLast { it.id == track.lastChapterId }
+						if (knownChapter == -1) {
+							// confuse. reset anything
+							repo.storeTrackResult(
+								mangaId = track.manga.id,
+								knownChaptersCount = chapters.size,
+								lastChapterId = chapters.lastOrNull()?.id ?: 0L,
+								lastNotifiedChapterId = chapters.lastOrNull()?.id ?: 0L,
+								newChapters = 0
+							)
+						} else {
+							val newChapters = chapters.size - knownChapter + 1
+							repo.storeTrackResult(
+								mangaId = track.manga.id,
+								knownChaptersCount = knownChapter + 1,
+								lastChapterId = track.lastChapterId,
+								lastNotifiedChapterId = chapters.lastOrNull()?.id ?: 0L,
+								newChapters = newChapters
+							)
+							if (chapters.lastOrNull()?.id != track.lastNotifiedChapterId) {
+								showNotification(track.manga, chapters.takeLast(newChapters))
+							}
+						}
+					}
+				}
+				else -> {
+					val newChapters = chapters.size - track.knownChaptersCount
+					repo.storeTrackResult(
+						mangaId = track.manga.id,
+						knownChaptersCount = track.knownChaptersCount,
+						lastChapterId = track.lastChapterId,
+						lastNotifiedChapterId = chapters.lastOrNull()?.id ?: 0L,
+						newChapters = newChapters
+					)
+					if (chapters.lastOrNull()?.id != track.lastNotifiedChapterId) {
+						showNotification(track.manga, chapters.takeLast(newChapters))
+					}
+				}
+			}
+			success++
+		}
+		if (success == 0) {
+			Result.retry()
+		} else {
+			Result.success()
+		}
+	}
+
+	private suspend fun showNotification(manga: Manga, newChapters: List<MangaChapter>) {
+		if (newChapters.isEmpty() || !settings.trackerNotifications) {
+			return
+		}
+		val id = manga.url.hashCode()
+		val colorPrimary = ContextCompat.getColor(applicationContext, R.color.blue_primary)
+		val builder = NotificationCompat.Builder(applicationContext, CHANNEL_ID)
+		val summary = applicationContext.resources.getQuantityString(R.plurals.new_chapters,
+			newChapters.size, newChapters.size)
+		with(builder) {
+			setContentText(summary)
+			setContentText(manga.title)
+			setNumber(newChapters.size)
+			setLargeIcon(safe {
+				Coil.loader().get(manga.coverUrl).toBitmap()
+			})
+			setSmallIcon(R.drawable.ic_stat_book_plus)
+			val style = NotificationCompat.InboxStyle(this)
+			for (chapter in newChapters) {
+				style.addLine(chapter.name)
+			}
+			style.setSummaryText(manga.title)
+			style.setBigContentTitle(summary)
+			setStyle(style)
+			val intent = MangaDetailsActivity.newIntent(applicationContext, manga)
+			setContentIntent(PendingIntent.getActivity(applicationContext, id,
+				intent, PendingIntent.FLAG_UPDATE_CURRENT))
+			setAutoCancel(true)
+			color = colorPrimary
+			priority = NotificationCompat.PRIORITY_DEFAULT
+			if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+				builder.setSound(settings.notificationSound.toUriOrNull())
+				var defaults = if (settings.notificationLight) {
+					setLights(colorPrimary, 1000, 5000)
+					NotificationCompat.DEFAULT_LIGHTS
+				} else 0
+				if (settings.notificationVibrate) {
+					builder.setVibrate(longArrayOf(500, 500, 500, 500))
+					defaults = defaults or NotificationCompat.DEFAULT_VIBRATE
+				}
+				builder.setDefaults(defaults)
+			}
+		}
+		withContext(Dispatchers.Main) {
+			notificationManager.notify(TAG, id, builder.build())
+		}
+	}
+
+	companion object {
+
+		const val CHANNEL_ID = "tracking"
+		private const val TAG = "tracking"
+
+		@RequiresApi(Build.VERSION_CODES.O)
+		private fun createNotificationChannel(context: Context) {
+			val manager =
+				context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+			if (manager.getNotificationChannel(CHANNEL_ID) == null) {
+				val channel = NotificationChannel(CHANNEL_ID,
+					context.getString(R.string.new_chapters),
+					NotificationManager.IMPORTANCE_DEFAULT)
+				channel.setShowBadge(true)
+				channel.lightColor = ContextCompat.getColor(context, R.color.blue_primary)
+				channel.enableLights(true)
+				manager.createNotificationChannel(channel)
+			}
+		}
+
+		fun setup(context: Context) {
+			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+				createNotificationChannel(context)
+			}
+			val constraints = Constraints.Builder()
+				.setRequiredNetworkType(NetworkType.CONNECTED)
+				.build()
+			val request = PeriodicWorkRequestBuilder<TrackWorker>(4, TimeUnit.HOURS)
+				.setConstraints(constraints)
+				.addTag(TAG)
+				.setBackoffCriteria(BackoffPolicy.LINEAR, 30, TimeUnit.MINUTES)
+				.build()
+			WorkManager.getInstance(context)
+				.enqueueUniquePeriodicWork(TAG, ExistingPeriodicWorkPolicy.KEEP, request)
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/utils/AppCrashHandler.kt

@@ -0,0 +1,27 @@
+package org.koitharu.kotatsu.ui.utils
+
+import android.content.Context
+import android.content.Intent
+import java.io.PrintWriter
+import java.io.StringWriter
+import kotlin.system.exitProcess
+
+class AppCrashHandler(private val applicationContext: Context) : Thread.UncaughtExceptionHandler {
+
+	override fun uncaughtException(t: Thread, e: Throwable) {
+		val crashInfo = buildString {
+			val writer = StringWriter()
+			e.printStackTrace(PrintWriter(writer))
+			append(writer.toString().trimIndent())
+		}
+		val intent = Intent(applicationContext, CrashActivity::class.java)
+		intent.putExtra(Intent.EXTRA_TEXT, crashInfo)
+		intent.flags = (Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK)
+		try {
+			applicationContext.startActivity(intent)
+		} catch (e: Throwable) {
+			e.printStackTrace()
+		}
+		exitProcess(1)
+	}
+}

app/src/main/java/org/koitharu/kotatsu/ui/utils/CrashActivity.kt

@@ -0,0 +1,34 @@
+package org.koitharu.kotatsu.ui.utils
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.view.View
+import kotlinx.android.synthetic.main.activity_crash.*
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.ui.main.MainActivity
+
+class CrashActivity : Activity(), View.OnClickListener {
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(R.layout.activity_crash)
+		textView.text = intent.getStringExtra(Intent.EXTRA_TEXT)
+		button_close.setOnClickListener(this)
+		button_restart.setOnClickListener(this)
+	}
+
+	override fun onClick(v: View) {
+		when(v.id) {
+			R.id.button_close -> {
+				finish()
+			}
+			R.id.button_restart -> {
+				val intent = Intent(applicationContext, MainActivity::class.java)
+				intent.flags = (Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK)
+				startActivity(intent)
+				finish()
+			}
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/utils/MangaShortcut.kt

@@ -22,25 +22,18 @@ import org.koitharu.kotatsu.domain.MangaDataRepository
 import org.koitharu.kotatsu.ui.details.MangaDetailsActivity
 import org.koitharu.kotatsu.utils.ext.safe
 
-object ShortcutUtils {
+class MangaShortcut(private val manga: Manga) {
 
-	suspend fun requestPinShortcut(context: Context, manga: Manga?): Boolean {
-		return manga != null && ShortcutManagerCompat.requestPinShortcut(
-			context,
-			buildShortcutInfo(context, manga).build(),
-			null
-		)
-	}
+	private val shortcutId = manga.id.toString()
 
 	@RequiresApi(Build.VERSION_CODES.N_MR1)
-	suspend fun addAppShortcut(context: Context, manga: Manga) {
-		val id = manga.id.toString()
-		val builder = buildShortcutInfo(context, manga)
+	suspend fun addAppShortcut(context: Context) {
 		val manager = context.getSystemService(Context.SHORTCUT_SERVICE) as ShortcutManager
 		val limit = manager.maxShortcutCountPerActivity
+		val builder = buildShortcutInfo(context, manga)
 		val shortcuts = manager.dynamicShortcuts
 		for (shortcut in shortcuts) {
-			if (shortcut.id == id) {
+			if (shortcut.id == shortcutId) {
 				builder.setRank(shortcut.rank + 1)
 				manager.updateShortcuts(listOf(builder.build().toShortcutInfo()))
 				return
@@ -53,22 +46,23 @@ object ShortcutUtils {
 		manager.addDynamicShortcuts(listOf(builder.build().toShortcutInfo()))
 	}
 
-	@RequiresApi(Build.VERSION_CODES.N_MR1)
-	fun removeAppShortcut(context: Context, manga: Manga) {
-		val id = manga.id.toString()
-		val manager = context.getSystemService(Context.SHORTCUT_SERVICE) as ShortcutManager
-		manager.removeDynamicShortcuts(listOf(id))
+	suspend fun requestPinShortcut(context: Context): Boolean {
+		return ShortcutManagerCompat.requestPinShortcut(
+			context,
+			buildShortcutInfo(context, manga).build(),
+			null
+		)
 	}
 
 	@RequiresApi(Build.VERSION_CODES.N_MR1)
-	fun clearAppShortcuts(context: Context) {
+	fun removeAppShortcut(context: Context) {
 		val manager = context.getSystemService(Context.SHORTCUT_SERVICE) as ShortcutManager
-		manager.removeAllDynamicShortcuts()
+		manager.removeDynamicShortcuts(listOf(shortcutId))
 	}
 
 	private suspend fun buildShortcutInfo(
 		context: Context,
-		manga: Manga
+		manga: Manga,
 	): ShortcutInfoCompat.Builder {
 		val icon = safe {
 			val size = getIconSize(context)
@@ -77,12 +71,7 @@ object ShortcutUtils {
 					size(size)
 					scale(Scale.FILL)
 				}.toBitmap()
-				ThumbnailUtils.extractThumbnail(
-					bmp,
-					size.width,
-					size.height,
-					ThumbnailUtils.OPTIONS_RECYCLE_INPUT
-				)
+				ThumbnailUtils.extractThumbnail(bmp, size.width, size.height, 0)
 			}
 		}
 		MangaDataRepository().storeManga(manga)
@@ -109,4 +98,13 @@ object ShortcutUtils {
 			}
 		}
 	}
+
+	companion object {
+
+		@RequiresApi(Build.VERSION_CODES.N_MR1)
+		fun clearAppShortcuts(context: Context) {
+			val manager = context.getSystemService(Context.SHORTCUT_SERVICE) as ShortcutManager
+			manager.removeAllDynamicShortcuts()
+		}
+	}
 }

app/src/main/java/org/koitharu/kotatsu/utils/UiUtils.kt

@@ -1,9 +1,7 @@
 package org.koitharu.kotatsu.utils
 
 import android.content.Context
-import android.graphics.Color
 import android.view.View
-import androidx.annotation.ColorInt
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import org.koitharu.kotatsu.R
@@ -14,16 +12,6 @@ import kotlin.math.roundToInt
 
 object UiUtils {
 
-	@JvmStatic
-	@ColorInt
-	fun invertColor(@ColorInt color: Int): Int {
-		val red = Color.red(color)
-		val green = Color.green(color)
-		val blue = Color.blue(color)
-		val alpha = Color.alpha(color)
-		return Color.argb(alpha, 255 - red, 255 - green, 255 - blue)
-	}
-
 	@JvmStatic
 	fun resolveGridSpanCount(context: Context, width: Int = 0): Int {
 		val scaleFactor = AppSettings(context).gridSize / 100f

app/src/main/java/org/koitharu/kotatsu/utils/ext/ContextExt.kt

@@ -1,11 +0,0 @@
-package org.koitharu.kotatsu.utils.ext
-
-import android.content.Context
-import androidx.appcompat.app.AlertDialog
-
-@Deprecated("Useless")
-fun Context.showDialog(block: AlertDialog.Builder.() -> Unit): AlertDialog {
-    return AlertDialog.Builder(this)
-        .apply(block)
-        .show()
-}

app/src/main/java/org/koitharu/kotatsu/utils/ext/ParseExt.kt

@@ -5,7 +5,6 @@ import okhttp3.internal.closeQuietly
 import org.json.JSONObject
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
-import org.jsoup.nodes.Element
 
 fun Response.parseHtml(): Document {
 	try {
@@ -28,6 +27,4 @@ fun Response.parseJson(): JSONObject {
 	} finally {
 		closeQuietly()
 	}
-}
-
-fun Element.firstChild(): Element? = children().first()
+}

app/src/main/java/org/koitharu/kotatsu/utils/ext/PrimitiveExt.kt

@@ -4,8 +4,6 @@ import java.text.DecimalFormat
 import java.text.NumberFormat
 import java.util.*
 
-fun Number?.asBoolean() = (this?.toInt() ?: 0) > 0
-
 fun Number.format(decimals: Int = 0, decPoint: Char = '.', thousandsSep: Char? = ' '): String {
 	val formatter = NumberFormat.getInstance(Locale.US) as DecimalFormat
 	val symbols = formatter.decimalFormatSymbols

app/src/main/java/org/koitharu/kotatsu/utils/ext/StringExt.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.utils.ext
 
+import android.net.Uri
 import java.net.URLEncoder
 
 fun String.longHashCode(): Long {
@@ -57,7 +58,7 @@ fun String.transliterate(skipMissing: Boolean): String {
 	}
 }
 
-fun String.toFileName() = this.transliterate(false)
+fun String.toFileNameSafe() = this.transliterate(false)
 	.replace(Regex("[^a-z0-9_\\-]", setOf(RegexOption.IGNORE_CASE)), " ")
 	.replace(Regex("\\s+"), "_")
 
@@ -65,4 +66,10 @@ fun String.ellipsize(maxLength: Int) = if (this.length > maxLength) {
 	this.take(maxLength - 1) + Typography.ellipsis
 } else this
 
-fun String.urlEncoded(): String = URLEncoder.encode(this, Charsets.UTF_8.name())
+fun String.urlEncoded(): String = URLEncoder.encode(this, Charsets.UTF_8.name())
+
+fun String.toUriOrNull(): Uri? = if (isEmpty()) {
+	null
+} else {
+	Uri.parse(this)
+}

app/src/main/java/org/koitharu/kotatsu/utils/ext/ThemeExt.kt

@@ -17,6 +17,7 @@ fun Context.getThemeDrawable(@AttrRes resId: Int) = obtainStyledAttributes(intAr
 }
 
 @ColorInt
-fun Context.getThemeColor(@AttrRes resId: Int, @ColorInt default: Int = Color.TRANSPARENT) = obtainStyledAttributes(intArrayOf(resId)).use {
-	it.getColor(0, default)
-}
+fun Context.getThemeColor(@AttrRes resId: Int, @ColorInt default: Int = Color.TRANSPARENT) =
+	obtainStyledAttributes(intArrayOf(resId)).use {
+		it.getColor(0, default)
+	}

app/src/main/java/org/koitharu/kotatsu/utils/ext/ViewExt.kt

@@ -2,11 +2,9 @@ package org.koitharu.kotatsu.utils.ext
 
 import android.app.Activity
 import android.graphics.Rect
-import android.graphics.drawable.Drawable
 import android.util.Log
 import android.view.*
 import android.view.inputmethod.InputMethodManager
-import android.widget.EditText
 import android.widget.TextView
 import androidx.annotation.LayoutRes
 import androidx.annotation.MenuRes
@@ -23,7 +21,6 @@ import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.chip.Chip
 import com.google.android.material.chip.ChipGroup
 import org.koitharu.kotatsu.ui.common.ChipsFactory
-import kotlin.math.roundToInt
 
 fun View.hideKeyboard() {
 	val imm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
@@ -35,14 +32,9 @@ fun View.showKeyboard() {
 	imm.showSoftInput(this, 0)
 }
 
-val EditText.plainText
-	get() = text?.toString().orEmpty()
-
 inline fun <reified T : View> ViewGroup.inflate(@LayoutRes resId: Int) =
 	LayoutInflater.from(context).inflate(resId, this, false) as T
 
-val TextView.hasText get() = !text.isNullOrEmpty()
-
 fun RecyclerView.lookupSpanSize(callback: (Int) -> Int) {
 	(layoutManager as? GridLayoutManager)?.spanSizeLookup =
 		object : GridLayoutManager.SpanSizeLookup() {
@@ -53,20 +45,6 @@ fun RecyclerView.lookupSpanSize(callback: (Int) -> Int) {
 val RecyclerView.hasItems: Boolean
 	get() = (adapter?.itemCount ?: 0) > 0
 
-var TextView.drawableStart: Drawable?
-	get() = compoundDrawablesRelative[0]
-	set(value) {
-		val old = compoundDrawablesRelative
-		setCompoundDrawablesRelativeWithIntrinsicBounds(value, old[1], old[2], old[3])
-	}
-
-var TextView.drawableEnd: Drawable?
-	get() = compoundDrawablesRelative[2]
-	set(value) {
-		val old = compoundDrawablesRelative
-		setCompoundDrawablesRelativeWithIntrinsicBounds(old[0], old[1], value, old[3])
-	}
-
 var TextView.textAndVisible: CharSequence?
 	get() = text?.takeIf { visibility == View.VISIBLE }
 	set(value) {
@@ -106,7 +84,7 @@ fun View.disableFor(timeInMillis: Long) {
 
 fun View.showPopupMenu(
 	@MenuRes menuRes: Int, onPrepare: ((Menu) -> Unit)? = null,
-	onItemClick: (MenuItem) -> Boolean
+	onItemClick: (MenuItem) -> Boolean,
 ) {
 	val menu = PopupMenu(context, this)
 	menu.inflate(menuRes)
@@ -182,9 +160,8 @@ fun RecyclerView.doOnCurrentItemChanged(callback: (Int) -> Unit) {
 
 		override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
 			super.onScrolled(recyclerView, dx, dy)
-			val item = (recyclerView.layoutManager as? LinearLayoutManager)
-				?.findMiddleVisibleItemPosition()
-			if (item != null && item != RecyclerView.NO_POSITION && item != lastItem) {
+			val item = recyclerView.findCenterViewPosition()
+			if (item != RecyclerView.NO_POSITION && item != lastItem) {
 				lastItem = item
 				callback(item)
 			}
@@ -222,6 +199,9 @@ fun ViewPager2.callOnPageChaneListeners() {
 	}
 }
 
-fun LinearLayoutManager.findMiddleVisibleItemPosition(): Int {
-	return ((findFirstVisibleItemPosition() + findLastVisibleItemPosition()) / 2.0).roundToInt()
+fun RecyclerView.findCenterViewPosition(): Int {
+	val centerX = width / 2f
+	val centerY = height / 2f
+	val view = findChildViewUnder(centerX, centerY) ?: return RecyclerView.NO_POSITION
+	return getChildAdapterPosition(view)
 }

app/src/main/res/drawable-anydpi-v24/ic_stat_book_plus.xml

@@ -0,0 +1,10 @@
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24"
+	android:viewportHeight="24">
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M4,6H2V20A2,2 0 0,0 4,22H18V20H4V6M20,2H8A2,2 0 0,0 6,4V16A2,2 0 0,0 8,18H20A2,2 0 0,0 22,16V4A2,2 0 0,0 20,2M20,12L17.5,10.5L15,12V4H20V12Z" />
+</vector>

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

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:tint="?attr/colorControlNormal"
+	android:viewportWidth="24"
+	android:viewportHeight="24">
+	<path
+		android:fillColor="#000"
+		android:pathData="M13,5V11H14.17L12,13.17L9.83,11H11V5H13M15,3H9V9H5L12,16L19,9H15V3M19,18H5V20H19V18Z" />
+</vector>

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

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:orientation="vertical">
+
+	<ScrollView
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_above="@id/button_close"
+		android:layout_alignParentStart="true"
+		android:layout_alignParentTop="true"
+		android:layout_alignParentEnd="true"
+		android:layout_marginTop="2dp"
+		android:layout_marginBottom="2dp">
+
+		<TextView
+			android:id="@+id/textView"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:paddingStart="2dp"
+			android:paddingEnd="2dp"
+			android:textIsSelectable="true" />
+	</ScrollView>
+
+	<Button
+		android:id="@+id/button_close"
+		style="@android:style/Widget.DeviceDefault.Button.Borderless"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_alignParentBottom="true"
+		android:layout_toStartOf="@id/button_restart"
+		android:text="@string/close" />
+
+	<Button
+		android:id="@+id/button_restart"
+		style="@android:style/Widget.DeviceDefault.Button.Borderless"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_alignParentEnd="true"
+		android:layout_alignParentBottom="true"
+		android:text="@string/restart" />
+
+</RelativeLayout>

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

@@ -45,6 +45,7 @@
             app:backgroundTint="?colorAccent"
             app:layout_anchor="@id/container"
             app:layout_anchorGravity="bottom|end"
+            app:layout_dodgeInsetEdges="bottom"
             app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"
             tools:visibility="visible" />
 

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

@@ -22,6 +22,7 @@
 		android:gravity="end|bottom"
 		android:padding="12dp"
 		android:singleLine="true"
+		android:textColor="@android:color/black"
 		android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6"
 		tools:text="2" />
 

app/src/main/res/menu/popup_read.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+	<item
+		android:id="@+id/action_read"
+		android:title="@string/read_from_start" />
+
+</menu>

app/src/main/res/values-ru/plurals.xml

@@ -10,4 +10,9 @@
 		<item quantity="few">%1$d элемента</item>
 		<item quantity="many">%1$d элементов</item>
 	</plurals>
+	<plurals name="new_chapters">
+		<item quantity="one">%1$d новая глава</item>
+		<item quantity="few">%1$d новых главы</item>
+		<item quantity="many">%1$d новых глав</item>
+	</plurals>
 </resources>

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

@@ -113,4 +113,13 @@
 	<string name="save_manga">Сохранить мангу</string>
 	<string name="notifications">Уведомления</string>
 	<string name="enabled_d_from_d">Включено %1$d из %2$d</string>
+	<string name="new_chapters">Новые главы</string>
+	<string name="show_notification_new_chapters">Уведомлять об обновлении манги, которую Вы читаете</string>
+	<string name="download">Загрузить</string>
+	<string name="read_from_start">Читать с начала</string>
+	<string name="restart">Перезапустить</string>
+	<string name="notifications_settings">Настройки уведомлений</string>
+	<string name="notification_sound">Звук уведомления</string>
+	<string name="light_indicator">Световая индикация</string>
+	<string name="vibration">Вибросигнал</string>
 </resources>

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

@@ -14,6 +14,11 @@
 	<string name="key_reader_switchers">reader_switchers</string>
 	<string name="key_app_update">app_update</string>
 	<string name="key_app_update_auto">app_update_auto</string>
+	<string name="key_tracker_notifications">tracker_notifications</string>
+	<string name="key_notifications_settings">notifications_settings</string>
+	<string name="key_notifications_sound">notifications_sound</string>
+	<string name="key_notifications_vibrate">notifications_vibrate</string>
+	<string name="key_notifications_light">notifications_light</string>
 
 	<string name="key_parser_domain">domain</string>
 	<string-array name="values_theme">

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

@@ -8,4 +8,8 @@
 		<item quantity="one">%1$d item</item>
 		<item quantity="other">%1$d items</item>
 	</plurals>
+	<plurals name="new_chapters">
+		<item quantity="one">%1$d new chapter</item>
+		<item quantity="other">%1$d new chapters</item>
+	</plurals>
 </resources>

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

@@ -61,7 +61,7 @@
 	<string name="automatic">Automatic</string>
 	<string name="pages">Pages</string>
 	<string name="clear">Clear</string>
-	<string name="text_clear_history_prompt">Are you rally want to clear all your reading history? This action cannot be undone.</string>
+	<string name="text_clear_history_prompt">Do you really want to clear all your reading history? This action cannot be undone.</string>
 	<string name="remove">Remove</string>
 	<string name="_s_removed_from_history">\"%s\" removed from history</string>
 	<string name="_s_deleted_from_local_storage">\"%s\" deleted from local storage</string>
@@ -85,7 +85,7 @@
 	<string name="grid_size">Grid size</string>
 	<string name="search_results_on_s">Search results on %s</string>
     <string name="delete_manga">Delete manga</string>
-	<string name="text_delete_local_manga">Are you really want to delete \"%s\" from your phone\'s local storage? \nThis operation cannot be undone.</string>
+	<string name="text_delete_local_manga">Do you really want to delete \"%s\" from your phone\'s local storage? \nThis operation cannot be undone.</string>
 	<string name="reader_settings">Reader settings</string>
 	<string name="switch_pages">Switch pages</string>
 	<string name="taps_on_edges">Taps on edges</string>
@@ -110,8 +110,17 @@
     <string name="about_app">About</string>
 	<string name="show_notification_app_update">Show notification if update is available</string>
 	<string name="open_in_browser">Open in browser</string>
-	<string name="large_manga_save_confirm">This manga has %d chapters. Are you want to save all of it?</string>
+	<string name="large_manga_save_confirm">This manga has %d chapters. Do you want to save all of it?</string>
 	<string name="save_manga">Save manga</string>
 	<string name="notifications">Notifications</string>
 	<string name="enabled_d_from_d">Enabled %1$d from %2$d</string>
+	<string name="new_chapters">New chapters</string>
+	<string name="show_notification_new_chapters">Notify about updates of manga you are reading</string>
+	<string name="download">Download</string>
+	<string name="read_from_start">Read from start</string>
+	<string name="restart">Restart</string>
+	<string name="notifications_settings">Notifications settings</string>
+	<string name="notification_sound">Notification sound</string>
+	<string name="light_indicator">Light indicator</string>
+	<string name="vibration">Vibration</string>
 </resources>

app/src/main/res/xml/pref_main.xml

@@ -61,9 +61,21 @@
 			android:key="@string/key_app_update_auto"
 			android:summary="@string/show_notification_app_update"
 			android:title="@string/application_update"
-			app:allowDividerBelow="true"
 			app:iconSpaceReserved="false" />
 
+		<SwitchPreference
+			android:defaultValue="true"
+			android:key="@string/key_tracker_notifications"
+			android:summary="@string/show_notification_new_chapters"
+			android:title="@string/new_chapters"
+			app:iconSpaceReserved="false" />
+
+		<Preference
+			android:title="@string/notifications_settings"
+			app:iconSpaceReserved="false"
+			android:dependency="@string/key_tracker_notifications"
+			android:key="@string/key_notifications_settings" />
+
 	</PreferenceCategory>
 
 </PreferenceScreen>

app/src/main/res/xml/pref_notifications.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto">
+
+	<Preference
+		android:key="@string/key_notifications_sound"
+		android:title="@string/notification_sound"
+		app:iconSpaceReserved="false" />
+
+	<CheckBoxPreference
+		android:defaultValue="false"
+		android:key="@string/key_notifications_vibrate"
+		android:title="@string/vibration"
+		app:iconSpaceReserved="false" />
+
+	<CheckBoxPreference
+		android:defaultValue="true"
+		android:key="@string/key_notifications_light"
+		android:title="@string/light_indicator"
+		app:iconSpaceReserved="false" />
+
+</PreferenceScreen>

build.gradle

@@ -9,7 +9,7 @@ buildscript {
 		}
 	}
 	dependencies {
-		classpath 'com.android.tools.build:gradle:4.0.0-beta03'
+		classpath 'com.android.tools.build:gradle:4.1.0-alpha05'
 		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
 		// NOTE: Do not place your application dependencies here; they belong