Move sources from java to kotlin dir

2023-05-22 18:16:50 +03:00
parent a8f5714b35
commit c3216871ed
711 changed files with 1 additions and 0 deletions
--- a/app/src/main/kotlin/org/koitharu/kotatsu/KotatsuApp.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/KotatsuApp.kt
@@ -0,0 +1,144 @@
+package org.koitharu.kotatsu
+
+import android.app.Application
+import android.content.Context
+import android.os.StrictMode
+import androidx.annotation.WorkerThread
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.fragment.app.strictmode.FragmentStrictMode
+import androidx.hilt.work.HiltWorkerFactory
+import androidx.room.InvalidationTracker
+import androidx.work.Configuration
+import dagger.hilt.android.HiltAndroidApp
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import org.acra.ReportField
+import org.acra.config.dialog
+import org.acra.config.httpSender
+import org.acra.data.StringFormat
+import org.acra.ktx.initAcra
+import org.acra.sender.HttpSender
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.WorkServiceStopHelper
+import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
+import org.koitharu.kotatsu.local.data.PagesCache
+import org.koitharu.kotatsu.local.domain.LocalMangaRepository
+import org.koitharu.kotatsu.parsers.MangaLoaderContext
+import org.koitharu.kotatsu.reader.domain.PageLoader
+import javax.inject.Inject
+
+@HiltAndroidApp
+class KotatsuApp : Application(), Configuration.Provider {
+
+	@Inject
+	lateinit var databaseObservers: Set<@JvmSuppressWildcards InvalidationTracker.Observer>
+
+	@Inject
+	lateinit var activityLifecycleCallbacks: Set<@JvmSuppressWildcards ActivityLifecycleCallbacks>
+
+	@Inject
+	lateinit var database: MangaDatabase
+
+	@Inject
+	lateinit var settings: AppSettings
+
+	@Inject
+	lateinit var workerFactory: HiltWorkerFactory
+
+	override fun onCreate() {
+		super.onCreate()
+		if (BuildConfig.DEBUG) {
+			enableStrictMode()
+		}
+		AppCompatDelegate.setDefaultNightMode(settings.theme)
+		AppCompatDelegate.setApplicationLocales(settings.appLocales)
+		setupActivityLifecycleCallbacks()
+		processLifecycleScope.launch(Dispatchers.Default) {
+			setupDatabaseObservers()
+		}
+		WorkServiceStopHelper(applicationContext).setup()
+	}
+
+	override fun attachBaseContext(base: Context?) {
+		super.attachBaseContext(base)
+		initAcra {
+			buildConfigClass = BuildConfig::class.java
+			reportFormat = StringFormat.JSON
+			excludeMatchingSharedPreferencesKeys = listOf(
+				"sources_\\w+",
+			)
+			httpSender {
+				uri = getString(R.string.url_error_report)
+				basicAuthLogin = getString(R.string.acra_login)
+				basicAuthPassword = getString(R.string.acra_password)
+				httpMethod = HttpSender.Method.POST
+			}
+			reportContent = listOf(
+				ReportField.PACKAGE_NAME,
+				ReportField.INSTALLATION_ID,
+				ReportField.APP_VERSION_CODE,
+				ReportField.APP_VERSION_NAME,
+				ReportField.ANDROID_VERSION,
+				ReportField.PHONE_MODEL,
+				ReportField.STACK_TRACE,
+				ReportField.CRASH_CONFIGURATION,
+				ReportField.SHARED_PREFERENCES,
+			)
+			dialog {
+				text = getString(R.string.crash_text)
+				title = getString(R.string.error_occurred)
+				positiveButtonText = getString(R.string.send)
+				resIcon = R.drawable.ic_alert_outline
+				resTheme = android.R.style.Theme_Material_Light_Dialog_Alert
+			}
+		}
+	}
+
+	override fun getWorkManagerConfiguration(): Configuration {
+		return Configuration.Builder()
+			.setWorkerFactory(workerFactory)
+			.build()
+	}
+
+	@WorkerThread
+	private fun setupDatabaseObservers() {
+		val tracker = database.invalidationTracker
+		databaseObservers.forEach {
+			tracker.addObserver(it)
+		}
+	}
+
+	private fun setupActivityLifecycleCallbacks() {
+		activityLifecycleCallbacks.forEach {
+			registerActivityLifecycleCallbacks(it)
+		}
+	}
+
+	private fun enableStrictMode() {
+		StrictMode.setThreadPolicy(
+			StrictMode.ThreadPolicy.Builder()
+				.detectAll()
+				.penaltyLog()
+				.build(),
+		)
+		StrictMode.setVmPolicy(
+			StrictMode.VmPolicy.Builder()
+				.detectAll()
+				.setClassInstanceLimit(LocalMangaRepository::class.java, 1)
+				.setClassInstanceLimit(PagesCache::class.java, 1)
+				.setClassInstanceLimit(MangaLoaderContext::class.java, 1)
+				.setClassInstanceLimit(PageLoader::class.java, 1)
+				.penaltyLog()
+				.build(),
+		)
+		FragmentStrictMode.defaultPolicy = FragmentStrictMode.Policy.Builder()
+			.penaltyDeath()
+			.detectFragmentReuse()
+			.detectWrongFragmentContainer()
+			.detectRetainInstanceUsage()
+			.detectSetUserVisibleHint()
+			.detectFragmentTagUsage()
+			.build()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/BookmarkEntity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/BookmarkEntity.kt
@@ -0,0 +1,29 @@
+package org.koitharu.kotatsu.bookmarks.data
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
+
+@Entity(
+	tableName = "bookmarks",
+	primaryKeys = ["manga_id", "page_id"],
+	foreignKeys = [
+		ForeignKey(
+			entity = MangaEntity::class,
+			parentColumns = ["manga_id"],
+			childColumns = ["manga_id"],
+			onDelete = ForeignKey.CASCADE
+		),
+	]
+)
+data class BookmarkEntity(
+	@ColumnInfo(name = "manga_id", index = true) val mangaId: Long,
+	@ColumnInfo(name = "page_id", index = true) val pageId: Long,
+	@ColumnInfo(name = "chapter_id") val chapterId: Long,
+	@ColumnInfo(name = "page") val page: Int,
+	@ColumnInfo(name = "scroll") val scroll: Int,
+	@ColumnInfo(name = "image") val imageUrl: String,
+	@ColumnInfo(name = "created_at") val createdAt: Long,
+	@ColumnInfo(name = "percent") val percent: Float,
+)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/BookmarksDao.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/BookmarksDao.kt
@@ -0,0 +1,33 @@
+package org.koitharu.kotatsu.bookmarks.data
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+import org.koitharu.kotatsu.core.db.entity.MangaWithTags
+
+@Dao
+abstract class BookmarksDao {
+
+	@Query("SELECT * FROM bookmarks WHERE manga_id = :mangaId AND page_id = :pageId")
+	abstract suspend fun find(mangaId: Long, pageId: Long): BookmarkEntity?
+
+	@Query("SELECT * FROM bookmarks WHERE manga_id = :mangaId AND chapter_id = :chapterId AND page = :page")
+	abstract fun observe(mangaId: Long, chapterId: Long, page: Int): Flow<BookmarkEntity?>
+
+	@Query("SELECT * FROM bookmarks WHERE manga_id = :mangaId ORDER BY created_at DESC")
+	abstract fun observe(mangaId: Long): Flow<List<BookmarkEntity>>
+
+	@Transaction
+	@Query(
+		"SELECT * FROM manga JOIN bookmarks ON bookmarks.manga_id = manga.manga_id ORDER BY bookmarks.created_at"
+	)
+	abstract fun observe(): Flow<Map<MangaWithTags, List<BookmarkEntity>>>
+
+	@Insert
+	abstract suspend fun insert(entity: BookmarkEntity)
+
+	@Delete
+	abstract suspend fun delete(entity: BookmarkEntity)
+
+	@Query("DELETE FROM bookmarks WHERE manga_id = :mangaId AND page_id = :pageId")
+	abstract suspend fun delete(mangaId: Long, pageId: Long)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/EntityMapping.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/data/EntityMapping.kt
@@ -0,0 +1,33 @@
+package org.koitharu.kotatsu.bookmarks.data
+
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.parsers.model.Manga
+import java.util.*
+
+fun BookmarkEntity.toBookmark(manga: Manga) = Bookmark(
+	manga = manga,
+	pageId = pageId,
+	chapterId = chapterId,
+	page = page,
+	scroll = scroll,
+	imageUrl = imageUrl,
+	createdAt = Date(createdAt),
+	percent = percent,
+)
+
+fun Bookmark.toEntity() = BookmarkEntity(
+	mangaId = manga.id,
+	pageId = pageId,
+	chapterId = chapterId,
+	page = page,
+	scroll = scroll,
+	imageUrl = imageUrl,
+	createdAt = createdAt.time,
+	percent = percent,
+)
+
+fun Collection<BookmarkEntity>.toBookmarks(manga: Manga) = map {
+	it.toBookmark(manga)
+}
+
+fun Collection<Bookmark>.ids() = map { it.pageId }
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/domain/Bookmark.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/domain/Bookmark.kt
@@ -0,0 +1,46 @@
+package org.koitharu.kotatsu.bookmarks.domain
+
+import org.koitharu.kotatsu.parsers.model.Manga
+import java.util.*
+
+class Bookmark(
+	val manga: Manga,
+	val pageId: Long,
+	val chapterId: Long,
+	val page: Int,
+	val scroll: Int,
+	val imageUrl: String,
+	val createdAt: Date,
+	val percent: Float,
+) {
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+
+		other as Bookmark
+
+		if (manga != other.manga) return false
+		if (pageId != other.pageId) return false
+		if (chapterId != other.chapterId) return false
+		if (page != other.page) return false
+		if (scroll != other.scroll) return false
+		if (imageUrl != other.imageUrl) return false
+		if (createdAt != other.createdAt) return false
+		if (percent != other.percent) return false
+
+		return true
+	}
+
+	override fun hashCode(): Int {
+		var result = manga.hashCode()
+		result = 31 * result + pageId.hashCode()
+		result = 31 * result + chapterId.hashCode()
+		result = 31 * result + page
+		result = 31 * result + scroll
+		result = 31 * result + imageUrl.hashCode()
+		result = 31 * result + createdAt.hashCode()
+		result = 31 * result + percent.hashCode()
+		return result
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/domain/BookmarksRepository.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/domain/BookmarksRepository.kt
@@ -0,0 +1,92 @@
+package org.koitharu.kotatsu.bookmarks.domain
+
+import android.database.SQLException
+import androidx.room.withTransaction
+import dagger.Reusable
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import org.koitharu.kotatsu.bookmarks.data.BookmarkEntity
+import org.koitharu.kotatsu.bookmarks.data.toBookmark
+import org.koitharu.kotatsu.bookmarks.data.toBookmarks
+import org.koitharu.kotatsu.bookmarks.data.toEntity
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.db.entity.toEntities
+import org.koitharu.kotatsu.core.db.entity.toEntity
+import org.koitharu.kotatsu.core.db.entity.toManga
+import org.koitharu.kotatsu.core.ui.util.ReversibleHandle
+import org.koitharu.kotatsu.core.util.ext.mapItems
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.util.ext.printStackTraceDebug
+import javax.inject.Inject
+
+@Reusable
+class BookmarksRepository @Inject constructor(
+	private val db: MangaDatabase,
+) {
+
+	fun observeBookmark(manga: Manga, chapterId: Long, page: Int): Flow<Bookmark?> {
+		return db.bookmarksDao.observe(manga.id, chapterId, page).map { it?.toBookmark(manga) }
+	}
+
+	fun observeBookmarks(manga: Manga): Flow<List<Bookmark>> {
+		return db.bookmarksDao.observe(manga.id).mapItems { it.toBookmark(manga) }
+	}
+
+	fun observeBookmarks(): Flow<Map<Manga, List<Bookmark>>> {
+		return db.bookmarksDao.observe().map { map ->
+			val res = LinkedHashMap<Manga, List<Bookmark>>(map.size)
+			for ((k, v) in map) {
+				val manga = k.toManga()
+				res[manga] = v.toBookmarks(manga)
+			}
+			res
+		}
+	}
+
+	suspend fun addBookmark(bookmark: Bookmark) {
+		db.withTransaction {
+			val tags = bookmark.manga.tags.toEntities()
+			db.tagsDao.upsert(tags)
+			db.mangaDao.upsert(bookmark.manga.toEntity(), tags)
+			db.bookmarksDao.insert(bookmark.toEntity())
+		}
+	}
+
+	suspend fun removeBookmark(mangaId: Long, pageId: Long) {
+		db.bookmarksDao.delete(mangaId, pageId)
+	}
+
+	suspend fun removeBookmarks(ids: Map<Manga, Set<Long>>): ReversibleHandle {
+		val entities = ArrayList<BookmarkEntity>(ids.size)
+		db.withTransaction {
+			val dao = db.bookmarksDao
+			for ((manga, idSet) in ids) {
+				for (pageId in idSet) {
+					val e = dao.find(manga.id, pageId)
+					if (e != null) {
+						entities.add(e)
+					}
+					dao.delete(manga.id, pageId)
+				}
+			}
+		}
+		return BookmarksRestorer(entities)
+	}
+
+	private inner class BookmarksRestorer(
+		private val entities: Collection<BookmarkEntity>,
+	) : ReversibleHandle {
+
+		override suspend fun reverse() {
+			db.withTransaction {
+				for (e in entities) {
+					try {
+						db.bookmarksDao.insert(e)
+					} catch (e: SQLException) {
+						e.printStackTraceDebug()
+					}
+				}
+			}
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksActivity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksActivity.kt
@@ -0,0 +1,54 @@
+package org.koitharu.kotatsu.bookmarks.ui
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import androidx.core.graphics.Insets
+import androidx.core.view.updatePadding
+import androidx.fragment.app.commit
+import com.google.android.material.appbar.AppBarLayout
+import dagger.hilt.android.AndroidEntryPoint
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.ui.BaseActivity
+import org.koitharu.kotatsu.databinding.ActivityContainerBinding
+import org.koitharu.kotatsu.main.ui.owners.AppBarOwner
+import org.koitharu.kotatsu.main.ui.owners.SnackbarOwner
+
+@AndroidEntryPoint
+class BookmarksActivity :
+	BaseActivity<ActivityContainerBinding>(),
+	AppBarOwner,
+	SnackbarOwner {
+
+	override val appBar: AppBarLayout
+		get() = viewBinding.appbar
+
+	override val snackbarHost: CoordinatorLayout
+		get() = viewBinding.root
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(ActivityContainerBinding.inflate(layoutInflater))
+		supportActionBar?.setDisplayHomeAsUpEnabled(true)
+		val fm = supportFragmentManager
+		if (fm.findFragmentById(R.id.container) == null) {
+			fm.commit {
+				val fragment = BookmarksFragment.newInstance()
+				replace(R.id.container, fragment)
+			}
+		}
+	}
+
+	override fun onWindowInsetsChanged(insets: Insets) {
+		viewBinding.root.updatePadding(
+			left = insets.left,
+			right = insets.right,
+		)
+	}
+
+	companion object {
+
+		fun newIntent(context: Context) = Intent(context, BookmarksActivity::class.java)
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksFragment.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksFragment.kt
@@ -0,0 +1,199 @@
+package org.koitharu.kotatsu.bookmarks.ui
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuItem
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.appcompat.view.ActionMode
+import androidx.core.graphics.Insets
+import androidx.core.view.updateLayoutParams
+import androidx.core.view.updatePadding
+import androidx.fragment.app.viewModels
+import coil.ImageLoader
+import com.google.android.material.snackbar.Snackbar
+import dagger.hilt.android.AndroidEntryPoint
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.bookmarks.data.ids
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.bookmarks.ui.adapter.BookmarksGroupAdapter
+import org.koitharu.kotatsu.bookmarks.ui.model.BookmarksGroup
+import org.koitharu.kotatsu.core.exceptions.resolve.SnackbarErrorObserver
+import org.koitharu.kotatsu.core.ui.BaseFragment
+import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.ui.list.SectionedSelectionController
+import org.koitharu.kotatsu.core.ui.list.decor.AbstractSelectionItemDecoration
+import org.koitharu.kotatsu.core.ui.list.decor.SpacingItemDecoration
+import org.koitharu.kotatsu.core.ui.list.fastscroll.FastScroller
+import org.koitharu.kotatsu.core.ui.util.ReversibleAction
+import org.koitharu.kotatsu.core.ui.util.reverseAsync
+import org.koitharu.kotatsu.core.util.ext.invalidateNestedItemDecorations
+import org.koitharu.kotatsu.core.util.ext.scaleUpActivityOptionsOf
+import org.koitharu.kotatsu.databinding.FragmentListSimpleBinding
+import org.koitharu.kotatsu.details.ui.DetailsActivity
+import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.main.ui.owners.AppBarOwner
+import org.koitharu.kotatsu.main.ui.owners.SnackbarOwner
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.reader.ui.ReaderActivity
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class BookmarksFragment :
+	BaseFragment<FragmentListSimpleBinding>(),
+	ListStateHolderListener,
+	OnListItemClickListener<Bookmark>,
+	SectionedSelectionController.Callback<Manga>,
+	FastScroller.FastScrollListener {
+
+	@Inject
+	lateinit var coil: ImageLoader
+
+	private val viewModel by viewModels<BookmarksViewModel>()
+	private var adapter: BookmarksGroupAdapter? = null
+	private var selectionController: SectionedSelectionController<Manga>? = null
+
+	override fun onCreateViewBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentListSimpleBinding {
+		return FragmentListSimpleBinding.inflate(inflater, container, false)
+	}
+
+	override fun onViewBindingCreated(binding: FragmentListSimpleBinding, savedInstanceState: Bundle?) {
+		super.onViewBindingCreated(binding, savedInstanceState)
+		selectionController = SectionedSelectionController(
+			activity = requireActivity(),
+			owner = this,
+			callback = this,
+		)
+		adapter = BookmarksGroupAdapter(
+			lifecycleOwner = viewLifecycleOwner,
+			coil = coil,
+			listener = this,
+			selectionController = checkNotNull(selectionController),
+			bookmarkClickListener = this,
+			groupClickListener = OnGroupClickListener(),
+		)
+		binding.recyclerView.adapter = adapter
+		binding.recyclerView.setHasFixedSize(true)
+		val spacingDecoration = SpacingItemDecoration(resources.getDimensionPixelOffset(R.dimen.grid_spacing))
+		binding.recyclerView.addItemDecoration(spacingDecoration)
+
+		viewModel.content.observe(viewLifecycleOwner, ::onListChanged)
+		viewModel.onError.observe(viewLifecycleOwner, SnackbarErrorObserver(binding.recyclerView, this))
+		viewModel.onActionDone.observe(viewLifecycleOwner, ::onActionDone)
+	}
+
+	override fun onDestroyView() {
+		super.onDestroyView()
+		adapter = null
+		selectionController = null
+	}
+
+	override fun onItemClick(item: Bookmark, view: View) {
+		if (selectionController?.onItemClick(item.manga, item.pageId) != true) {
+			val intent = ReaderActivity.newIntent(view.context, item)
+			startActivity(intent, scaleUpActivityOptionsOf(view).toBundle())
+			Toast.makeText(view.context, R.string.incognito_mode, Toast.LENGTH_SHORT).show()
+		}
+	}
+
+	override fun onItemLongClick(item: Bookmark, view: View): Boolean {
+		return selectionController?.onItemLongClick(item.manga, item.pageId) ?: false
+	}
+
+	override fun onRetryClick(error: Throwable) = Unit
+
+	override fun onEmptyActionClick() = Unit
+
+	override fun onFastScrollStart(fastScroller: FastScroller) {
+		(activity as? AppBarOwner)?.appBar?.setExpanded(false, true)
+	}
+
+	override fun onFastScrollStop(fastScroller: FastScroller) = Unit
+
+	override fun onSelectionChanged(controller: SectionedSelectionController<Manga>, count: Int) {
+		requireViewBinding().recyclerView.invalidateNestedItemDecorations()
+	}
+
+	override fun onCreateActionMode(
+		controller: SectionedSelectionController<Manga>,
+		mode: ActionMode,
+		menu: Menu,
+	): Boolean {
+		mode.menuInflater.inflate(R.menu.mode_bookmarks, menu)
+		return true
+	}
+
+	override fun onActionItemClicked(
+		controller: SectionedSelectionController<Manga>,
+		mode: ActionMode,
+		item: MenuItem,
+	): Boolean {
+		return when (item.itemId) {
+			R.id.action_remove -> {
+				val ids = selectionController?.snapshot() ?: return false
+				viewModel.removeBookmarks(ids)
+				mode.finish()
+				true
+			}
+
+			else -> false
+		}
+	}
+
+	override fun onCreateItemDecoration(
+		controller: SectionedSelectionController<Manga>,
+		section: Manga,
+	): AbstractSelectionItemDecoration = BookmarksSelectionDecoration(requireContext())
+
+	override fun onWindowInsetsChanged(insets: Insets) {
+		requireViewBinding().recyclerView.updatePadding(
+			bottom = insets.bottom,
+		)
+		requireViewBinding().recyclerView.fastScroller.updateLayoutParams<ViewGroup.MarginLayoutParams> {
+			bottomMargin = insets.bottom
+		}
+	}
+
+	private fun onListChanged(list: List<ListModel>) {
+		adapter?.items = list
+	}
+
+	private fun onActionDone(action: ReversibleAction) {
+		val handle = action.handle
+		val length = if (handle == null) Snackbar.LENGTH_SHORT else Snackbar.LENGTH_LONG
+		val snackbar = Snackbar.make((activity as SnackbarOwner).snackbarHost, action.stringResId, length)
+		if (handle != null) {
+			snackbar.setAction(R.string.undo) { handle.reverseAsync() }
+		}
+		snackbar.show()
+	}
+
+	private inner class OnGroupClickListener : OnListItemClickListener<BookmarksGroup> {
+
+		override fun onItemClick(item: BookmarksGroup, view: View) {
+			val controller = selectionController
+			if (controller != null && controller.count > 0) {
+				if (controller.getSectionCount(item.manga) == item.bookmarks.size) {
+					controller.clearSelection(item.manga)
+				} else {
+					controller.addToSelection(item.manga, item.bookmarks.ids())
+				}
+				return
+			}
+			val intent = DetailsActivity.newIntent(view.context, item.manga)
+			startActivity(intent)
+		}
+
+		override fun onItemLongClick(item: BookmarksGroup, view: View): Boolean {
+			return selectionController?.addToSelection(item.manga, item.bookmarks.ids()) ?: false
+		}
+	}
+
+	companion object {
+
+		fun newInstance() = BookmarksFragment()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksSelectionDecoration.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksSelectionDecoration.kt
@@ -0,0 +1,17 @@
+package org.koitharu.kotatsu.bookmarks.ui
+
+import android.content.Context
+import android.view.View
+import androidx.recyclerview.widget.RecyclerView
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.core.util.ext.getItem
+import org.koitharu.kotatsu.list.ui.MangaSelectionDecoration
+
+class BookmarksSelectionDecoration(context: Context) : MangaSelectionDecoration(context) {
+
+	override fun getItemId(parent: RecyclerView, child: View): Long {
+		val holder = parent.getChildViewHolder(child) ?: return RecyclerView.NO_ID
+		val item = holder.getItem(Bookmark::class.java) ?: return RecyclerView.NO_ID
+		return item.pageId
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksViewModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/BookmarksViewModel.kt
@@ -0,0 +1,54 @@
+package org.koitharu.kotatsu.bookmarks.ui
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.map
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.bookmarks.domain.BookmarksRepository
+import org.koitharu.kotatsu.bookmarks.ui.model.BookmarksGroup
+import org.koitharu.kotatsu.core.ui.BaseViewModel
+import org.koitharu.kotatsu.core.ui.util.ReversibleAction
+import org.koitharu.kotatsu.core.util.SingleLiveEvent
+import org.koitharu.kotatsu.core.util.asFlowLiveData
+import org.koitharu.kotatsu.list.ui.model.EmptyState
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.list.ui.model.LoadingState
+import org.koitharu.kotatsu.list.ui.model.toErrorState
+import org.koitharu.kotatsu.parsers.model.Manga
+import javax.inject.Inject
+
+@HiltViewModel
+class BookmarksViewModel @Inject constructor(
+	private val repository: BookmarksRepository,
+) : BaseViewModel() {
+
+	val onActionDone = SingleLiveEvent<ReversibleAction>()
+
+	val content: LiveData<List<ListModel>> = repository.observeBookmarks()
+		.map { list ->
+			if (list.isEmpty()) {
+				listOf(
+					EmptyState(
+						icon = R.drawable.ic_empty_favourites,
+						textPrimary = R.string.no_bookmarks_yet,
+						textSecondary = R.string.no_bookmarks_summary,
+						actionStringRes = 0,
+					),
+				)
+			} else list.map { (manga, bookmarks) ->
+				BookmarksGroup(manga, bookmarks)
+			}
+		}
+		.catch { e -> emit(listOf(e.toErrorState(canRetry = false))) }
+		.asFlowLiveData(viewModelScope.coroutineContext + Dispatchers.Default, listOf(LoadingState))
+
+	fun removeBookmarks(ids: Map<Manga, Set<Long>>) {
+		launchJob(Dispatchers.Default) {
+			val handle = repository.removeBookmarks(ids)
+			onActionDone.emitCall(ReversibleAction(R.string.bookmarks_removed, handle))
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarkListAD.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarkListAD.kt
@@ -0,0 +1,46 @@
+package org.koitharu.kotatsu.bookmarks.ui.adapter
+
+import androidx.lifecycle.LifecycleOwner
+import coil.ImageLoader
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.core.ui.image.CoverSizeResolver
+import org.koitharu.kotatsu.core.ui.list.AdapterDelegateClickListenerAdapter
+import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.util.ext.decodeRegion
+import org.koitharu.kotatsu.core.util.ext.disposeImageRequest
+import org.koitharu.kotatsu.core.util.ext.enqueueWith
+import org.koitharu.kotatsu.core.util.ext.newImageRequest
+import org.koitharu.kotatsu.core.util.ext.source
+import org.koitharu.kotatsu.databinding.ItemBookmarkBinding
+
+fun bookmarkListAD(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	clickListener: OnListItemClickListener<Bookmark>,
+) = adapterDelegateViewBinding<Bookmark, Bookmark, ItemBookmarkBinding>(
+	{ inflater, parent -> ItemBookmarkBinding.inflate(inflater, parent, false) },
+) {
+	val listener = AdapterDelegateClickListenerAdapter(this, clickListener)
+
+	binding.root.setOnClickListener(listener)
+	binding.root.setOnLongClickListener(listener)
+
+	bind {
+		binding.imageViewThumb.newImageRequest(lifecycleOwner, item.imageUrl)?.run {
+			size(CoverSizeResolver(binding.imageViewThumb))
+			placeholder(R.drawable.ic_placeholder)
+			fallback(R.drawable.ic_placeholder)
+			error(R.drawable.ic_error_placeholder)
+			allowRgb565(true)
+			decodeRegion(item.scroll)
+			source(item.manga.source)
+			enqueueWith(coil)
+		}
+	}
+
+	onViewRecycled {
+		binding.imageViewThumb.disposeImageRequest()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksAdapter.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksAdapter.kt
@@ -0,0 +1,30 @@
+package org.koitharu.kotatsu.bookmarks.ui.adapter
+
+import androidx.lifecycle.LifecycleOwner
+import androidx.recyclerview.widget.DiffUtil
+import coil.ImageLoader
+import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+
+class BookmarksAdapter(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	clickListener: OnListItemClickListener<Bookmark>,
+) : AsyncListDifferDelegationAdapter<Bookmark>(
+	DiffCallback(),
+	bookmarkListAD(coil, lifecycleOwner, clickListener),
+) {
+
+	private class DiffCallback : DiffUtil.ItemCallback<Bookmark>() {
+
+		override fun areItemsTheSame(oldItem: Bookmark, newItem: Bookmark): Boolean {
+			return oldItem.manga.id == newItem.manga.id && oldItem.pageId == newItem.pageId
+		}
+
+		override fun areContentsTheSame(oldItem: Bookmark, newItem: Bookmark): Boolean {
+			return oldItem.imageUrl == newItem.imageUrl
+		}
+
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksGroupAD.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksGroupAD.kt
@@ -0,0 +1,69 @@
+package org.koitharu.kotatsu.bookmarks.ui.adapter
+
+import android.view.View
+import androidx.lifecycle.LifecycleOwner
+import androidx.recyclerview.widget.RecyclerView
+import coil.ImageLoader
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.bookmarks.ui.model.BookmarksGroup
+import org.koitharu.kotatsu.core.ui.image.CoverSizeResolver
+import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.ui.list.SectionedSelectionController
+import org.koitharu.kotatsu.core.ui.list.decor.SpacingItemDecoration
+import org.koitharu.kotatsu.core.util.ext.clearItemDecorations
+import org.koitharu.kotatsu.core.util.ext.disposeImageRequest
+import org.koitharu.kotatsu.core.util.ext.enqueueWith
+import org.koitharu.kotatsu.core.util.ext.newImageRequest
+import org.koitharu.kotatsu.core.util.ext.source
+import org.koitharu.kotatsu.databinding.ItemBookmarksGroupBinding
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.model.Manga
+
+fun bookmarksGroupAD(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	sharedPool: RecyclerView.RecycledViewPool,
+	selectionController: SectionedSelectionController<Manga>,
+	bookmarkClickListener: OnListItemClickListener<Bookmark>,
+	groupClickListener: OnListItemClickListener<BookmarksGroup>,
+) = adapterDelegateViewBinding<BookmarksGroup, ListModel, ItemBookmarksGroupBinding>(
+	{ layoutInflater, parent -> ItemBookmarksGroupBinding.inflate(layoutInflater, parent, false) },
+) {
+	val viewListenerAdapter = object : View.OnClickListener, View.OnLongClickListener {
+		override fun onClick(v: View) = groupClickListener.onItemClick(item, v)
+		override fun onLongClick(v: View) = groupClickListener.onItemLongClick(item, v)
+	}
+
+	val adapter = BookmarksAdapter(coil, lifecycleOwner, bookmarkClickListener)
+	binding.recyclerView.setRecycledViewPool(sharedPool)
+	binding.recyclerView.adapter = adapter
+	val spacingDecoration = SpacingItemDecoration(context.resources.getDimensionPixelOffset(R.dimen.grid_spacing))
+	binding.recyclerView.addItemDecoration(spacingDecoration)
+	binding.root.setOnClickListener(viewListenerAdapter)
+	binding.root.setOnLongClickListener(viewListenerAdapter)
+
+	bind { payloads ->
+		if (payloads.isEmpty()) {
+			binding.recyclerView.clearItemDecorations()
+			binding.recyclerView.addItemDecoration(spacingDecoration)
+			selectionController.attachToRecyclerView(item.manga, binding.recyclerView)
+		}
+		binding.imageViewCover.newImageRequest(lifecycleOwner, item.manga.coverUrl)?.run {
+			placeholder(R.drawable.ic_placeholder)
+			fallback(R.drawable.ic_placeholder)
+			error(R.drawable.ic_error_placeholder)
+			allowRgb565(true)
+			size(CoverSizeResolver(binding.imageViewCover))
+			source(item.manga.source)
+			enqueueWith(coil)
+		}
+		binding.textViewTitle.text = item.manga.title
+		adapter.items = item.bookmarks
+	}
+
+	onViewRecycled {
+		binding.imageViewCover.disposeImageRequest()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksGroupAdapter.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/adapter/BookmarksGroupAdapter.kt
@@ -0,0 +1,77 @@
+package org.koitharu.kotatsu.bookmarks.ui.adapter
+
+import androidx.lifecycle.LifecycleOwner
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import coil.ImageLoader
+import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.bookmarks.ui.model.BookmarksGroup
+import org.koitharu.kotatsu.core.ui.list.OnListItemClickListener
+import org.koitharu.kotatsu.core.ui.list.SectionedSelectionController
+import org.koitharu.kotatsu.list.ui.adapter.ListStateHolderListener
+import org.koitharu.kotatsu.list.ui.adapter.emptyStateListAD
+import org.koitharu.kotatsu.list.ui.adapter.errorStateListAD
+import org.koitharu.kotatsu.list.ui.adapter.loadingFooterAD
+import org.koitharu.kotatsu.list.ui.adapter.loadingStateAD
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.list.ui.model.LoadingFooter
+import org.koitharu.kotatsu.parsers.model.Manga
+import kotlin.jvm.internal.Intrinsics
+
+class BookmarksGroupAdapter(
+	coil: ImageLoader,
+	lifecycleOwner: LifecycleOwner,
+	selectionController: SectionedSelectionController<Manga>,
+	listener: ListStateHolderListener,
+	bookmarkClickListener: OnListItemClickListener<Bookmark>,
+	groupClickListener: OnListItemClickListener<BookmarksGroup>,
+) : AsyncListDifferDelegationAdapter<ListModel>(DiffCallback()) {
+
+	init {
+		val pool = RecyclerView.RecycledViewPool()
+		delegatesManager
+			.addDelegate(
+				bookmarksGroupAD(
+					coil = coil,
+					lifecycleOwner = lifecycleOwner,
+					sharedPool = pool,
+					selectionController = selectionController,
+					bookmarkClickListener = bookmarkClickListener,
+					groupClickListener = groupClickListener,
+				),
+			)
+			.addDelegate(loadingStateAD())
+			.addDelegate(loadingFooterAD())
+			.addDelegate(emptyStateListAD(coil, lifecycleOwner, listener))
+			.addDelegate(errorStateListAD(listener))
+	}
+
+	private class DiffCallback : DiffUtil.ItemCallback<ListModel>() {
+
+		override fun areItemsTheSame(oldItem: ListModel, newItem: ListModel): Boolean {
+			return when {
+				oldItem is BookmarksGroup && newItem is BookmarksGroup -> {
+					oldItem.manga.id == newItem.manga.id
+				}
+
+				oldItem is LoadingFooter && newItem is LoadingFooter -> {
+					oldItem.key == newItem.key
+				}
+
+				else -> oldItem.javaClass == newItem.javaClass
+			}
+		}
+
+		override fun areContentsTheSame(oldItem: ListModel, newItem: ListModel): Boolean {
+			return Intrinsics.areEqual(oldItem, newItem)
+		}
+
+		override fun getChangePayload(oldItem: ListModel, newItem: ListModel): Any? {
+			return when {
+				oldItem is BookmarksGroup && newItem is BookmarksGroup -> Unit
+				else -> super.getChangePayload(oldItem, newItem)
+			}
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/model/BookmarksGroup.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/bookmarks/ui/model/BookmarksGroup.kt
@@ -0,0 +1,31 @@
+package org.koitharu.kotatsu.bookmarks.ui.model
+
+import org.koitharu.kotatsu.bookmarks.domain.Bookmark
+import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.util.areItemsEquals
+
+class BookmarksGroup(
+	val manga: Manga,
+	val bookmarks: List<Bookmark>,
+) : ListModel {
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+
+		other as BookmarksGroup
+
+		if (manga != other.manga) return false
+
+		return bookmarks.areItemsEquals(other.bookmarks) { a, b ->
+			a.imageUrl == b.imageUrl
+		}
+	}
+
+	override fun hashCode(): Int {
+		var result = manga.hashCode()
+		result = 31 * result + bookmarks.sumOf { it.imageUrl.hashCode() }
+		return result
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/BrowserActivity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/BrowserActivity.kt
@@ -0,0 +1,143 @@
+package org.koitharu.kotatsu.browser
+
+import android.annotation.SuppressLint
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.core.graphics.Insets
+import androidx.core.view.isVisible
+import androidx.core.view.updatePadding
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.network.CommonHeadersInterceptor
+import org.koitharu.kotatsu.core.ui.BaseActivity
+import org.koitharu.kotatsu.core.util.ext.catchingWebViewUnavailability
+import org.koitharu.kotatsu.databinding.ActivityBrowserBinding
+import com.google.android.material.R as materialR
+
+@SuppressLint("SetJavaScriptEnabled")
+class BrowserActivity : BaseActivity<ActivityBrowserBinding>(), BrowserCallback {
+
+	private lateinit var onBackPressedCallback: WebViewBackPressedCallback
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		if (!catchingWebViewUnavailability { setContentView(ActivityBrowserBinding.inflate(layoutInflater)) }) {
+			return
+		}
+		supportActionBar?.run {
+			setDisplayHomeAsUpEnabled(true)
+			setHomeAsUpIndicator(materialR.drawable.abc_ic_clear_material)
+		}
+		with(viewBinding.webView.settings) {
+			javaScriptEnabled = true
+			userAgentString = CommonHeadersInterceptor.userAgentChrome
+		}
+		viewBinding.webView.webViewClient = BrowserClient(this)
+		viewBinding.webView.webChromeClient = ProgressChromeClient(viewBinding.progressBar)
+		onBackPressedCallback = WebViewBackPressedCallback(viewBinding.webView)
+		onBackPressedDispatcher.addCallback(onBackPressedCallback)
+		if (savedInstanceState != null) {
+			return
+		}
+		val url = intent?.dataString
+		if (url.isNullOrEmpty()) {
+			finishAfterTransition()
+		} else {
+			onTitleChanged(
+				intent?.getStringExtra(EXTRA_TITLE) ?: getString(R.string.loading_),
+				url,
+			)
+			viewBinding.webView.loadUrl(url)
+		}
+	}
+
+	override fun onSaveInstanceState(outState: Bundle) {
+		super.onSaveInstanceState(outState)
+		viewBinding.webView.saveState(outState)
+	}
+
+	override fun onRestoreInstanceState(savedInstanceState: Bundle) {
+		super.onRestoreInstanceState(savedInstanceState)
+		viewBinding.webView.restoreState(savedInstanceState)
+	}
+
+	override fun onCreateOptionsMenu(menu: Menu): Boolean {
+		super.onCreateOptionsMenu(menu)
+		menuInflater.inflate(R.menu.opt_browser, menu)
+		return true
+	}
+
+	override fun onOptionsItemSelected(item: MenuItem): Boolean = when (item.itemId) {
+		android.R.id.home -> {
+			viewBinding.webView.stopLoading()
+			finishAfterTransition()
+			true
+		}
+
+		R.id.action_browser -> {
+			val intent = Intent(Intent.ACTION_VIEW)
+			intent.data = Uri.parse(viewBinding.webView.url)
+			try {
+				startActivity(Intent.createChooser(intent, item.title))
+			} catch (_: ActivityNotFoundException) {
+			}
+			true
+		}
+
+		else -> super.onOptionsItemSelected(item)
+	}
+
+	override fun onPause() {
+		viewBinding.webView.onPause()
+		super.onPause()
+	}
+
+	override fun onResume() {
+		super.onResume()
+		viewBinding.webView.onResume()
+	}
+
+	override fun onDestroy() {
+		super.onDestroy()
+		viewBinding.webView.destroy()
+	}
+
+	override fun onLoadingStateChanged(isLoading: Boolean) {
+		viewBinding.progressBar.isVisible = isLoading
+	}
+
+	override fun onTitleChanged(title: CharSequence, subtitle: CharSequence?) {
+		this.title = title
+		supportActionBar?.subtitle = subtitle
+	}
+
+	override fun onHistoryChanged() {
+		onBackPressedCallback.onHistoryChanged()
+	}
+
+	override fun onWindowInsetsChanged(insets: Insets) {
+		viewBinding.appbar.updatePadding(
+			top = insets.top,
+		)
+		viewBinding.root.updatePadding(
+			left = insets.left,
+			right = insets.right,
+			bottom = insets.bottom,
+		)
+	}
+
+	companion object {
+
+		private const val EXTRA_TITLE = "title"
+
+		fun newIntent(context: Context, url: String, title: String?): Intent {
+			return Intent(context, BrowserActivity::class.java)
+				.setData(Uri.parse(url))
+				.putExtra(EXTRA_TITLE, title)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/BrowserCallback.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/BrowserCallback.kt
@@ -0,0 +1,8 @@
+package org.koitharu.kotatsu.browser
+
+interface BrowserCallback : OnHistoryChangedListener {
+
+	fun onLoadingStateChanged(isLoading: Boolean)
+
+	fun onTitleChanged(title: CharSequence, subtitle: CharSequence?)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/BrowserClient.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/BrowserClient.kt
@@ -0,0 +1,28 @@
+package org.koitharu.kotatsu.browser
+
+import android.graphics.Bitmap
+import android.webkit.WebView
+import android.webkit.WebViewClient
+
+open class BrowserClient(private val callback: BrowserCallback) : WebViewClient() {
+
+	override fun onPageFinished(webView: WebView, url: String) {
+		super.onPageFinished(webView, url)
+		callback.onLoadingStateChanged(isLoading = false)
+	}
+
+	override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
+		super.onPageStarted(view, url, favicon)
+		callback.onLoadingStateChanged(isLoading = true)
+	}
+
+	override fun onPageCommitVisible(view: WebView, url: String?) {
+		super.onPageCommitVisible(view, url)
+		callback.onTitleChanged(view.title.orEmpty(), url)
+	}
+
+	override fun doUpdateVisitedHistory(view: WebView?, url: String?, isReload: Boolean) {
+		super.doUpdateVisitedHistory(view, url, isReload)
+		callback.onHistoryChanged()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/OnHistoryChangedListener.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/OnHistoryChangedListener.kt
@@ -0,0 +1,6 @@
+package org.koitharu.kotatsu.browser
+
+fun interface OnHistoryChangedListener {
+
+	fun onHistoryChanged()
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/ProgressChromeClient.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/ProgressChromeClient.kt
@@ -0,0 +1,30 @@
+package org.koitharu.kotatsu.browser
+
+import android.webkit.WebChromeClient
+import android.webkit.WebView
+import androidx.core.view.isVisible
+import com.google.android.material.progressindicator.BaseProgressIndicator
+
+private const val PROGRESS_MAX = 100
+
+class ProgressChromeClient(
+	private val progressIndicator: BaseProgressIndicator<*>,
+) : WebChromeClient() {
+
+	init {
+		progressIndicator.max = PROGRESS_MAX
+	}
+
+	override fun onProgressChanged(view: WebView?, newProgress: Int) {
+		super.onProgressChanged(view, newProgress)
+		if (!progressIndicator.isVisible) {
+			return
+		}
+		if (newProgress in 1 until PROGRESS_MAX) {
+			progressIndicator.isIndeterminate = false
+			progressIndicator.setProgressCompat(newProgress.coerceAtMost(PROGRESS_MAX), true)
+		} else {
+			progressIndicator.isIndeterminate = true
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/WebViewBackPressedCallback.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/WebViewBackPressedCallback.kt
@@ -0,0 +1,21 @@
+package org.koitharu.kotatsu.browser
+
+import android.webkit.WebView
+import androidx.activity.OnBackPressedCallback
+
+class WebViewBackPressedCallback(
+	private val webView: WebView,
+) : OnBackPressedCallback(false), OnHistoryChangedListener {
+
+	init {
+		onHistoryChanged()
+	}
+
+	override fun handleOnBackPressed() {
+		webView.goBack()
+	}
+
+	override fun onHistoryChanged() {
+		isEnabled = webView.canGoBack()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareCallback.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareCallback.kt
@@ -0,0 +1,14 @@
+package org.koitharu.kotatsu.browser.cloudflare
+
+import org.koitharu.kotatsu.browser.BrowserCallback
+
+interface CloudFlareCallback : BrowserCallback {
+
+	override fun onLoadingStateChanged(isLoading: Boolean) = Unit
+
+	override fun onTitleChanged(title: CharSequence, subtitle: CharSequence?) = Unit
+
+	fun onPageLoaded()
+
+	fun onCheckPassed()
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareClient.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareClient.kt
@@ -0,0 +1,45 @@
+package org.koitharu.kotatsu.browser.cloudflare
+
+import android.graphics.Bitmap
+import android.webkit.WebView
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import org.koitharu.kotatsu.browser.BrowserClient
+import org.koitharu.kotatsu.core.network.cookies.MutableCookieJar
+
+private const val CF_CLEARANCE = "cf_clearance"
+
+class CloudFlareClient(
+	private val cookieJar: MutableCookieJar,
+	private val callback: CloudFlareCallback,
+	private val targetUrl: String,
+) : BrowserClient(callback) {
+
+	private val oldClearance = getClearance()
+
+	override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
+		super.onPageStarted(view, url, favicon)
+		checkClearance()
+	}
+
+	override fun onPageCommitVisible(view: WebView, url: String?) {
+		super.onPageCommitVisible(view, url)
+		callback.onPageLoaded()
+	}
+
+	override fun onPageFinished(webView: WebView, url: String) {
+		super.onPageFinished(webView, url)
+		callback.onPageLoaded()
+	}
+
+	private fun checkClearance() {
+		val clearance = getClearance()
+		if (clearance != null && clearance != oldClearance) {
+			callback.onCheckPassed()
+		}
+	}
+
+	private fun getClearance(): String? {
+		return cookieJar.loadForRequest(targetUrl.toHttpUrl())
+			.find { it.name == CF_CLEARANCE }?.value
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareDialog.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CloudFlareDialog.kt
@@ -0,0 +1,123 @@
+package org.koitharu.kotatsu.browser.cloudflare
+
+import android.content.DialogInterface
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import android.webkit.CookieManager
+import android.webkit.WebSettings
+import androidx.appcompat.app.AlertDialog
+import androidx.core.view.isInvisible
+import androidx.fragment.app.setFragmentResult
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import dagger.hilt.android.AndroidEntryPoint
+import okhttp3.Headers
+import org.koitharu.kotatsu.browser.WebViewBackPressedCallback
+import org.koitharu.kotatsu.core.network.CommonHeaders
+import org.koitharu.kotatsu.core.network.CommonHeadersInterceptor
+import org.koitharu.kotatsu.core.network.cookies.MutableCookieJar
+import org.koitharu.kotatsu.core.ui.AlertDialogFragment
+import org.koitharu.kotatsu.core.util.ext.withArgs
+import org.koitharu.kotatsu.databinding.FragmentCloudflareBinding
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class CloudFlareDialog : AlertDialogFragment<FragmentCloudflareBinding>(), CloudFlareCallback {
+
+	private lateinit var url: String
+	private val pendingResult = Bundle(1)
+
+	@Inject
+	lateinit var cookieJar: MutableCookieJar
+
+	private var onBackPressedCallback: WebViewBackPressedCallback? = null
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		url = requireArguments().getString(ARG_URL).orEmpty()
+	}
+
+	override fun onCreateViewBinding(
+		inflater: LayoutInflater,
+		container: ViewGroup?,
+	) = FragmentCloudflareBinding.inflate(inflater, container, false)
+
+	override fun onViewBindingCreated(binding: FragmentCloudflareBinding, savedInstanceState: Bundle?) {
+		super.onViewBindingCreated(binding, savedInstanceState)
+		with(binding.webView.settings) {
+			javaScriptEnabled = true
+			cacheMode = WebSettings.LOAD_DEFAULT
+			domStorageEnabled = true
+			databaseEnabled = true
+			userAgentString = arguments?.getString(ARG_UA) ?: CommonHeadersInterceptor.userAgentChrome
+		}
+		binding.webView.webViewClient = CloudFlareClient(cookieJar, this, url)
+		CookieManager.getInstance().setAcceptThirdPartyCookies(binding.webView, true)
+		if (url.isEmpty()) {
+			dismissAllowingStateLoss()
+		} else {
+			binding.webView.loadUrl(url)
+		}
+	}
+
+	override fun onDestroyView() {
+		requireViewBinding().webView.stopLoading()
+		requireViewBinding().webView.destroy()
+		onBackPressedCallback = null
+		super.onDestroyView()
+	}
+
+	override fun onBuildDialog(builder: MaterialAlertDialogBuilder): MaterialAlertDialogBuilder {
+		return super.onBuildDialog(builder).setNegativeButton(android.R.string.cancel, null)
+	}
+
+	override fun onDialogCreated(dialog: AlertDialog) {
+		super.onDialogCreated(dialog)
+		onBackPressedCallback = WebViewBackPressedCallback(requireViewBinding().webView).also {
+			dialog.onBackPressedDispatcher.addCallback(it)
+		}
+	}
+
+	override fun onResume() {
+		super.onResume()
+		requireViewBinding().webView.onResume()
+	}
+
+	override fun onPause() {
+		requireViewBinding().webView.onPause()
+		super.onPause()
+	}
+
+	override fun onDismiss(dialog: DialogInterface) {
+		setFragmentResult(TAG, pendingResult)
+		super.onDismiss(dialog)
+	}
+
+	override fun onPageLoaded() {
+		viewBinding?.progressBar?.isInvisible = true
+	}
+
+	override fun onCheckPassed() {
+		pendingResult.putBoolean(EXTRA_RESULT, true)
+		dismissAllowingStateLoss()
+	}
+
+	override fun onHistoryChanged() {
+		onBackPressedCallback?.onHistoryChanged()
+	}
+
+	companion object {
+
+		const val TAG = "CloudFlareDialog"
+		const val EXTRA_RESULT = "result"
+		private const val ARG_URL = "url"
+		private const val ARG_UA = "ua"
+
+		fun newInstance(url: String, headers: Headers?) = CloudFlareDialog().withArgs(2) {
+			putString(ARG_URL, url)
+			headers?.get(CommonHeaders.USER_AGENT)?.let {
+				putString(ARG_UA, it)
+			}
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/AppModule.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/AppModule.kt
@@ -0,0 +1,172 @@
+package org.koitharu.kotatsu.core
+
+import android.app.Application
+import android.content.Context
+import android.provider.SearchRecentSuggestions
+import android.text.Html
+import androidx.collection.arraySetOf
+import androidx.room.InvalidationTracker
+import coil.ComponentRegistry
+import coil.ImageLoader
+import coil.decode.SvgDecoder
+import coil.disk.DiskCache
+import coil.util.DebugLogger
+import dagger.Binds
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import dagger.multibindings.ElementsIntoSet
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import okhttp3.OkHttpClient
+import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.core.cache.ContentCache
+import org.koitharu.kotatsu.core.cache.MemoryContentCache
+import org.koitharu.kotatsu.core.cache.StubContentCache
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.core.network.*
+import org.koitharu.kotatsu.core.os.NetworkState
+import org.koitharu.kotatsu.core.os.ShortcutsUpdater
+import org.koitharu.kotatsu.core.parser.MangaLoaderContextImpl
+import org.koitharu.kotatsu.core.parser.MangaRepository
+import org.koitharu.kotatsu.core.parser.favicon.FaviconFetcher
+import org.koitharu.kotatsu.core.ui.image.CoilImageGetter
+import org.koitharu.kotatsu.core.ui.util.ActivityRecreationHandle
+import org.koitharu.kotatsu.core.util.IncognitoModeIndicator
+import org.koitharu.kotatsu.core.util.ext.activityManager
+import org.koitharu.kotatsu.core.util.ext.connectivityManager
+import org.koitharu.kotatsu.core.util.ext.isLowRamDevice
+import org.koitharu.kotatsu.local.data.CacheDir
+import org.koitharu.kotatsu.local.data.CbzFetcher
+import org.koitharu.kotatsu.local.data.LocalManga
+import org.koitharu.kotatsu.local.data.LocalStorageChanges
+import org.koitharu.kotatsu.local.data.PagesCache
+import org.koitharu.kotatsu.main.ui.protect.AppProtectHelper
+import org.koitharu.kotatsu.parsers.MangaLoaderContext
+import org.koitharu.kotatsu.reader.ui.thumbnails.MangaPageFetcher
+import org.koitharu.kotatsu.search.ui.MangaSuggestionsProvider
+import org.koitharu.kotatsu.settings.backup.BackupObserver
+import org.koitharu.kotatsu.sync.domain.SyncController
+import org.koitharu.kotatsu.widget.WidgetUpdater
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+interface AppModule {
+
+	@Binds
+	fun bindMangaLoaderContext(mangaLoaderContextImpl: MangaLoaderContextImpl): MangaLoaderContext
+
+	@Binds
+	fun bindImageGetter(coilImageGetter: CoilImageGetter): Html.ImageGetter
+
+	companion object {
+
+		@Provides
+		@Singleton
+		fun provideNetworkState(
+			@ApplicationContext context: Context
+		) = NetworkState(context.connectivityManager)
+
+		@Provides
+		@Singleton
+		fun provideMangaDatabase(
+			@ApplicationContext context: Context,
+		): MangaDatabase {
+			return MangaDatabase(context)
+		}
+
+		@Provides
+		@Singleton
+		fun provideCoil(
+			@ApplicationContext context: Context,
+			@MangaHttpClient okHttpClient: OkHttpClient,
+			mangaRepositoryFactory: MangaRepository.Factory,
+			pagesCache: PagesCache,
+		): ImageLoader {
+			val diskCacheFactory = {
+				val rootDir = context.externalCacheDir ?: context.cacheDir
+				DiskCache.Builder()
+					.directory(rootDir.resolve(CacheDir.THUMBS.dir))
+					.build()
+			}
+			return ImageLoader.Builder(context)
+				.okHttpClient(okHttpClient.newBuilder().cache(null).build())
+				.interceptorDispatcher(Dispatchers.Default)
+				.fetcherDispatcher(Dispatchers.IO)
+				.decoderDispatcher(Dispatchers.Default)
+				.transformationDispatcher(Dispatchers.Default)
+				.diskCache(diskCacheFactory)
+				.logger(if (BuildConfig.DEBUG) DebugLogger() else null)
+				.allowRgb565(context.isLowRamDevice())
+				.components(
+					ComponentRegistry.Builder()
+						.add(SvgDecoder.Factory())
+						.add(CbzFetcher.Factory())
+						.add(FaviconFetcher.Factory(context, okHttpClient, mangaRepositoryFactory))
+						.add(MangaPageFetcher.Factory(context, okHttpClient, pagesCache, mangaRepositoryFactory))
+						.build(),
+				).build()
+		}
+
+		@Provides
+		fun provideSearchSuggestions(
+			@ApplicationContext context: Context,
+		): SearchRecentSuggestions {
+			return MangaSuggestionsProvider.createSuggestions(context)
+		}
+
+		@Provides
+		@ElementsIntoSet
+		fun provideDatabaseObservers(
+			widgetUpdater: WidgetUpdater,
+			shortcutsUpdater: ShortcutsUpdater,
+			backupObserver: BackupObserver,
+			syncController: SyncController,
+		): Set<@JvmSuppressWildcards InvalidationTracker.Observer> = arraySetOf(
+			widgetUpdater,
+			shortcutsUpdater,
+			backupObserver,
+			syncController,
+		)
+
+		@Provides
+		@ElementsIntoSet
+		fun provideActivityLifecycleCallbacks(
+			appProtectHelper: AppProtectHelper,
+			activityRecreationHandle: ActivityRecreationHandle,
+			incognitoModeIndicator: IncognitoModeIndicator,
+		): Set<@JvmSuppressWildcards Application.ActivityLifecycleCallbacks> = arraySetOf(
+			appProtectHelper,
+			activityRecreationHandle,
+			incognitoModeIndicator,
+		)
+
+		@Provides
+		@Singleton
+		fun provideContentCache(
+			application: Application,
+		): ContentCache {
+			return if (application.activityManager?.isLowRamDevice == true) {
+				StubContentCache()
+			} else {
+				MemoryContentCache(application)
+			}
+		}
+
+		@Provides
+		@Singleton
+		@LocalStorageChanges
+		fun provideMutableLocalStorageChangesFlow(): MutableSharedFlow<LocalManga?> = MutableSharedFlow()
+
+		@Provides
+		@LocalStorageChanges
+		fun provideLocalStorageChangesFlow(
+			@LocalStorageChanges flow: MutableSharedFlow<LocalManga?>,
+		): SharedFlow<LocalManga?> = flow.asSharedFlow()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupEntry.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupEntry.kt
@@ -0,0 +1,17 @@
+package org.koitharu.kotatsu.core.backup
+
+import org.json.JSONArray
+
+class BackupEntry(
+	val name: String,
+	val data: JSONArray
+) {
+
+	companion object Names {
+
+		const val INDEX = "index"
+		const val HISTORY = "history"
+		const val CATEGORIES = "categories"
+		const val FAVOURITES = "favourites"
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupRepository.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupRepository.kt
@@ -0,0 +1,130 @@
+package org.koitharu.kotatsu.core.backup
+
+import androidx.room.withTransaction
+import org.json.JSONArray
+import org.json.JSONObject
+import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.core.db.MangaDatabase
+import org.koitharu.kotatsu.parsers.util.json.JSONIterator
+import org.koitharu.kotatsu.parsers.util.json.mapJSON
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import javax.inject.Inject
+
+private const val PAGE_SIZE = 10
+
+class BackupRepository @Inject constructor(private val db: MangaDatabase) {
+
+	suspend fun dumpHistory(): BackupEntry {
+		var offset = 0
+		val entry = BackupEntry(BackupEntry.HISTORY, JSONArray())
+		while (true) {
+			val history = db.historyDao.findAll(offset, PAGE_SIZE)
+			if (history.isEmpty()) {
+				break
+			}
+			offset += history.size
+			for (item in history) {
+				val manga = JsonSerializer(item.manga).toJson()
+				val tags = JSONArray()
+				item.tags.forEach { tags.put(JsonSerializer(it).toJson()) }
+				manga.put("tags", tags)
+				val json = JsonSerializer(item.history).toJson()
+				json.put("manga", manga)
+				entry.data.put(json)
+			}
+		}
+		return entry
+	}
+
+	suspend fun dumpCategories(): BackupEntry {
+		val entry = BackupEntry(BackupEntry.CATEGORIES, JSONArray())
+		val categories = db.favouriteCategoriesDao.findAll()
+		for (item in categories) {
+			entry.data.put(JsonSerializer(item).toJson())
+		}
+		return entry
+	}
+
+	suspend fun dumpFavourites(): BackupEntry {
+		var offset = 0
+		val entry = BackupEntry(BackupEntry.FAVOURITES, JSONArray())
+		while (true) {
+			val favourites = db.favouritesDao.findAll(offset, PAGE_SIZE)
+			if (favourites.isEmpty()) {
+				break
+			}
+			offset += favourites.size
+			for (item in favourites) {
+				val manga = JsonSerializer(item.manga).toJson()
+				val tags = JSONArray()
+				item.tags.forEach { tags.put(JsonSerializer(it).toJson()) }
+				manga.put("tags", tags)
+				val json = JsonSerializer(item.favourite).toJson()
+				json.put("manga", manga)
+				entry.data.put(json)
+			}
+		}
+		return entry
+	}
+
+	fun createIndex(): BackupEntry {
+		val entry = BackupEntry(BackupEntry.INDEX, JSONArray())
+		val json = JSONObject()
+		json.put("app_id", BuildConfig.APPLICATION_ID)
+		json.put("app_version", BuildConfig.VERSION_CODE)
+		json.put("created_at", System.currentTimeMillis())
+		entry.data.put(json)
+		return entry
+	}
+
+	suspend fun restoreHistory(entry: BackupEntry): CompositeResult {
+		val result = CompositeResult()
+		for (item in entry.data.JSONIterator()) {
+			val mangaJson = item.getJSONObject("manga")
+			val manga = JsonDeserializer(mangaJson).toMangaEntity()
+			val tags = mangaJson.getJSONArray("tags").mapJSON {
+				JsonDeserializer(it).toTagEntity()
+			}
+			val history = JsonDeserializer(item).toHistoryEntity()
+			result += runCatchingCancellable {
+				db.withTransaction {
+					db.tagsDao.upsert(tags)
+					db.mangaDao.upsert(manga, tags)
+					db.historyDao.upsert(history)
+				}
+			}
+		}
+		return result
+	}
+
+	suspend fun restoreCategories(entry: BackupEntry): CompositeResult {
+		val result = CompositeResult()
+		for (item in entry.data.JSONIterator()) {
+			val category = JsonDeserializer(item).toFavouriteCategoryEntity()
+			result += runCatchingCancellable {
+				db.favouriteCategoriesDao.upsert(category)
+			}
+		}
+		return result
+	}
+
+	suspend fun restoreFavourites(entry: BackupEntry): CompositeResult {
+		val result = CompositeResult()
+		for (item in entry.data.JSONIterator()) {
+			val mangaJson = item.getJSONObject("manga")
+			val manga = JsonDeserializer(mangaJson).toMangaEntity()
+			val tags = mangaJson.getJSONArray("tags").mapJSON {
+				JsonDeserializer(it).toTagEntity()
+			}
+			val favourite = JsonDeserializer(item).toFavouriteEntity()
+			result += runCatchingCancellable {
+				db.withTransaction {
+					db.tagsDao.upsert(tags)
+					db.mangaDao.upsert(manga, tags)
+					db.favouritesDao.upsert(favourite)
+				}
+			}
+		}
+		return result
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupZipInput.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupZipInput.kt
@@ -0,0 +1,25 @@
+package org.koitharu.kotatsu.core.backup
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runInterruptible
+import okio.Closeable
+import org.json.JSONArray
+import java.io.File
+import java.util.zip.ZipFile
+
+class BackupZipInput(val file: File) : Closeable {
+
+	private val zipFile = ZipFile(file)
+
+	suspend fun getEntry(name: String): BackupEntry = runInterruptible(Dispatchers.IO) {
+		val entry = zipFile.getEntry(name)
+		val json = zipFile.getInputStream(entry).use {
+			JSONArray(it.bufferedReader().readText())
+		}
+		BackupEntry(name, json)
+	}
+
+	override fun close() {
+		zipFile.close()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupZipOutput.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/BackupZipOutput.kt
@@ -0,0 +1,46 @@
+package org.koitharu.kotatsu.core.backup
+
+import android.content.Context
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runInterruptible
+import okio.Closeable
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.util.ext.format
+import org.koitharu.kotatsu.core.zip.ZipOutput
+import java.io.File
+import java.util.Date
+import java.util.Locale
+import java.util.zip.Deflater
+
+class BackupZipOutput(val file: File) : Closeable {
+
+	private val output = ZipOutput(file, Deflater.BEST_COMPRESSION)
+
+	suspend fun put(entry: BackupEntry) = runInterruptible(Dispatchers.IO) {
+		output.put(entry.name, entry.data.toString(2))
+	}
+
+	suspend fun finish() = runInterruptible(Dispatchers.IO) {
+		output.finish()
+	}
+
+	override fun close() {
+		output.close()
+	}
+}
+
+private const val DIR_BACKUPS = "backups"
+
+suspend fun BackupZipOutput(context: Context): BackupZipOutput = runInterruptible(Dispatchers.IO) {
+	val dir = context.run {
+		getExternalFilesDir(DIR_BACKUPS) ?: File(filesDir, DIR_BACKUPS)
+	}
+	dir.mkdirs()
+	val filename = buildString {
+		append(context.getString(R.string.app_name).replace(' ', '_').lowercase(Locale.ROOT))
+		append('_')
+		append(Date().format("ddMMyyyy"))
+		append(".bk.zip")
+	}
+	BackupZipOutput(File(dir, filename))
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/CompositeResult.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/CompositeResult.kt
@@ -0,0 +1,39 @@
+package org.koitharu.kotatsu.core.backup
+
+class CompositeResult {
+
+	private var successCount: Int = 0
+	private val errors = ArrayList<Throwable?>()
+
+	val size: Int
+		get() = successCount + errors.size
+
+	val failures: List<Throwable>
+		get() = errors.filterNotNull()
+
+	val isAllSuccess: Boolean
+		get() = errors.none { it != null }
+
+	val isAllFailed: Boolean
+		get() = successCount == 0 && errors.isNotEmpty()
+
+	operator fun plusAssign(result: Result<*>) {
+		when {
+			result.isSuccess -> successCount++
+			result.isFailure -> errors.add(result.exceptionOrNull())
+		}
+	}
+
+	operator fun plusAssign(other: CompositeResult) {
+		this.successCount += other.successCount
+		this.errors += other.errors
+	}
+
+	operator fun plus(other: CompositeResult): CompositeResult {
+		val result = CompositeResult()
+		result.successCount = this.successCount + other.successCount
+		result.errors.addAll(this.errors)
+		result.errors.addAll(other.errors)
+		return result
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/JsonDeserializer.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/JsonDeserializer.kt
@@ -0,0 +1,68 @@
+package org.koitharu.kotatsu.core.backup
+
+import org.json.JSONObject
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
+import org.koitharu.kotatsu.core.db.entity.TagEntity
+import org.koitharu.kotatsu.favourites.data.FavouriteCategoryEntity
+import org.koitharu.kotatsu.favourites.data.FavouriteEntity
+import org.koitharu.kotatsu.history.data.HistoryEntity
+import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.json.getBooleanOrDefault
+import org.koitharu.kotatsu.parsers.util.json.getFloatOrDefault
+import org.koitharu.kotatsu.parsers.util.json.getIntOrDefault
+import org.koitharu.kotatsu.parsers.util.json.getStringOrNull
+
+class JsonDeserializer(private val json: JSONObject) {
+
+	fun toFavouriteEntity() = FavouriteEntity(
+		mangaId = json.getLong("manga_id"),
+		categoryId = json.getLong("category_id"),
+		sortKey = json.getIntOrDefault("sort_key", 0),
+		createdAt = json.getLong("created_at"),
+		deletedAt = 0L,
+	)
+
+	fun toMangaEntity() = MangaEntity(
+		id = json.getLong("id"),
+		title = json.getString("title"),
+		altTitle = json.getStringOrNull("alt_title"),
+		url = json.getString("url"),
+		publicUrl = json.getStringOrNull("public_url").orEmpty(),
+		rating = json.getDouble("rating").toFloat(),
+		isNsfw = json.getBooleanOrDefault("nsfw", false),
+		coverUrl = json.getString("cover_url"),
+		largeCoverUrl = json.getStringOrNull("large_cover_url"),
+		state = json.getStringOrNull("state"),
+		author = json.getStringOrNull("author"),
+		source = json.getString("source")
+	)
+
+	fun toTagEntity() = TagEntity(
+		id = json.getLong("id"),
+		title = json.getString("title"),
+		key = json.getString("key"),
+		source = json.getString("source")
+	)
+
+	fun toHistoryEntity() = HistoryEntity(
+		mangaId = json.getLong("manga_id"),
+		createdAt = json.getLong("created_at"),
+		updatedAt = json.getLong("updated_at"),
+		chapterId = json.getLong("chapter_id"),
+		page = json.getInt("page"),
+		scroll = json.getDouble("scroll").toFloat(),
+		percent = json.getFloatOrDefault("percent", -1f),
+		deletedAt = 0L,
+	)
+
+	fun toFavouriteCategoryEntity() = FavouriteCategoryEntity(
+		categoryId = json.getInt("category_id"),
+		createdAt = json.getLong("created_at"),
+		sortKey = json.getInt("sort_key"),
+		title = json.getString("title"),
+		order = json.getStringOrNull("order") ?: SortOrder.NEWEST.name,
+		track = json.getBooleanOrDefault("track", true),
+		isVisibleInLibrary = json.getBooleanOrDefault("show_in_lib", true),
+		deletedAt = 0L,
+	)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/JsonSerializer.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/backup/JsonSerializer.kt
@@ -0,0 +1,72 @@
+package org.koitharu.kotatsu.core.backup
+
+import org.json.JSONObject
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
+import org.koitharu.kotatsu.core.db.entity.TagEntity
+import org.koitharu.kotatsu.favourites.data.FavouriteCategoryEntity
+import org.koitharu.kotatsu.favourites.data.FavouriteEntity
+import org.koitharu.kotatsu.history.data.HistoryEntity
+
+class JsonSerializer private constructor(private val json: JSONObject) {
+
+	constructor(e: FavouriteEntity) : this(
+		JSONObject().apply {
+			put("manga_id", e.mangaId)
+			put("category_id", e.categoryId)
+			put("sort_key", e.sortKey)
+			put("created_at", e.createdAt)
+		}
+	)
+
+	constructor(e: FavouriteCategoryEntity) : this(
+		JSONObject().apply {
+			put("category_id", e.categoryId)
+			put("created_at", e.createdAt)
+			put("sort_key", e.sortKey)
+			put("title", e.title)
+			put("order", e.order)
+			put("track", e.track)
+			put("show_in_lib", e.isVisibleInLibrary)
+		}
+	)
+
+	constructor(e: HistoryEntity) : this(
+		JSONObject().apply {
+			put("manga_id", e.mangaId)
+			put("created_at", e.createdAt)
+			put("updated_at", e.updatedAt)
+			put("chapter_id", e.chapterId)
+			put("page", e.page)
+			put("scroll", e.scroll)
+			put("percent", e.percent)
+		}
+	)
+
+	constructor(e: TagEntity) : this(
+		JSONObject().apply {
+			put("id", e.id)
+			put("title", e.title)
+			put("key", e.key)
+			put("source", e.source)
+		}
+	)
+
+	constructor(e: MangaEntity) : this(
+		JSONObject().apply {
+			put("id", e.id)
+			put("title", e.title)
+			put("alt_title", e.altTitle)
+			put("url", e.url)
+			put("public_url", e.publicUrl)
+			put("rating", e.rating)
+			put("nsfw", e.isNsfw)
+			put("cover_url", e.coverUrl)
+			put("large_cover_url", e.largeCoverUrl)
+			put("state", e.state)
+			put("author", e.author)
+			put("source", e.source)
+		}
+	)
+
+	fun toJson(): JSONObject = json
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ContentCache.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ContentCache.kt
@@ -0,0 +1,23 @@
+package org.koitharu.kotatsu.core.cache
+
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.parsers.model.MangaSource
+
+interface ContentCache {
+
+	val isCachingEnabled: Boolean
+
+	suspend fun getDetails(source: MangaSource, url: String): Manga?
+
+	fun putDetails(source: MangaSource, url: String, details: SafeDeferred<Manga>)
+
+	suspend fun getPages(source: MangaSource, url: String): List<MangaPage>?
+
+	fun putPages(source: MangaSource, url: String, pages: SafeDeferred<List<MangaPage>>)
+
+	data class Key(
+		val source: MangaSource,
+		val url: String,
+	)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringLruCache.kt
@@ -0,0 +1,33 @@
+package org.koitharu.kotatsu.core.cache
+
+import androidx.collection.LruCache
+import java.util.concurrent.TimeUnit
+
+class ExpiringLruCache<T>(
+	val maxSize: Int,
+	private val lifetime: Long,
+	private val timeUnit: TimeUnit,
+) {
+
+	private val cache = LruCache<ContentCache.Key, ExpiringValue<T>>(maxSize)
+
+	operator fun get(key: ContentCache.Key): T? {
+		val value = cache.get(key) ?: return null
+		if (value.isExpired) {
+			cache.remove(key)
+		}
+		return value.get()
+	}
+
+	operator fun set(key: ContentCache.Key, value: T) {
+		cache.put(key, ExpiringValue(value, lifetime, timeUnit))
+	}
+
+	fun clear() {
+		cache.evictAll()
+	}
+
+	fun trimToSize(size: Int) {
+		cache.trimToSize(size)
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringValue.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/ExpiringValue.kt
@@ -0,0 +1,34 @@
+package org.koitharu.kotatsu.core.cache
+
+import android.os.SystemClock
+import java.util.concurrent.TimeUnit
+
+class ExpiringValue<T>(
+	private val value: T,
+	lifetime: Long,
+	timeUnit: TimeUnit,
+) {
+
+	private val expiresAt = SystemClock.elapsedRealtime() + timeUnit.toMillis(lifetime)
+
+	val isExpired: Boolean
+		get() = SystemClock.elapsedRealtime() >= expiresAt
+
+	fun get(): T? = if (isExpired) null else value
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+
+		other as ExpiringValue<*>
+
+		if (value != other.value) return false
+		return expiresAt == other.expiresAt
+	}
+
+	override fun hashCode(): Int {
+		var result = value?.hashCode() ?: 0
+		result = 31 * result + expiresAt.hashCode()
+		return result
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/MemoryContentCache.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/MemoryContentCache.kt
@@ -0,0 +1,60 @@
+package org.koitharu.kotatsu.core.cache
+
+import android.app.Application
+import android.content.ComponentCallbacks2
+import android.content.res.Configuration
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.parsers.model.MangaSource
+import java.util.concurrent.TimeUnit
+
+class MemoryContentCache(application: Application) : ContentCache, ComponentCallbacks2 {
+
+	init {
+		application.registerComponentCallbacks(this)
+	}
+
+	private val detailsCache = ExpiringLruCache<SafeDeferred<Manga>>(4, 5, TimeUnit.MINUTES)
+	private val pagesCache = ExpiringLruCache<SafeDeferred<List<MangaPage>>>(4, 10, TimeUnit.MINUTES)
+
+	override val isCachingEnabled: Boolean = true
+
+	override suspend fun getDetails(source: MangaSource, url: String): Manga? {
+		return detailsCache[ContentCache.Key(source, url)]?.awaitOrNull()
+	}
+
+	override fun putDetails(source: MangaSource, url: String, details: SafeDeferred<Manga>) {
+		detailsCache[ContentCache.Key(source, url)] = details
+	}
+
+	override suspend fun getPages(source: MangaSource, url: String): List<MangaPage>? {
+		return pagesCache[ContentCache.Key(source, url)]?.awaitOrNull()
+	}
+
+	override fun putPages(source: MangaSource, url: String, pages: SafeDeferred<List<MangaPage>>) {
+		pagesCache[ContentCache.Key(source, url)] = pages
+	}
+
+	override fun onConfigurationChanged(newConfig: Configuration) = Unit
+
+	override fun onLowMemory() = Unit
+
+	override fun onTrimMemory(level: Int) {
+		trimCache(detailsCache, level)
+		trimCache(pagesCache, level)
+	}
+
+	private fun trimCache(cache: ExpiringLruCache<*>, level: Int) {
+		when (level) {
+			ComponentCallbacks2.TRIM_MEMORY_RUNNING_CRITICAL,
+			ComponentCallbacks2.TRIM_MEMORY_COMPLETE,
+			ComponentCallbacks2.TRIM_MEMORY_MODERATE -> cache.clear()
+
+			ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN,
+			ComponentCallbacks2.TRIM_MEMORY_RUNNING_LOW,
+			ComponentCallbacks2.TRIM_MEMORY_BACKGROUND -> cache.trimToSize(1)
+
+			else -> cache.trimToSize(cache.maxSize / 2)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/SafeDeferred.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/SafeDeferred.kt
@@ -0,0 +1,20 @@
+package org.koitharu.kotatsu.core.cache
+
+import kotlinx.coroutines.Deferred
+
+class SafeDeferred<T>(
+	private val delegate: Deferred<Result<T>>,
+) {
+
+	suspend fun await(): T {
+		return delegate.await().getOrThrow()
+	}
+
+	suspend fun awaitOrNull(): T? {
+		return delegate.await().getOrNull()
+	}
+
+	fun cancel() {
+		delegate.cancel()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/StubContentCache.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/cache/StubContentCache.kt
@@ -0,0 +1,18 @@
+package org.koitharu.kotatsu.core.cache
+
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.parsers.model.MangaSource
+
+class StubContentCache : ContentCache {
+
+	override val isCachingEnabled: Boolean = false
+
+	override suspend fun getDetails(source: MangaSource, url: String): Manga? = null
+
+	override fun putDetails(source: MangaSource, url: String, details: SafeDeferred<Manga>) = Unit
+
+	override suspend fun getPages(source: MangaSource, url: String): List<MangaPage>? = null
+
+	override fun putPages(source: MangaSource, url: String, pages: SafeDeferred<List<MangaPage>>) = Unit
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/DatabasePrePopulateCallback.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/DatabasePrePopulateCallback.kt
@@ -0,0 +1,25 @@
+package org.koitharu.kotatsu.core.db
+
+import android.content.res.Resources
+import androidx.room.RoomDatabase
+import androidx.sqlite.db.SupportSQLiteDatabase
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.parsers.model.SortOrder
+
+class DatabasePrePopulateCallback(private val resources: Resources) : RoomDatabase.Callback() {
+
+	override fun onCreate(db: SupportSQLiteDatabase) {
+		db.execSQL(
+			"INSERT INTO favourite_categories (created_at, sort_key, title, `order`, track, show_in_lib, `deleted_at`) VALUES (?,?,?,?,?,?,?)",
+			arrayOf(
+				System.currentTimeMillis(),
+				1,
+				resources.getString(R.string.read_later),
+				SortOrder.NEWEST.name,
+				1,
+				1,
+				0L,
+			)
+		)
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/MangaDatabase.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/MangaDatabase.kt
@@ -0,0 +1,118 @@
+package org.koitharu.kotatsu.core.db
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.InvalidationTracker
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.room.migration.Migration
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import org.koitharu.kotatsu.bookmarks.data.BookmarkEntity
+import org.koitharu.kotatsu.bookmarks.data.BookmarksDao
+import org.koitharu.kotatsu.core.db.dao.MangaDao
+import org.koitharu.kotatsu.core.db.dao.PreferencesDao
+import org.koitharu.kotatsu.core.db.dao.TagsDao
+import org.koitharu.kotatsu.core.db.dao.TrackLogsDao
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
+import org.koitharu.kotatsu.core.db.entity.MangaPrefsEntity
+import org.koitharu.kotatsu.core.db.entity.MangaTagsEntity
+import org.koitharu.kotatsu.core.db.entity.TagEntity
+import org.koitharu.kotatsu.core.db.migrations.Migration10To11
+import org.koitharu.kotatsu.core.db.migrations.Migration11To12
+import org.koitharu.kotatsu.core.db.migrations.Migration12To13
+import org.koitharu.kotatsu.core.db.migrations.Migration13To14
+import org.koitharu.kotatsu.core.db.migrations.Migration14To15
+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.db.migrations.Migration4To5
+import org.koitharu.kotatsu.core.db.migrations.Migration5To6
+import org.koitharu.kotatsu.core.db.migrations.Migration6To7
+import org.koitharu.kotatsu.core.db.migrations.Migration7To8
+import org.koitharu.kotatsu.core.db.migrations.Migration8To9
+import org.koitharu.kotatsu.core.db.migrations.Migration9To10
+import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
+import org.koitharu.kotatsu.favourites.data.FavouriteCategoriesDao
+import org.koitharu.kotatsu.favourites.data.FavouriteCategoryEntity
+import org.koitharu.kotatsu.favourites.data.FavouriteEntity
+import org.koitharu.kotatsu.favourites.data.FavouritesDao
+import org.koitharu.kotatsu.history.data.HistoryDao
+import org.koitharu.kotatsu.history.data.HistoryEntity
+import org.koitharu.kotatsu.scrobbling.common.data.ScrobblingDao
+import org.koitharu.kotatsu.scrobbling.common.data.ScrobblingEntity
+import org.koitharu.kotatsu.suggestions.data.SuggestionDao
+import org.koitharu.kotatsu.suggestions.data.SuggestionEntity
+import org.koitharu.kotatsu.tracker.data.TrackEntity
+import org.koitharu.kotatsu.tracker.data.TrackLogEntity
+import org.koitharu.kotatsu.tracker.data.TracksDao
+
+const val DATABASE_VERSION = 15
+
+@Database(
+	entities = [
+		MangaEntity::class, TagEntity::class, HistoryEntity::class, MangaTagsEntity::class,
+		FavouriteCategoryEntity::class, FavouriteEntity::class, MangaPrefsEntity::class,
+		TrackEntity::class, TrackLogEntity::class, SuggestionEntity::class, BookmarkEntity::class,
+		ScrobblingEntity::class,
+	],
+	version = DATABASE_VERSION,
+)
+abstract class MangaDatabase : RoomDatabase() {
+
+	abstract val historyDao: HistoryDao
+
+	abstract val tagsDao: TagsDao
+
+	abstract val mangaDao: MangaDao
+
+	abstract val favouritesDao: FavouritesDao
+
+	abstract val preferencesDao: PreferencesDao
+
+	abstract val favouriteCategoriesDao: FavouriteCategoriesDao
+
+	abstract val tracksDao: TracksDao
+
+	abstract val trackLogsDao: TrackLogsDao
+
+	abstract val suggestionDao: SuggestionDao
+
+	abstract val bookmarksDao: BookmarksDao
+
+	abstract val scrobblingDao: ScrobblingDao
+}
+
+val databaseMigrations: Array<Migration>
+	get() = arrayOf(
+		Migration1To2(),
+		Migration2To3(),
+		Migration3To4(),
+		Migration4To5(),
+		Migration5To6(),
+		Migration6To7(),
+		Migration7To8(),
+		Migration8To9(),
+		Migration9To10(),
+		Migration10To11(),
+		Migration11To12(),
+		Migration12To13(),
+		Migration13To14(),
+		Migration14To15(),
+	)
+
+fun MangaDatabase(context: Context): MangaDatabase = Room
+	.databaseBuilder(context, MangaDatabase::class.java, "kotatsu-db")
+	.addMigrations(*databaseMigrations)
+	.addCallback(DatabasePrePopulateCallback(context.resources))
+	.build()
+
+fun InvalidationTracker.removeObserverAsync(observer: InvalidationTracker.Observer) {
+	val scope = processLifecycleScope
+	if (scope.isActive) {
+		processLifecycleScope.launch(Dispatchers.Default) {
+			removeObserver(observer)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/Tables.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/Tables.kt
@@ -0,0 +1,8 @@
+package org.koitharu.kotatsu.core.db
+
+const val TABLE_FAVOURITES = "favourites"
+const val TABLE_MANGA = "manga"
+const val TABLE_TAGS = "tags"
+const val TABLE_FAVOURITE_CATEGORIES = "favourite_categories"
+const val TABLE_HISTORY = "history"
+const val TABLE_MANGA_TAGS = "manga_tags"
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/MangaDao.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/MangaDao.kt
@@ -0,0 +1,50 @@
+package org.koitharu.kotatsu.core.db.dao
+
+import androidx.room.*
+import org.koitharu.kotatsu.core.db.entity.MangaEntity
+import org.koitharu.kotatsu.core.db.entity.MangaTagsEntity
+import org.koitharu.kotatsu.core.db.entity.MangaWithTags
+import org.koitharu.kotatsu.core.db.entity.TagEntity
+
+@Dao
+abstract class MangaDao {
+
+	@Transaction
+	@Query("SELECT * FROM manga WHERE manga_id = :id")
+	abstract suspend fun find(id: Long): MangaWithTags?
+
+	@Transaction
+	@Query("SELECT * FROM manga WHERE (title LIKE :query OR alt_title LIKE :query) AND manga_id IN (SELECT manga_id FROM favourites UNION SELECT manga_id FROM history) LIMIT :limit")
+	abstract suspend fun searchByTitle(query: String, limit: Int): List<MangaWithTags>
+
+	@Transaction
+	@Query("SELECT * FROM manga WHERE (title LIKE :query OR alt_title LIKE :query) AND source = :source AND manga_id IN (SELECT manga_id FROM favourites UNION SELECT manga_id FROM history) LIMIT :limit")
+	abstract suspend fun searchByTitle(query: String, source: String, limit: Int): List<MangaWithTags>
+
+	@Insert(onConflict = OnConflictStrategy.IGNORE)
+	abstract suspend fun insert(manga: MangaEntity): Long
+
+	@Update(onConflict = OnConflictStrategy.IGNORE)
+	abstract suspend fun update(manga: MangaEntity): Int
+
+	@Insert(onConflict = OnConflictStrategy.IGNORE)
+	abstract suspend fun insertTagRelation(tag: MangaTagsEntity): Long
+
+	@Query("DELETE FROM manga_tags WHERE manga_id = :mangaId")
+	abstract suspend fun clearTagRelation(mangaId: Long)
+
+	@Transaction
+	open suspend fun upsert(manga: MangaEntity, tags: Iterable<TagEntity>? = null) {
+		if (update(manga) <= 0) {
+			insert(manga)
+			if (tags != null) {
+				clearTagRelation(manga.id)
+				tags.map {
+					MangaTagsEntity(manga.id, it.id)
+				}.forEach {
+					insertTagRelation(it)
+				}
+			}
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/PreferencesDao.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/PreferencesDao.kt
@@ -0,0 +1,18 @@
+package org.koitharu.kotatsu.core.db.dao
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+import org.koitharu.kotatsu.core.db.entity.MangaPrefsEntity
+
+@Dao
+abstract class PreferencesDao {
+
+	@Query("SELECT * FROM preferences WHERE manga_id = :mangaId")
+	abstract suspend fun find(mangaId: Long): MangaPrefsEntity?
+
+	@Query("SELECT * FROM preferences WHERE manga_id = :mangaId")
+	abstract fun observe(mangaId: Long): Flow<MangaPrefsEntity?>
+
+	@Upsert
+	abstract suspend fun upsert(pref: MangaPrefsEntity)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/TagsDao.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/TagsDao.kt
@@ -0,0 +1,53 @@
+package org.koitharu.kotatsu.core.db.dao
+
+import androidx.room.*
+import org.koitharu.kotatsu.core.db.entity.TagEntity
+
+@Dao
+abstract class TagsDao {
+
+	@Query("SELECT * FROM tags WHERE source = :source")
+	abstract suspend fun findTags(source: String): List<TagEntity>
+
+	@Query(
+		"""SELECT tags.* FROM tags
+		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id
+		GROUP BY tags.title 
+		ORDER BY COUNT(manga_id) DESC 
+		LIMIT :limit""",
+	)
+	abstract suspend fun findPopularTags(limit: Int): List<TagEntity>
+
+	@Query(
+		"""SELECT tags.* FROM tags
+		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id 
+		WHERE tags.source = :source 
+		GROUP BY tags.title
+		ORDER BY COUNT(manga_id) DESC 
+		LIMIT :limit""",
+	)
+	abstract suspend fun findPopularTags(source: String, limit: Int): List<TagEntity>
+
+	@Query(
+		"""SELECT tags.* FROM tags
+		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id 
+		WHERE tags.source = :source AND title LIKE :query
+		GROUP BY tags.title
+		ORDER BY COUNT(manga_id) DESC 
+		LIMIT :limit""",
+	)
+	abstract suspend fun findTags(source: String, query: String, limit: Int): List<TagEntity>
+
+	@Query(
+		"""SELECT tags.* FROM tags
+		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id 
+		WHERE title LIKE :query
+		GROUP BY tags.title
+		ORDER BY COUNT(manga_id) DESC 
+		LIMIT :limit""",
+	)
+	abstract suspend fun findTags(query: String, limit: Int): List<TagEntity>
+
+	@Upsert
+	abstract suspend fun upsert(tags: Iterable<TagEntity>)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/TrackLogsDao.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/dao/TrackLogsDao.kt
@@ -0,0 +1,29 @@
+package org.koitharu.kotatsu.core.db.dao
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+import org.koitharu.kotatsu.tracker.data.TrackLogEntity
+import org.koitharu.kotatsu.tracker.data.TrackLogWithManga
+
+@Dao
+interface TrackLogsDao {
+
+	@Transaction
+	@Query("SELECT * FROM track_logs ORDER BY created_at DESC LIMIT :limit OFFSET 0")
+	fun observeAll(limit: Int): Flow<List<TrackLogWithManga>>
+
+	@Query("DELETE FROM track_logs")
+	suspend fun clear()
+
+	@Insert(onConflict = OnConflictStrategy.REPLACE)
+	suspend fun insert(entity: TrackLogEntity): Long
+
+	@Query("DELETE FROM track_logs WHERE manga_id = :mangaId")
+	suspend fun removeAll(mangaId: Long)
+
+	@Query("DELETE FROM track_logs WHERE manga_id NOT IN (SELECT manga_id FROM tracks)")
+	suspend fun gc()
+
+	@Query("SELECT COUNT(*) FROM track_logs")
+	suspend fun count(): Int
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt
@@ -0,0 +1,74 @@
+package org.koitharu.kotatsu.core.db.entity
+
+import org.koitharu.kotatsu.core.model.MangaSource
+import org.koitharu.kotatsu.core.util.ext.longHashCode
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaState
+import org.koitharu.kotatsu.parsers.model.MangaTag
+import org.koitharu.kotatsu.parsers.model.SortOrder
+import org.koitharu.kotatsu.parsers.util.mapToSet
+import org.koitharu.kotatsu.parsers.util.toTitleCase
+
+// Entity to model
+
+fun TagEntity.toMangaTag() = MangaTag(
+	key = this.key,
+	title = this.title.toTitleCase(),
+	source = MangaSource(this.source),
+)
+
+fun Collection<TagEntity>.toMangaTags() = mapToSet(TagEntity::toMangaTag)
+
+fun MangaEntity.toManga(tags: Set<MangaTag>) = Manga(
+	id = this.id,
+	title = this.title,
+	altTitle = this.altTitle,
+	state = this.state?.let { MangaState(it) },
+	rating = this.rating,
+	isNsfw = this.isNsfw,
+	url = this.url,
+	publicUrl = this.publicUrl,
+	coverUrl = this.coverUrl,
+	largeCoverUrl = this.largeCoverUrl,
+	author = this.author,
+	source = MangaSource(this.source),
+	tags = tags,
+)
+
+fun MangaWithTags.toManga() = manga.toManga(tags.toMangaTags())
+
+// Model to entity
+
+fun Manga.toEntity() = MangaEntity(
+	id = id,
+	url = url,
+	publicUrl = publicUrl,
+	source = source.name,
+	largeCoverUrl = largeCoverUrl,
+	coverUrl = coverUrl,
+	altTitle = altTitle,
+	rating = rating,
+	isNsfw = isNsfw,
+	state = state?.name,
+	title = title,
+	author = author,
+)
+
+fun MangaTag.toEntity() = TagEntity(
+	title = title,
+	key = key,
+	source = source.name,
+	id = "${key}_${source.name}".longHashCode(),
+)
+
+fun Collection<MangaTag>.toEntities() = map(MangaTag::toEntity)
+
+// Other
+
+fun SortOrder(name: String, fallback: SortOrder): SortOrder = runCatching {
+	SortOrder.valueOf(name)
+}.getOrDefault(fallback)
+
+fun MangaState(name: String): MangaState? = runCatching {
+	MangaState.valueOf(name)
+}.getOrNull()
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt
@@ -0,0 +1,23 @@
+package org.koitharu.kotatsu.core.db.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.koitharu.kotatsu.core.db.TABLE_MANGA
+
+@Entity(tableName = TABLE_MANGA)
+data class MangaEntity(
+	@PrimaryKey(autoGenerate = false)
+	@ColumnInfo(name = "manga_id") val id: Long,
+	@ColumnInfo(name = "title") val title: String,
+	@ColumnInfo(name = "alt_title") val altTitle: String?,
+	@ColumnInfo(name = "url") val url: String,
+	@ColumnInfo(name = "public_url") val publicUrl: String,
+	@ColumnInfo(name = "rating") val rating: Float, // normalized value [0..1] or -1
+	@ColumnInfo(name = "nsfw") val isNsfw: Boolean,
+	@ColumnInfo(name = "cover_url") val coverUrl: String,
+	@ColumnInfo(name = "large_cover_url") val largeCoverUrl: String?,
+	@ColumnInfo(name = "state") val state: String?,
+	@ColumnInfo(name = "author") val author: String?,
+	@ColumnInfo(name = "source") val source: String,
+)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaPrefsEntity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaPrefsEntity.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 = "preferences",
+	foreignKeys = [
+		ForeignKey(
+			entity = MangaEntity::class,
+			parentColumns = ["manga_id"],
+			childColumns = ["manga_id"],
+			onDelete = ForeignKey.CASCADE,
+		),
+	],
+)
+data class MangaPrefsEntity(
+	@PrimaryKey(autoGenerate = false)
+	@ColumnInfo(name = "manga_id")
+	val mangaId: Long,
+	@ColumnInfo(name = "mode") val mode: Int,
+	@ColumnInfo(name = "cf_brightness") val cfBrightness: Float,
+	@ColumnInfo(name = "cf_contrast") val cfContrast: Float,
+)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaTagsEntity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaTagsEntity.kt
@@ -0,0 +1,29 @@
+package org.koitharu.kotatsu.core.db.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import org.koitharu.kotatsu.core.db.TABLE_MANGA_TAGS
+
+@Entity(
+	tableName = TABLE_MANGA_TAGS,
+	primaryKeys = ["manga_id", "tag_id"],
+	foreignKeys = [
+		ForeignKey(
+			entity = MangaEntity::class,
+			parentColumns = ["manga_id"],
+			childColumns = ["manga_id"],
+			onDelete = ForeignKey.CASCADE,
+		),
+		ForeignKey(
+			entity = TagEntity::class,
+			parentColumns = ["tag_id"],
+			childColumns = ["tag_id"],
+			onDelete = ForeignKey.CASCADE,
+		)
+	]
+)
+class MangaTagsEntity(
+	@ColumnInfo(name = "manga_id", index = true) val mangaId: Long,
+	@ColumnInfo(name = "tag_id", index = true) val tagId: Long,
+)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaWithTags.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaWithTags.kt
@@ -0,0 +1,34 @@
+package org.koitharu.kotatsu.core.db.entity
+
+import androidx.room.Embedded
+import androidx.room.Junction
+import androidx.room.Relation
+
+class MangaWithTags(
+	@Embedded val manga: MangaEntity,
+	@Relation(
+		parentColumn = "manga_id",
+		entityColumn = "tag_id",
+		associateBy = Junction(MangaTagsEntity::class)
+	)
+	val tags: List<TagEntity>,
+) {
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+
+		other as MangaWithTags
+
+		if (manga != other.manga) return false
+		if (tags != other.tags) return false
+
+		return true
+	}
+
+	override fun hashCode(): Int {
+		var result = manga.hashCode()
+		result = 31 * result + tags.hashCode()
+		return result
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/TagEntity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/TagEntity.kt
@@ -0,0 +1,15 @@
+package org.koitharu.kotatsu.core.db.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.koitharu.kotatsu.core.db.TABLE_TAGS
+
+@Entity(tableName = TABLE_TAGS)
+data class TagEntity(
+	@PrimaryKey(autoGenerate = false)
+	@ColumnInfo(name = "tag_id") val id: Long,
+	@ColumnInfo(name = "title") val title: String,
+	@ColumnInfo(name = "key") val key: String,
+	@ColumnInfo(name = "source") val source: String,
+)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration10To11.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration10To11.kt
@@ -0,0 +1,26 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration10To11 : Migration(10, 11) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL(
+			"""
+			CREATE TABLE IF NOT EXISTS `bookmarks` (
+				`manga_id` INTEGER NOT NULL,
+				`page_id` INTEGER NOT NULL,
+				`chapter_id` INTEGER NOT NULL, 
+				`page` INTEGER NOT NULL,
+				`scroll` INTEGER NOT NULL,
+				`image` TEXT NOT NULL,
+				`created_at` INTEGER NOT NULL,
+				PRIMARY KEY(`manga_id`, `page_id`),
+				FOREIGN KEY(`manga_id`) REFERENCES `manga`(`manga_id`) ON UPDATE NO ACTION ON DELETE CASCADE )
+			""".trimIndent()
+		)
+		database.execSQL("CREATE INDEX IF NOT EXISTS `index_bookmarks_manga_id` ON `bookmarks` (`manga_id`)")
+		database.execSQL("CREATE INDEX IF NOT EXISTS `index_bookmarks_page_id` ON `bookmarks` (`page_id`)")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration11To12.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration11To12.kt
@@ -0,0 +1,27 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration11To12 : Migration(11, 12) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL(
+			"""
+			CREATE TABLE IF NOT EXISTS `scrobblings` (
+				`scrobbler` INTEGER NOT NULL,
+				`id` INTEGER NOT NULL,
+				`manga_id` INTEGER NOT NULL,
+				`target_id` INTEGER NOT NULL, 
+				`status` TEXT,
+				`chapter` INTEGER NOT NULL, 
+				`comment` TEXT,
+				`rating` REAL NOT NULL,
+				PRIMARY KEY(`scrobbler`, `id`, `manga_id`)
+			)
+			""".trimIndent()
+		)
+		database.execSQL("ALTER TABLE history ADD COLUMN `percent` REAL NOT NULL DEFAULT -1")
+		database.execSQL("ALTER TABLE bookmarks ADD COLUMN `percent` REAL NOT NULL DEFAULT -1")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration12To13.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration12To13.kt
@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration12To13 : Migration(12, 13) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE favourite_categories ADD COLUMN `show_in_lib` INTEGER NOT NULL DEFAULT 1")
+		database.execSQL("ALTER TABLE favourites ADD COLUMN `sort_key` INTEGER NOT NULL DEFAULT 0")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration13To14.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration13To14.kt
@@ -0,0 +1,13 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration13To14 : Migration(13, 14) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE favourite_categories ADD COLUMN `deleted_at` INTEGER NOT NULL DEFAULT 0")
+		database.execSQL("ALTER TABLE favourites ADD COLUMN `deleted_at` INTEGER NOT NULL DEFAULT 0")
+		database.execSQL("ALTER TABLE history ADD COLUMN `deleted_at` INTEGER NOT NULL DEFAULT 0")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration14To15.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration14To15.kt
@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration14To15 : Migration(14, 15) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE preferences ADD COLUMN `cf_brightness` REAL NOT NULL DEFAULT 0")
+		database.execSQL("ALTER TABLE preferences ADD COLUMN `cf_contrast` REAL NOT NULL DEFAULT 0")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration1To2.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration1To2.kt
@@ -0,0 +1,54 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration1To2 : Migration(1, 2) {
+	/**
+	 * Adding foreign keys
+	 */
+	override fun migrate(database: SupportSQLiteDatabase) {
+		/* manga_tags */
+		database.execSQL(
+			"CREATE TABLE IF NOT EXISTS manga_tags_tmp (manga_id INTEGER NOT NULL, tag_id INTEGER NOT NULL, " +
+					"PRIMARY KEY(manga_id, tag_id), " +
+					"FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE, " +
+					"FOREIGN KEY(tag_id) REFERENCES tags(tag_id) ON UPDATE NO ACTION ON DELETE CASCADE )"
+		)
+		database.execSQL("CREATE INDEX IF NOT EXISTS index_manga_tags_manga_id ON manga_tags_tmp (manga_id)")
+		database.execSQL("CREATE INDEX IF NOT EXISTS index_manga_tags_tag_id ON manga_tags_tmp (tag_id)")
+		database.execSQL("INSERT INTO manga_tags_tmp (manga_id, tag_id) SELECT manga_id, tag_id FROM manga_tags")
+		database.execSQL("DROP TABLE manga_tags")
+		database.execSQL("ALTER TABLE manga_tags_tmp RENAME TO manga_tags")
+		/* favourites */
+		database.execSQL(
+			"CREATE TABLE IF NOT EXISTS favourites_tmp (manga_id INTEGER NOT NULL, category_id INTEGER NOT NULL, created_at INTEGER NOT NULL, " +
+					"PRIMARY KEY(manga_id, category_id), " +
+					"FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE , " +
+					"FOREIGN KEY(category_id) REFERENCES favourite_categories(category_id) ON UPDATE NO ACTION ON DELETE CASCADE )"
+		)
+		database.execSQL("CREATE INDEX IF NOT EXISTS index_favourites_manga_id ON favourites_tmp (manga_id)")
+		database.execSQL("CREATE INDEX IF NOT EXISTS index_favourites_category_id ON favourites_tmp (category_id)")
+		database.execSQL("INSERT INTO favourites_tmp (manga_id, category_id, created_at) SELECT manga_id, category_id, created_at FROM favourites")
+		database.execSQL("DROP TABLE favourites")
+		database.execSQL("ALTER TABLE favourites_tmp RENAME TO favourites")
+		/* history */
+		database.execSQL(
+			"CREATE TABLE IF NOT EXISTS history_tmp (manga_id INTEGER NOT NULL, created_at INTEGER NOT NULL, updated_at INTEGER NOT NULL, chapter_id INTEGER NOT NULL, page INTEGER NOT NULL, " +
+					"PRIMARY KEY(manga_id), " +
+					"FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE )"
+		)
+		database.execSQL("INSERT INTO history_tmp (manga_id, created_at, updated_at, chapter_id, page) SELECT manga_id, created_at, updated_at, chapter_id, page FROM history")
+		database.execSQL("DROP TABLE history")
+		database.execSQL("ALTER TABLE history_tmp RENAME TO history")
+		/* preferences */
+		database.execSQL(
+			"CREATE TABLE IF NOT EXISTS preferences_tmp (manga_id INTEGER NOT NULL, mode INTEGER NOT NULL," +
+					" PRIMARY KEY(manga_id), " +
+					"FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE )"
+		)
+		database.execSQL("INSERT INTO preferences_tmp (manga_id, mode) SELECT manga_id, mode FROM preferences")
+		database.execSQL("DROP TABLE preferences")
+		database.execSQL("ALTER TABLE preferences_tmp RENAME TO preferences")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration2To3.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration2To3.kt
@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration2To3 : Migration(2, 3) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE history ADD COLUMN scroll REAL NOT NULL DEFAULT 0")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration3To4.kt
+++ b/app/src/main/kotlin/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
+
+class 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 )")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration4To5.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration4To5.kt
@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration4To5 : Migration(4, 5) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE favourite_categories ADD COLUMN sort_key INTEGER NOT NULL DEFAULT 0")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration5To6.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration5To6.kt
@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration5To6 : Migration(5, 6) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("CREATE TABLE IF NOT EXISTS track_logs (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, manga_id INTEGER NOT NULL, chapters TEXT NOT NULL, created_at INTEGER NOT NULL, FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE)")
+		database.execSQL("CREATE INDEX IF NOT EXISTS index_track_logs_manga_id ON track_logs (manga_id)")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration6To7.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration6To7.kt
@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration6To7 : Migration(6, 7) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE manga ADD COLUMN public_url TEXT NOT NULL DEFAULT ''")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration7To8.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration7To8.kt
@@ -0,0 +1,13 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration7To8 : Migration(7, 8) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE manga ADD COLUMN nsfw INTEGER NOT NULL DEFAULT 0")
+		database.execSQL("CREATE TABLE IF NOT EXISTS suggestions (manga_id INTEGER NOT NULL, relevance REAL NOT NULL, created_at INTEGER NOT NULL, PRIMARY KEY(manga_id), FOREIGN KEY(manga_id) REFERENCES manga(manga_id) ON UPDATE NO ACTION ON DELETE CASCADE )")
+		database.execSQL("CREATE INDEX IF NOT EXISTS index_suggestions_manga_id ON suggestions (manga_id)")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration8To9.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration8To9.kt
@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+import org.koitharu.kotatsu.parsers.model.SortOrder
+
+class Migration8To9 : Migration(8, 9) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE favourite_categories ADD COLUMN `order` TEXT NOT NULL DEFAULT ${SortOrder.NEWEST.name}")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration9To10.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration9To10.kt
@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration9To10 : Migration(9, 10) {
+
+	override fun migrate(database: SupportSQLiteDatabase) {
+		database.execSQL("ALTER TABLE favourite_categories ADD COLUMN `track` INTEGER NOT NULL DEFAULT 1")
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CaughtException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CaughtException.kt
@@ -0,0 +1,3 @@
+package org.koitharu.kotatsu.core.exceptions
+
+class CaughtException(cause: Throwable, override val message: String?) : RuntimeException(cause)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CloudFlareProtectedException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CloudFlareProtectedException.kt
@@ -0,0 +1,9 @@
+package org.koitharu.kotatsu.core.exceptions
+
+import okhttp3.Headers
+import okio.IOException
+
+class CloudFlareProtectedException(
+	val url: String,
+	@Transient val headers: Headers,
+) : IOException("Protected by CloudFlare")
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CompositeException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/CompositeException.kt
@@ -0,0 +1,8 @@
+package org.koitharu.kotatsu.core.exceptions
+
+import org.koitharu.kotatsu.parsers.util.mapNotNullToSet
+
+class CompositeException(val errors: Collection<Throwable>) : Exception() {
+
+	override val message: String = errors.mapNotNullToSet { it.message }.joinToString()
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/EmptyHistoryException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/EmptyHistoryException.kt
@@ -0,0 +1,3 @@
+package org.koitharu.kotatsu.core.exceptions
+
+class EmptyHistoryException : RuntimeException()
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/SyncApiException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/SyncApiException.kt
@@ -0,0 +1,6 @@
+package org.koitharu.kotatsu.core.exceptions
+
+class SyncApiException(
+	message: String,
+	val code: Int,
+) : RuntimeException(message)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/UnsupportedFileException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/UnsupportedFileException.kt
@@ -0,0 +1,5 @@
+package org.koitharu.kotatsu.core.exceptions
+
+import java.io.IOException
+
+class UnsupportedFileException(message: String? = null) : IOException(message)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/WrongPasswordException.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/WrongPasswordException.kt
@@ -0,0 +1,3 @@
+package org.koitharu.kotatsu.core.exceptions
+
+class WrongPasswordException : IllegalArgumentException()
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/DialogErrorObserver.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/DialogErrorObserver.kt
@@ -0,0 +1,66 @@
+package org.koitharu.kotatsu.core.exceptions.resolve
+
+import android.content.DialogInterface
+import android.view.View
+import androidx.core.util.Consumer
+import androidx.fragment.app.Fragment
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.ui.dialog.ErrorDetailsDialog
+import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
+import org.koitharu.kotatsu.parsers.exception.ParseException
+
+class DialogErrorObserver(
+	host: View,
+	fragment: Fragment?,
+	resolver: ExceptionResolver?,
+	private val onResolved: Consumer<Boolean>?,
+) : ErrorObserver(host, fragment, resolver, onResolved) {
+
+	constructor(
+		host: View,
+		fragment: Fragment?,
+	) : this(host, fragment, null, null)
+
+	override fun onChanged(value: Throwable?) {
+		if (value == null) {
+			return
+		}
+		val listener = DialogListener(value)
+		val dialogBuilder = MaterialAlertDialogBuilder(activity ?: host.context)
+			.setMessage(value.getDisplayMessage(host.context.resources))
+			.setNegativeButton(R.string.close, listener)
+			.setOnCancelListener(listener)
+		if (canResolve(value)) {
+			dialogBuilder.setPositiveButton(ExceptionResolver.getResolveStringId(value), listener)
+		} else if (value is ParseException) {
+			val fm = fragmentManager
+			if (fm != null) {
+				dialogBuilder.setPositiveButton(R.string.details) { _, _ ->
+					ErrorDetailsDialog.show(fm, value, value.url)
+				}
+			}
+		}
+		val dialog = dialogBuilder.create()
+		if (activity != null) {
+			dialog.setOwnerActivity(activity)
+		}
+		dialog.show()
+	}
+
+	private inner class DialogListener(
+		private val error: Throwable,
+	) : DialogInterface.OnClickListener, DialogInterface.OnCancelListener {
+
+		override fun onClick(dialog: DialogInterface?, which: Int) {
+			when (which) {
+				DialogInterface.BUTTON_NEGATIVE -> onResolved?.accept(false)
+				DialogInterface.BUTTON_POSITIVE -> resolve(error)
+			}
+		}
+
+		override fun onCancel(dialog: DialogInterface?) {
+			onResolved?.accept(false)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/ErrorObserver.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/ErrorObserver.kt
@@ -0,0 +1,44 @@
+package org.koitharu.kotatsu.core.exceptions.resolve
+
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.util.Consumer
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import androidx.lifecycle.LifecycleCoroutineScope
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.Observer
+import androidx.lifecycle.coroutineScope
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import org.koitharu.kotatsu.core.util.ext.findActivity
+import org.koitharu.kotatsu.core.util.ext.viewLifecycleScope
+
+abstract class ErrorObserver(
+	protected val host: View,
+	protected val fragment: Fragment?,
+	private val resolver: ExceptionResolver?,
+	private val onResolved: Consumer<Boolean>?,
+) : Observer<Throwable?> {
+
+	protected val activity = host.context.findActivity()
+
+	private val lifecycleScope: LifecycleCoroutineScope
+		get() = checkNotNull(fragment?.viewLifecycleScope ?: (activity as? LifecycleOwner)?.lifecycle?.coroutineScope)
+
+	protected val fragmentManager: FragmentManager?
+		get() = fragment?.childFragmentManager ?: (activity as? AppCompatActivity)?.supportFragmentManager
+
+	protected fun canResolve(error: Throwable): Boolean {
+		return resolver != null && ExceptionResolver.canResolve(error)
+	}
+
+	protected fun resolve(error: Throwable) {
+		lifecycleScope.launch {
+			val isResolved = resolver?.resolve(error) ?: false
+			if (isActive) {
+				onResolved?.accept(isResolved)
+			}
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/ExceptionResolver.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/ExceptionResolver.kt
@@ -0,0 +1,103 @@
+package org.koitharu.kotatsu.core.exceptions.resolve
+
+import androidx.activity.result.ActivityResultCallback
+import androidx.activity.result.ActivityResultLauncher
+import androidx.annotation.StringRes
+import androidx.collection.ArrayMap
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
+import kotlinx.coroutines.suspendCancellableCoroutine
+import okhttp3.Headers
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.browser.BrowserActivity
+import org.koitharu.kotatsu.browser.cloudflare.CloudFlareDialog
+import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
+import org.koitharu.kotatsu.core.ui.dialog.ErrorDetailsDialog
+import org.koitharu.kotatsu.core.util.TaggedActivityResult
+import org.koitharu.kotatsu.core.util.isSuccess
+import org.koitharu.kotatsu.parsers.exception.AuthRequiredException
+import org.koitharu.kotatsu.parsers.exception.NotFoundException
+import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.settings.sources.auth.SourceAuthActivity
+import kotlin.coroutines.Continuation
+import kotlin.coroutines.resume
+import kotlin.coroutines.suspendCoroutine
+
+class ExceptionResolver private constructor(
+	private val activity: FragmentActivity?,
+	private val fragment: Fragment?,
+) : ActivityResultCallback<TaggedActivityResult> {
+
+	private val continuations = ArrayMap<String, Continuation<Boolean>>(1)
+	private lateinit var sourceAuthContract: ActivityResultLauncher<MangaSource>
+
+	constructor(activity: FragmentActivity) : this(activity = activity, fragment = null) {
+		sourceAuthContract = activity.registerForActivityResult(SourceAuthActivity.Contract(), this)
+	}
+
+	constructor(fragment: Fragment) : this(activity = null, fragment = fragment) {
+		sourceAuthContract = fragment.registerForActivityResult(SourceAuthActivity.Contract(), this)
+	}
+
+	override fun onActivityResult(result: TaggedActivityResult) {
+		continuations.remove(result.tag)?.resume(result.isSuccess)
+	}
+
+	fun showDetails(e: Throwable, url: String?) {
+		ErrorDetailsDialog.show(getFragmentManager(), e, url)
+	}
+
+	suspend fun resolve(e: Throwable): Boolean = when (e) {
+		is CloudFlareProtectedException -> resolveCF(e.url, e.headers)
+		is AuthRequiredException -> resolveAuthException(e.source)
+		is NotFoundException -> {
+			openInBrowser(e.url)
+			false
+		}
+
+		else -> false
+	}
+
+	private suspend fun resolveCF(url: String, headers: Headers): Boolean {
+		val dialog = CloudFlareDialog.newInstance(url, headers)
+		val fm = getFragmentManager()
+		return suspendCancellableCoroutine { cont ->
+			fm.clearFragmentResult(CloudFlareDialog.TAG)
+			continuations[CloudFlareDialog.TAG] = cont
+			fm.setFragmentResultListener(CloudFlareDialog.TAG, checkNotNull(fragment ?: activity)) { key, result ->
+				continuations.remove(key)?.resume(result.getBoolean(CloudFlareDialog.EXTRA_RESULT))
+			}
+			dialog.show(fm, CloudFlareDialog.TAG)
+			cont.invokeOnCancellation {
+				continuations.remove(CloudFlareDialog.TAG, cont)
+				fm.clearFragmentResultListener(CloudFlareDialog.TAG)
+				dialog.dismissAllowingStateLoss()
+			}
+		}
+	}
+
+	private suspend fun resolveAuthException(source: MangaSource): Boolean = suspendCoroutine { cont ->
+		continuations[SourceAuthActivity.TAG] = cont
+		sourceAuthContract.launch(source)
+	}
+
+	private fun openInBrowser(url: String) {
+		val context = activity ?: fragment?.activity ?: return
+		context.startActivity(BrowserActivity.newIntent(context, url, null))
+	}
+
+	private fun getFragmentManager() = checkNotNull(fragment?.childFragmentManager ?: activity?.supportFragmentManager)
+
+	companion object {
+
+		@StringRes
+		fun getResolveStringId(e: Throwable) = when (e) {
+			is CloudFlareProtectedException -> R.string.captcha_solve
+			is AuthRequiredException -> R.string.sign_in
+			is NotFoundException -> if (e.url.isNotEmpty()) R.string.open_in_browser else 0
+			else -> 0
+		}
+
+		fun canResolve(e: Throwable) = getResolveStringId(e) != 0
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/SnackbarErrorObserver.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/exceptions/resolve/SnackbarErrorObserver.kt
@@ -0,0 +1,47 @@
+package org.koitharu.kotatsu.core.exceptions.resolve
+
+import android.view.View
+import androidx.core.util.Consumer
+import androidx.fragment.app.Fragment
+import com.google.android.material.snackbar.Snackbar
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.ui.dialog.ErrorDetailsDialog
+import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
+import org.koitharu.kotatsu.main.ui.owners.BottomNavOwner
+import org.koitharu.kotatsu.parsers.exception.ParseException
+
+class SnackbarErrorObserver(
+	host: View,
+	fragment: Fragment?,
+	resolver: ExceptionResolver?,
+	onResolved: Consumer<Boolean>?,
+) : ErrorObserver(host, fragment, resolver, onResolved) {
+
+	constructor(
+		host: View,
+		fragment: Fragment?,
+	) : this(host, fragment, null, null)
+
+	override fun onChanged(value: Throwable?) {
+		if (value == null) {
+			return
+		}
+		val snackbar = Snackbar.make(host, value.getDisplayMessage(host.context.resources), Snackbar.LENGTH_SHORT)
+		if (activity is BottomNavOwner) {
+			snackbar.anchorView = activity.bottomNav
+		}
+		if (canResolve(value)) {
+			snackbar.setAction(ExceptionResolver.getResolveStringId(value)) {
+				resolve(value)
+			}
+		} else if (value is ParseException) {
+			val fm = fragmentManager
+			if (fm != null) {
+				snackbar.setAction(R.string.details) {
+					ErrorDetailsDialog.show(fm, value, value.url)
+				}
+			}
+		}
+		snackbar.show()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/github/AppUpdateRepository.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/github/AppUpdateRepository.kt
@@ -0,0 +1,123 @@
+package org.koitharu.kotatsu.core.github
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.pm.PackageManager
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.withContext
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import org.json.JSONArray
+import org.json.JSONObject
+import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.core.network.BaseHttpClient
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.ext.asArrayList
+import org.koitharu.kotatsu.parsers.util.await
+import org.koitharu.kotatsu.parsers.util.byte2HexFormatted
+import org.koitharu.kotatsu.parsers.util.json.mapJSONNotNull
+import org.koitharu.kotatsu.parsers.util.parseJsonArray
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import org.koitharu.kotatsu.util.ext.printStackTraceDebug
+import java.io.ByteArrayInputStream
+import java.io.InputStream
+import java.security.MessageDigest
+import java.security.cert.CertificateFactory
+import java.security.cert.X509Certificate
+import javax.inject.Inject
+import javax.inject.Singleton
+
+private const val CERT_SHA1 = "2C:19:C7:E8:07:61:2B:8E:94:51:1B:FD:72:67:07:64:5D:C2:58:AE"
+private const val CONTENT_TYPE_APK = "application/vnd.android.package-archive"
+
+@Singleton
+class AppUpdateRepository @Inject constructor(
+	@ApplicationContext private val context: Context,
+	private val settings: AppSettings,
+	@BaseHttpClient private val okHttp: OkHttpClient,
+) {
+
+	private val availableUpdate = MutableStateFlow<AppVersion?>(null)
+
+	fun observeAvailableUpdate() = availableUpdate.asStateFlow()
+
+	suspend fun getAvailableVersions(): List<AppVersion> {
+		val request = Request.Builder()
+			.get()
+			.url("https://api.github.com/repos/KotatsuApp/Kotatsu/releases?page=1&per_page=10")
+		val jsonArray = okHttp.newCall(request.build()).await().parseJsonArray()
+		return jsonArray.mapJSONNotNull { json ->
+			val asset = json.optJSONArray("assets")?.find { jo ->
+				jo.optString("content_type") == CONTENT_TYPE_APK
+			} ?: return@mapJSONNotNull null
+			AppVersion(
+				id = json.getLong("id"),
+				url = json.getString("html_url"),
+				name = json.getString("name").removePrefix("v"),
+				apkSize = asset.getLong("size"),
+				apkUrl = asset.getString("browser_download_url"),
+				description = json.getString("body"),
+			)
+		}
+	}
+
+	suspend fun fetchUpdate(): AppVersion? = withContext(Dispatchers.Default) {
+		if (!isUpdateSupported()) {
+			return@withContext null
+		}
+		runCatchingCancellable {
+			val currentVersion = VersionId(BuildConfig.VERSION_NAME)
+			val available = getAvailableVersions().asArrayList()
+			available.sortBy { it.versionId }
+			if (currentVersion.isStable && !settings.isUnstableUpdatesAllowed) {
+				available.retainAll { it.versionId.isStable }
+			}
+			available.maxByOrNull { it.versionId }
+				?.takeIf { it.versionId > currentVersion }
+		}.onFailure {
+			it.printStackTraceDebug()
+		}.onSuccess {
+			availableUpdate.value = it
+		}.getOrNull()
+	}
+
+	fun isUpdateSupported(): Boolean {
+		return BuildConfig.DEBUG || getCertificateSHA1Fingerprint() == CERT_SHA1
+	}
+
+	suspend fun getCurrentVersionChangelog(): String? {
+		val currentVersion = VersionId(BuildConfig.VERSION_NAME)
+		val available = getAvailableVersions()
+		return available.find { x -> x.versionId == currentVersion }?.description
+	}
+
+	@Suppress("DEPRECATION")
+	@SuppressLint("PackageManagerGetSignatures")
+	private fun getCertificateSHA1Fingerprint(): String? = runCatching {
+		val packageInfo = context.packageManager.getPackageInfo(context.packageName, PackageManager.GET_SIGNATURES)
+		val signatures = requireNotNull(packageInfo?.signatures)
+		val cert: ByteArray = signatures.first().toByteArray()
+		val input: InputStream = ByteArrayInputStream(cert)
+		val cf = CertificateFactory.getInstance("X509")
+		val c = cf.generateCertificate(input) as X509Certificate
+		val md: MessageDigest = MessageDigest.getInstance("SHA1")
+		val publicKey: ByteArray = md.digest(c.encoded)
+		return publicKey.byte2HexFormatted()
+	}.onFailure { error ->
+		error.printStackTraceDebug()
+	}.getOrNull()
+
+	private inline fun JSONArray.find(predicate: (JSONObject) -> Boolean): JSONObject? {
+		val size = length()
+		for (i in 0 until size) {
+			val jo = getJSONObject(i)
+			if (predicate(jo)) {
+				return jo
+			}
+		}
+		return null
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/github/AppVersion.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/github/AppVersion.kt
@@ -0,0 +1,19 @@
+package org.koitharu.kotatsu.core.github
+
+import android.os.Parcelable
+import kotlinx.parcelize.IgnoredOnParcel
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+data class AppVersion(
+	val id: Long,
+	val name: String,
+	val url: String,
+	val apkSize: Long,
+	val apkUrl: String,
+	val description: String,
+) : Parcelable {
+
+	@IgnoredOnParcel
+	val versionId = VersionId(name)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/github/VersionId.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/github/VersionId.kt
@@ -0,0 +1,79 @@
+package org.koitharu.kotatsu.core.github
+
+import java.util.*
+
+class VersionId(
+	val major: Int,
+	val minor: Int,
+	val build: Int,
+	val variantType: String,
+	val variantNumber: Int,
+) : Comparable<VersionId> {
+
+	override fun compareTo(other: VersionId): Int {
+		var diff = major.compareTo(other.major)
+		if (diff != 0) {
+			return diff
+		}
+		diff = minor.compareTo(other.minor)
+		if (diff != 0) {
+			return diff
+		}
+		diff = build.compareTo(other.build)
+		if (diff != 0) {
+			return diff
+		}
+		diff = variantWeight(variantType).compareTo(variantWeight(other.variantType))
+		if (diff != 0) {
+			return diff
+		}
+		return variantNumber.compareTo(other.variantNumber)
+	}
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+
+		other as VersionId
+
+		if (major != other.major) return false
+		if (minor != other.minor) return false
+		if (build != other.build) return false
+		if (variantType != other.variantType) return false
+		if (variantNumber != other.variantNumber) return false
+
+		return true
+	}
+
+	override fun hashCode(): Int {
+		var result = major
+		result = 31 * result + minor
+		result = 31 * result + build
+		result = 31 * result + variantType.hashCode()
+		result = 31 * result + variantNumber
+		return result
+	}
+
+	private fun variantWeight(variantType: String) = when (variantType.lowercase(Locale.ROOT)) {
+		"a", "alpha" -> 1
+		"b", "beta" -> 2
+		"rc" -> 4
+		"" -> 8
+		else -> 0
+	}
+}
+
+val VersionId.isStable: Boolean
+	get() = variantType.isEmpty()
+
+fun VersionId(versionName: String): VersionId {
+	val parts = versionName.substringBeforeLast('-').split('.')
+	val variant = versionName.substringAfterLast('-', "")
+	return VersionId(
+		major = parts.getOrNull(0)?.toIntOrNull() ?: 0,
+		minor = parts.getOrNull(1)?.toIntOrNull() ?: 0,
+		build = parts.getOrNull(2)?.toIntOrNull() ?: 0,
+		variantType = variant.filter(Char::isLetter),
+		variantNumber = variant.filter(Char::isDigit).toIntOrNull() ?: 0,
+	)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/logs/FileLogger.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/logs/FileLogger.kt
@@ -0,0 +1,151 @@
+package org.koitharu.kotatsu.core.logs
+
+import android.content.Context
+import androidx.annotation.WorkerThread
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.cancelAndJoin
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.runInterruptible
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.withContext
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
+import org.koitharu.kotatsu.core.util.ext.subdir
+import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
+import org.koitharu.kotatsu.util.ext.printStackTraceDebug
+import java.io.File
+import java.io.FileOutputStream
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import java.util.concurrent.ConcurrentLinkedQueue
+
+private const val DIR = "logs"
+private const val FLUSH_DELAY = 2_000L
+private const val MAX_SIZE_BYTES = 1024 * 1024 // 1 MB
+
+class FileLogger(
+	context: Context,
+	private val settings: AppSettings,
+	name: String,
+) {
+
+	val file by lazy {
+		val dir = context.getExternalFilesDir(DIR) ?: context.filesDir.subdir(DIR)
+		File(dir, "$name.log")
+	}
+	val isEnabled: Boolean
+		get() = settings.isLoggingEnabled
+	private val dateFormat = SimpleDateFormat.getDateTimeInstance(
+		SimpleDateFormat.SHORT,
+		SimpleDateFormat.SHORT,
+		Locale.ROOT,
+	)
+	private val buffer = ConcurrentLinkedQueue<String>()
+	private val mutex = Mutex()
+	private var flushJob: Job? = null
+
+	fun log(message: String, e: Throwable? = null) {
+		if (!isEnabled) {
+			return
+		}
+		val text = buildString {
+			append(dateFormat.format(Date()))
+			append(": ")
+			if (e != null) {
+				append("E!")
+			}
+			append(message)
+			if (e != null) {
+				append(' ')
+				append(e.stackTraceToString())
+				appendLine()
+			}
+		}
+		buffer.add(text)
+		postFlush()
+	}
+
+	inline fun log(messageProducer: () -> String) {
+		if (isEnabled) {
+			log(messageProducer())
+		}
+	}
+
+	suspend fun flush() {
+		if (!isEnabled) {
+			return
+		}
+		flushJob?.cancelAndJoin()
+		flushImpl()
+	}
+
+	@WorkerThread
+	fun flushBlocking() {
+		if (!isEnabled) {
+			return
+		}
+		runBlockingSafe { flushJob?.cancelAndJoin() }
+		runBlockingSafe { flushImpl() }
+	}
+
+	private fun postFlush() {
+		if (flushJob?.isActive == true) {
+			return
+		}
+		flushJob = processLifecycleScope.launch(Dispatchers.Default) {
+			delay(FLUSH_DELAY)
+			runCatchingCancellable {
+				flushImpl()
+			}.onFailure {
+				it.printStackTraceDebug()
+			}
+		}
+	}
+
+	private suspend fun flushImpl() = withContext(NonCancellable) {
+		mutex.withLock {
+			if (buffer.isEmpty()) {
+				return@withContext
+			}
+			runInterruptible(Dispatchers.IO) {
+				if (file.length() > MAX_SIZE_BYTES) {
+					rotate()
+				}
+				FileOutputStream(file, true).use {
+					while (true) {
+						val message = buffer.poll() ?: break
+						it.write(message.toByteArray())
+						it.write('\n'.code)
+					}
+					it.flush()
+				}
+			}
+		}
+	}
+
+	@WorkerThread
+	private fun rotate() {
+		val length = file.length()
+		val bakFile = File(file.parentFile, file.name + ".bak")
+		file.renameTo(bakFile)
+		bakFile.inputStream().use { input ->
+			input.skip(length - MAX_SIZE_BYTES / 2)
+			file.outputStream().use { output ->
+				input.copyTo(output)
+				output.flush()
+			}
+		}
+		bakFile.delete()
+	}
+
+	private inline fun runBlockingSafe(crossinline block: suspend () -> Unit) = try {
+		runBlocking(NonCancellable) { block() }
+	} catch (_: InterruptedException) {
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/logs/Loggers.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/logs/Loggers.kt
@@ -0,0 +1,11 @@
+package org.koitharu.kotatsu.core.logs
+
+import javax.inject.Qualifier
+
+@Qualifier
+@Retention(AnnotationRetention.BINARY)
+annotation class TrackerLogger
+
+@Qualifier
+@Retention(AnnotationRetention.BINARY)
+annotation class SyncLogger
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/logs/LoggersModule.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/logs/LoggersModule.kt
@@ -0,0 +1,40 @@
+package org.koitharu.kotatsu.core.logs
+
+import android.content.Context
+import androidx.collection.arraySetOf
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import dagger.multibindings.ElementsIntoSet
+import org.koitharu.kotatsu.core.prefs.AppSettings
+
+@Module
+@InstallIn(SingletonComponent::class)
+object LoggersModule {
+
+	@Provides
+	@TrackerLogger
+	fun provideTrackerLogger(
+		@ApplicationContext context: Context,
+		settings: AppSettings,
+	) = FileLogger(context, settings, "tracker")
+
+	@Provides
+	@SyncLogger
+	fun provideSyncLogger(
+		@ApplicationContext context: Context,
+		settings: AppSettings,
+	) = FileLogger(context, settings, "sync")
+
+	@Provides
+	@ElementsIntoSet
+	fun provideAllLoggers(
+		@TrackerLogger trackerLogger: FileLogger,
+		@SyncLogger syncLogger: FileLogger,
+	): Set<@JvmSuppressWildcards FileLogger> = arraySetOf(
+		trackerLogger,
+		syncLogger,
+	)
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/FavouriteCategory.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/FavouriteCategory.kt
@@ -0,0 +1,17 @@
+package org.koitharu.kotatsu.core.model
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+import org.koitharu.kotatsu.parsers.model.SortOrder
+import java.util.*
+
+@Parcelize
+data class FavouriteCategory(
+	val id: Long,
+	val title: String,
+	val sortKey: Int,
+	val order: SortOrder,
+	val createdAt: Date,
+	val isTrackingEnabled: Boolean,
+	val isVisibleInLibrary: Boolean,
+) : Parcelable
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/Manga.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/Manga.kt
@@ -0,0 +1,56 @@
+package org.koitharu.kotatsu.core.model
+
+import androidx.core.os.LocaleListCompat
+import org.koitharu.kotatsu.core.util.ext.iterator
+import org.koitharu.kotatsu.details.ui.model.ChapterListItem
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaChapter
+import org.koitharu.kotatsu.parsers.util.mapToSet
+
+fun Collection<Manga>.ids() = mapToSet { it.id }
+
+fun Collection<Manga>.distinctById() = distinctBy { it.id }
+
+fun Collection<ChapterListItem>.countChaptersByBranch(): Int {
+	if (size <= 1) {
+		return size
+	}
+	val acc = HashMap<String?, Int>()
+	for (item in this) {
+		val branch = item.chapter.branch
+		acc[branch] = (acc[branch] ?: 0) + 1
+	}
+	return acc.values.max()
+}
+
+fun Manga.getPreferredBranch(history: MangaHistory?): String? {
+	val ch = chapters
+	if (ch.isNullOrEmpty()) {
+		return null
+	}
+	if (history != null) {
+		val currentChapter = ch.find { it.id == history.chapterId }
+		if (currentChapter != null) {
+			return currentChapter.branch
+		}
+	}
+	val groups = ch.groupBy { it.branch }
+	if (groups.size == 1) {
+		return groups.keys.first()
+	}
+	val candidates = HashMap<String?, List<MangaChapter>>(groups.size)
+	for (locale in LocaleListCompat.getAdjustedDefault()) {
+		val displayLanguage = locale.getDisplayLanguage(locale)
+		val displayName = locale.getDisplayName(locale)
+		for (branch in groups.keys) {
+			if (branch != null && (
+					branch.contains(displayLanguage, ignoreCase = true) ||
+						branch.contains(displayName, ignoreCase = true)
+					)
+			) {
+				candidates[branch] = groups[branch] ?: continue
+			}
+		}
+	}
+	return candidates.ifEmpty { groups }.maxByOrNull { it.value.size }?.key
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/MangaHistory.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/MangaHistory.kt
@@ -0,0 +1,15 @@
+package org.koitharu.kotatsu.core.model
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+import java.util.*
+
+@Parcelize
+data class MangaHistory(
+	val createdAt: Date,
+	val updatedAt: Date,
+	val chapterId: Long,
+	val page: Int,
+	val scroll: Int,
+	val percent: Float,
+) : Parcelable
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/MangaSource.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/MangaSource.kt
@@ -0,0 +1,17 @@
+package org.koitharu.kotatsu.core.model
+
+import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.toTitleCase
+import java.util.Locale
+
+fun MangaSource.getLocaleTitle(): String? {
+	val lc = Locale(locale ?: return null)
+	return lc.getDisplayLanguage(lc).toTitleCase(lc)
+}
+
+fun MangaSource(name: String): MangaSource {
+	MangaSource.values().forEach {
+		if (it.name == name) return it
+	}
+	return MangaSource.DUMMY
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/ZoomMode.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/ZoomMode.kt
@@ -0,0 +1,6 @@
+package org.koitharu.kotatsu.core.model
+
+enum class ZoomMode {
+
+	FIT_CENTER, FIT_HEIGHT, FIT_WIDTH, KEEP_START
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/Parcelable.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/Parcelable.kt
@@ -0,0 +1,98 @@
+package org.koitharu.kotatsu.core.model.parcelable
+
+import android.os.Parcel
+import androidx.core.os.ParcelCompat
+import org.koitharu.kotatsu.core.util.ext.readParcelableCompat
+import org.koitharu.kotatsu.core.util.ext.readSerializableCompat
+import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaChapter
+import org.koitharu.kotatsu.parsers.model.MangaPage
+import org.koitharu.kotatsu.parsers.model.MangaTag
+
+fun Manga.writeToParcel(out: Parcel, flags: Int, withChapters: Boolean) {
+	out.writeLong(id)
+	out.writeString(title)
+	out.writeString(altTitle)
+	out.writeString(url)
+	out.writeString(publicUrl)
+	out.writeFloat(rating)
+	ParcelCompat.writeBoolean(out, isNsfw)
+	out.writeString(coverUrl)
+	out.writeString(largeCoverUrl)
+	out.writeString(description)
+	out.writeParcelable(ParcelableMangaTags(tags), flags)
+	out.writeSerializable(state)
+	out.writeString(author)
+	if (withChapters) {
+		out.writeParcelable(chapters?.let(::ParcelableMangaChapters), flags)
+	} else {
+		out.writeString(null)
+	}
+	out.writeSerializable(source)
+}
+
+fun Parcel.readManga() = Manga(
+	id = readLong(),
+	title = requireNotNull(readString()),
+	altTitle = readString(),
+	url = requireNotNull(readString()),
+	publicUrl = requireNotNull(readString()),
+	rating = readFloat(),
+	isNsfw = ParcelCompat.readBoolean(this),
+	coverUrl = requireNotNull(readString()),
+	largeCoverUrl = readString(),
+	description = readString(),
+	tags = requireNotNull(readParcelableCompat<ParcelableMangaTags>()).tags,
+	state = readSerializableCompat(),
+	author = readString(),
+	chapters = readParcelableCompat<ParcelableMangaChapters>()?.chapters,
+	source = checkNotNull(readSerializableCompat()),
+)
+
+fun MangaPage.writeToParcel(out: Parcel) {
+	out.writeLong(id)
+	out.writeString(url)
+	out.writeString(preview)
+	out.writeSerializable(source)
+}
+
+fun Parcel.readMangaPage() = MangaPage(
+	id = readLong(),
+	url = requireNotNull(readString()),
+	preview = readString(),
+	source = checkNotNull(readSerializableCompat()),
+)
+
+fun MangaChapter.writeToParcel(out: Parcel) {
+	out.writeLong(id)
+	out.writeString(name)
+	out.writeInt(number)
+	out.writeString(url)
+	out.writeString(scanlator)
+	out.writeLong(uploadDate)
+	out.writeString(branch)
+	out.writeSerializable(source)
+}
+
+fun Parcel.readMangaChapter() = MangaChapter(
+	id = readLong(),
+	name = requireNotNull(readString()),
+	number = readInt(),
+	url = requireNotNull(readString()),
+	scanlator = readString(),
+	uploadDate = readLong(),
+	branch = readString(),
+	source = checkNotNull(readSerializableCompat()),
+)
+
+fun MangaTag.writeToParcel(out: Parcel) {
+	out.writeString(title)
+	out.writeString(key)
+	out.writeSerializable(source)
+}
+
+fun Parcel.readMangaTag() = MangaTag(
+	title = requireNotNull(readString()),
+	key = requireNotNull(readString()),
+	source = checkNotNull(readSerializableCompat()),
+)
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableManga.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableManga.kt
@@ -0,0 +1,53 @@
+package org.koitharu.kotatsu.core.model.parcelable
+
+import android.os.Parcel
+import android.os.Parcelable
+import org.koitharu.kotatsu.parsers.model.Manga
+
+// Limits to avoid TransactionTooLargeException
+private const val MAX_SAFE_SIZE = 1024 * 100 // Assume that 100 kb is safe parcel size
+private const val MAX_SAFE_CHAPTERS_COUNT = 24 // this is 100% safe
+
+class ParcelableManga(
+	val manga: Manga,
+	private val withChapters: Boolean,
+) : Parcelable {
+
+	constructor(parcel: Parcel) : this(parcel.readManga(), true)
+
+	override fun writeToParcel(parcel: Parcel, flags: Int) {
+		val chapters = manga.chapters
+		if (!withChapters || chapters == null) {
+			manga.writeToParcel(parcel, flags, withChapters = false)
+			return
+		}
+		if (chapters.size <= MAX_SAFE_CHAPTERS_COUNT) {
+			// fast path
+			manga.writeToParcel(parcel, flags, withChapters = true)
+			return
+		}
+		val tempParcel = Parcel.obtain()
+		manga.writeToParcel(tempParcel, flags, withChapters = true)
+		val size = tempParcel.dataSize()
+		if (size < MAX_SAFE_SIZE) {
+			parcel.appendFrom(tempParcel, 0, size)
+		} else {
+			manga.writeToParcel(parcel, flags, withChapters = false)
+		}
+		tempParcel.recycle()
+	}
+
+	override fun describeContents(): Int {
+		return 0
+	}
+
+	companion object CREATOR : Parcelable.Creator<ParcelableManga> {
+		override fun createFromParcel(parcel: Parcel): ParcelableManga {
+			return ParcelableManga(parcel)
+		}
+
+		override fun newArray(size: Int): Array<ParcelableManga?> {
+			return arrayOfNulls(size)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableMangaChapters.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableMangaChapters.kt
@@ -0,0 +1,35 @@
+package org.koitharu.kotatsu.core.model.parcelable
+
+import android.os.Parcel
+import android.os.Parcelable
+import org.koitharu.kotatsu.parsers.model.MangaChapter
+
+class ParcelableMangaChapters(
+	val chapters: List<MangaChapter>,
+) : Parcelable {
+
+	constructor(parcel: Parcel) : this(
+		List(parcel.readInt()) { parcel.readMangaChapter() }
+	)
+
+	override fun writeToParcel(parcel: Parcel, flags: Int) {
+		parcel.writeInt(chapters.size)
+		for (chapter in chapters) {
+			chapter.writeToParcel(parcel)
+		}
+	}
+
+	override fun describeContents(): Int {
+		return 0
+	}
+
+	companion object CREATOR : Parcelable.Creator<ParcelableMangaChapters> {
+		override fun createFromParcel(parcel: Parcel): ParcelableMangaChapters {
+			return ParcelableMangaChapters(parcel)
+		}
+
+		override fun newArray(size: Int): Array<ParcelableMangaChapters?> {
+			return arrayOfNulls(size)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableMangaPages.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableMangaPages.kt
@@ -0,0 +1,35 @@
+package org.koitharu.kotatsu.core.model.parcelable
+
+import android.os.Parcel
+import android.os.Parcelable
+import org.koitharu.kotatsu.parsers.model.MangaPage
+
+class ParcelableMangaPages(
+	val pages: List<MangaPage>,
+) : Parcelable {
+
+	constructor(parcel: Parcel) : this(
+		List(parcel.readInt()) { parcel.readMangaPage() }
+	)
+
+	override fun writeToParcel(parcel: Parcel, flags: Int) {
+		parcel.writeInt(pages.size)
+		for (page in pages) {
+			page.writeToParcel(parcel)
+		}
+	}
+
+	override fun describeContents(): Int {
+		return 0
+	}
+
+	companion object CREATOR : Parcelable.Creator<ParcelableMangaPages> {
+		override fun createFromParcel(parcel: Parcel): ParcelableMangaPages {
+			return ParcelableMangaPages(parcel)
+		}
+
+		override fun newArray(size: Int): Array<ParcelableMangaPages?> {
+			return arrayOfNulls(size)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableMangaTags.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/model/parcelable/ParcelableMangaTags.kt
@@ -0,0 +1,36 @@
+package org.koitharu.kotatsu.core.model.parcelable
+
+import android.os.Parcel
+import android.os.Parcelable
+import org.koitharu.kotatsu.core.util.ext.Set
+import org.koitharu.kotatsu.parsers.model.MangaTag
+
+class ParcelableMangaTags(
+	val tags: Set<MangaTag>,
+) : Parcelable {
+
+	constructor(parcel: Parcel) : this(
+		Set(parcel.readInt()) { parcel.readMangaTag() },
+	)
+
+	override fun writeToParcel(parcel: Parcel, flags: Int) {
+		parcel.writeInt(tags.size)
+		for (tag in tags) {
+			tag.writeToParcel(parcel)
+		}
+	}
+
+	override fun describeContents(): Int {
+		return 0
+	}
+
+	companion object CREATOR : Parcelable.Creator<ParcelableMangaTags> {
+		override fun createFromParcel(parcel: Parcel): ParcelableMangaTags {
+			return ParcelableMangaTags(parcel)
+		}
+
+		override fun newArray(size: Int): Array<ParcelableMangaTags?> {
+			return arrayOfNulls(size)
+		}
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/AppProxySelector.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/AppProxySelector.kt
@@ -0,0 +1,43 @@
+package org.koitharu.kotatsu.core.network
+
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.util.ext.printStackTraceDebug
+import java.io.IOException
+import java.net.InetSocketAddress
+import java.net.Proxy
+import java.net.ProxySelector
+import java.net.SocketAddress
+import java.net.URI
+
+class AppProxySelector(
+	private val settings: AppSettings,
+) : ProxySelector() {
+
+	private var cachedProxy: Proxy? = null
+
+	override fun select(uri: URI?): List<Proxy> {
+		return listOf(getProxy())
+	}
+
+	override fun connectFailed(uri: URI?, sa: SocketAddress?, ioe: IOException?) {
+		ioe?.printStackTraceDebug()
+	}
+
+	private fun getProxy(): Proxy {
+		val type = settings.proxyType
+		val address = settings.proxyAddress
+		val port = settings.proxyPort
+		if (type == Proxy.Type.DIRECT || address.isNullOrEmpty() || port == 0) {
+			return Proxy.NO_PROXY
+		}
+		cachedProxy?.let {
+			val addr = it.address() as? InetSocketAddress
+			if (addr != null && it.type() == type && addr.port == port && addr.hostString == address) {
+				return it
+			}
+		}
+		val proxy = Proxy(type, InetSocketAddress(address, port))
+		cachedProxy = proxy
+		return proxy
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CacheLimitInterceptor.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CacheLimitInterceptor.kt
@@ -0,0 +1,26 @@
+package org.koitharu.kotatsu.core.network
+
+import okhttp3.CacheControl
+import okhttp3.Interceptor
+import okhttp3.Response
+import java.util.concurrent.TimeUnit
+
+class CacheLimitInterceptor : Interceptor {
+
+	private val defaultMaxAge = TimeUnit.HOURS.toSeconds(1)
+	private val defaultCacheControl = CacheControl.Builder()
+		.maxAge(defaultMaxAge.toInt(), TimeUnit.SECONDS)
+		.build()
+		.toString()
+
+	override fun intercept(chain: Interceptor.Chain): Response {
+		val response = chain.proceed(chain.request())
+		val responseCacheControl = CacheControl.parse(response.headers)
+		if (responseCacheControl.noStore || responseCacheControl.maxAgeSeconds <= defaultMaxAge) {
+			return response
+		}
+		return response.newBuilder()
+			.header(CommonHeaders.CACHE_CONTROL, defaultCacheControl)
+			.build()
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CloudFlareInterceptor.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CloudFlareInterceptor.kt
@@ -0,0 +1,29 @@
+package org.koitharu.kotatsu.core.network
+
+import okhttp3.Interceptor
+import okhttp3.Response
+import okhttp3.internal.closeQuietly
+import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
+import java.net.HttpURLConnection.HTTP_FORBIDDEN
+import java.net.HttpURLConnection.HTTP_UNAVAILABLE
+
+private const val HEADER_SERVER = "Server"
+private const val SERVER_CLOUDFLARE = "cloudflare"
+
+class CloudFlareInterceptor : Interceptor {
+
+	override fun intercept(chain: Interceptor.Chain): Response {
+		val request = chain.request()
+		val response = chain.proceed(request)
+		if (response.code == HTTP_FORBIDDEN || response.code == HTTP_UNAVAILABLE) {
+			if (response.header(HEADER_SERVER)?.startsWith(SERVER_CLOUDFLARE) == true) {
+				response.closeQuietly()
+				throw CloudFlareProtectedException(
+					url = response.request.url.toString(),
+					headers = request.headers,
+				)
+			}
+		}
+		return response
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CommonHeaders.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CommonHeaders.kt
@@ -0,0 +1,20 @@
+package org.koitharu.kotatsu.core.network
+
+import okhttp3.CacheControl
+
+object CommonHeaders {
+
+	const val REFERER = "Referer"
+	const val USER_AGENT = "User-Agent"
+	const val ACCEPT = "Accept"
+	const val CONTENT_TYPE = "Content-Type"
+	const val CONTENT_DISPOSITION = "Content-Disposition"
+	const val COOKIE = "Cookie"
+	const val CONTENT_ENCODING = "Content-Encoding"
+	const val ACCEPT_ENCODING = "Accept-Encoding"
+	const val AUTHORIZATION = "Authorization"
+	const val CACHE_CONTROL = "Cache-Control"
+
+	val CACHE_CONTROL_NO_STORE: CacheControl
+		get() = CacheControl.Builder().noStore().build()
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CommonHeadersInterceptor.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/CommonHeadersInterceptor.kt
@@ -0,0 +1,87 @@
+package org.koitharu.kotatsu.core.network
+
+import android.os.Build
+import android.util.Log
+import dagger.Lazy
+import okhttp3.Headers
+import okhttp3.Interceptor
+import okhttp3.Request
+import okhttp3.Response
+import org.koitharu.kotatsu.BuildConfig
+import org.koitharu.kotatsu.core.parser.MangaRepository
+import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
+import org.koitharu.kotatsu.parsers.model.MangaSource
+import org.koitharu.kotatsu.parsers.util.mergeWith
+import org.koitharu.kotatsu.util.ext.printStackTraceDebug
+import java.net.IDN
+import java.util.Locale
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class CommonHeadersInterceptor @Inject constructor(
+	private val mangaRepositoryFactoryLazy: Lazy<MangaRepository.Factory>,
+) : Interceptor {
+
+	override fun intercept(chain: Interceptor.Chain): Response {
+		val request = chain.request()
+		val source = request.tag(MangaSource::class.java)
+		val repository = if (source != null) {
+			mangaRepositoryFactoryLazy.get().create(source) as? RemoteMangaRepository
+		} else {
+			if (BuildConfig.DEBUG) {
+				Log.w("Http", "Request without source tag: ${request.url}")
+			}
+			null
+		}
+		val headersBuilder = request.headers.newBuilder()
+		repository?.headers?.let {
+			headersBuilder.mergeWith(it, replaceExisting = false)
+		}
+		if (headersBuilder[CommonHeaders.USER_AGENT] == null) {
+			headersBuilder[CommonHeaders.USER_AGENT] = userAgentFallback
+		}
+		if (headersBuilder[CommonHeaders.REFERER] == null && repository != null) {
+			val idn = IDN.toASCII(repository.domain)
+			headersBuilder.trySet(CommonHeaders.REFERER, "https://$idn/")
+		}
+		val newRequest = request.newBuilder().headers(headersBuilder.build()).build()
+		return repository?.intercept(ProxyChain(chain, newRequest)) ?: chain.proceed(newRequest)
+	}
+
+	private fun Headers.Builder.trySet(name: String, value: String) = try {
+		set(name, value)
+	} catch (e: IllegalArgumentException) {
+		e.printStackTraceDebug()
+	}
+
+	private class ProxyChain(
+		private val delegate: Interceptor.Chain,
+		private val request: Request,
+	) : Interceptor.Chain by delegate {
+
+		override fun request(): Request = request
+	}
+
+	companion object {
+
+		val userAgentFallback
+			get() = "Kotatsu/%s (Android %s; %s; %s %s; %s)".format(
+				BuildConfig.VERSION_NAME,
+				Build.VERSION.RELEASE,
+				Build.MODEL,
+				Build.BRAND,
+				Build.DEVICE,
+				Locale.getDefault().language,
+			)
+
+		val userAgentChrome
+			get() = (
+				"Mozilla/5.0 (Linux; Android %s; %s) AppleWebKit/537.36 (KHTML, like Gecko) " +
+					"Chrome/100.0.4896.127 Mobile Safari/537.36"
+				).format(
+					Build.VERSION.RELEASE,
+					Build.MODEL,
+				)
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/DoHManager.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/DoHManager.kt
@@ -0,0 +1,94 @@
+package org.koitharu.kotatsu.core.network
+
+import okhttp3.Cache
+import okhttp3.Dns
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.OkHttpClient
+import okhttp3.dnsoverhttps.DnsOverHttps
+import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.util.ext.printStackTraceDebug
+import java.net.InetAddress
+import java.net.UnknownHostException
+
+class DoHManager(
+	cache: Cache,
+	private val settings: AppSettings,
+) : Dns {
+
+	private val bootstrapClient = OkHttpClient.Builder().cache(cache).build()
+
+	private var cachedDelegate: Dns? = null
+	private var cachedProvider: DoHProvider? = null
+
+	override fun lookup(hostname: String): List<InetAddress> {
+		return try {
+			getDelegate().lookup(hostname)
+		} catch (e: UnknownHostException) {
+			// fallback
+			Dns.SYSTEM.lookup(hostname)
+		}
+	}
+
+	@Synchronized
+	private fun getDelegate(): Dns {
+		var delegate = cachedDelegate
+		val provider = settings.dnsOverHttps
+		if (delegate == null || provider != cachedProvider) {
+			delegate = createDelegate(provider)
+			cachedDelegate = delegate
+			cachedProvider = provider
+		}
+		return delegate
+	}
+
+	private fun createDelegate(provider: DoHProvider): Dns = when (provider) {
+		DoHProvider.NONE -> Dns.SYSTEM
+		DoHProvider.GOOGLE -> DnsOverHttps.Builder().client(bootstrapClient)
+			.url("https://dns.google/dns-query".toHttpUrl())
+			.resolvePrivateAddresses(true)
+			.bootstrapDnsHosts(
+				listOfNotNull(
+					tryGetByIp("8.8.4.4"),
+					tryGetByIp("8.8.8.8"),
+					tryGetByIp("2001:4860:4860::8888"),
+					tryGetByIp("2001:4860:4860::8844"),
+				),
+			).build()
+
+		DoHProvider.CLOUDFLARE -> DnsOverHttps.Builder().client(bootstrapClient)
+			.url("https://cloudflare-dns.com/dns-query".toHttpUrl())
+			.resolvePrivateAddresses(true)
+			.bootstrapDnsHosts(
+				listOfNotNull(
+					tryGetByIp("162.159.36.1"),
+					tryGetByIp("162.159.46.1"),
+					tryGetByIp("1.1.1.1"),
+					tryGetByIp("1.0.0.1"),
+					tryGetByIp("162.159.132.53"),
+					tryGetByIp("2606:4700:4700::1111"),
+					tryGetByIp("2606:4700:4700::1001"),
+					tryGetByIp("2606:4700:4700::0064"),
+					tryGetByIp("2606:4700:4700::6400"),
+				),
+			).build()
+
+		DoHProvider.ADGUARD -> DnsOverHttps.Builder().client(bootstrapClient)
+			.url("https://dns-unfiltered.adguard.com/dns-query".toHttpUrl())
+			.resolvePrivateAddresses(true)
+			.bootstrapDnsHosts(
+				listOfNotNull(
+					tryGetByIp("94.140.14.140"),
+					tryGetByIp("94.140.14.141"),
+					tryGetByIp("2a10:50c0::1:ff"),
+					tryGetByIp("2a10:50c0::2:ff"),
+				),
+			).build()
+	}
+
+	private fun tryGetByIp(ip: String): InetAddress? = try {
+		InetAddress.getByName(ip)
+	} catch (e: UnknownHostException) {
+		e.printStackTraceDebug()
+		null
+	}
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/DoHProvider.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/DoHProvider.kt
@@ -0,0 +1,6 @@
+package org.koitharu.kotatsu.core.network
+
+enum class DoHProvider {
+
+	NONE, GOOGLE, CLOUDFLARE, ADGUARD
+}
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/network/GZipInterceptor.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/network/GZipInterceptor.kt
@@ -0,0 +1,14 @@
+package org.koitharu.kotatsu.core.network
+
+import okhttp3.Interceptor
+import okhttp3.Response
+import org.koitharu.kotatsu.core.network.CommonHeaders.CONTENT_ENCODING
+
+class GZipInterceptor : Interceptor {
+
+	override fun intercept(chain: Interceptor.Chain): Response {
+		val newRequest = chain.request().newBuilder()
+		newRequest.addHeader(CONTENT_ENCODING, "gzip")
+		return chain.proceed(newRequest.build())
+	}
+}
--- a/Show More
+++ b/Show More