Excluded tags and content rating in filter

app/build.gradle

@@ -82,7 +82,7 @@ afterEvaluate {
 }
 dependencies {
 	//noinspection GradleDependency
-	implementation('com.github.KotatsuApp:kotatsu-parsers:ea095084cc') {
+	implementation('com.github.KotatsuApp:kotatsu-parsers:b274b51699') {
 		exclude group: 'org.json', module: 'json'
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/browser/cloudflare/CaptchaNotifier.kt

@@ -13,6 +13,7 @@ import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
 import org.koitharu.kotatsu.core.util.ext.checkNotificationPermission
 import org.koitharu.kotatsu.parsers.model.ContentType
+import org.koitharu.kotatsu.parsers.model.MangaSource
 
 class CaptchaNotifier(
 	private val context: Context,
@@ -58,6 +59,10 @@ class CaptchaNotifier(
 		manager.notify(TAG, exception.source.hashCode(), notification)
 	}
 
+	fun dismiss(source: MangaSource) {
+		NotificationManagerCompat.from(context).cancel(TAG, source.hashCode())
+	}
+
 	override fun onError(request: ImageRequest, result: ErrorResult) {
 		super.onError(request, result)
 		val e = result.throwable

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

@@ -31,6 +31,16 @@ abstract class TagsDao {
 	)
 	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  
+		GROUP BY tags.title
+		ORDER BY COUNT(manga_id) ASC 
+		LIMIT :limit""",
+	)
+	abstract suspend fun findRareTags(source: String, limit: Int): List<TagEntity>
+
 	@Query(
 		"""SELECT tags.* FROM tags
 		LEFT JOIN manga_tags ON tags.tag_id = manga_tags.tag_id 

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

@@ -7,6 +7,7 @@ import androidx.core.os.LocaleListCompat
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.util.ext.iterator
 import org.koitharu.kotatsu.details.ui.model.ChapterListItem
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaSource
@@ -56,6 +57,14 @@ val MangaState.iconResId: Int
 		MangaState.UPCOMING -> materialR.drawable.ic_clock_black_24dp
 	}
 
+@get:StringRes
+val ContentRating.titleResId: Int
+	get() = when (this) {
+		ContentRating.SAFE -> R.string.rating_safe
+		ContentRating.SUGGESTIVE -> R.string.rating_suggestive
+		ContentRating.ADULT -> R.string.rating_adult
+	}
+
 fun Manga.findChapter(id: Long): MangaChapter? {
 	return chapters?.findById(id)
 }

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

@@ -5,6 +5,7 @@ import org.koitharu.kotatsu.core.cache.ContentCache
 import org.koitharu.kotatsu.core.network.MirrorSwitchInterceptor
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
@@ -28,10 +29,16 @@ interface MangaRepository {
 
 	val states: Set<MangaState>
 
+	val contentRatings: Set<ContentRating>
+
 	var defaultSortOrder: SortOrder
 
 	val isMultipleTagsSupported: Boolean
 
+	val isTagsExclusionSupported: Boolean
+
+	val isSearchSupported: Boolean
+
 	suspend fun getList(offset: Int, filter: MangaListFilter?): List<Manga>
 
 	suspend fun getDetails(manga: Manga): Manga

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

@@ -21,6 +21,7 @@ import org.koitharu.kotatsu.parsers.MangaParser
 import org.koitharu.kotatsu.parsers.MangaParserAuthProvider
 import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.exception.ParseException
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Favicons
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
@@ -49,6 +50,9 @@ class RemoteMangaRepository(
 	override val states: Set<MangaState>
 		get() = parser.availableStates
 
+	override val contentRatings: Set<ContentRating>
+		get() = parser.availableContentRating
+
 	override var defaultSortOrder: SortOrder
 		get() = getConfig().defaultSortOrder ?: sortOrders.first()
 		set(value) {
@@ -58,6 +62,12 @@ class RemoteMangaRepository(
 	override val isMultipleTagsSupported: Boolean
 		get() = parser.isMultipleTagsSupported
 
+	override val isSearchSupported: Boolean
+		get() = parser.isSearchSupported
+
+	override val isTagsExclusionSupported: Boolean
+		get() = parser.isTagsExclusionSupported
+
 	var domain: String
 		get() = parser.domain
 		set(value) {

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

@@ -76,12 +76,9 @@ class ExploreRepository @Inject constructor(
 		}
 		val list = repository.getList(
 			offset = 0,
-			filter = MangaListFilter.Advanced(
-				sortOrder = order,
-				tags = setOfNotNull(tag),
-				locale = null,
-				states = emptySet(),
-			),
+			filter = MangaListFilter.Advanced.Builder(order)
+				.tags(setOfNotNull(tag))
+				.build(),
 		).asArrayList()
 		if (settings.isSuggestionsExcludeNsfw) {
 			list.removeAll { it.isNsfw }

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

@@ -41,6 +41,7 @@ import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.list.ui.model.LoadingFooter
 import org.koitharu.kotatsu.list.ui.model.LoadingState
 import org.koitharu.kotatsu.list.ui.model.toErrorFooter
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
 import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
@@ -67,11 +68,28 @@ class FilterCoordinator @Inject constructor(
 	private val coroutineScope = lifecycle.lifecycleScope
 	private val repository = mangaRepositoryFactory.create(savedStateHandle.require(RemoteListFragment.ARG_SOURCE))
 	private val currentState = MutableStateFlow(
-		MangaListFilter.Advanced(repository.defaultSortOrder, emptySet(), null, emptySet()),
+		MangaListFilter.Advanced(
+			sortOrder = repository.defaultSortOrder,
+			tags = emptySet(),
+			tagsExclude = emptySet(),
+			locale = null,
+			states = emptySet(),
+			contentRating = emptySet(),
+		),
 	)
 	private val localTags = SuspendLazy {
 		dataRepository.findTags(repository.source)
 	}
+	private val tagsFlow = flow {
+		val localTags = localTags.get()
+		emit(PendingData(localTags, isLoading = true, error = null))
+		tryLoadTags()
+			.onSuccess { remoteTags ->
+				emit(PendingData(mergeTags(remoteTags, localTags), isLoading = false, error = null))
+			}.onFailure {
+				emit(PendingData(localTags, isLoading = false, error = it))
+			}
+	}.stateIn(coroutineScope, SharingStarted.WhileSubscribed(5000), PendingData(emptySet(), true, null))
 	private var availableTagsDeferred = loadTagsAsync()
 	private var availableLocalesDeferred = loadLocalesAsync()
 	private var allTagsLoadJob: Job? = null
@@ -96,6 +114,22 @@ class FilterCoordinator @Inject constructor(
 		)
 	}.stateIn(coroutineScope + Dispatchers.Default, SharingStarted.Lazily, loadingProperty())
 
+	override val filterTagsExcluded: StateFlow<FilterProperty<MangaTag>> = if (repository.isTagsExclusionSupported) {
+		combine(
+			currentState.distinctUntilChangedBy { it.tagsExclude },
+			getBottomTagsAsFlow(4),
+		) { state, tags ->
+			FilterProperty(
+				availableItems = tags.items.asArrayList(),
+				selectedItems = state.tagsExclude,
+				isLoading = tags.isLoading,
+				error = tags.error,
+			)
+		}.stateIn(coroutineScope + Dispatchers.Default, SharingStarted.Lazily, loadingProperty())
+	} else {
+		MutableStateFlow(emptyProperty())
+	}
+
 	override val filterSortOrder: StateFlow<FilterProperty<SortOrder>> = combine(
 		currentState.distinctUntilChangedBy { it.sortOrder },
 		flowOf(repository.sortOrders),
@@ -120,6 +154,18 @@ class FilterCoordinator @Inject constructor(
 		)
 	}.stateIn(coroutineScope + Dispatchers.Default, SharingStarted.Lazily, loadingProperty())
 
+	override val filterContentRating: StateFlow<FilterProperty<ContentRating>> = combine(
+		currentState.distinctUntilChangedBy { it.contentRating },
+		flowOf(repository.contentRatings),
+	) { rating, ratings ->
+		FilterProperty(
+			availableItems = ratings.sortedBy { it.ordinal },
+			selectedItems = rating.contentRating,
+			isLoading = false,
+			error = null,
+		)
+	}.stateIn(coroutineScope + Dispatchers.Default, SharingStarted.Lazily, loadingProperty())
+
 	override val filterLocale: StateFlow<FilterProperty<Locale?>> = combine(
 		currentState.distinctUntilChangedBy { it.locale },
 		getLocalesAsFlow(),
@@ -187,7 +233,32 @@ class FilterCoordinator @Inject constructor(
 					emptySet()
 				}
 			}
-			oldValue.copy(tags = newTags)
+			oldValue.copy(
+				tags = newTags,
+				tagsExclude = oldValue.tagsExclude - newTags,
+			)
+		}
+	}
+
+	override fun setTagExcluded(value: MangaTag, addOrRemove: Boolean) {
+		currentState.update { oldValue ->
+			val newTags = if (repository.isMultipleTagsSupported) {
+				if (addOrRemove) {
+					oldValue.tagsExclude + value
+				} else {
+					oldValue.tagsExclude - value
+				}
+			} else {
+				if (addOrRemove) {
+					setOf(value)
+				} else {
+					emptySet()
+				}
+			}
+			oldValue.copy(
+				tagsExclude = newTags,
+				tags = oldValue.tags - newTags
+			)
 		}
 	}
 
@@ -202,6 +273,17 @@ class FilterCoordinator @Inject constructor(
 		}
 	}
 
+	override fun setContentRating(value: ContentRating, addOrRemove: Boolean) {
+		currentState.update { oldValue ->
+			val newRating = if (addOrRemove) {
+				oldValue.contentRating + value
+			} else {
+				oldValue.contentRating - value
+			}
+			oldValue.copy(contentRating = newRating)
+		}
+	}
+
 	override fun onListHeaderClick(item: ListHeader, view: View) {
 		currentState.update { oldValue ->
 			oldValue.copy(
@@ -224,13 +306,16 @@ class FilterCoordinator @Inject constructor(
 
 	fun setTags(tags: Set<MangaTag>) {
 		currentState.update { oldValue ->
-			oldValue.copy(tags = tags)
+			oldValue.copy(
+				tags = tags,
+				tagsExclude = oldValue.tagsExclude - tags
+			)
 		}
 	}
 
 	fun reset() {
 		currentState.update { oldValue ->
-			oldValue.copy(oldValue.sortOrder, emptySet(), null, emptySet())
+			MangaListFilter.Advanced.Builder(oldValue.sortOrder).build()
 		}
 	}
 
@@ -248,17 +333,6 @@ class FilterCoordinator @Inject constructor(
 		)
 	}
 
-	private fun getTagsAsFlow() = flow {
-		val localTags = localTags.get()
-		emit(PendingData(localTags, isLoading = true, error = null))
-		tryLoadTags()
-			.onSuccess { remoteTags ->
-				emit(PendingData(mergeTags(remoteTags, localTags), isLoading = false, error = null))
-			}.onFailure {
-				emit(PendingData(localTags, isLoading = false, error = it))
-			}
-	}
-
 	private fun getLocalesAsFlow(): Flow<PendingData<Locale>> = flow {
 		emit(PendingData(emptySet(), isLoading = true, error = null))
 		tryLoadLocales()
@@ -277,7 +351,18 @@ class FilterCoordinator @Inject constructor(
 				searchRepository.getTagsSuggestion(it).take(limit)
 			}
 		},
-		getTagsAsFlow(),
+		tagsFlow,
+	) { suggested, all ->
+		val res = suggested.toMutableList()
+		if (res.size < limit) {
+			res.addAll(all.items.shuffled().take(limit - res.size))
+		}
+		PendingData(res, all.isLoading, all.error.takeIf { res.size < limit })
+	}
+
+	private fun getBottomTagsAsFlow(limit: Int): Flow<PendingData<MangaTag>> = combine(
+		flow { emit(searchRepository.getRareTags(repository.source, limit)) },
+		tagsFlow,
 	) { suggested, all ->
 		val res = suggested.toMutableList()
 		if (res.size < limit) {
@@ -411,6 +496,8 @@ class FilterCoordinator @Inject constructor(
 
 	private fun <T> loadingProperty() = FilterProperty<T>(emptyList(), emptySet(), true, null)
 
+	private fun <T> emptyProperty() = FilterProperty<T>(emptyList(), emptySet(), false, null)
+
 	private class TagTitleComparator(lc: String?) : Comparator<MangaTag> {
 
 		private val collator = lc?.let { Collator.getInstance(Locale(it)) }

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

@@ -37,7 +37,7 @@ class FilterHeaderFragment : BaseFragment<FragmentFilterHeaderBinding>(), ChipsV
 	override fun onChipClick(chip: Chip, data: Any?) {
 		val tag = data as? MangaTag
 		if (tag == null) {
-			TagsCatalogSheet.show(parentFragmentManager)
+			TagsCatalogSheet.show(parentFragmentManager, isExcludeTag = false)
 		} else {
 			filter.setTag(tag, chip.isChecked)
 		}

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

@@ -4,6 +4,7 @@ import kotlinx.coroutines.flow.StateFlow
 import org.koitharu.kotatsu.filter.ui.model.FilterHeaderModel
 import org.koitharu.kotatsu.filter.ui.model.FilterProperty
 import org.koitharu.kotatsu.list.ui.model.ListModel
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
@@ -15,10 +16,14 @@ interface MangaFilter : OnFilterChangedListener {
 
 	val filterTags: StateFlow<FilterProperty<MangaTag>>
 
+	val filterTagsExcluded: StateFlow<FilterProperty<MangaTag>>
+
 	val filterSortOrder: StateFlow<FilterProperty<SortOrder>>
 
 	val filterState: StateFlow<FilterProperty<MangaState>>
 
+	val filterContentRating: StateFlow<FilterProperty<ContentRating>>
+
 	val filterLocale: StateFlow<FilterProperty<Locale?>>
 
 	val header: StateFlow<FilterHeaderModel>

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

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.filter.ui
 
 import org.koitharu.kotatsu.list.ui.adapter.ListHeaderClickListener
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
@@ -14,5 +15,9 @@ interface OnFilterChangedListener : ListHeaderClickListener {
 
 	fun setTag(value: MangaTag, addOrRemove: Boolean)
 
+	fun setTagExcluded(value: MangaTag, addOrRemove: Boolean)
+
 	fun setState(value: MangaState, addOrRemove: Boolean)
+
+	fun setContentRating(value: ContentRating, addOrRemove: Boolean)
 }

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

@@ -18,12 +18,14 @@ import org.koitharu.kotatsu.core.ui.sheet.BaseAdaptiveSheet
 import org.koitharu.kotatsu.core.ui.widgets.ChipsView
 import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
 import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.parentView
 import org.koitharu.kotatsu.core.util.ext.showDistinct
 import org.koitharu.kotatsu.core.util.ext.textAndVisible
 import org.koitharu.kotatsu.databinding.SheetFilterBinding
 import org.koitharu.kotatsu.filter.ui.FilterOwner
 import org.koitharu.kotatsu.filter.ui.model.FilterProperty
 import org.koitharu.kotatsu.filter.ui.tags.TagsCatalogSheet
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.MangaState
 import org.koitharu.kotatsu.parsers.model.MangaTag
 import org.koitharu.kotatsu.parsers.model.SortOrder
@@ -31,8 +33,9 @@ import org.koitharu.kotatsu.parsers.util.toTitleCase
 import java.util.Locale
 import com.google.android.material.R as materialR
 
-class FilterSheetFragment :
-	BaseAdaptiveSheet<SheetFilterBinding>(), AdapterView.OnItemSelectedListener, ChipsView.OnChipClickListener {
+class FilterSheetFragment : BaseAdaptiveSheet<SheetFilterBinding>(),
+	AdapterView.OnItemSelectedListener,
+	ChipsView.OnChipClickListener {
 
 	override fun onCreateViewBinding(inflater: LayoutInflater, container: ViewGroup?): SheetFilterBinding {
 		return SheetFilterBinding.inflate(inflater, container, false)
@@ -50,12 +53,16 @@ class FilterSheetFragment :
 		filter.filterSortOrder.observe(viewLifecycleOwner, this::onSortOrderChanged)
 		filter.filterLocale.observe(viewLifecycleOwner, this::onLocaleChanged)
 		filter.filterTags.observe(viewLifecycleOwner, this::onTagsChanged)
+		filter.filterTagsExcluded.observe(viewLifecycleOwner, this::onTagsExcludedChanged)
 		filter.filterState.observe(viewLifecycleOwner, this::onStateChanged)
+		filter.filterContentRating.observe(viewLifecycleOwner, this::onContentRatingChanged)
 
 		binding.spinnerLocale.onItemSelectedListener = this
 		binding.spinnerOrder.onItemSelectedListener = this
 		binding.chipsState.onChipClickListener = this
+		binding.chipsContentRating.onChipClickListener = this
 		binding.chipsGenres.onChipClickListener = this
+		binding.chipsGenresExclude.onChipClickListener = this
 	}
 
 	override fun onItemSelected(parent: AdapterView<*>, view: View?, position: Int, id: Long) {
@@ -72,8 +79,14 @@ class FilterSheetFragment :
 		val filter = requireFilter()
 		when (data) {
 			is MangaState -> filter.setState(data, chip.isChecked)
-			is MangaTag -> filter.setTag(data, chip.isChecked)
-			null -> TagsCatalogSheet.show(childFragmentManager)
+			is MangaTag -> if (chip.parentView?.id == R.id.chips_genresExclude) {
+				filter.setTagExcluded(data, chip.isChecked)
+			} else {
+				filter.setTag(data, chip.isChecked)
+			}
+
+			is ContentRating -> filter.setContentRating(data, chip.isChecked)
+			null -> TagsCatalogSheet.show(childFragmentManager, chip.parentView?.id == R.id.chips_genresExclude)
 		}
 	}
 
@@ -166,6 +179,51 @@ class FilterSheetFragment :
 		b.chipsGenres.setChips(chips)
 	}
 
+	private fun onTagsExcludedChanged(value: FilterProperty<MangaTag>) {
+		val b = viewBinding ?: return
+		b.textViewGenresExcludeTitle.isGone = value.isEmpty()
+		b.chipsGenresExclude.isGone = value.isEmpty()
+		if (value.isEmpty()) {
+			return
+		}
+		val chips = ArrayList<ChipsView.ChipModel>(value.selectedItems.size + value.availableItems.size + 1)
+		value.selectedItems.mapTo(chips) { tag ->
+			ChipsView.ChipModel(
+				tint = 0,
+				title = tag.title,
+				icon = 0,
+				isCheckable = true,
+				isChecked = true,
+				data = tag,
+			)
+		}
+		value.availableItems.mapNotNullTo(chips) { tag ->
+			if (tag !in value.selectedItems) {
+				ChipsView.ChipModel(
+					tint = 0,
+					title = tag.title,
+					icon = 0,
+					isCheckable = true,
+					isChecked = false,
+					data = tag,
+				)
+			} else {
+				null
+			}
+		}
+		chips.add(
+			ChipsView.ChipModel(
+				tint = 0,
+				title = getString(R.string.more),
+				icon = materialR.drawable.abc_ic_menu_overflow_material,
+				isCheckable = false,
+				isChecked = false,
+				data = null,
+			),
+		)
+		b.chipsGenresExclude.setChips(chips)
+	}
+
 	private fun onStateChanged(value: FilterProperty<MangaState>) {
 		val b = viewBinding ?: return
 		b.textViewStateTitle.isGone = value.isEmpty()
@@ -186,6 +244,26 @@ class FilterSheetFragment :
 		b.chipsState.setChips(chips)
 	}
 
+	private fun onContentRatingChanged(value: FilterProperty<ContentRating>) {
+		val b = viewBinding ?: return
+		b.textViewContentRatingTitle.isGone = value.isEmpty()
+		b.chipsContentRating.isGone = value.isEmpty()
+		if (value.isEmpty()) {
+			return
+		}
+		val chips = value.availableItems.map { contentRating ->
+			ChipsView.ChipModel(
+				tint = 0,
+				title = getString(contentRating.titleResId),
+				icon = 0,
+				isCheckable = true,
+				isChecked = contentRating in value.selectedItems,
+				data = contentRating,
+			)
+		}
+		b.chipsContentRating.setChips(chips)
+	}
+
 	private fun requireFilter() = (requireActivity() as FilterOwner).filter
 
 	companion object {

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

@@ -19,6 +19,7 @@ import org.koitharu.kotatsu.core.ui.sheet.AdaptiveSheetCallback
 import org.koitharu.kotatsu.core.ui.sheet.BaseAdaptiveSheet
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.showDistinct
+import org.koitharu.kotatsu.core.util.ext.withArgs
 import org.koitharu.kotatsu.databinding.SheetTagsBinding
 import org.koitharu.kotatsu.filter.ui.FilterOwner
 import org.koitharu.kotatsu.filter.ui.model.TagCatalogItem
@@ -30,7 +31,10 @@ class TagsCatalogSheet : BaseAdaptiveSheet<SheetTagsBinding>(), OnListItemClickL
 	private val viewModel by viewModels<TagsCatalogViewModel>(
 		extrasProducer = {
 			defaultViewModelCreationExtras.withCreationCallback<TagsCatalogViewModel.Factory> { factory ->
-				factory.create((requireActivity() as FilterOwner).filter)
+				factory.create(
+					filter = (requireActivity() as FilterOwner).filter,
+					isExcludeTag = requireArguments().getBoolean(ARG_EXCLUDE),
+				)
 			}
 		},
 	)
@@ -54,8 +58,7 @@ class TagsCatalogSheet : BaseAdaptiveSheet<SheetTagsBinding>(), OnListItemClickL
 	}
 
 	override fun onItemClick(item: TagCatalogItem, view: View) {
-		val filter = (requireActivity() as FilterOwner).filter
-		filter.setTag(item.tag, !item.isChecked)
+		viewModel.handleTagClick(item.tag, item.isChecked)
 	}
 
 	override fun onFocusChange(v: View?, hasFocus: Boolean) {
@@ -90,7 +93,10 @@ class TagsCatalogSheet : BaseAdaptiveSheet<SheetTagsBinding>(), OnListItemClickL
 	companion object {
 
 		private const val TAG = "TagsCatalogSheet"
+		private const val ARG_EXCLUDE = "exclude"
 
-		fun show(fm: FragmentManager) = TagsCatalogSheet().showDistinct(fm, TAG)
+		fun show(fm: FragmentManager, isExcludeTag: Boolean) = TagsCatalogSheet().withArgs(1) {
+			putBoolean(ARG_EXCLUDE, isExcludeTag)
+		}.showDistinct(fm, TAG)
 	}
 }

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

@@ -8,29 +8,32 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
-import org.koitharu.kotatsu.core.parser.MangaDataRepository
-import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.filter.ui.MangaFilter
+import org.koitharu.kotatsu.filter.ui.model.FilterProperty
 import org.koitharu.kotatsu.filter.ui.model.TagCatalogItem
 import org.koitharu.kotatsu.list.ui.model.LoadingState
+import org.koitharu.kotatsu.parsers.model.MangaTag
 
 @HiltViewModel(assistedFactory = TagsCatalogViewModel.Factory::class)
 class TagsCatalogViewModel @AssistedInject constructor(
-	@Assisted filter: MangaFilter,
-	mangaRepositoryFactory: MangaRepository.Factory,
-	dataRepository: MangaDataRepository,
+	@Assisted private val filter: MangaFilter,
+	@Assisted private val isExcluded: Boolean,
 ) : BaseViewModel() {
 
 	val searchQuery = MutableStateFlow("")
 
+	private val filterProperty: StateFlow<FilterProperty<MangaTag>>
+		get() = if (isExcluded) filter.filterTagsExcluded else filter.filterTags
+
 	private val tags = combine(
 		filter.allTags,
-		filter.filterTags.map { it.selectedItems },
+		filterProperty.map { it.selectedItems },
 	) { all, selected ->
 		all.map { x ->
 			if (x is TagCatalogItem) {
@@ -52,9 +55,17 @@ class TagsCatalogViewModel @AssistedInject constructor(
 		}
 	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Lazily, listOf(LoadingState))
 
+	fun handleTagClick(tag: MangaTag, isChecked: Boolean) {
+		if (isExcluded) {
+			filter.setTagExcluded(tag, !isChecked)
+		} else {
+			filter.setTag(tag, !isChecked)
+		}
+	}
+
 	@AssistedFactory
 	interface Factory {
-		fun create(filter: MangaFilter): TagsCatalogViewModel
+		fun create(filter: MangaFilter, isExcludeTag: Boolean): TagsCatalogViewModel
 	}
 
 }

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

@@ -24,6 +24,7 @@ import org.koitharu.kotatsu.local.data.input.LocalMangaInput
 import org.koitharu.kotatsu.local.data.output.LocalMangaOutput
 import org.koitharu.kotatsu.local.data.output.LocalMangaUtil
 import org.koitharu.kotatsu.local.domain.model.LocalManga
+import org.koitharu.kotatsu.parsers.model.ContentRating
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaListFilter
@@ -52,8 +53,11 @@ class LocalMangaRepository @Inject constructor(
 	private val locks = CompositeMutex2<Long>()
 
 	override val isMultipleTagsSupported: Boolean = true
+	override val isTagsExclusionSupported: Boolean = true
+	override val isSearchSupported: Boolean = true
 	override val sortOrders: Set<SortOrder> = EnumSet.of(SortOrder.ALPHABETICAL, SortOrder.RATING, SortOrder.NEWEST)
 	override val states = emptySet<MangaState>()
+	override val contentRatings = emptySet<ContentRating>()
 
 	override var defaultSortOrder: SortOrder
 		get() = settings.localListOrder
@@ -75,6 +79,9 @@ class LocalMangaRepository @Inject constructor(
 				if (filter.tags.isNotEmpty()) {
 					list.retainAll { x -> x.containsTags(filter.tags) }
 				}
+				if (filter.tagsExclude.isNotEmpty()) {
+					list.removeAll { x -> x.containsAnyTag(filter.tags) }
+				}
 				when (filter.sortOrder) {
 					SortOrder.ALPHABETICAL -> list.sortWith(compareBy(AlphanumComparator()) { x -> x.manga.title })
 					SortOrder.RATING -> list.sortByDescending { it.manga.rating }

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

@@ -30,6 +30,12 @@ data class LocalManga(
 		return manga.tags.containsAll(tags)
 	}
 
+	fun containsAnyTag(tags: Set<MangaTag>): Boolean {
+		return tags.any { tag ->
+			manga.tags.contains(tag)
+		}
+	}
+
 	override fun toString(): String {
 		return "LocalManga(${file.path}: ${manga.title})"
 	}

app/src/main/kotlin/org/koitharu/kotatsu/search/domain/MangaSearchRepository.kt

@@ -111,6 +111,10 @@ class MangaSearchRepository @Inject constructor(
 		}
 	}
 
+	suspend fun getRareTags(source: MangaSource, limit: Int): List<MangaTag> {
+		return db.getTagsDao().findRareTags(source.name, limit).toMangaTagsList()
+	}
+
 	fun getSourcesSuggestion(query: String, limit: Int): List<MangaSource> {
 		if (query.length < 3) {
 			return emptyList()

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

@@ -211,12 +211,9 @@ class SuggestionsWorker @AssistedInject constructor(
 		}
 		val list = repository.getList(
 			offset = 0,
-			filter = MangaListFilter.Advanced(
-				sortOrder = order,
-				tags = setOfNotNull(tag),
-				locale = null,
-				states = setOf(),
-			),
+			filter = MangaListFilter.Advanced.Builder(order)
+				.tags(setOfNotNull(tag))
+				.build(),
 		).asArrayList()
 		if (appSettings.isSuggestionsExcludeNsfw) {
 			list.removeAll { it.isNsfw }

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

@@ -126,6 +126,28 @@
 				tools:text="@string/error_multiple_genres_not_supported"
 				tools:visibility="visible" />
 
+			<TextView
+				android:id="@+id/textView_genresExclude_title"
+				android:layout_width="match_parent"
+				android:layout_height="wrap_content"
+				android:layout_marginHorizontal="@dimen/margin_normal"
+				android:layout_marginTop="@dimen/margin_normal"
+				android:singleLine="true"
+				android:text="@string/genres_exclude"
+				android:textAppearance="?textAppearanceTitleSmall"
+				android:visibility="gone"
+				tools:visibility="visible" />
+
+			<org.koitharu.kotatsu.core.ui.widgets.ChipsView
+				android:id="@+id/chips_genresExclude"
+				android:layout_width="match_parent"
+				android:layout_height="wrap_content"
+				android:layout_marginTop="@dimen/margin_normal"
+				android:paddingHorizontal="@dimen/margin_normal"
+				android:visibility="gone"
+				app:chipStyle="@style/Widget.Kotatsu.Chip.Filter"
+				tools:visibility="visible" />
+
 			<TextView
 				android:id="@+id/textView_state_title"
 				android:layout_width="match_parent"
@@ -148,6 +170,28 @@
 				app:chipStyle="@style/Widget.Kotatsu.Chip.Filter"
 				tools:visibility="visible" />
 
+			<TextView
+				android:id="@+id/textView_contentRating_title"
+				android:layout_width="match_parent"
+				android:layout_height="wrap_content"
+				android:layout_marginHorizontal="@dimen/margin_normal"
+				android:layout_marginTop="@dimen/margin_normal"
+				android:singleLine="true"
+				android:text="@string/content_rating"
+				android:textAppearance="?textAppearanceTitleSmall"
+				android:visibility="gone"
+				tools:visibility="visible" />
+
+			<org.koitharu.kotatsu.core.ui.widgets.ChipsView
+				android:id="@+id/chips_contentRating"
+				android:layout_width="match_parent"
+				android:layout_height="wrap_content"
+				android:layout_marginTop="@dimen/margin_normal"
+				android:paddingHorizontal="@dimen/margin_normal"
+				android:visibility="gone"
+				app:chipStyle="@style/Widget.Kotatsu.Chip.Filter"
+				tools:visibility="visible" />
+
 		</LinearLayout>
 	</androidx.core.widget.NestedScrollView>
 </LinearLayout>

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

@@ -550,4 +550,9 @@
 	<string name="backup_date_">Backup date: %s</string>
 	<string name="state_upcoming">Upcoming</string>
 	<string name="by_name_reverse">Name reversed</string>
+	<string name="content_rating">Content rating</string>
+	<string name="genres_exclude">Exclude genres</string>
+	<string name="rating_safe">Safe</string>
+	<string name="rating_suggestive">Suggestive</string>
+	<string name="rating_adult">Adult</string>
 </resources>