Refactor filters

app/src/main/java/org/koitharu/kotatsu/list/domain/AvailableFilters.kt

@@ -0,0 +1,30 @@
+package org.koitharu.kotatsu.list.domain
+
+import org.koitharu.kotatsu.core.model.MangaTag
+import org.koitharu.kotatsu.core.model.SortOrder
+
+class AvailableFilters(
+	val sortOrders: Set<SortOrder>,
+	val tags: Set<MangaTag>,
+) {
+
+	val size: Int
+		get() = sortOrders.size + tags.size
+
+	override fun equals(other: Any?): Boolean {
+		if (this === other) return true
+		if (javaClass != other?.javaClass) return false
+		other as AvailableFilters
+		if (sortOrders != other.sortOrders) return false
+		if (tags != other.tags) return false
+		return true
+	}
+
+	override fun hashCode(): Int {
+		var result = sortOrders.hashCode()
+		result = 31 * result + tags.hashCode()
+		return result
+	}
+
+	fun isEmpty(): Boolean = sortOrders.isEmpty() && tags.isEmpty()
+}

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

@@ -1,11 +0,0 @@
-package org.koitharu.kotatsu.list.ui
-
-import org.koitharu.kotatsu.core.model.MangaFilter
-import org.koitharu.kotatsu.core.model.MangaTag
-import org.koitharu.kotatsu.core.model.SortOrder
-
-data class MangaFilterConfig(
-	val sortOrders: List<SortOrder>,
-	val tags: List<MangaTag>,
-	val currentFilter: MangaFilter?
-)

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

@@ -22,19 +22,17 @@ import org.koitharu.kotatsu.base.ui.BaseFragment
 import org.koitharu.kotatsu.base.ui.list.OnListItemClickListener
 import org.koitharu.kotatsu.base.ui.list.PaginationScrollListener
 import org.koitharu.kotatsu.base.ui.list.decor.ItemTypeDividerDecoration
-import org.koitharu.kotatsu.base.ui.list.decor.SectionItemDecoration
 import org.koitharu.kotatsu.base.ui.list.decor.SpacingItemDecoration
 import org.koitharu.kotatsu.browser.cloudflare.CloudFlareDialog
 import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
 import org.koitharu.kotatsu.core.exceptions.resolve.ResolvableException
 import org.koitharu.kotatsu.core.model.Manga
-import org.koitharu.kotatsu.core.model.MangaFilter
 import org.koitharu.kotatsu.core.prefs.ListMode
 import org.koitharu.kotatsu.databinding.FragmentListBinding
 import org.koitharu.kotatsu.details.ui.DetailsActivity
 import org.koitharu.kotatsu.list.ui.adapter.MangaListAdapter
-import org.koitharu.kotatsu.list.ui.filter.FilterAdapter
-import org.koitharu.kotatsu.list.ui.filter.OnFilterChangedListener
+import org.koitharu.kotatsu.list.ui.filter.FilterAdapter2
+import org.koitharu.kotatsu.list.ui.filter.FilterItem
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.main.ui.AppBarOwner
 import org.koitharu.kotatsu.main.ui.MainActivity
@@ -42,10 +40,11 @@ import org.koitharu.kotatsu.utils.RecycledViewPoolHolder
 import org.koitharu.kotatsu.utils.ext.*
 
 abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
-	PaginationScrollListener.Callback, OnListItemClickListener<Manga>, OnFilterChangedListener,
-	SectionItemDecoration.Callback, SwipeRefreshLayout.OnRefreshListener {
+	PaginationScrollListener.Callback, OnListItemClickListener<Manga>,
+	SwipeRefreshLayout.OnRefreshListener {
 
 	private var listAdapter: MangaListAdapter? = null
+	private var filterAdapter: FilterAdapter2? = null
 	private var paginationListener: PaginationScrollListener? = null
 	private val spanResolver = MangaListSpanResolver()
 	private val spanSizeLookup = SpanSizeLookup()
@@ -78,6 +77,7 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 			onRetryClick = ::resolveException,
 			onTagRemoveClick = viewModel::onRemoveFilterTag
 		)
+		filterAdapter = FilterAdapter2(viewModel)
 		paginationListener = PaginationScrollListener(4, this)
 		with(binding.recyclerView) {
 			setHasFixedSize(true)
@@ -94,8 +94,7 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 		}
 		with(binding.recyclerViewFilter) {
 			setHasFixedSize(true)
-			addItemDecoration(ItemTypeDividerDecoration(view.context))
-			addItemDecoration(SectionItemDecoration(false, this@MangaListFragment))
+			adapter = filterAdapter
 		}
 
 		(parentFragment as? RecycledViewPoolHolder)?.let {
@@ -113,6 +112,7 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 	override fun onDestroyView() {
 		drawer = null
 		listAdapter = null
+		filterAdapter = null
 		paginationListener = null
 		spanSizeLookup.invalidateCache()
 		super.onDestroyView()
@@ -203,28 +203,21 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 		}
 	}
 
-	protected fun onInitFilter(config: MangaFilterConfig) {
-		binding.recyclerViewFilter.adapter = FilterAdapter(
-			sortOrders = config.sortOrders,
-			tags = config.tags,
-			state = config.currentFilter,
-			listener = this
-		)
+	protected fun onInitFilter(filter: List<FilterItem>) {
+		filterAdapter?.items = filter
 		drawer?.setDrawerLockMode(
-			if (config.sortOrders.isEmpty() && config.tags.isEmpty()) {
+			if (filter.isEmpty()) {
 				DrawerLayout.LOCK_MODE_LOCKED_CLOSED
 			} else {
 				DrawerLayout.LOCK_MODE_UNLOCKED
 			}
 		) ?: binding.dividerFilter?.let {
-			it.isGone = config.sortOrders.isEmpty() && config.tags.isEmpty()
+			it.isGone = filter.isEmpty()
 			binding.recyclerViewFilter.isVisible = it.isVisible
 		}
 		activity?.invalidateOptionsMenu()
 	}
 
-	override fun onFilterChanged(filter: MangaFilter) = Unit
-
 	override fun onWindowInsetsChanged(insets: Insets) {
 		val headerHeight = (activity as? AppBarOwner)?.appBar?.measureHeight() ?: insets.top
 		binding.recyclerViewFilter.updatePadding(
@@ -284,20 +277,6 @@ abstract class MangaListFragment : BaseFragment<FragmentListBinding>(),
 		}
 	}
 
-	final override fun isSection(position: Int): Boolean {
-		return position == 0 || binding.recyclerViewFilter.adapter?.run {
-			getItemViewType(position) != getItemViewType(position - 1)
-		} ?: false
-	}
-
-	final override fun getSectionTitle(position: Int): CharSequence? {
-		return when (binding.recyclerViewFilter.adapter?.getItemViewType(position)) {
-			FilterAdapter.VIEW_TYPE_SORT -> getString(R.string.sort_order)
-			FilterAdapter.VIEW_TYPE_TAG -> getString(R.string.genres)
-			else -> null
-		}
-	}
-
 	protected open fun onCreatePopupMenu(inflater: MenuInflater, menu: Menu, data: Manga) = Unit
 
 	protected open fun onPopupMenuItemSelected(item: MenuItem, data: Manga) = false

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

@@ -1,23 +1,32 @@
 package org.koitharu.kotatsu.list.ui
 
+import androidx.annotation.CallSuper
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.cancelAndJoin
+import kotlinx.coroutines.ensureActive
 import kotlinx.coroutines.flow.*
+import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseViewModel
+import org.koitharu.kotatsu.core.model.MangaFilter
 import org.koitharu.kotatsu.core.model.MangaTag
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.prefs.ListMode
+import org.koitharu.kotatsu.list.domain.AvailableFilters
+import org.koitharu.kotatsu.list.ui.filter.FilterItem
+import org.koitharu.kotatsu.list.ui.filter.OnFilterChangedListener
 import org.koitharu.kotatsu.list.ui.model.ListModel
 import org.koitharu.kotatsu.utils.ext.asLiveDataDistinct
 
 abstract class MangaListViewModel(
-	private val settings: AppSettings
-) : BaseViewModel() {
+	private val settings: AppSettings,
+) : BaseViewModel(), OnFilterChangedListener {
 
 	abstract val content: LiveData<List<ListModel>>
-	val filter = MutableLiveData<MangaFilterConfig>()
+	val filter = MutableLiveData<List<FilterItem>>()
 	val listMode = MutableLiveData<ListMode>()
 	val gridScale = settings.observe()
 		.filter { it == AppSettings.KEY_GRID_SIZE }
@@ -37,7 +46,62 @@ abstract class MangaListViewModel(
 			}
 		}
 
-	open fun onRemoveFilterTag(tag: MangaTag) = Unit
+	protected var currentFilter: MangaFilter = MangaFilter(null, emptySet())
+		private set(value) {
+			field = value
+			onFilterChanged()
+		}
+	protected var availableFilters: AvailableFilters? = null
+	private var filterJob: Job? = null
+
+	final override fun onSortItemClick(item: FilterItem.Sort) {
+		currentFilter = currentFilter.copy(sortOrder = item.order)
+	}
+
+	final override fun onTagItemClick(item: FilterItem.Tag) {
+		val tags = if (item.isChecked) {
+			currentFilter.tags - item.tag
+		} else {
+			currentFilter.tags + item.tag
+		}
+		currentFilter = currentFilter.copy(tags = tags)
+	}
+
+	fun onRemoveFilterTag(tag: MangaTag) {
+		val tags = currentFilter.tags
+		if (tag !in tags) {
+			return
+		}
+		currentFilter = currentFilter.copy(tags = tags - tag)
+	}
+
+	@CallSuper
+	open fun onFilterChanged() {
+		val previousJob = filterJob
+		filterJob = launchJob(Dispatchers.Default) {
+			previousJob?.cancelAndJoin()
+			filter.postValue(
+				availableFilters?.run {
+					val list = ArrayList<FilterItem>(size + 2)
+					if (sortOrders.isNotEmpty()) {
+						val selectedSort = currentFilter.sortOrder ?: sortOrders.first()
+						list += FilterItem.Header(R.string.sort_order)
+						sortOrders.sortedBy { it.ordinal }.mapTo(list) {
+							FilterItem.Sort(it, isSelected = it == selectedSort)
+						}
+					}
+					if (tags.isNotEmpty()) {
+						list += FilterItem.Header(R.string.genres)
+						tags.sortedBy { it.title }.mapTo(list) {
+							FilterItem.Tag(it, isChecked = it in currentFilter.tags)
+						}
+					}
+					ensureActive()
+					list
+				}.orEmpty()
+			)
+		}
+	}
 
 	abstract fun onRefresh()
 

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

@@ -1,94 +0,0 @@
-package org.koitharu.kotatsu.list.ui.filter
-
-import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
-import org.koitharu.kotatsu.base.ui.list.BaseViewHolder
-import org.koitharu.kotatsu.core.model.MangaFilter
-import org.koitharu.kotatsu.core.model.MangaTag
-import org.koitharu.kotatsu.core.model.SortOrder
-
-class FilterAdapter(
-	private val sortOrders: List<SortOrder> = emptyList(),
-	private val tags: List<MangaTag> = emptyList(),
-	state: MangaFilter?,
-	private val listener: OnFilterChangedListener
-) : RecyclerView.Adapter<BaseViewHolder<*, Boolean, *>>() {
-
-	private var currentState = state ?: MangaFilter(sortOrders.firstOrNull(), emptySet())
-
-	override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = when (viewType) {
-		VIEW_TYPE_SORT -> FilterSortHolder(parent).apply {
-			itemView.setOnClickListener {
-				setCheckedSort(requireData())
-			}
-		}
-		VIEW_TYPE_TAG -> FilterTagHolder(parent).apply {
-			itemView.setOnClickListener {
-				setCheckedTag(boundData ?: return@setOnClickListener, !isChecked)
-			}
-		}
-		else -> throw IllegalArgumentException("Unknown viewType $viewType")
-	}
-
-	override fun getItemCount() = sortOrders.size + tags.size
-
-	override fun onBindViewHolder(holder: BaseViewHolder<*, Boolean, *>, position: Int) {
-		when (holder) {
-			is FilterSortHolder -> {
-				val item = sortOrders[position]
-				holder.bind(item, item == currentState.sortOrder)
-			}
-			is FilterTagHolder -> {
-				val item = tags[position - sortOrders.size]
-				holder.bind(item, item in currentState.tags)
-			}
-		}
-	}
-
-	override fun getItemViewType(position: Int) = when (position) {
-		in sortOrders.indices -> VIEW_TYPE_SORT
-		else -> VIEW_TYPE_TAG
-	}
-
-	fun setCheckedTag(tag: MangaTag, isChecked: Boolean) {
-		currentState = if (tag in currentState.tags) {
-			if (!isChecked) {
-				currentState.copy(tags = currentState.tags - tag)
-			} else {
-				return
-			}
-		} else {
-			if (isChecked) {
-				currentState.copy(tags = currentState.tags + tag)
-			} else {
-				return
-			}
-		}
-		val index = tags.indexOf(tag)
-		if (index in tags.indices) {
-			notifyItemChanged(sortOrders.size + index)
-		}
-		listener.onFilterChanged(currentState)
-	}
-
-	fun setCheckedSort(sort: SortOrder) {
-		if (sort != currentState.sortOrder) {
-			val oldItemPos = sortOrders.indexOf(currentState.sortOrder)
-			val newItemPos = sortOrders.indexOf(sort)
-			currentState = currentState.copy(sortOrder = sort)
-			if (oldItemPos in sortOrders.indices) {
-				notifyItemChanged(oldItemPos)
-			}
-			if (newItemPos in sortOrders.indices) {
-				notifyItemChanged(newItemPos)
-			}
-			listener.onFilterChanged(currentState)
-		}
-	}
-
-	companion object {
-
-		const val VIEW_TYPE_SORT = 0
-		const val VIEW_TYPE_TAG = 1
-	}
-}

app/src/main/java/org/koitharu/kotatsu/list/ui/filter/FilterAdapter2.kt

@@ -0,0 +1,12 @@
+package org.koitharu.kotatsu.list.ui.filter
+
+import com.hannesdorfmann.adapterdelegates4.AsyncListDifferDelegationAdapter
+
+class FilterAdapter2(
+	listener: OnFilterChangedListener,
+) : AsyncListDifferDelegationAdapter<FilterItem>(
+	FilterDiffCallback(),
+	filterSortDelegate(listener),
+	filterTagDelegate(listener),
+	filterHeaderDelegate(),
+)

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

@@ -0,0 +1,47 @@
+package org.koitharu.kotatsu.list.ui.filter
+
+import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
+import org.koitharu.kotatsu.databinding.ItemCheckableMultipleBinding
+import org.koitharu.kotatsu.databinding.ItemCheckableSingleBinding
+import org.koitharu.kotatsu.databinding.ItemFilterHeaderBinding
+
+fun filterSortDelegate(
+	listener: OnFilterChangedListener,
+) = adapterDelegateViewBinding<FilterItem.Sort, FilterItem, ItemCheckableSingleBinding>(
+	{ layoutInflater, parent -> ItemCheckableSingleBinding.inflate(layoutInflater, parent, false) }
+) {
+
+	itemView.setOnClickListener {
+		listener.onSortItemClick(item)
+	}
+
+	bind {
+		binding.root.setText(item.order.titleRes)
+		binding.root.isChecked = item.isSelected
+	}
+}
+
+fun filterTagDelegate(
+	listener: OnFilterChangedListener,
+) = adapterDelegateViewBinding<FilterItem.Tag, FilterItem, ItemCheckableMultipleBinding>(
+	{ layoutInflater, parent -> ItemCheckableMultipleBinding.inflate(layoutInflater, parent, false) }
+) {
+
+	itemView.setOnClickListener {
+		listener.onTagItemClick(item)
+	}
+
+	bind {
+		binding.root.text = item.tag.title
+		binding.root.isChecked = item.isChecked
+	}
+}
+
+fun filterHeaderDelegate() = adapterDelegateViewBinding<FilterItem.Header, FilterItem, ItemFilterHeaderBinding>(
+	{ layoutInflater, parent -> ItemFilterHeaderBinding.inflate(layoutInflater, parent, false) }
+) {
+
+	bind {
+		binding.root.setText(item.titleResId)
+	}
+}

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

@@ -0,0 +1,48 @@
+package org.koitharu.kotatsu.list.ui.filter
+
+import androidx.recyclerview.widget.DiffUtil
+
+class FilterDiffCallback : DiffUtil.ItemCallback<FilterItem>() {
+
+	override fun areItemsTheSame(oldItem: FilterItem, newItem: FilterItem): Boolean {
+		return when {
+			oldItem.javaClass != newItem.javaClass -> false
+			oldItem is FilterItem.Header && newItem is FilterItem.Header -> {
+				oldItem.titleResId == newItem.titleResId
+			}
+			oldItem is FilterItem.Tag && newItem is FilterItem.Tag -> {
+				oldItem.tag == newItem.tag
+			}
+			oldItem is FilterItem.Sort && newItem is FilterItem.Sort -> {
+				oldItem.order == newItem.order
+			}
+			else -> false
+		}
+	}
+
+	override fun areContentsTheSame(oldItem: FilterItem, newItem: FilterItem): Boolean {
+		return when {
+			oldItem is FilterItem.Header && newItem is FilterItem.Header -> true
+			oldItem is FilterItem.Tag && newItem is FilterItem.Tag -> {
+				oldItem.isChecked == newItem.isChecked
+			}
+			oldItem is FilterItem.Sort && newItem is FilterItem.Sort -> {
+				oldItem.isSelected == newItem.isSelected
+			}
+			else -> false
+		}
+	}
+
+	override fun getChangePayload(oldItem: FilterItem, newItem: FilterItem): Any? {
+		val isCheckedChanged = when {
+			oldItem is FilterItem.Tag && newItem is FilterItem.Tag -> {
+				oldItem.isChecked != newItem.isChecked
+			}
+			oldItem is FilterItem.Sort && newItem is FilterItem.Sort -> {
+				oldItem.isSelected != newItem.isSelected
+			}
+			else -> false
+		}
+		return if (isCheckedChanged) Unit else super.getChangePayload(oldItem, newItem)
+	}
+}

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

@@ -0,0 +1,22 @@
+package org.koitharu.kotatsu.list.ui.filter
+
+import androidx.annotation.StringRes
+import org.koitharu.kotatsu.core.model.MangaTag
+import org.koitharu.kotatsu.core.model.SortOrder
+
+sealed interface FilterItem {
+
+	class Header(
+		@StringRes val titleResId: Int,
+	) : FilterItem
+
+	class Sort(
+		val order: SortOrder,
+		val isSelected: Boolean,
+	) : FilterItem
+
+	class Tag(
+		val tag: MangaTag,
+		val isChecked: Boolean,
+	) : FilterItem
+}

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

@@ -1,18 +0,0 @@
-package org.koitharu.kotatsu.list.ui.filter
-
-import android.view.LayoutInflater
-import android.view.ViewGroup
-import org.koitharu.kotatsu.base.ui.list.BaseViewHolder
-import org.koitharu.kotatsu.core.model.SortOrder
-import org.koitharu.kotatsu.databinding.ItemCheckableSingleBinding
-
-class FilterSortHolder(parent: ViewGroup) :
-	BaseViewHolder<SortOrder, Boolean, ItemCheckableSingleBinding>(
-		ItemCheckableSingleBinding.inflate(LayoutInflater.from(parent.context), parent, false)
-	) {
-
-	override fun onBind(data: SortOrder, extra: Boolean) {
-		binding.root.setText(data.titleRes)
-		binding.root.isChecked = extra
-	}
-}

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

@@ -1,21 +0,0 @@
-package org.koitharu.kotatsu.list.ui.filter
-
-import android.view.LayoutInflater
-import android.view.ViewGroup
-import org.koitharu.kotatsu.base.ui.list.BaseViewHolder
-import org.koitharu.kotatsu.core.model.MangaTag
-import org.koitharu.kotatsu.databinding.ItemCheckableMultipleBinding
-
-class FilterTagHolder(parent: ViewGroup) :
-	BaseViewHolder<MangaTag, Boolean, ItemCheckableMultipleBinding>(
-		ItemCheckableMultipleBinding.inflate(LayoutInflater.from(parent.context), parent, false)
-	) {
-
-	val isChecked: Boolean
-		get() = binding.root.isChecked
-
-	override fun onBind(data: MangaTag, extra: Boolean) {
-		binding.root.text = data.title
-		binding.root.isChecked = extra
-	}
-}

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

@@ -1,8 +1,8 @@
 package org.koitharu.kotatsu.list.ui.filter
 
-import org.koitharu.kotatsu.core.model.MangaFilter
+interface OnFilterChangedListener {
 
-fun interface OnFilterChangedListener {
+	fun onSortItemClick(item: FilterItem.Sort)
 
-	fun onFilterChanged(filter: MangaFilter)
+	fun onTagItemClick(item: FilterItem.Tag)
 }

app/src/main/java/org/koitharu/kotatsu/remotelist/ui/RemoteListFragment.kt

@@ -6,7 +6,6 @@ import android.view.MenuItem
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import org.koin.core.parameter.parametersOf
 import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.model.MangaFilter
 import org.koitharu.kotatsu.core.model.MangaSource
 import org.koitharu.kotatsu.list.ui.MangaListFragment
 import org.koitharu.kotatsu.reader.ui.SimpleSettingsActivity
@@ -29,10 +28,6 @@ class RemoteListFragment : MangaListFragment() {
 		return source.title
 	}
 
-	override fun onFilterChanged(filter: MangaFilter) {
-		viewModel.applyFilter(filter)
-	}
-
 	override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
 		super.onCreateOptionsMenu(menu, inflater)
 		inflater.inflate(R.menu.opt_list_remote, menu)

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

@@ -9,12 +9,10 @@ import org.koitharu.kotatsu.BuildConfig
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.widgets.ChipsView
 import org.koitharu.kotatsu.core.model.Manga
-import org.koitharu.kotatsu.core.model.MangaFilter
-import org.koitharu.kotatsu.core.model.MangaTag
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.core.parser.RemoteMangaRepository
 import org.koitharu.kotatsu.core.prefs.AppSettings
-import org.koitharu.kotatsu.list.ui.MangaFilterConfig
+import org.koitharu.kotatsu.list.domain.AvailableFilters
 import org.koitharu.kotatsu.list.ui.MangaListViewModel
 import org.koitharu.kotatsu.list.ui.model.*
 import org.koitharu.kotatsu.utils.ext.asLiveDataDistinct
@@ -27,7 +25,6 @@ class RemoteListViewModel(
 	private val mangaList = MutableStateFlow<List<Manga>?>(null)
 	private val hasNextPage = MutableStateFlow(false)
 	private val listError = MutableStateFlow<Throwable?>(null)
-	private var appliedFilter: MangaFilter? = null
 	private var loadingJob: Job? = null
 	private val headerModel = ListHeader((repository as RemoteMangaRepository).title, 0)
 
@@ -68,16 +65,6 @@ class RemoteListViewModel(
 		loadList(append = !mangaList.value.isNullOrEmpty())
 	}
 
-	override fun onRemoveFilterTag(tag: MangaTag) {
-		val filter = appliedFilter ?: return
-		if (tag !in filter.tags) {
-			return
-		}
-		applyFilter(
-			filter.copy(tags = filter.tags - tag)
-		)
-	}
-
 	fun loadNextPage() {
 		if (hasNextPage.value && listError.value == null) {
 			loadList(append = true)
@@ -93,8 +80,8 @@ class RemoteListViewModel(
 				listError.value = null
 				val list = repository.getList2(
 					offset = if (append) mangaList.value?.size ?: 0 else 0,
-					sortOrder = appliedFilter?.sortOrder,
-					tags = appliedFilter?.tags,
+					sortOrder = currentFilter.sortOrder,
+					tags = currentFilter.tags,
 				)
 				if (!append) {
 					mangaList.value = list
@@ -111,26 +98,29 @@ class RemoteListViewModel(
 		}
 	}
 
-	fun applyFilter(newFilter: MangaFilter) {
-		appliedFilter = newFilter
+	override fun onFilterChanged() {
+		super.onFilterChanged()
 		mangaList.value = null
 		hasNextPage.value = false
 		loadList(false)
-		filter.value?.run {
-			filter.value = copy(currentFilter = newFilter)
-		}
 	}
 
-	private fun createFilterModel() = appliedFilter?.run {
-		CurrentFilterModel(tags.map { ChipsView.ChipModel(0, it.title, it) })
+	private fun createFilterModel(): CurrentFilterModel? {
+		val tags = currentFilter.tags
+		return if (tags.isEmpty()) {
+			null
+		} else {
+			CurrentFilterModel(tags.map { ChipsView.ChipModel(0, it.title, it) })
+		}
 	}
 
 	private fun loadFilter() {
 		launchJob(Dispatchers.Default) {
 			try {
-				val sorts = repository.sortOrders.sortedBy { it.ordinal }
-				val tags = repository.getTags().sortedBy { it.title }
-				filter.postValue(MangaFilterConfig(sorts, tags, appliedFilter))
+				val sorts = repository.sortOrders
+				val tags = repository.getTags()
+				availableFilters = AvailableFilters(sorts, tags)
+				onFilterChanged()
 			} catch (e: Exception) {
 				if (BuildConfig.DEBUG) {
 					e.printStackTrace()