Add filtering options for pinned sources and empty results in search menu

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/multi/SearchActivity.kt

@@ -94,7 +94,7 @@ class SearchActivity :
 		setDisplayHomeAsUp(isEnabled = true, showUpAsClose = false)
 		supportActionBar?.setSubtitle(R.string.search_results)
 
-		addMenuProvider(SearchKindMenuProvider(this, viewModel.query, viewModel.kind))
+		addMenuProvider(SearchKindMenuProvider(this, viewModel, viewModel.query, viewModel.kind))
 
 		viewModel.list.observe(this, adapter)
 		viewModel.onError.observeEvent(this, SnackbarErrorObserver(viewBinding.recyclerView, null))

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/multi/SearchKindMenuProvider.kt

@@ -11,8 +11,9 @@ import org.koitharu.kotatsu.search.domain.SearchKind
 
 class SearchKindMenuProvider(
 	private val activity: SearchActivity,
+	private val viewModel: SearchViewModel,
 	private val query: String,
-	private val kind: SearchKind
+	private val kind: SearchKind,
 ) : MenuProvider {
 
 	override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
@@ -32,6 +33,20 @@ class SearchKindMenuProvider(
 	}
 
 	override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
+		when (menuItem.itemId) {
+			R.id.action_filter_pinned_only -> {
+				menuItem.isChecked = !menuItem.isChecked
+				viewModel.setPinnedOnly(menuItem.isChecked)
+				return true
+			}
+
+			R.id.action_filter_hide_empty -> {
+				menuItem.isChecked = !menuItem.isChecked
+				viewModel.setHideEmpty(menuItem.isChecked)
+				return true
+			}
+		}
+
 		val newKind = when (menuItem.itemId) {
 			R.id.action_kind_simple -> SearchKind.SIMPLE
 			R.id.action_kind_title -> SearchKind.TITLE

app/src/main/kotlin/org/koitharu/kotatsu/search/ui/multi/SearchViewModel.kt

@@ -62,6 +62,8 @@ class SearchViewModel @Inject constructor(
 	val kind = savedStateHandle.get<SearchKind>(AppRouter.KEY_KIND) ?: SearchKind.SIMPLE
 
 	private var includeDisabledSources = MutableStateFlow(false)
+	private var pinnedOnly = MutableStateFlow(false)
+	private var hideEmpty = MutableStateFlow(false)
 	private val results = MutableStateFlow<List<SearchResultsListModel>>(emptyList())
 
 	private var searchJob: Job? = null
@@ -70,9 +72,15 @@ class SearchViewModel @Inject constructor(
 		results,
 		isLoading.dropWhile { !it },
 		includeDisabledSources,
-	) { list, loading, includeDisabled ->
+		hideEmpty,
+	) { list, loading, includeDisabled, hideEmptyVal ->
+		val filteredList = if (hideEmptyVal) {
+			list.filter { it.list.isNotEmpty() }
+		} else {
+			list
+		}
 		when {
-			list.isEmpty() -> listOf(
+			filteredList.isEmpty() -> listOf(
 				when {
 					loading -> LoadingState
 					else -> EmptyState(
@@ -84,9 +92,9 @@ class SearchViewModel @Inject constructor(
 				},
 			)
 
-			loading -> list + LoadingFooter()
-			includeDisabled -> list
-			else -> list + ButtonFooter(R.string.search_disabled_sources)
+			loading -> filteredList + LoadingFooter()
+			includeDisabled -> filteredList
+			else -> filteredList + ButtonFooter(R.string.search_disabled_sources)
 		}
 	}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, listOf(LoadingState))
 
@@ -114,6 +122,17 @@ class SearchViewModel @Inject constructor(
 		doSearch()
 	}
 
+	fun setPinnedOnly(value: Boolean) {
+		if (pinnedOnly.value != value) {
+			pinnedOnly.value = value
+			retry()
+		}
+	}
+
+	fun setHideEmpty(value: Boolean) {
+		hideEmpty.value = value
+	}
+
 	fun continueSearch() {
 		if (includeDisabledSources.value) {
 			return
@@ -122,8 +141,12 @@ class SearchViewModel @Inject constructor(
 		searchJob = launchLoadingJob(Dispatchers.Default) {
 			includeDisabledSources.value = true
 			prevJob?.join()
-			val sources = sourcesRepository.getDisabledSources()
-				.sortedByDescending { it.priority() }
+			val sources = if (pinnedOnly.value) {
+				emptyList()
+			} else {
+				sourcesRepository.getDisabledSources()
+					.sortedByDescending { it.priority() }
+			}
 			val semaphore = Semaphore(MAX_PARALLELISM)
 			sources.map { source ->
 				launch {
@@ -142,7 +165,11 @@ class SearchViewModel @Inject constructor(
 			appendResult(searchHistory())
 			appendResult(searchFavorites())
 			appendResult(searchLocal())
-			val sources = sourcesRepository.getEnabledSources()
+			val sources = if (pinnedOnly.value) {
+				sourcesRepository.getPinnedSources().toList()
+			} else {
+				sourcesRepository.getEnabledSources()
+			}
 			val semaphore = Semaphore(MAX_PARALLELISM)
 			sources.map { source ->
 				launch {

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

@@ -33,6 +33,20 @@
 					android:title="@string/genre" />
 
 			</group>
+
+			<group android:id="@+id/group_search_filters">
+
+				<item
+					android:id="@+id/action_filter_pinned_only"
+					android:checkable="true"
+					android:title="@string/pinned_sources_only" />
+
+				<item
+					android:id="@+id/action_filter_hide_empty"
+					android:checkable="true"
+					android:title="@string/hide_empty_sources" />
+
+			</group>
 		</menu>
 
 	</item>

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

@@ -210,6 +210,8 @@
     <string name="disabled">Disabled</string>
     <string name="reset_filter">Reset filter</string>
     <string name="enter_name">Enter name</string>
+    <string name="pinned_sources_only">Pinned sources only</string>
+    <string name="hide_empty_sources">Hide empty sources</string>
     <string name="onboard_text">Select languages which you want to read manga. You can change it later in settings.</string>
     <string name="never">Never</string>
     <string name="only_using_wifi">Only on Wi-Fi</string>