Reimplement extensions search

Not sure if I should abstract this out to per-tab though. Maybe when we need it...

app/src/main/java/eu/kanade/presentation/components/TabbedScreen.kt

@@ -21,6 +21,8 @@ fun TabbedScreen(
     @StringRes titleRes: Int,
     tabs: List<TabContent>,
     startIndex: Int? = null,
+    searchQuery: String? = null,
+    onChangeSearchQuery: (String?) -> Unit = {},
     incognitoMode: Boolean,
     downloadedOnlyMode: Boolean,
 ) {
@@ -35,12 +37,27 @@ fun TabbedScreen(
 
     Scaffold(
         topBar = {
+            if (searchQuery == null) {
                 AppBar(
                     title = stringResource(titleRes),
                     actions = {
                         AppBarActions(tabs[state.currentPage].actions)
                     },
                 )
+            } else {
+                SearchToolbar(
+                    searchQuery = searchQuery,
+                    onChangeSearchQuery = {
+                        onChangeSearchQuery(it)
+                    },
+                    onClickCloseSearch = {
+                        onChangeSearchQuery(null)
+                    },
+                    onClickResetSearch = {
+                        onChangeSearchQuery("")
+                    },
+                )
+            }
         },
     ) { paddingValues ->
         Column(modifier = Modifier.padding(paddingValues)) {

app/src/main/java/eu/kanade/tachiyomi/ui/browse/BrowseController.kt

@@ -5,6 +5,8 @@ import android.os.Bundle
 import android.view.View
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
 import androidx.core.os.bundleOf
 import eu.kanade.presentation.components.TabbedScreen
 import eu.kanade.tachiyomi.R
@@ -31,6 +33,8 @@ class BrowseController : FullComposeController<BrowsePresenter>, RootController
 
     @Composable
     override fun ComposeContent() {
+        val query by presenter.extensionsPresenter.query.collectAsState()
+
         TabbedScreen(
             titleRes = R.string.browse,
             tabs = listOf(
@@ -39,6 +43,8 @@ class BrowseController : FullComposeController<BrowsePresenter>, RootController
                 migrateSourcesTab(router, presenter.migrationSourcesPresenter),
             ),
             startIndex = 1.takeIf { toExtensions },
+            searchQuery = query,
+            onChangeSearchQuery = { presenter.extensionsPresenter.search(it) },
             incognitoMode = presenter.isIncognitoMode,
             downloadedOnlyMode = presenter.isDownloadOnly,
         )

app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionsPresenter.kt

@@ -16,6 +16,8 @@ import eu.kanade.tachiyomi.util.lang.launchIO
 import eu.kanade.tachiyomi.util.system.LocaleHelper
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.launchIn
@@ -33,7 +35,8 @@ class ExtensionsPresenter(
     private val getExtensions: GetExtensionsByType = Injekt.get(),
 ) : ExtensionsState by state {
 
-    private val _query: MutableStateFlow<String> = MutableStateFlow("")
+    private val _query: MutableStateFlow<String?> = MutableStateFlow(null)
+    val query: StateFlow<String?> = _query.asStateFlow()
 
     private var _currentDownloads = MutableStateFlow<Map<String, InstallStep>>(hashMapOf())
 
@@ -77,8 +80,10 @@ class ExtensionsPresenter(
                 getExtensions.subscribe(),
                 _currentDownloads,
             ) { query, (_updates, _installed, _available, _untrusted), downloads ->
+                val searchQuery = query ?: ""
+
                 val languagesWithExtensions = _available
-                    .filter(queryFilter(query))
+                    .filter(queryFilter(searchQuery))
                     .groupBy { LocaleHelper.getSourceDisplayName(it.lang, context) }
                     .toSortedMap()
                     .flatMap { (key, value) ->
@@ -90,14 +95,14 @@ class ExtensionsPresenter(
 
                 val items = mutableListOf<ExtensionUiModel>()
 
-                val updates = _updates.filter(queryFilter(query)).map(extensionMapper(downloads))
+                val updates = _updates.filter(queryFilter(searchQuery)).map(extensionMapper(downloads))
                 if (updates.isNotEmpty()) {
                     items.add(ExtensionUiModel.Header.Resource(R.string.ext_updates_pending))
                     items.addAll(updates)
                 }
 
-                val installed = _installed.filter(queryFilter(query)).map(extensionMapper(downloads))
+                val installed = _installed.filter(queryFilter(searchQuery)).map(extensionMapper(downloads))
-                val untrusted = _untrusted.filter(queryFilter(query)).map(extensionMapper(downloads))
+                val untrusted = _untrusted.filter(queryFilter(searchQuery)).map(extensionMapper(downloads))
                 if (installed.isNotEmpty() || untrusted.isNotEmpty()) {
                     items.add(ExtensionUiModel.Header.Resource(R.string.ext_installed))
                     items.addAll(installed)
@@ -122,7 +127,7 @@ class ExtensionsPresenter(
             .launchIn(presenterScope)
     }
 
-    fun search(query: String) {
+    fun search(query: String?) {
         presenterScope.launchIO {
             _query.emit(query)
         }

app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionsTab.kt

@@ -25,10 +25,7 @@ fun extensionsTab(
         AppBar.Action(
             title = stringResource(R.string.action_search),
             icon = Icons.Outlined.Search,
-            onClick = {
+            onClick = { presenter.search("") },
-                // TODO: extensions search
-                // presenter.search(query)
-            },
         ),
 
         AppBar.Action(