Add a few source helper functions

app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupManager.kt

@@ -180,8 +180,8 @@ class FullBackupManager(context: Context) : AbstractBackupManager(context) {
             }
         }
 
-        val source = sourceManager.get(manga.source)?.getMainSource()
+        val source = sourceManager.get(manga.source)?.getMainSource<MetadataSource<*, *>>()
-        if (source is MetadataSource<*, *>) {
+        if (source != null) {
             manga.id?.let { mangaId ->
                 databaseHelper.getFlatMetadataForManga(mangaId).executeAsBlocking()?.let { flatMetadata ->
                     mangaObject.flatMetadata = BackupFlatMetadata.copyFrom(flatMetadata)

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

@@ -57,6 +57,7 @@ import eu.kanade.tachiyomi.widget.EmptyView
 import eu.kanade.tachiyomi.widget.materialdialogs.setTextInput
 import exh.log.xLogW
 import exh.savedsearches.EXHSavedSearch
+import exh.source.anyIs
 import exh.source.getMainSource
 import exh.source.isEhBasedSource
 import exh.widget.preference.MangadexLoginDialog
@@ -169,8 +170,8 @@ open class BrowseSourceController(bundle: Bundle) :
         binding.progress.isVisible = true
 
         // SY -->
-        val mainSource = presenter.source.getMainSource()
+        val mainSource = presenter.source.getMainSource<LoginSource>()
-        if (mainSource is LoginSource && mainSource.requiresLogin && !mainSource.isLogged()) {
+        if (mainSource != null && mainSource.requiresLogin && !mainSource.isLogged()) {
             val dialog = MangadexLoginDialog(mainSource)
             dialog.showDialog(router)
         }
@@ -438,7 +439,7 @@ open class BrowseSourceController(bundle: Bundle) :
         menu.findItem(R.id.action_local_source_help)?.isVisible = isLocalSource
 
         // SY -->
-        menu.findItem(R.id.action_settings)?.isVisible = presenter.source is ConfigurableSource
+        menu.findItem(R.id.action_settings)?.isVisible = presenter.source.anyIs<ConfigurableSource>()
         // SY <--
     }
 

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

@@ -118,8 +118,8 @@ class SourceFilterSheet(
 
         init {
             // SY -->
-            val mainSource = source?.getMainSource()
+            val mainSource = source?.getMainSource<BrowseSourceFilterHeader>()
-            if (mainSource is BrowseSourceFilterHeader && controller != null) {
+            if (mainSource != null && controller != null) {
                 adapters += mainSource.getFilterHeader(controller) { dismissSheet?.invoke() }
             }
             adapters += savedSearchesAdapter

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt

@@ -302,8 +302,8 @@ class MangaController :
         chaptersHeaderAdapter = MangaChaptersHeaderAdapter(this)
         chaptersAdapter = ChaptersAdapter(this, view.context)
         // SY -->
-        val mainSource = presenter.source.getMainSource()
+        val mainSource = presenter.source.getMainSource<MetadataSource<*, *>>()
-        if (mainSource is MetadataSource<*, *>) {
+        if (mainSource != null) {
             mangaMetaInfoAdapter = mainSource.getDescriptionAdapter(this)
         }
         if (!preferences.recommendsInOverflow().get() || smartSearchConfig != null) {
@@ -556,8 +556,8 @@ class MangaController :
 
     // SY -->
     fun onNextMetaInfo(flatMetadata: FlatMetadata) {
-        val mainSource = presenter.source.getMainSource()
+        val mainSource = presenter.source.getMainSource<MetadataSource<*, *>>()
-        if (mainSource is MetadataSource<*, *>) {
+        if (mainSource != null) {
             presenter.meta = flatMetadata.raise(mainSource.metaClass)
             mangaMetaInfoAdapter?.notifyDataSetChanged()
             updateFilterIconState()

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -247,8 +247,8 @@ class ReaderPresenter(
             .observeOn(AndroidSchedulers.mainThread())
             // SY -->
             .flatMap { manga ->
-                val source = sourceManager.get(manga.source)?.getMainSource()
+                val source = sourceManager.get(manga.source)?.getMainSource<MetadataSource<*, *>>()
-                if (manga.initialized && source is MetadataSource<*, *>) {
+                if (manga.initialized && source != null) {
                     db.getFlatMetadataForManga(mangaId).asRxSingle().map {
                         manga to it?.raise(source.metaClass)
                     }.toObservable()

app/src/main/java/exh/GalleryAdder.kt

@@ -37,8 +37,7 @@ class GalleryAdder {
     fun pickSource(url: String): List<UrlImportableSource> {
         val uri = url.toUri()
         return sourceManager.getVisibleCatalogueSources()
-            .map { it.getMainSource() }
+            .mapNotNull { it.getMainSource<UrlImportableSource>() }
-            .filterIsInstance<UrlImportableSource>()
             .filter {
                 it.lang in filters.first && it.id !in filters.second && try {
                     it.matchesUri(uri)
@@ -71,8 +70,7 @@ class GalleryAdder {
                 }
             } else {
                 sourceManager.getVisibleCatalogueSources()
-                    .map { it.getMainSource() }
+                    .mapNotNull { it.getMainSource<UrlImportableSource>() }
-                    .filterIsInstance<UrlImportableSource>()
                     .find {
                         it.lang in filters.first && it.id !in filters.second && try {
                             it.matchesUri(uri)

app/src/main/java/exh/md/utils/MdUtil.kt

@@ -318,8 +318,7 @@ class MdUtil {
 
             return sourceManager.getVisibleOnlineSources()
                 .asSequence()
-                .map { it.getMainSource() }
+                .mapNotNull { it.getMainSource<MangaDex>() }
-                .filterIsInstance<MangaDex>()
                 .filter { it.lang in languages }
                 .filterNot { it.id.toString() in disabledSourceIds }
                 .toList()

app/src/main/java/exh/source/SourceHelper.kt

@@ -107,6 +107,13 @@ fun Source.getMainSource(): Source = if (this is EnhancedHttpSource) {
     this
 }
 
+@JvmName("getMainSourceInline")
+inline fun <reified T : Source> Source.getMainSource(): T? = if (this is EnhancedHttpSource) {
+    this.source() as? T
+} else {
+    this as? T
+}
+
 fun Source.getOriginalSource(): Source = if (this is EnhancedHttpSource) {
     this.originalSource
 } else {
@@ -118,3 +125,11 @@ fun Source.getEnhancedSource(): Source = if (this is EnhancedHttpSource) {
 } else {
     this
 }
+
+inline fun <reified T> Source.anyIs(): Boolean {
+    return if (this is EnhancedHttpSource) {
+        originalSource is T || enhancedSource is T
+    } else {
+        this is T
+    }
+}

app/src/main/java/exh/ui/metadata/MetadataViewPresenter.kt

@@ -30,8 +30,8 @@ class MetadataViewPresenter(
 
         launchIO {
             val flatMetadata = db.getFlatMetadataForManga(manga.id!!).executeOnIO() ?: return@launchIO
-            val mainSource = source.getMainSource()
+            val mainSource = source.getMainSource<MetadataSource<*, *>>()
-            if (mainSource is MetadataSource<*, *>) {
+            if (mainSource != null) {
                 meta.value = flatMetadata.raise(mainSource.metaClass)
             }
         }