Flatten available extensions with its source (#7956)

* Flatten available extensions with it's source

We should also do something similar for installed extensions

Supersedes #7200

* Dedupe sources

app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionLanguages.kt

@@ -1,6 +1,5 @@
 package eu.kanade.domain.extension.interactor
 
-import eu.kanade.core.util.asFlow
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.extension.ExtensionManager
 import eu.kanade.tachiyomi.util.system.LocaleHelper
@@ -17,7 +16,10 @@ class GetExtensionLanguages(
             extensionManager.getAvailableExtensionsFlow(),
         ) { enabledLanguage, availableExtensions ->
             availableExtensions
-                .map { it.lang }
+                .flatMap { ext ->
+                    if (ext.sources.isEmpty()) listOf(ext.lang)
+                    else ext.sources.map { it.lang }
+                }
                 .distinct()
                 .sortedWith(
                     compareBy(

app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionsByType.kt

@@ -36,9 +36,23 @@ class GetExtensionsByType(
                 .filter { extension ->
                     _installed.none { it.pkgName == extension.pkgName } &&
                         _untrusted.none { it.pkgName == extension.pkgName } &&
-                        extension.lang in _activeLanguages &&
                         (showNsfwSources || extension.isNsfw.not())
                 }
+                .flatMap { ext ->
+                    if (ext.sources.isEmpty()) {
+                        return@flatMap if (ext.lang in _activeLanguages) listOf(ext) else emptyList()
+                    }
+                    ext.sources.filter { it.lang in _activeLanguages }
+                        .map {
+                            ext.copy(
+                                name = it.name,
+                                lang = it.lang,
+                                pkgName = "${ext.pkgName}-${it.id}",
+                                sources = listOf(it),
+                            )
+                        }
+                }
+                .sortedWith(compareBy(String.CASE_INSENSITIVE_ORDER) { it.name })
 
             Extensions(updates, installed, available, untrusted)
         }

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

@@ -86,10 +86,10 @@ class ExtensionsPresenter(
                     .filter(queryFilter(searchQuery))
                     .groupBy { LocaleHelper.getSourceDisplayName(it.lang, context) }
                     .toSortedMap()
-                    .flatMap { (key, value) ->
+                    .flatMap { (lang, exts) ->
                         listOf(
-                            ExtensionUiModel.Header.Text(key),
-                            *value.map(extensionMapper(downloads)).toTypedArray(),
+                            ExtensionUiModel.Header.Text(lang),
+                            *exts.map(extensionMapper(downloads)).toTypedArray(),
                         )
                     }