Add UnmeteredSource interface

To be included in extension-lib 1.3 (or whatever it's going to be). This applies to sources like Komga or Lanragi, where large numbers of update/download aren't of concern since they're (usually) self-hosted.

app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt

@@ -13,6 +13,7 @@ import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.download.model.Download
 import eu.kanade.tachiyomi.data.download.model.DownloadQueue
 import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.source.UnmeteredSource
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.source.online.fetchAllImageUrlsFromPageList
@@ -266,7 +267,10 @@ class Downloader(
 
             // Start downloader if needed
             if (autoStart && wasEmpty) {
-                val maxDownloadsFromSource = queue.groupBy { it.source }.maxOf { it.value.size }
+                val maxDownloadsFromSource = queue
+                    .groupBy { it.source }
+                    .filterKeys { it !is UnmeteredSource }
+                    .maxOf { it.value.size }
                 if (maxDownloadsFromSource > CHAPTERS_PER_SOURCE_QUEUE_WARNING_THRESHOLD) {
                     withUIContext {
                         context.toast(R.string.download_queue_size_warning, Toast.LENGTH_LONG)

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -25,6 +25,7 @@ import eu.kanade.tachiyomi.data.track.EnhancedTrackService
 import eu.kanade.tachiyomi.data.track.TrackManager
 import eu.kanade.tachiyomi.data.track.TrackService
 import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.source.UnmeteredSource
 import eu.kanade.tachiyomi.source.model.SManga
 import eu.kanade.tachiyomi.source.model.toSChapter
 import eu.kanade.tachiyomi.source.model.toSManga
@@ -267,7 +268,10 @@ class LibraryUpdateService(
             .sortedWith(rankingScheme[selectedScheme])
 
         // Warn when excessively checking a single source
-        val maxUpdatesFromSource = mangaToUpdate.groupBy { it.source }.maxOfOrNull { it.value.size } ?: 0
+        val maxUpdatesFromSource = mangaToUpdate
+            .groupBy { it.source }
+            .filterKeys { sourceManager.get(it) !is UnmeteredSource }
+            .maxOfOrNull { it.value.size } ?: 0
         if (maxUpdatesFromSource > MANGA_PER_SOURCE_QUEUE_WARNING_THRESHOLD) {
             toast(R.string.notification_size_warning, Toast.LENGTH_LONG)
         }

app/src/main/java/eu/kanade/tachiyomi/source/LocalSource.kt

@@ -38,7 +38,8 @@ import java.util.Locale
 import java.util.concurrent.TimeUnit
 import java.util.zip.ZipFile
 
-class LocalSource(private val context: Context) : CatalogueSource {
+class LocalSource(private val context: Context) : CatalogueSource, UnmeteredSource {
+
     companion object {
         const val ID = 0L
         const val HELP_URL = "https://tachiyomi.org/help/guides/local-manga/"

app/src/main/java/eu/kanade/tachiyomi/source/UnmeteredSource.kt

@@ -0,0 +1,8 @@
+package eu.kanade.tachiyomi.source
+
+/**
+ * A source that explicitly doesn't require traffic considerations.
+ *
+ * This typically applies for self-hosted sources.
+ */
+interface UnmeteredSource