Fix local source cover changing (#6252)

* fix local source cover changing

* Remove unnecessary check for `exists()`

* fix for when there is no thumbnail_url in the db

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

@@ -56,7 +56,6 @@ class LocalSource(private val context: Context) : CatalogueSource {
             if (cover == null) {
                 cover = File("${dir.absolutePath}/${manga.url}", COVER_NAME)
             }
-            if (!cover.exists()) {
             // It might not exist if using the external SD card
             cover.parentFile?.mkdirs()
             input.use {
@@ -64,7 +63,7 @@ class LocalSource(private val context: Context) : CatalogueSource {
                     input.copyTo(it)
                 }
             }
-            }
+            manga.thumbnail_url = cover.absolutePath
             return cover
         }
 

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

@@ -388,6 +388,8 @@ class MangaPresenter(
                     if (manga.isLocal()) {
                         LocalSource.updateCover(context, manga, it)
                         manga.updateCoverLastModified(db)
+                        db.insertManga(manga).executeAsBlocking()
+                        coverCache.clearMemoryCache()
                     } else if (manga.favorite) {
                         coverCache.setCustomCoverToCache(manga, it)
                         manga.updateCoverLastModified(db)