Filter out empty genres before saving manga to database (#7655)

(cherry picked from commit 4efb736e56)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.kt
#	app/src/main/java/eu/kanade/tachiyomi/source/model/SManga.kt
(cherry picked from commit 702fdb054a)

app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.kt

@@ -34,11 +34,6 @@ interface Manga : SManga {
         return chapter_flags and CHAPTER_SORT_MASK == CHAPTER_SORT_DESC
     }
 
-    fun getGenres(): List<String>? {
-        if (genre.isNullOrBlank()) return null
-        return genre?.split(", ")?.map { it.trim() }?.filterNot { it.isBlank() }?.distinct()
-    }
-
     // SY -->
     fun getOriginalGenres(): List<String>? {
         return originalGenre?.split(", ")?.map { it.trim() }

app/src/main/java/eu/kanade/tachiyomi/source/model/SManga.kt

@@ -28,6 +28,11 @@ interface SManga : Serializable {
 
     var initialized: Boolean
 
+    fun getGenres(): List<String>? {
+        if (genre.isNullOrBlank()) return null
+        return genre?.split(", ")?.map { it.trim() }?.filterNot { it.isBlank() }?.distinct()
+    }
+
     // SY -->
     val originalTitle: String
         get() = (this as? MangaImpl)?.ogTitle ?: title
@@ -104,7 +109,7 @@ fun SManga.toMangaInfo(): MangaInfo {
         artist = this.artist ?: "",
         author = this.author ?: "",
         description = this.description ?: "",
-        genres = this.genre?.split(", ") ?: emptyList(),
+        genres = this.getGenres() ?: emptyList(),
         status = this.status,
         cover = this.thumbnail_url ?: "",
     )