refactor(android): share native album artist resolution

android/app/src/main/kotlin/com/zarz/spotiflac/NativeDownloadFinalizer.kt

@@ -993,14 +993,7 @@ object NativeDownloadFinalizer {
             .put("title", trackString(input, "name", input.request.optString("track_name", "")))
             .put("artist", trackString(input, "artistName", input.request.optString("artist_name", "")))
             .put("album", trackString(input, "albumName", input.request.optString("album_name", "")))
-            .put(
-                "album_artist",
-                NativeFinalizationPolicy.authoritativeAlbumArtist(
-                    requestValue = requestString(input, "album_artist"),
-                    trackValue = trackString(input, "albumArtist", ""),
-                    providerResultValue = resultString(input, "album_artist"),
-                ),
-            )
+            .put("album_artist", resolvedAlbumArtist(input))
             .put("track_number", trackInt(input, "trackNumber", input.request.optInt("track_number", 0)))
             .put("disc_number", trackInt(input, "discNumber", input.request.optInt("disc_number", 0)))
             .put("isrc", trackString(input, "isrc", input.request.optString("isrc", "")))
@@ -1164,11 +1157,7 @@ object NativeDownloadFinalizer {
         val albumId = trackString(input, "albumId", "")
         if (albumId.isNotBlank()) return "id:$albumId"
         val albumName = trackString(input, "albumName", input.request.optString("album_name", ""))
-        val albumArtist = NativeFinalizationPolicy.authoritativeAlbumArtist(
-            requestValue = requestString(input, "album_artist"),
-            trackValue = trackString(input, "albumArtist", ""),
-            providerResultValue = resultString(input, "album_artist"),
-        )
+        val albumArtist = resolvedAlbumArtist(input)
         return "name:$albumName|$albumArtist"
     }
 
@@ -1187,16 +1176,7 @@ object NativeDownloadFinalizer {
         values.put("track_name", result.optString("title", "").ifBlank { trackString(input, "name", input.request.optString("track_name", "")) })
         values.put("artist_name", result.optString("artist", "").ifBlank { trackString(input, "artistName", input.request.optString("artist_name", "")) })
         values.put("album_name", result.optString("album", "").ifBlank { trackString(input, "albumName", input.request.optString("album_name", "")) })
-        values.put(
-            "album_artist",
-            normalizeOptional(
-                NativeFinalizationPolicy.authoritativeAlbumArtist(
-                    requestValue = requestString(input, "album_artist"),
-                    trackValue = trackString(input, "albumArtist", ""),
-                    providerResultValue = resultString(input, "album_artist"),
-                ),
-            ),
-        )
+        values.put("album_artist", normalizeOptional(resolvedAlbumArtist(input)))
         values.put("cover_url", normalizeOptional(metadataCoverUrl(input).ifBlank { resultString(input, "cover_url") }))
         values.put("file_path", state.filePath)
         values.put("storage_mode", input.request.optString("storage_mode", "app"))
@@ -1303,6 +1283,13 @@ object NativeDownloadFinalizer {
     internal fun resultString(input: FinalizeInput, key: String): String =
         cleanMetadataString(input.result.optString(key, ""))
 
+    internal fun resolvedAlbumArtist(input: FinalizeInput): String =
+        NativeFinalizationPolicy.authoritativeAlbumArtist(
+            requestValue = requestString(input, "album_artist"),
+            trackValue = trackString(input, "albumArtist", ""),
+            providerResultValue = resultString(input, "album_artist"),
+        )
+
     internal fun metadataCoverUrl(input: FinalizeInput): String =
         trackString(input, "coverUrl", requestString(input, "cover_url"))
 

android/app/src/main/kotlin/com/zarz/spotiflac/NativeFinalizerMedia.kt

@@ -8,7 +8,6 @@ import com.zarz.spotiflac.SafDownloadHandler.normalizeExt
 import com.zarz.spotiflac.NativeFinalizationPolicy.applyQualityVariantFilenameLabel
 import com.zarz.spotiflac.NativeFinalizationPolicy.artistTagValue
 import com.zarz.spotiflac.NativeFinalizationPolicy.metadataTagValue
-import com.zarz.spotiflac.NativeFinalizationPolicy.authoritativeAlbumArtist
 import com.zarz.spotiflac.NativeFinalizationPolicy.formatIndexTag
 import com.zarz.spotiflac.NativeFinalizationPolicy.logicalOutputFileName
 import com.zarz.spotiflac.NativeFinalizationPolicy.removeQualityVariantStagingLabel
@@ -251,11 +250,7 @@ internal fun NativeDownloadFinalizer.embedBasicMetadata(context: Context, path:
     val album = resultString(input, "album").ifBlank {
         trackString(input, "albumName", requestString(input, "album_name"))
     }
-    val albumArtist = authoritativeAlbumArtist(
-        requestValue = requestString(input, "album_artist"),
-        trackValue = trackString(input, "albumArtist", ""),
-        providerResultValue = resultString(input, "album_artist"),
-    )
+    val albumArtist = resolvedAlbumArtist(input)
     val date = resultString(input, "release_date").ifBlank {
         resultString(input, "date").ifBlank {
             trackString(input, "releaseDate", requestString(input, "release_date"))