Include UPC in Spotify song metadata

votify/interface/song.py

@@ -110,10 +110,11 @@ class SpotifySongInterface(SpotifyAudioInterface):
     ) -> MediaTags:
         release_date = album_data["date"]
 
-        (composer, producer), (album_artist, artist, isrc, label) = (
+        (composer, producer), (album_artist, artist, isrc, label), upc = (
             await asyncio.gather(
                 self._get_composer_producer(track_data["uri"].split(":")[-1]),
                 self._get_isrc_label(track_data["uri"].split(":")[-1]),
+                self._get_upc(album_data["uri"].split(":")[-1]),
             )
         )
 
@@ -145,6 +146,7 @@ class SpotifySongInterface(SpotifyAudioInterface):
             rating=rating,
             track=track_data["trackNumber"],
             track_total=track_total,
+            upc=upc,
             url=f"https://open.spotify.com/track/{track_data['uri'].split(':')[-1]}",
         )
 
@@ -259,3 +261,20 @@ class SpotifySongInterface(SpotifyAudioInterface):
             synced="\n".join(synced_lines) if synced_lines else None,
             unsynced="\n".join(unsynced_lines) + "\n" if unsynced_lines else None,
         )
+
+    async def _get_upc(
+        self,
+        album_id: str,
+    ) -> str | None:
+        album_gid = await self.api.get_gid_metadata(album_id, "album")
+
+        upc = next(
+            (
+                external_id["id"]
+                for external_id in album_gid.get("external_id", [])
+                if external_id["type"] == "upc"
+            ),
+            None,
+        )
+
+        return upc

votify/interface/types.py

@@ -67,6 +67,7 @@ class MediaTags:
     title: str = None
     track: int = None
     track_total: int = None
+    upc: str = None
     url: str = None
 
     def as_mp4_tags(self, date_format: str = None) -> dict[str, list[Any]]:
@@ -126,6 +127,9 @@ class MediaTags:
             "\xa9nam": self.title,
             "trkn": track_mp4,
             "\xa9url": self.url,
+            "----:com.apple.iTunes:UPC": (
+                MP4FreeForm(self.upc.encode("utf-8")) if self.upc is not None else None
+            ),
         }
         return {
             k: ([v] if not isinstance(v, (list, bool)) else v)
@@ -163,6 +167,7 @@ class MediaTags:
             "TRACKNUMBER": [str(self.track)],
             "TRACKTOTAL": [str(self.track_total)],
             "URL": [self.url],
+            "UPC": [self.upc],
         }
         return {k: v for k, v in flac_tags.items() if v[0] is not None}