Unify ID3 post-processor, move add_tags() code into run()

backend/id3pp.py

@@ -5,18 +5,6 @@ from yt_dlp.postprocessor import PostProcessor
 ENC_UTF8 = 3
 
 
-def add_tags(file: mp3.MP3, info: dict[str, str | int]) -> None:
-
-    file['TIT2'] = id3.TIT2(encoding=ENC_UTF8, text=info['track'])
-    file['TPE1'] = id3.TPE1(encoding=ENC_UTF8, text=info['artist'])
-    if 'album' in info:
-        file['TALB'] = id3.TALB(encoding=ENC_UTF8, text=info['album'])
-    if 'release_year' in info:
-        file['TDRC'] = id3.TDRC(encoding=ENC_UTF8, text=str(info['release_year']))
-    if 'track_number' in info:
-        file['TRCK'] = id3.TRCK(encoding=ENC_UTF8, text=str(info['track_number']))
-
-
 class InfoYouTubePP(PostProcessor):
     '''Generates YT Music fields in info if necessary.
     Must be run before downloading and post-processing with
@@ -48,15 +36,23 @@ class InfoYouTubePP(PostProcessor):
         return [], information
 
 
-class ID3YouTubePP(PostProcessor):
-    '''Inserts ID3 tags after InfoYouTubePP and FFmpegExtractAudioPP,
+class ID3TagsPP(PostProcessor):
+    '''Inserts ID3 tags after all PPs (for YT: InfoYouTubePP and FFmpegExtractAudioPP),
     triggers searching and parsing lyrics from Genius'''
 
     def run(self, information):
 
-        add_tags(
-            mp3.MP3(information['filepath']),
-            information,
-        )
+        file = mp3.MP3(information['filepath'])
+
+        file['TIT2'] = id3.TIT2(encoding=ENC_UTF8, text=information['track'])
+        file['TPE1'] = id3.TPE1(encoding=ENC_UTF8, text=information['artist'])
+        if 'album' in information:
+            file['TALB'] = id3.TALB(encoding=ENC_UTF8, text=information['album'])
+        if 'release_year' in information:
+            file['TDRC'] = id3.TDRC(encoding=ENC_UTF8, text=str(information['release_year']))
+        if 'track_number' in information:
+            file['TRCK'] = id3.TRCK(encoding=ENC_UTF8, text=str(information['track_number']))
+
+        # TODO: lyrics file["USLT"]
 
         return [], information