refactor: Use Subsonic getSong API to fetch song details

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

main.py

@@ -48,26 +48,55 @@ def parse_log_line(line):
 
 async def navidrome_get_song_details(song_id):
     """
-    Gets song details from Navidrome's inspect API.
+    Gets song details from Navidrome's Subsonic API.
     """
     navidrome_url = settings.NAVIDROME_URL
-    if not navidrome_url:
-        logging.error("NAVIDROME_URL must be set in settings.py.")
+    username = settings.NAVIDROME_USER
+
+    if not all([navidrome_url, username]):
+        logging.error("NAVIDROME_URL and NAVIDROME_USER must be set in settings.py.")
         return None
 
-    api_url = f"{navidrome_url.rstrip('/')}/api/inspect"
-    params = {'id': song_id}
+    salt = settings.SUBSONIC_SALT
+    token = settings.SUBSONIC_TOKEN
+
+    if not all([salt, token]):
+        password = settings.NAVIDROME_PASSWORD
+        if not password:
+            logging.error("Either (SUBSONIC_SALT and SUBSONIC_TOKEN) or NAVIDROME_PASSWORD must be set in settings.py.")
+            return None
+
+        # Subsonic API requires a salt and a token (md5(password + salt))
+        salt = ''.join(random.choice(string.ascii_lowercase + string.digits) for _ in range(10))
+        token = hashlib.md5((password + salt).encode('utf-8')).hexdigest()
+
+    params = {
+        'u': username,
+        't': token,
+        's': salt,
+        'v': '1.16.1',
+        'c': 'heart-monitor',
+        'f': 'json',
+        'id': song_id,
+    }
+
+    api_url = f"{navidrome_url.rstrip('/')}/rest/getSong"
 
     try:
         async with aiohttp.ClientSession() as session:
             async with session.get(api_url, params=params) as response:
                 response.raise_for_status()
                 data = await response.json()
-                return data
     except aiohttp.ClientError as e:
-        logging.error(f"Error calling Navidrome inspect API for song {song_id}: {e}")
+        logging.error(f"Error calling Navidrome getSong API for song {song_id}: {e}")
         return None
 
+    if data.get('subsonic-response', {}).get('status') != 'ok':
+        logging.error(f"Failed to get song details for song {song_id}. Response: {data}")
+        return None
+
+    return data.get('subsonic-response', {}).get('song')
+
 
 async def navidrome_set_rating(song_id):
     navidrome_url = settings.NAVIDROME_URL
@@ -121,10 +150,9 @@ async def navidrome_set_rating(song_id):
         logging.info(f"Successfully set rating for song {song_id} to 1, but couldn't get song details.")
         return
 
-    raw_tags = details.get('rawTags', {})
-    title = raw_tags.get('title', ['Unknown Title'])[0]
-    artist = raw_tags.get('artist', ['Unknown Artist'])[0]
-    album = raw_tags.get('album', ['Unknown Album'])[0]
+    title = details.get('title', 'Unknown Title')
+    artist = details.get('artist', 'Unknown Artist')
+    album = details.get('album', 'Unknown Album')
     logging.info(f'Set song "{title}" - {artist} ({album}) rating to 1.')