feat: api endpoint for reading all available playlists

software/src/app.py

@@ -193,3 +193,6 @@ class PlayerApp:
 
     def get_nfc(self):
         return self.nfc
+
+    def get_playlist_db(self):
+        return self.playlist_db

software/src/utils/playlistdb.py

@@ -251,6 +251,16 @@ class BTreeDB(IPlaylistDB):
         if flush:
             self._flush()
 
+    def getPlaylistTags(self):
+        """
+        Get a keys-only dict of all defined playlists. Playlists currently do not have names, but are identified by
+        their tag.
+        """
+        playlist_tags = set()
+        for item in self.db:
+            playlist_tags.add(item.split(b'/')[0])
+        return playlist_tags
+
     def getPlaylistForTag(self, tag: bytes):
         """
         Lookup the playlist for 'tag' and return the Playlist object. Return None if no playlist exists for the given

software/src/webserver.py

@@ -12,14 +12,15 @@ server = None
 config = None
 app = None
 nfc = None
-
+playlist_db = None
 
 def start_webserver(config_, app_):
-    global server, config, app, nfc
+    global server, config, app, nfc, playlist_db
     server = asyncio.create_task(webapp.start_server(port=80))
     config = config_
     app = app_
     nfc = app.get_nfc()
+    playlist_db = app.get_playlist_db()
 
 
 @webapp.before_request
@@ -72,3 +73,8 @@ async def config_put(request):
 async def last_tag_uid_get(request):
     tag, _ = nfc.get_last_uid()
     return {'tag': tag}
+
+
+@webapp.route('/api/v1/playlists', methods=['GET'])
+async def playlists_get(request):
+    return sorted(playlist_db.getPlaylistTags())