#173 Implement PlaylistId

librespot/core.py

@@ -11,8 +11,8 @@ from librespot.audio.storage import ChannelManager
 from librespot.cache import CacheManager
 from librespot.crypto import CipherPair, DiffieHellman, Packet
 from librespot.mercury import MercuryClient, MercuryRequests, RawMercuryRequest
-from librespot.metadata import AlbumId, ArtistId, EpisodeId, ShowId, TrackId
+from librespot.metadata import AlbumId, ArtistId, EpisodeId, ShowId, TrackId, PlaylistId
-from librespot.proto import Authentication_pb2 as Authentication, ClientToken_pb2 as ClientToken, Connect_pb2 as Connect, Connectivity_pb2 as Connectivity, Keyexchange_pb2 as Keyexchange, Metadata_pb2 as Metadata
+from librespot.proto import Authentication_pb2 as Authentication, ClientToken_pb2 as ClientToken, Connect_pb2 as Connect, Connectivity_pb2 as Connectivity, Keyexchange_pb2 as Keyexchange, Metadata_pb2 as Metadata, Playlist4External_pb2 as Playlist4External
 from librespot.proto.ExplicitContentPubsub_pb2 import UserAttributesUpdate
 from librespot.structure import Closeable, MessageListener, RequestListener, SubListener
 import base64
@@ -154,6 +154,18 @@ class ApiClient(Closeable):
         proto.ParseFromString(body)
         return proto
 
+    def get_playlist(self, _id: PlaylistId) -> Playlist4External.SelectedListContent:
+        response = self.send("GET",
+                             "/playlist/v2/playlist/{}".format(_id.id()), None,
+                             None)
+        ApiClient.StatusCodeException.check_status(response)
+        body = response.content
+        if body is None:
+            raise IOError()
+        proto = Playlist4External.SelectedListContent()
+        proto.ParseFromString(body)
+        return proto
+
     def set_client_token(self, client_token):
         self.__client_token_str = client_token
 

librespot/metadata.py

@@ -62,6 +62,29 @@ class PlayableId:
         raise NotImplementedError
 
 
+class PlaylistId(SpotifyId):
+    base62 = Base62.create_instance_with_inverted_character_set()
+    pattern = re.compile(r"spotify:playlist:(.{22})")
+    __id: str
+
+    def __init__(self, _id: str):
+        self.__id = _id
+
+    @staticmethod
+    def from_uri(uri: str) -> PlaylistId:
+        matcher = PlaylistId.pattern.search(uri)
+        if matcher is not None:
+            playlist_id = matcher.group(1)
+            return PlaylistId(playlist_id)
+        raise TypeError("Not a Spotify playlist ID: {}.".format(uri))
+
+    def id(self) -> str:
+        return self.__id
+
+    def to_spotify_uri(self) -> str:
+        return "spotify:playlist:" + self.__id
+
+
 class UnsupportedId(PlayableId):
     uri: str