Add backend-independent models

mopidy/models.py

@@ -0,0 +1,130 @@
+from copy import copy
+
+class Artist(object):
+    def __init__(self, uri=None, name=None):
+        self._uri = None
+        self._name = name
+
+    @property
+    def uri(self):
+        return self._uri
+
+    @property
+    def name(self):
+        return self._name
+
+
+class Album(object):
+    def __init__(self, uri=None, name=None, artists=None, num_tracks=0):
+        self._uri = uri
+        self._name = name
+        self._artists = artists or []
+        self._num_tracks = num_tracks
+
+    @property
+    def uri(self):
+        return self._uri
+
+    @property
+    def name(self):
+        return self._name
+
+    @property
+    def artists(self):
+        return copy(self._artists)
+
+    @property
+    def num_tracks(self):
+        return self._num_tracks
+
+
+class Track(object):
+    def __init__(self, uri=None, title=None, artists=None, album=None,
+            track_no=0, date=None, length=None, id=None):
+        self._uri = uri
+        self._title = title
+        self._artists = artists or []
+        self._album = album
+        self._track_no = track_no
+        self._date = date
+        self._length = length
+        self._id = id
+
+    @property
+    def uri(self):
+        return self._uri
+
+    @property
+    def title(self):
+        return self._title
+
+    @property
+    def artists(self):
+        return copy(self._artists)
+
+    @property
+    def album(self):
+        return self._album
+
+    @property
+    def track_no(self):
+        return self._track_no
+
+    @property
+    def date(self):
+        return self._date
+
+    @property
+    def length(self):
+        return self._length
+
+    @property
+    def id(self):
+        return self._id
+
+    def mpd_format(self, position=0):
+        return [
+            ('file', self.uri),
+            ('Time', self.length // 1000),
+            ('Artist', self.mpd_format_artists()),
+            ('Title', self.title),
+            ('Album', self.album.name),
+            ('Track', '%d/%d' % (self.track_no, self.album.num_tracks)),
+            ('Date', self.date),
+            ('Pos', position),
+            ('Id', self.id),
+        ]
+
+    def mpd_format_artists(self):
+        return u', '.join([a.name for a in self.artists])
+
+
+class Playlist(object):
+    def __init__(self, uri=None, name=None, tracks=None):
+        self._uri = uri
+        self._name = name
+        self._tracks = tracks or []
+
+    @property
+    def uri(self):
+        return self._uri
+
+    @property
+    def name(self):
+        return self._name
+
+    @property
+    def tracks(self):
+        return copy(self._tracks)
+
+    @property
+    def length(self):
+        return len(self._tracks)
+
+    def mpd_format(self, start=0, end=None):
+        if end is None:
+            end = self.length
+        tracks = []
+        for track, position in zip(self.tracks, range(start, end)):
+            tracks.append(track.mpd_format(position))
+        return tracks