mpd: Include artists and albums in search results

docs/changes.rst

@@ -58,6 +58,11 @@ v0.11.0 (in development)
 
 - Add support for search by date.
 
+- Include fake tracks representing albums and artists in the search results.
+  When these are added to the tracklist, they expand to either all tracks in
+  the album or all tracks by the artist. This makes it easy to play full albums
+  in proper order, which is a feature that have been frequently requested.
+
 **Internal changes**
 
 *Models:*

mopidy/frontends/mpd/protocol/music_db.py

@@ -1,7 +1,9 @@
 from __future__ import unicode_literals
 
+import functools
 import itertools
 
+from mopidy.models import Track
 from mopidy.frontends.mpd import translator
 from mopidy.frontends.mpd.exceptions import MpdNotImplemented
 from mopidy.frontends.mpd.protocol import handle_request, stored_playlists
@@ -12,8 +14,28 @@ QUERY_RE = (
     r'[Tt]itle|[Aa]ny)"? "[^"]*"\s?)+)$')
 
 
-def _get_tracks(search_results):
-    return list(itertools.chain(*[r.tracks for r in search_results]))
+def _get_field(field, search_results):
+    return list(itertools.chain(*[getattr(r, field) for r in search_results]))
+
+
+_get_albums = functools.partial(_get_field, 'albums')
+_get_artists = functools.partial(_get_field, 'artists')
+_get_tracks = functools.partial(_get_field, 'tracks')
+
+
+def _album_as_track(album):
+    return Track(
+        uri=album.uri,
+        name='Album: ' + album.name,
+        album=album,
+        artists=album.artists)
+
+
+def _artist_as_track(artist):
+    return Track(
+        uri=artist.uri,
+        name='Artist: ' + artist.name,
+        artists=[artist])
 
 
 @handle_request(r'^count "(?P<tag>[^"]+)" "(?P<needle>[^"]*)"$')
@@ -62,7 +84,10 @@ def find(context, mpd_query):
     except ValueError:
         return
     results = context.core.library.find_exact(**query).get()
-    return translator.tracks_to_mpd_format(_get_tracks(results))
+    albums = [_album_as_track(a) for a in _get_albums(results)]
+    artists = [_artist_as_track(a) for a in _get_artists(results)]
+    tracks = _get_tracks(results)
+    return translator.tracks_to_mpd_format(artists + albums + tracks)
 
 
 @handle_request(r'^findadd ' + QUERY_RE)
@@ -304,7 +329,10 @@ def search(context, mpd_query):
     except ValueError:
         return
     results = context.core.library.search(**query).get()
-    return translator.tracks_to_mpd_format(_get_tracks(results))
+    albums = [_album_as_track(a) for a in _get_albums(results)]
+    artists = [_artist_as_track(a) for a in _get_artists(results)]
+    tracks = _get_tracks(results)
+    return translator.tracks_to_mpd_format(artists + albums + tracks)
 
 
 @handle_request(r'^searchadd ' + QUERY_RE)

tests/frontends/mpd/protocol/music_db_test.py

@@ -115,6 +115,23 @@ class MusicDatabaseHandlerTest(protocol.BaseTestCase):
 
 
 class MusicDatabaseFindTest(protocol.BaseTestCase):
+    def test_find(self):
+        self.backend.library.dummy_find_exact_result = SearchResult(
+            albums=[Album(uri='dummy:album:a', name='A')],
+            artists=[Artist(uri='dummy:artist:b', name='B')],
+            tracks=[Track(uri='dummy:track:c', name='C')])
+
+        self.sendRequest('find "any" "foo"')
+
+        self.assertInResponse('file: dummy:album:a')
+        self.assertInResponse('Title: Album: A')
+        self.assertInResponse('file: dummy:artist:b')
+        self.assertInResponse('Title: Artist: B')
+        self.assertInResponse('file: dummy:track:c')
+        self.assertInResponse('Title: C')
+
+        self.assertInResponse('OK')
+
     def test_find_album(self):
         self.sendRequest('find "album" "what"')
         self.assertInResponse('OK')
@@ -409,6 +426,23 @@ class MusicDatabaseListTest(protocol.BaseTestCase):
 
 
 class MusicDatabaseSearchTest(protocol.BaseTestCase):
+    def test_search(self):
+        self.backend.library.dummy_search_result = SearchResult(
+            albums=[Album(uri='dummy:album:a', name='A')],
+            artists=[Artist(uri='dummy:artist:b', name='B')],
+            tracks=[Track(uri='dummy:track:c', name='C')])
+
+        self.sendRequest('search "any" "foo"')
+
+        self.assertInResponse('file: dummy:album:a')
+        self.assertInResponse('Title: Album: A')
+        self.assertInResponse('file: dummy:artist:b')
+        self.assertInResponse('Title: Artist: B')
+        self.assertInResponse('file: dummy:track:c')
+        self.assertInResponse('Title: C')
+
+        self.assertInResponse('OK')
+
     def test_search_album(self):
         self.sendRequest('search "album" "analbum"')
         self.assertInResponse('OK')