local: Add search-by-date support

docs/changes.rst

@@ -28,6 +28,8 @@ v0.11.0 (in development)
 
 - Load track dates from tag cache.
 
+- Add support for searching by track date.
+
 **MPD frontend**
 
 - Add :attr:`mopidy.settings.MPD_SERVER_CONNECTION_TIMEOUT` setting which

mopidy/backends/local/library.py

@@ -51,6 +51,7 @@ class LocalLibraryProvider(base.BaseLibraryProvider):
                 album_filter = lambda t: q == getattr(t, 'album', Album()).name
                 artist_filter = lambda t: filter(
                     lambda a: q == a.name, t.artists)
+                date_filter = lambda t: q == t.date
                 any_filter = lambda t: (
                     track_filter(t) or album_filter(t) or
                     artist_filter(t) or uri_filter(t))
@@ -63,6 +64,8 @@ class LocalLibraryProvider(base.BaseLibraryProvider):
                     result_tracks = filter(album_filter, result_tracks)
                 elif field == 'artist':
                     result_tracks = filter(artist_filter, result_tracks)
+                elif field == 'date':
+                    result_tracks = filter(date_filter, result_tracks)
                 elif field == 'any':
                     result_tracks = filter(any_filter, result_tracks)
                 else:
@@ -86,6 +89,7 @@ class LocalLibraryProvider(base.BaseLibraryProvider):
                     t, 'album', Album()).name.lower()
                 artist_filter = lambda t: filter(
                     lambda a: q in a.name.lower(), t.artists)
+                date_filter = lambda t: t.date and t.date.startswith(q)
                 any_filter = lambda t: track_filter(t) or album_filter(t) or \
                     artist_filter(t) or uri_filter(t)
 
@@ -97,6 +101,8 @@ class LocalLibraryProvider(base.BaseLibraryProvider):
                     result_tracks = filter(album_filter, result_tracks)
                 elif field == 'artist':
                     result_tracks = filter(artist_filter, result_tracks)
+                elif field == 'date':
+                    result_tracks = filter(date_filter, result_tracks)
                 elif field == 'any':
                     result_tracks = filter(any_filter, result_tracks)
                 else:

tests/backends/base/library.py

@@ -16,11 +16,12 @@ class LibraryControllerTest(object):
         Album()]
     tracks = [
         Track(
-            name='track1', length=4000, artists=artists[:1],
+            uri='file://' + path_to_data_dir('uri1'), name='track1',
-            album=albums[0], uri='file://' + path_to_data_dir('uri1')),
+            artists=artists[:1], album=albums[0], date='2001-02-03',
+            length=4000),
         Track(
-            name='track2', length=4000, artists=artists[1:2],
+            uri='file://' + path_to_data_dir('uri2'), name='track2',
-            album=albums[1], uri='file://' + path_to_data_dir('uri2')),
+            artists=artists[1:2], album=albums[1], date='2002', length=4000),
         Track()]
 
     def setUp(self):
@@ -90,6 +91,16 @@ class LibraryControllerTest(object):
         result = self.library.find_exact(album=['album2'])
         self.assertEqual(result, self.tracks[1:2])
 
+    def test_find_exact_date(self):
+        result = self.library.find_exact(date=['2001'])
+        self.assertEqual(result, [])
+
+        result = self.library.find_exact(date=['2001-02-03'])
+        self.assertEqual(result, self.tracks[:1])
+
+        result = self.library.find_exact(date=['2002'])
+        self.assertEqual(result, self.tracks[1:2])
+
     def test_find_exact_wrong_type(self):
         test = lambda: self.library.find_exact(wrong=['test'])
         self.assertRaises(LookupError, test)
@@ -148,6 +159,19 @@ class LibraryControllerTest(object):
         result = self.library.search(album=['Bum2'])
         self.assertEqual(result, self.tracks[1:2])
 
+    def test_search_date(self):
+        result = self.library.search(date=['2001'])
+        self.assertEqual(result, self.tracks[:1])
+
+        result = self.library.search(date=['2001-02-03'])
+        self.assertEqual(result, self.tracks[:1])
+
+        result = self.library.search(date=['2001-02-04'])
+        self.assertEqual(result, [])
+
+        result = self.library.search(date=['2002'])
+        self.assertEqual(result, self.tracks[1:2])
+
     def test_search_any(self):
         result = self.library.search(any=['Tist1'])
         self.assertEqual(result, self.tracks[:1])

tests/data/library_tag_cache

@@ -8,12 +8,14 @@ file: /uri1
 Artist: artist1
 Title: track1
 Album: album1
+Date: 2001-02-03
 Time: 4
 key: uri2
 file: /uri2
 Artist: artist2
 Title: track2
 Album: album2
+Date: 2002
 Time: 4
 key: uri3
 file: /uri3