mpd: Support search by date (#272)

docs/changes.rst

@@ -53,6 +53,8 @@ v0.11.0 (in development)
 
   - Add empty stubs for channel commands for client to client communication.
 
+- Add support for search by date.
+
 **Internal changes**
 
 *Models:*

mopidy/frontends/mpd/translator.py

@@ -187,12 +187,15 @@ def query_from_mpd_search_format(mpd_query):
     :param mpd_query: the MPD search query
     :type mpd_query: string
     """
+    # XXX The regexps below should be refactored to reuse common patterns here
+    # and in mopidy.frontends.mpd.protocol.music_db.
     query_pattern = (
-        r'"?(?:[Aa]lbum|[Aa]rtist|[Ff]ile[name]*|[Tt]itle|[Aa]ny)"? "[^"]+"')
+        r'"?(?:[Aa]lbum|[Aa]rtist|[Dd]ate|[Ff]ile|[Ff]ilename|'
+        r'[Tt]itle|[Aa]ny)"? "[^"]+"')
     query_parts = re.findall(query_pattern, mpd_query)
     query_part_pattern = (
-        r'"?(?P<field>([Aa]lbum|[Aa]rtist|[Ff]ile[name]*|[Tt]itle|[Aa]ny))"? '
-        r'"(?P<what>[^"]+)"')
+        r'"?(?P<field>([Aa]lbum|[Aa]rtist|[Dd]ate|[Ff]ile|[Ff]ilename|'
+        r'[Tt]itle|[Aa]ny))"? "(?P<what>[^"]+)"')
     query = {}
     for query_part in query_parts:
         m = re.match(query_part_pattern, query_part)

tests/frontends/mpd/translator_test.py

@@ -121,6 +121,20 @@ class PlaylistMpdFormatTest(unittest.TestCase):
         self.assertEqual(dict(result[0])['Track'], 2)
 
 
+class QueryFromMpdSearchFormatTest(unittest.TestCase):
+    def test_dates_are_extracted(self):
+        result = translator.query_from_mpd_search_format(
+            'Date "1974-01-02" Date "1975"')
+        self.assertEqual(result['date'][0], '1974-01-02')
+        self.assertEqual(result['date'][1], '1975')
+
+    # TODO Test more mappings
+
+
+class QueryFromMpdListFormatTest(unittest.TestCase):
+    pass  # TODO
+
+
 class TracksToTagCacheFormatTest(unittest.TestCase):
     def setUp(self):
         settings.LOCAL_MUSIC_PATH = '/dir/subdir'