Merge branch 'feature/mp3-metadata' into 'develop'

Fixed #21: can now import MP3 files via command line, also improved musicbrainz…

Closes #21

See merge request !8

api/funkwhale_api/music/metadata.py

 import mutagen
+import arrow
 
 NODEFAULT = object()
 
-class Metadata(object):
-    ALIASES = {
-        'release': 'musicbrainz_albumid',
-        'artist': 'musicbrainz_artistid',
-        'recording': 'musicbrainz_trackid',
+
+class TagNotFound(KeyError):
+    pass
+
+
+def get_id3_tag(f, k):
+    # First we try to grab the standard key
+    try:
+        return f.tags[k].text[0]
+    except KeyError:
+        pass
+    # then we fallback on parsing non standard tags
+    all_tags = f.tags.getall('TXXX')
+    try:
+        matches = [
+            t
+            for t in all_tags
+            if t.desc.lower() == k.lower()
+        ]
+        return matches[0].text[0]
+    except (KeyError, IndexError):
+        raise TagNotFound(k)
+
+
+def get_mp3_recording_id(f, k):
+    try:
+        return [
+            t
+            for t in f.tags.getall('UFID')
+            if 'musicbrainz.org' in t.owner
+        ][0].data.decode('utf-8')
+    except IndexError:
+        raise TagNotFound(k)
+
+CONF = {
+    'OggVorbis': {
+        'getter': lambda f, k: f[k][0],
+        'fields': {
+            'track_number': {
+                'field': 'TRACKNUMBER',
+                'to_application': int
+            },
+            'title': {
+                'field': 'title'
+            },
+            'artist': {
+                'field': 'artist'
+            },
+            'album': {
+                'field': 'album'
+            },
+            'date': {
+                'field': 'date',
+                'to_application': lambda v: arrow.get(v).date()
+            },
+            'musicbrainz_albumid': {
+                'field': 'musicbrainz_albumid'
+            },
+            'musicbrainz_artistid': {
+                'field': 'musicbrainz_artistid'
+            },
+            'musicbrainz_recordingid': {
+                'field': 'musicbrainz_trackid'
+            },
+        }
+    },
+    'MP3': {
+        'getter': get_id3_tag,
+        'fields': {
+            'track_number': {
+                'field': 'TPOS',
+                'to_application': lambda v: int(v.split('/')[0])
+            },
+            'title': {
+                'field': 'TIT2'
+            },
+            'artist': {
+                'field': 'TPE1'
+            },
+            'album': {
+                'field': 'TALB'
+            },
+            'date': {
+                'field': 'TDRC',
+                'to_application': lambda v: arrow.get(str(v)).date()
+            },
+            'musicbrainz_albumid': {
+                'field': 'MusicBrainz Album Id'
+            },
+            'musicbrainz_artistid': {
+                'field': 'MusicBrainz Artist Id'
+            },
+            'musicbrainz_recordingid': {
+                'field': 'UFID',
+                'getter': get_mp3_recording_id,
+            },
+        }
     }
+}
+
+
+class Metadata(object):
 
     def __init__(self, path):
         self._file = mutagen.File(path)
+        self._conf = CONF[self.get_file_type(self._file)]
 
-    def get(self, key, default=NODEFAULT, single=True):
+    def get_file_type(self, f):
+        return f.__class__.__name__
+
+    def get(self, key, default=NODEFAULT):
+        field_conf = self._conf['fields'][key]
+        real_key = field_conf['field']
         try:
-            v = self._file[key]
+            getter = field_conf.get('getter', self._conf['getter'])
+            v = getter(self._file, real_key)
         except KeyError:
             if default == NODEFAULT:
-                raise
+                raise TagNotFound(real_key)
             return default
 
-        # Some tags are returned as lists of string
-        if single:
-            return v[0]
+        converter = field_conf.get('to_application')
+        if converter:
+            v = converter(v)
         return v
-
-    def __getattr__(self, key):
-        try:
-            alias = self.ALIASES[key]
-        except KeyError:
-            raise ValueError('Invalid alias {}'.format(key))
-
-        return self.get(alias, single=True)

api/funkwhale_api/music/tests/test_metadata.py

 import unittest
 import os
+import datetime
 from test_plus.test import TestCase
 from funkwhale_api.music import metadata
 
@@ -8,20 +9,72 @@ DATA_DIR = os.path.dirname(os.path.abspath(__file__))
 
 class TestMetadata(TestCase):
 
-    def test_can_get_metadata_from_file(self, *mocks):
+    def test_can_get_metadata_from_ogg_file(self, *mocks):
         path = os.path.join(DATA_DIR, 'test.ogg')
         data = metadata.Metadata(path)
 
+        self.assertEqual(
+            data.get('title'),
+            'Peer Gynt Suite no. 1, op. 46: I. Morning'
+        )
+        self.assertEqual(
+            data.get('artist'),
+            'Edvard Grieg'
+        )
+        self.assertEqual(
+            data.get('album'),
+            'Peer Gynt Suite no. 1, op. 46'
+        )
+        self.assertEqual(
+            data.get('date'),
+            datetime.date(2012, 8, 15),
+        )
+        self.assertEqual(
+            data.get('track_number'),
+            1
+        )
+
         self.assertEqual(
             data.get('musicbrainz_albumid'),
             'a766da8b-8336-47aa-a3ee-371cc41ccc75')
         self.assertEqual(
-            data.get('musicbrainz_trackid'),
+            data.get('musicbrainz_recordingid'),
             'bd21ac48-46d8-4e78-925f-d9cc2a294656')
         self.assertEqual(
             data.get('musicbrainz_artistid'),
             '013c8e5b-d72a-4cd3-8dee-6c64d6125823')
 
-        self.assertEqual(data.release, data.get('musicbrainz_albumid'))
-        self.assertEqual(data.artist, data.get('musicbrainz_artistid'))
-        self.assertEqual(data.recording, data.get('musicbrainz_trackid'))
+    def test_can_get_metadata_from_id3_mp3_file(self, *mocks):
+        path = os.path.join(DATA_DIR, 'test.mp3')
+        data = metadata.Metadata(path)
+
+        self.assertEqual(
+            data.get('title'),
+            'Bend'
+        )
+        self.assertEqual(
+            data.get('artist'),
+            'Binärpilot'
+        )
+        self.assertEqual(
+            data.get('album'),
+            'You Can\'t Stop Da Funk'
+        )
+        self.assertEqual(
+            data.get('date'),
+            datetime.date(2006, 2, 7),
+        )
+        self.assertEqual(
+            data.get('track_number'),
+            1
+        )
+
+        self.assertEqual(
+            data.get('musicbrainz_albumid'),
+            'ce40cdb1-a562-4fd8-a269-9269f98d4124')
+        self.assertEqual(
+            data.get('musicbrainz_recordingid'),
+            'f269d497-1cc0-4ae4-a0c4-157ec7d73fcb')
+        self.assertEqual(
+            data.get('musicbrainz_artistid'),
+            '9c6bddde-6228-4d9f-ad0d-03f6fcb19e13')

api/funkwhale_api/providers/audiofile/importer.py

@@ -9,41 +9,34 @@ from funkwhale_api.music import models, metadata
 @celery.app.task(name='audiofile.from_path')
 def from_path(path):
     data = metadata.Metadata(path)
-
     artist = models.Artist.objects.get_or_create(
         name__iexact=data.get('artist'),
-        defaults={'name': data.get('artist')},
-    )[0]
+        defaults={
+            'name': data.get('artist'),
+            'mbid': data.get('musicbrainz_artistid', None),
 
-    release_date = None
-    try:
-        year, month, day = data.get('date', None).split('-')
-        release_date = datetime.date(
-            int(year), int(month), int(day)
-        )
-    except (ValueError, TypeError):
-        pass
+        },
+    )[0]
 
+    release_date = data.get('date', default=None)
     album = models.Album.objects.get_or_create(
         title__iexact=data.get('album'),
         artist=artist,
         defaults={
             'title': data.get('album'),
             'release_date': release_date,
+            'mbid': data.get('musicbrainz_albumid', None),
         },
     )[0]
 
-    position = None
-    try:
-        position = int(data.get('tracknumber', None))
-    except ValueError:
-        pass
+    position = data.get('track_number', default=None)
     track = models.Track.objects.get_or_create(
         title__iexact=data.get('title'),
         album=album,
         defaults={
             'title': data.get('title'),
             'position': position,
+            'mbid': data.get('musicbrainz_recordingid', None),
         },
     )[0]
 

api/funkwhale_api/providers/audiofile/tests/test_disk_import.py

@@ -14,21 +14,37 @@ class TestAudioFile(TestCase):
             'artist': ['Test artist'],
             'album': ['Test album'],
             'title': ['Test track'],
-            'tracknumber': ['4'],
-            'date': ['2012-08-15']
+            'TRACKNUMBER': ['4'],
+            'date': ['2012-08-15'],
+            'musicbrainz_albumid': ['a766da8b-8336-47aa-a3ee-371cc41ccc75'],
+            'musicbrainz_trackid': ['bd21ac48-46d8-4e78-925f-d9cc2a294656'],
+            'musicbrainz_artistid': ['013c8e5b-d72a-4cd3-8dee-6c64d6125823'],
         }
 
-        with unittest.mock.patch('mutagen.File', return_value=metadata):
+        m1 = unittest.mock.patch('mutagen.File', return_value=metadata)
+        m2 = unittest.mock.patch(
+            'funkwhale_api.music.metadata.Metadata.get_file_type',
+            return_value='OggVorbis',
+        )
+        with m1, m2:
             track_file = importer.from_path(
                 os.path.join(DATA_DIR, 'dummy_file.ogg'))
 
         self.assertEqual(
             track_file.track.title, metadata['title'][0])
+        self.assertEqual(
+            track_file.track.mbid, metadata['musicbrainz_trackid'][0])
         self.assertEqual(
             track_file.track.position, 4)
         self.assertEqual(
             track_file.track.album.title, metadata['album'][0])
+        self.assertEqual(
+            track_file.track.album.mbid,
+            metadata['musicbrainz_albumid'][0])
         self.assertEqual(
             track_file.track.album.release_date, datetime.date(2012, 8, 15))
         self.assertEqual(
             track_file.track.artist.name, metadata['artist'][0])
+        self.assertEqual(
+            track_file.track.artist.mbid,
+            metadata['musicbrainz_artistid'][0])

docs/importing-music.rst

@@ -14,14 +14,18 @@ least an ``artist``, ``album`` and ``title`` tag, you can import those tracks as
 
     docker-compose run --rm api python manage.py import_files "/music/**/*.ogg" --recursive --noinput
 
+For the best results, we recommand tagging your music collection through
+`Picard <http://picard.musicbrainz.org/>`_ in order to have the best quality metadata.
+
 .. note::
 
     This command is idempotent, meaning you can run it multiple times on the same
     files and already imported files will simply be skipped.
 
-.. warning::
+.. note::
+
+    At the moment, only OGG/Vorbis and MP3 files with ID3 tags are supported
 
-    At the moment, only ogg files are supported. MP3 support will be implemented soon.
 
 Getting demo tracks
 ^^^^^^^^^^^^^^^^^^^