add work, work-disambig and work_id tags

beets/autotag/__init__.py

@@ -54,6 +54,12 @@ def apply_item_metadata(item, track_info):
         item.composer_sort = track_info.composer_sort
     if track_info.arranger is not None:
         item.arranger = track_info.arranger
+    if track_info.work is not None:
+        item.work = track_info.work
+    if track_info.mb_workid is not None:
+        item.mb_workid = track_info.mb_workid
+    if track_info.work_disambig is not None:
+        item.work_disambig = track_info.work_disambig
 
     # At the moment, the other metadata is left intact (including album
     # and track number). Perhaps these should be emptied?
@@ -167,6 +173,9 @@ def apply_metadata(album_info, mapping):
                 'composer',
                 'composer_sort',
                 'arranger',
+                'work',
+                'mb_workid',
+                'work_disambig',
             )
         }
 

beets/autotag/hooks.py

@@ -159,6 +159,9 @@ class TrackInfo(object):
     - ``composer_sort``: individual track composer sort name
     - ``arranger`: individual track arranger name
     - ``track_alt``: alternative track number (tape, vinyl, etc.)
+    - ``work`: individual track work title
+    - ``mb_workid`: individual track work id
+    - ``work_disambig`: individual track work diambiguation
 
     Only ``title`` and ``track_id`` are required. The rest of the fields
     may be None. The indices ``index``, ``medium``, and ``medium_index``
@@ -169,7 +172,8 @@ def __init__(self, title, track_id, release_track_id=None, artist=None,
                  medium_index=None, medium_total=None, artist_sort=None,
                  disctitle=None, artist_credit=None, data_source=None,
                  data_url=None, media=None, lyricist=None, composer=None,
-                 composer_sort=None, arranger=None, track_alt=None):
+                 composer_sort=None, arranger=None, track_alt=None,
+                 work=None, mb_workid=None, work_disambig=None):
         self.title = title
         self.track_id = track_id
         self.release_track_id = release_track_id
@@ -191,6 +195,9 @@ def __init__(self, title, track_id, release_track_id=None, artist=None,
         self.composer_sort = composer_sort
         self.arranger = arranger
         self.track_alt = track_alt
+        self.work = work
+        self.mb_workid = mb_workid
+        self.work_disambig = work_disambig
 
     # As above, work around a bug in python-musicbrainz-ngs.
     def decode(self, codec='utf-8'):

beets/autotag/mb.py

@@ -213,6 +213,11 @@ def track_info(recording, index=None, medium=None, medium_index=None,
     for work_relation in recording.get('work-relation-list', ()):
         if work_relation['type'] != 'performance':
             continue
+        info.work = work_relation['work']['title']
+        info.mb_workid = work_relation['work']['id']
+        if 'disambiguation' in work_relation['work']:
+            info.work_disambig = work_relation['work']['disambiguation']
+
         for artist_relation in work_relation['work'].get(
                 'artist-relation-list', ()):
             if 'type' in artist_relation:

beets/library.py

@@ -451,6 +451,9 @@ class Item(LibModel):
         'lyricist':             types.STRING,
         'composer':             types.STRING,
         'composer_sort':        types.STRING,
+        'work':                 types.STRING,
+        'mb_workid':            types.STRING,
+        'work_disambig':        types.STRING,
         'arranger':             types.STRING,
         'grouping':             types.STRING,
         'year':                 types.PaddedInt(4),

test/_common.py

@@ -70,6 +70,9 @@ def item(lib=None):
         composer=u'the composer',
         arranger=u'the arranger',
         grouping=u'the grouping',
+        work=u'the work title',
+        mb_workid=u'the work musicbrainz id',
+        work_disambig=u'the work disambiguation',
         year=1,
         month=2,
         day=3,