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# This file is part of beets.
# Copyright 2016, Jakob Schnitzer.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Synchronise library metadata with metadata source backends."""
from collections import defaultdict
from beets import autotag, library, metadata_plugins, ui, util
from beets.plugins import BeetsPlugin, apply_item_changes
class MBSyncPlugin(BeetsPlugin):
def __init__(self):
super().__init__()
def commands(self):
cmd = ui.Subcommand("mbsync", help="update metadata from musicbrainz")
cmd.parser.add_option(
"-p",
"--pretend",
action="store_true",
help="show all changes but do nothing",
)
cmd.parser.add_option(
"-m",
"--move",
action="store_true",
dest="move",
help="move files in the library directory",
)
cmd.parser.add_option(
"-M",
"--nomove",
action="store_false",
dest="move",
help="don't move files in library",
)
cmd.parser.add_option(
"-W",
"--nowrite",
action="store_false",
default=None,
dest="write",
help="don't write updated metadata to files",
)
cmd.parser.add_format_option()
cmd.func = self.func
return [cmd]
def func(self, lib, opts, args):
"""Command handler for the mbsync function."""
move = ui.should_move(opts.move)
pretend = opts.pretend
write = ui.should_write(opts.write)
self.singletons(lib, args, move, pretend, write)
self.albums(lib, args, move, pretend, write)
def singletons(self, lib, query, move, pretend, write):
"""Retrieve and apply info from the autotagger for items matched by
query.
"""
for item in lib.items(query + ["singleton:true"]):
if not item.mb_trackid:
self._log.info(
"Skipping singleton with no mb_trackid: {}", item
)
continue
if not (
track_info := metadata_plugins.track_for_id(item.mb_trackid)
):
self._log.info(
"Recording ID not found: {0.mb_trackid} for track {0}", item
)
continue
# Apply.
with lib.transaction():
autotag.apply_item_metadata(item, track_info)
apply_item_changes(lib, item, move, pretend, write)
def albums(self, lib, query, move, pretend, write):
"""Retrieve and apply info from the autotagger for albums matched by
query and their items.
"""
# Process matching albums.
for album in lib.albums(query):
if not album.mb_albumid:
self._log.info("Skipping album with no mb_albumid: {}", album)
continue
if not (
album_info := metadata_plugins.album_for_id(album.mb_albumid)
):
self._log.info(
"Release ID {0.mb_albumid} not found for album {0}", album
)
continue
# Map release track and recording MBIDs to their information.
# Recordings can appear multiple times on a release, so each MBID
# maps to a list of TrackInfo objects.
releasetrack_index = {}
track_index = defaultdict(list)
for track_info in album_info.tracks:
releasetrack_index[track_info.release_track_id] = track_info
track_index[track_info.track_id].append(track_info)
# Construct a track mapping according to MBIDs (release track MBIDs
# first, if available, and recording MBIDs otherwise). This should
# work for albums that have missing or extra tracks.
mapping = {}
items = list(album.items())
for item in items:
if (
item.mb_releasetrackid
and item.mb_releasetrackid in releasetrack_index
):
mapping[item] = releasetrack_index[item.mb_releasetrackid]
else:
candidates = track_index[item.mb_trackid]
if len(candidates) == 1:
mapping[item] = candidates[0]
else:
# If there are multiple copies of a recording, they are
# disambiguated using their disc and track number.
for c in candidates:
if (
c.medium_index == item.track
and c.medium == item.disc
):
mapping[item] = c
break
# Apply.
self._log.debug("applying changes to {}", album)
with lib.transaction():
autotag.apply_metadata(album_info, mapping)
changed = False
# Find any changed item to apply changes to album.
any_changed_item = items[0]
for item in items:
item_changed = ui.show_model_changes(item)
changed |= item_changed
if item_changed:
any_changed_item = item
apply_item_changes(lib, item, move, pretend, write)
if not changed:
# No change to any item.
continue
if not pretend:
# Update album structure to reflect an item in it.
for key in library.Album.item_keys:
album[key] = any_changed_item[key]
album.store()
# Move album art (and any inconsistent items).
if move and lib.directory in util.ancestry(items[0].path):
self._log.debug("moving album {}", album)
album.move()
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