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plugins/artsearch/musicbrainz.py

 

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# -*- Mode: python; coding: utf-8; tab-width: 8; indent-tabs-mode: t; -*-

 

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#

 

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# Copyright (C) 2009 Jonathan Matthew  <jonathan@d14n.org>

 

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#

 

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# This program is free software; you can redistribute it and/or modify

 

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# it under the terms of the GNU General Public License as published by

 

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# the Free Software Foundation; either version 2, or (at your option)

 

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# any later version.

 

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#

 

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# The Rhythmbox authors hereby grant permission for non-GPL compatible

 

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# GStreamer plugins to be used and distributed together with GStreamer

 

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# and Rhythmbox. This permission is above and beyond the permissions granted

 

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# by the GPL license by which Rhythmbox is covered. If you modify this code

 

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# you may extend this exception to your version of the code, but you are not

 

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# obligated to do so. If you do not wish to do so, delete this exception

 

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# statement from your version.

 

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#

 

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# This program is distributed in the hope that it will be useful,

 

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

 

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 

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# GNU General Public License for more details.

 

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#

 

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# You should have received a copy of the GNU General Public License

 

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# along with this program; if not, write to the Free Software

 

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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA.

 

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import xml.dom.minidom as dom

 

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import rb

 

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from gi.repository import RB

 

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# musicbrainz URLs

 

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MUSICBRAINZ_RELEASE_URL = "http://musicbrainz.org/ws/2/release/%s?inc=artists"

 

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MUSICBRAINZ_RELEASE_PREFIX = "http://musicbrainz.org/release/"

 

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MUSICBRAINZ_RELEASE_SUFFIX = ".html"

 

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# musicbrainz IDs

 

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MUSICBRAINZ_VARIOUS_ARTISTS = "89ad4ac3-39f7-470e-963a-56509c546377"

 

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# Amazon URL bits

 

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AMAZON_IMAGE_URL = "http://images.amazon.com/images/P/%s.01.LZZZZZZZ.jpg"

 

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class MusicBrainzSearch(object):

 

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        def get_release_cb (self, data, args):

 

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                (key, store, callback, cbargs) = args

 

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                if data is None:

 

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                        print "musicbrainz release request returned nothing"

 

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                        callback(*cbargs)

 

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                        return

 

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                try:

 

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                        parsed = dom.parseString(data)

 

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                        storekey = RB.ExtDBKey.create_storage('album', key.get_field('album'))

 

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                        # check that there's an artist that isn't 'various artists'

 

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                        artist_tags = parsed.getElementsByTagName('artist')

 

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                        if len(artist_tags) > 0:

 

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                                artist_id = artist_tags[0].attributes['id'].firstChild.data

 

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                                if artist_id != MUSICBRAINZ_VARIOUS_ARTISTS:

 

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                                        # add the artist name (as album-artist) to the storage key

 

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                                        nametags = artist_tags[0].getElementsByTagName('name')

 

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                                        if len(nametags) > 0:

 

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                                                artistname = nametags[0].firstChild.data

 

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                                                print "got musicbrainz artist name %s" % artistname

 

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                                                storekey.add_field('artist', artistname)

 

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                        # look for an ASIN tag

 

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                        asin_tags = parsed.getElementsByTagName('asin')

 

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                        if len(asin_tags) > 0:

 

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                                asin = asin_tags[0].firstChild.data

 

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                                print "got ASIN %s" % asin

 

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                                image_url = AMAZON_IMAGE_URL % asin

 

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                                store.store_uri(storekey, RB.ExtDBSourceType.SEARCH, image_url)

 

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                        else:

 

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                                print "no ASIN for this release"

 

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                        callback(*cbargs)

 

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                except Exception, e:

 

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                        print "exception parsing musicbrainz response: %s" % e

 

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                        callback(*cbargs)

 

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        def search(self, key, last_time, store, callback, *args):

 

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                key = key.copy()        # ugh

 

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                album_id = key.get_info("musicbrainz-albumid")

 

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                if album_id is None:

 

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                        print "no musicbrainz release ID for this track"

 

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                        callback(*args)

 

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                        return

 

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                if album_id.startswith(MUSICBRAINZ_RELEASE_PREFIX):

 

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                        album_id = album_id[len(MUSICBRAINZ_RELEASE_PREFIX):]

 

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                if album_id.endswith(MUSICBRAINZ_RELEASE_SUFFIX):

 

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                        album_id = album_id[:-len(MUSICBRAINZ_RELEASE_SUFFIX)]

 

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                print "stripped release ID: %s" % album_id

 

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                url = MUSICBRAINZ_RELEASE_URL % (album_id)

 

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                loader = rb.Loader()

 

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                loader.get_url(url, self.get_release_cb, (key, store, callback, args))

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