User:JonnyJD/musicbrainz.js

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// Use with:
// importScript( 'User:JonnyJD/musicbrainz.js' );
// in https://www.wikidata.org/wiki/Special:MyPage/common.js
//
// The script runs as soon as the item is loaded
// and displays a red warning text in the upper right corner
// when the item includes an MBID, but the item is not linked at MusicBrainz.
 
 
var musicbrainz = {
 
	running: false,
	
	properties: {
		'P434': 'artist',
		'P435': 'work',
		'P436': 'release-group',
		'P966': 'label',
		'P982': 'area',
		'P1004': 'place'
	},
 
	// not used currently
	init: function () {
		var self = this;
		var portletLink = mw.util.addPortletLink('p-tb', '#', 'MusicBrainz','t-musicbrainz');
		$(portletLink).click(function () {
			self.run();
			return false ;
		});
	},
 
	run: function () {
		var self = this;
		if (self.running) return;
		self.running = true;
		var q = mw.config.get('wgPageName');
 
		$.getJSON ('//www.wikidata.org/w/api.php?callback=?', {
			action: 'wbgetentities',
			ids: q,
			format: 'json',
			props: 'claims'
		}, function(data) {
			if (data.entities !== undefined && data.entities[q].claims !== undefined) {
				$.each(data.entities[q].claims, function(k, v) {
					if (self.properties[k] !== undefined) {
						$.each(v, function(k2, v2) {
							if (v2.mainsnak.datavalue === undefined) return; // No value
							var mbid = v2.mainsnak.datavalue.value;
							self.checkMusicBrainz(self.properties[k], mbid, q);
						});
					}
				});
			}
		});
 
	},
 
	checkMusicBrainz: function(entity, mbid, q) {
 
		$.getJSON('//www.musicbrainz.org/ws/2/' + entity + '/' + mbid + '/', {
			fmt: 'json',
			inc: 'url-rels'
		}, function(data) {
			var found_q = false;
 			$.each(data.relations, function(k, v) {
 				if (v.type == "wikidata") {
 					if (v.url.resource.indexOf(q) != -1) {
 						found_q = true;
 						return false; // this breaks the $.each() loop
 					}
 				}
 			});
 			if (!found_q) {
 				var link = '<a href="https://musicbrainz.org/' + entity + '/' + mbid + '">MusicBrainz</a>';
 				mw.util.jsMessage('<span style="color:red;">Not linked on ' + link + '!</span>');
 			}
		});
 
	}

};
 
//addOnloadHook(function() { musicbrainz.init(); });
$(function() { musicbrainz.run(); });