4 * Factory for MessagePoster objects. This provides a pluggable to way to script the action
5 * of adding a message to someone's talk page.
7 * @class mw.messagePoster.factory
10 function MessagePosterFactory() {
11 this.contentModelToClass = {};
14 OO.initClass( MessagePosterFactory );
16 // Note: This registration scheme is currently not compatible with LQT, since that doesn't
17 // have its own content model, just islqttalkpage. LQT pages will be passed to the wikitext
20 * Register a MessagePoster subclass for a given content model.
22 * @param {string} contentModel Content model of pages this MessagePoster can post to
23 * @param {Function} constructor Constructor of a MessagePoster subclass
25 MessagePosterFactory.prototype.register = function ( contentModel, constructor ) {
26 if ( this.contentModelToClass[ contentModel ] !== undefined ) {
27 throw new Error( 'Content model "' + contentModel + '" is already registered' );
30 this.contentModelToClass[ contentModel ] = constructor;
34 * Unregister a given content model.
35 * This is exposed for testing and should not normally be used.
37 * @param {string} contentModel Content model to unregister
39 MessagePosterFactory.prototype.unregister = function ( contentModel ) {
40 delete this.contentModelToClass[ contentModel ];
44 * Create a MessagePoster for given a title.
46 * A promise for this is returned. It works by determining the content model, then loading
47 * the corresponding module (which registers the MessagePoster class), and finally constructing
48 * an object for the given title.
50 * This does not require the message and should be called as soon as possible, so that the
51 * API and ResourceLoader requests run in the background.
53 * @param {mw.Title} title Title that will be posted to
54 * @param {string} [apiUrl] api.php URL if the title is on another wiki
55 * @return {jQuery.Promise} Promise resolving to a mw.messagePoster.MessagePoster.
56 * For failure, rejected with up to three arguments:
58 * - errorCode Error code string
59 * - error Error explanation
60 * - details Further error details
62 MessagePosterFactory.prototype.create = function ( title, apiUrl ) {
64 api = apiUrl ? new mw.ForeignApi( apiUrl ) : new mw.Api();
70 titles: title.getPrefixedDb()
71 } ).then( function ( data ) {
72 var pageId, page, contentModel, moduleName;
73 if ( !data.query.pageids[ 0 ] ) {
74 return $.Deferred().reject( 'unexpected-response', 'Unexpected API response' );
76 pageId = data.query.pageids[ 0 ];
77 page = data.query.pages[ pageId ];
79 contentModel = page.contentmodel;
80 moduleName = 'mediawiki.messagePoster.' + contentModel;
81 return mw.loader.using( moduleName ).then( function () {
82 return factory.createForContentModel(
88 return $.Deferred().reject( 'failed-to-load-module', 'Failed to load "' + moduleName + '"' );
90 }, function ( error, details ) {
91 return $.Deferred().reject( 'content-model-query-failed', error, details );
96 * Creates a MessagePoster instance, given a title and content model
99 * @param {string} contentModel Content model of title
100 * @param {mw.Title} title Title being posted to
101 * @param {mw.Api} api mw.Api instance that the instance should use
102 * @return {mw.messagePoster.MessagePoster}
105 MessagePosterFactory.prototype.createForContentModel = function ( contentModel, title, api ) {
106 return new this.contentModelToClass[ contentModel ]( title, api );
110 factory: new MessagePosterFactory()
112 }( mediaWiki, jQuery ) );