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( function ( mw, $ ) {
/**
* Factory for MessagePoster objects. This provides a pluggable to way to script the action
* of adding a message to someone's talk page.
*
* @class mw.messagePoster.factory
* @singleton
*/
function MessagePosterFactory() {
this.contentModelToClass = {};
}
OO.initClass( MessagePosterFactory );
// Note: This registration scheme is currently not compatible with LQT, since that doesn't
// have its own content model, just islqttalkpage. LQT pages will be passed to the wikitext
// MessagePoster.
/**
* Register a MessagePoster subclass for a given content model.
*
* @param {string} contentModel Content model of pages this MessagePoster can post to
* @param {Function} constructor Constructor of a MessagePoster subclass
*/
MessagePosterFactory.prototype.register = function ( contentModel, constructor ) {
if ( this.contentModelToClass[ contentModel ] !== undefined ) {
throw new Error( 'Content model "' + contentModel + '" is already registered' );
}
this.contentModelToClass[ contentModel ] = constructor;
};
/**
* Unregister a given content model.
* This is exposed for testing and should not normally be used.
*
* @param {string} contentModel Content model to unregister
*/
MessagePosterFactory.prototype.unregister = function ( contentModel ) {
delete this.contentModelToClass[ contentModel ];
};
/**
* Create a MessagePoster for given a title.
*
* A promise for this is returned. It works by determining the content model, then loading
* the corresponding module (which registers the MessagePoster class), and finally constructing
* an object for the given title.
*
* This does not require the message and should be called as soon as possible, so that the
* API and ResourceLoader requests run in the background.
*
* @param {mw.Title} title Title that will be posted to
* @param {string} [apiUrl] api.php URL if the title is on another wiki
* @return {jQuery.Promise} Promise resolving to a mw.messagePoster.MessagePoster.
* For failure, rejected with up to three arguments:
*
* - errorCode Error code string
* - error Error explanation
* - details Further error details
*/
MessagePosterFactory.prototype.create = function ( title, apiUrl ) {
var factory = this,
api = apiUrl ? new mw.ForeignApi( apiUrl ) : new mw.Api();
return api.get( {
formatversion: 2,
action: 'query',
prop: 'info',
titles: title.getPrefixedDb()
} ).then( function ( data ) {
var contentModel, moduleName, page = data.query.pages[ 0 ];
if ( !page ) {
return $.Deferred().reject( 'unexpected-response', 'Unexpected API response' );
}
contentModel = page.contentmodel;
moduleName = 'mediawiki.messagePoster.' + contentModel;
return mw.loader.using( moduleName ).then( function () {
return factory.createForContentModel(
contentModel,
title,
api
);
}, function () {
return $.Deferred().reject( 'failed-to-load-module', 'Failed to load "' + moduleName + '"' );
} );
}, function ( error, details ) {
return $.Deferred().reject( 'content-model-query-failed', error, details );
} );
};
/**
* Creates a MessagePoster instance, given a title and content model
*
* @private
* @param {string} contentModel Content model of title
* @param {mw.Title} title Title being posted to
* @param {mw.Api} api mw.Api instance that the instance should use
* @return {mw.messagePoster.MessagePoster}
*/
MessagePosterFactory.prototype.createForContentModel = function ( contentModel, title, api ) {
return new this.contentModelToClass[ contentModel ]( title, api );
};
mw.messagePoster = {
factory: new MessagePosterFactory()
};
}( mediaWiki, jQuery ) );
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