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/*!
* MediaWiki Widgets - CategoryTagItemWidget class.
*
* @copyright 2011-2015 MediaWiki Widgets Team and others; see AUTHORS.txt
* @license The MIT License (MIT); see LICENSE.txt
*/
( function () {
const hasOwn = Object.prototype.hasOwnProperty;
/**
* @class mw.widgets.PageExistenceCache
* @private
* @param {mw.Api} [api]
*/
function PageExistenceCache( api ) {
this.api = api || new mw.Api();
this.processExistenceCheckQueueDebounced = OO.ui.debounce( this.processExistenceCheckQueue );
this.currentRequest = null;
this.existenceCache = {};
this.existenceCheckQueue = {};
}
/**
* Check for existence of pages in the queue.
*
* @private
*/
PageExistenceCache.prototype.processExistenceCheckQueue = function () {
if ( this.currentRequest ) {
// Don't fire off a million requests at the same time
this.currentRequest.always( () => {
this.currentRequest = null;
this.processExistenceCheckQueueDebounced();
} );
return;
}
const queue = this.existenceCheckQueue;
this.existenceCheckQueue = {};
const titles = Object.keys( queue ).filter( ( title ) => {
if ( hasOwn.call( this.existenceCache, title ) ) {
queue[ title ].resolve( this.existenceCache[ title ] );
}
return !hasOwn.call( this.existenceCache, title );
} );
if ( !titles.length ) {
return;
}
this.currentRequest = this.api.get( {
formatversion: 2,
action: 'query',
prop: [ 'info' ],
titles: titles
} ).done( ( response ) => {
const
normalized = {},
pages = {};
( response.query.normalized || [] ).forEach( ( data ) => {
normalized[ data.fromencoded ? decodeURIComponent( data.from ) : data.from ] = data.to;
} );
response.query.pages.forEach( ( page ) => {
pages[ page.title ] = !page.missing;
} );
titles.forEach( ( title ) => {
let normalizedTitle = title;
while ( hasOwn.call( normalized, normalizedTitle ) ) {
normalizedTitle = normalized[ normalizedTitle ];
}
this.existenceCache[ title ] = pages[ normalizedTitle ];
queue[ title ].resolve( this.existenceCache[ title ] );
} );
} );
};
/**
* Register a request to check whether a page exists.
*
* @private
* @param {mw.Title} title
* @return {jQuery.Promise} Promise resolved with true if the page exists or false otherwise
*/
PageExistenceCache.prototype.checkPageExistence = function ( title ) {
const key = title.getPrefixedText();
if ( !hasOwn.call( this.existenceCheckQueue, key ) ) {
this.existenceCheckQueue[ key ] = $.Deferred();
}
this.processExistenceCheckQueueDebounced();
return this.existenceCheckQueue[ key ].promise();
};
/**
* @class mw.widgets.ForeignTitle
* @private
* @extends mw.Title
*
* @constructor
* @param {string} title
* @param {number} [namespace]
*/
function ForeignTitle( title, namespace ) {
// We only need to handle categories here... but we don't know the target language.
// So assume that any namespace-like prefix is the 'Category' namespace...
title = title.replace( /^(.+?)_*:_*(.*)$/, 'Category:$2' ); // HACK
ForeignTitle.super.call( this, title, namespace );
}
OO.inheritClass( ForeignTitle, mw.Title );
ForeignTitle.prototype.getNamespacePrefix = function () {
// We only need to handle categories here...
return 'Category:'; // HACK
};
/**
* @classdesc Extends OO.ui.TagItemWidget with the ability to link to the given page,
* and to show its existence status (whether it is a redlink).
*
* @class mw.widgets.CategoryTagItemWidget
* @uses mw.Api
* @extends OO.ui.TagItemWidget
*
* @constructor
* @description Create an instance of `mw.widgets.CategoryTagItemWidget`.
* @param {Object} config Configuration options
* @param {mw.Title} config.title Page title to use (required)
* @param {string} [config.apiUrl] API URL, if not the current wiki's API
*/
mw.widgets.CategoryTagItemWidget = function MWWCategoryTagItemWidget( config ) {
// Parent constructor
mw.widgets.CategoryTagItemWidget.super.call( this, Object.assign( {
data: config.title.getMainText(),
label: config.title.getMainText()
}, config ) );
// Properties
this.title = config.title;
this.apiUrl = config.apiUrl || '';
this.$link = $( '<a>' )
.text( this.label )
.attr( 'target', '_blank' )
.on( 'click', ( e ) => {
// TagMultiselectWidget really wants to prevent you from clicking the link, don't let it
e.stopPropagation();
} );
// Initialize
this.setMissing( false );
this.$label.replaceWith( this.$link );
this.setLabelElement( this.$link );
if ( !this.constructor.static.pageExistenceCaches[ this.apiUrl ] ) {
this.constructor.static.pageExistenceCaches[ this.apiUrl ] =
new PageExistenceCache( new mw.ForeignApi( this.apiUrl ) );
}
this.constructor.static.pageExistenceCaches[ this.apiUrl ]
.checkPageExistence( new ForeignTitle( this.title.getPrefixedText() ) )
.done( ( exists ) => {
this.setMissing( !exists );
} );
};
/* Setup */
OO.inheritClass( mw.widgets.CategoryTagItemWidget, OO.ui.TagItemWidget );
/* Static Properties */
/**
* Map of API URLs to PageExistenceCache objects.
*
* @static
* @inheritable
* @type {Object}
* @name mw.widgets.CategoryTagItemWidget.pageExistenceCaches
*/
mw.widgets.CategoryTagItemWidget.static.pageExistenceCaches = {
'': new PageExistenceCache()
};
/* Methods */
/**
* Update label link href and CSS classes to reflect page existence status.
*
* @private
* @param {boolean} missing Whether the page is missing (does not exist)
*/
mw.widgets.CategoryTagItemWidget.prototype.setMissing = function ( missing ) {
const
title = new ForeignTitle( this.title.getPrefixedText() ), // HACK
prefix = this.apiUrl.replace( '/w/api.php', '' ); // HACK
this.missing = missing;
if ( !missing ) {
this.$link
.attr( 'href', prefix + title.getUrl() )
.attr( 'title', title.getPrefixedText() )
.removeClass( 'new' );
} else {
this.$link
.attr( 'href', prefix + title.getUrl( { action: 'edit', redlink: 1 } ) )
.attr( 'title', mw.msg( 'red-link-title', title.getPrefixedText() ) )
.addClass( 'new' );
}
};
}() );