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/*!
* MediaWiki Widgets - CategoryMultiselectWidget 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,
NS_CATEGORY = mw.config.get( 'wgNamespaceIds' ).category;
/**
* @classdesc Displays an {@link OO.ui.MenuTagMultiselectWidget}
* and autocompletes with available categories.
*
* @example
* mw.loader.using( 'mediawiki.widgets.CategoryMultiselectWidget', function () {
* let selector = new mw.widgets.CategoryMultiselectWidget( {
* searchTypes: [
* mw.widgets.CategoryMultiselectWidget.SearchType.OpenSearch,
* mw.widgets.CategoryMultiselectWidget.SearchType.InternalSearch
* ]
* } );
*
* $( document.body ).append( selector.$element );
*
* selector.setSearchTypes( [ mw.widgets.CategoryMultiselectWidget.SearchType.SubCategories ] );
* } );
*
* @class mw.widgets.CategoryMultiselectWidget
* @uses mw.Api
* @extends OO.ui.MenuTagMultiselectWidget
* @mixes OO.ui.mixin.PendingElement
*
* @constructor
* @description Create an instance of `mw.widgets.CategoryMultiselectWidget`.
* @param {Object} [config] Configuration options
* @param {mw.Api} [config.api] Instance of mw.Api (or subclass thereof) to use for queries
* @param {number} [config.limit=10] Maximum number of results to load
* @param {mw.widgets.CategoryMultiselectWidget.SearchType[]} [config.searchTypes=[mw.widgets.CategoryMultiselectWidget.SearchType.OpenSearch]]
* Default search API to use when searching.
*/
mw.widgets.CategoryMultiselectWidget = function MWCategoryMultiselectWidget( config ) {
// Config initialization
config = Object.assign( {
limit: 10,
searchTypes: [ mw.widgets.CategoryMultiselectWidget.SearchType.OpenSearch ],
placeholder: mw.msg( 'mw-widgets-categoryselector-add-category-placeholder' )
}, config );
this.limit = config.limit;
this.searchTypes = config.searchTypes;
this.validateSearchTypes();
// Parent constructor
mw.widgets.CategoryMultiselectWidget.super.call( this, $.extend( true, {}, config, {
menu: {
filterFromInput: false
},
// This allows the user to both select non-existent categories, and prevents the selector from
// being wiped from #onMenuItemsChange when we change the available options in the dropdown
allowArbitrary: true
} ) );
// Mixin constructors
OO.ui.mixin.PendingElement.call( this, Object.assign( {}, config, { $pending: this.$handle } ) );
// Event handler to call the autocomplete methods
this.input.$input.on( 'change input cut paste', OO.ui.debounce( this.updateMenuItems.bind( this ), 100 ) );
// Initialize
this.api = config.api || new mw.Api();
this.searchCache = {};
};
/* Setup */
OO.inheritClass( mw.widgets.CategoryMultiselectWidget, OO.ui.MenuTagMultiselectWidget );
OO.mixinClass( mw.widgets.CategoryMultiselectWidget, OO.ui.mixin.PendingElement );
/* Methods */
/**
* Gets new items based on the input by calling
* {@link #getNewMenuItems getNewItems} and updates the menu
* after removing duplicates based on the data value.
*
* @private
* @method
*/
mw.widgets.CategoryMultiselectWidget.prototype.updateMenuItems = function () {
this.getMenu().clearItems();
this.getNewMenuItems( this.input.$input.val() ).then( ( items ) => {
const menu = this.getMenu();
// Never show the menu if the input lost focus in the meantime
if ( !this.input.$input.is( ':focus' ) ) {
return;
}
// Array of strings of the data of OO.ui.MenuOptionsWidgets
const existingItems = menu.getItems().map( ( item ) => item.data );
// Remove if items' data already exists
let filteredItems = items.filter( ( item ) => !existingItems.includes( item ) );
// Map to an array of OO.ui.MenuOptionWidgets
filteredItems = filteredItems.map( ( item ) => new OO.ui.MenuOptionWidget( {
data: item,
label: item
} ) );
menu.addItems( filteredItems ).toggle( true );
} );
};
/**
* @inheritdoc
*/
mw.widgets.CategoryMultiselectWidget.prototype.clearInput = function () {
mw.widgets.CategoryMultiselectWidget.super.prototype.clearInput.call( this );
// Abort all pending requests, we won't need their results
this.api.abort();
};
/**
* Searches for categories based on the input.
*
* @private
* @method
* @param {string} input The input used to prefix search categories
* @return {jQuery.Promise} Resolves with an array of categories
*/
mw.widgets.CategoryMultiselectWidget.prototype.getNewMenuItems = function ( input ) {
const deferred = $.Deferred();
if ( input.trim() === '' ) {
deferred.resolve( [] );
return deferred.promise();
}
// Abort all pending requests, we won't need their results
this.api.abort();
const promises = [];
for ( let i = 0; i < this.searchTypes.length; i++ ) {
promises.push( this.searchCategories( input, this.searchTypes[ i ] ) );
}
this.pushPending();
$.when( ...promises ).done( ( ...dataSets ) => {
// Flatten array
const allData = [].concat( ...dataSets );
const categoryNames = allData
// Remove duplicates
.filter( ( value, index, arr ) => arr.indexOf( value ) === index )
// Get Title objects
.map( ( name ) => mw.Title.newFromText( name ) )
// Keep only titles from 'Category' namespace
.filter( ( title ) => title && title.getNamespaceId() === NS_CATEGORY )
// Convert back to strings, strip 'Category:' prefix
.map( ( title ) => title.getMainText() );
deferred.resolve( categoryNames );
} ).always( this.popPending.bind( this ) );
return deferred.promise();
};
/**
* @inheritdoc
*/
mw.widgets.CategoryMultiselectWidget.prototype.isAllowedData = function ( data ) {
const title = mw.Title.makeTitle( NS_CATEGORY, data );
if ( !title ) {
return false;
}
return mw.widgets.CategoryMultiselectWidget.super.prototype.isAllowedData.call( this, data );
};
/**
* @inheritdoc
*/
mw.widgets.CategoryMultiselectWidget.prototype.createTagItemWidget = function ( data ) {
const title = mw.Title.makeTitle( NS_CATEGORY, data );
return new mw.widgets.CategoryTagItemWidget( {
apiUrl: this.api.apiUrl || undefined,
title: title
} );
};
/**
* @inheritdoc
*/
mw.widgets.CategoryMultiselectWidget.prototype.findItemFromData = function ( data ) {
// This is a bit of a hack... We have to canonicalize the data in the same way that
// #createItemWidget and CategoryTagItemWidget will do, otherwise we won't find duplicates.
const title = mw.Title.makeTitle( NS_CATEGORY, data );
if ( !title ) {
return null;
}
return OO.ui.mixin.GroupElement.prototype.findItemFromData.call( this, title.getMainText() );
};
/**
* Validates the values in `this.searchType`.
*
* @private
* @return {boolean}
*/
mw.widgets.CategoryMultiselectWidget.prototype.validateSearchTypes = function () {
let validSearchTypes = false;
const searchTypeEnumCount = Object.keys( mw.widgets.CategoryMultiselectWidget.SearchType ).length;
// Check if all values are in the SearchType enum
validSearchTypes = this.searchTypes.every( ( searchType ) => searchType > -1 && searchType < searchTypeEnumCount );
if ( validSearchTypes === false ) {
throw new Error( 'Unknown searchType in searchTypes' );
}
// If the searchTypes has mw.widgets.CategoryMultiselectWidget.SearchType.SubCategories
// it can be the only search type.
if ( this.searchTypes.includes( mw.widgets.CategoryMultiselectWidget.SearchType.SubCategories ) &&
this.searchTypes.length > 1
) {
throw new Error( 'Can\'t have additional search types with mw.widgets.CategoryMultiselectWidget.SearchType.SubCategories' );
}
// If the searchTypes has mw.widgets.CategoryMultiselectWidget.SearchType.ParentCategories
// it can be the only search type.
if ( this.searchTypes.includes( mw.widgets.CategoryMultiselectWidget.SearchType.ParentCategories ) &&
this.searchTypes.length > 1
) {
throw new Error( 'Can\'t have additional search types with mw.widgets.CategoryMultiselectWidget.SearchType.ParentCategories' );
}
return true;
};
/**
* Sets and validates the value of `this.searchType`.
*
* @param {mw.widgets.CategoryMultiselectWidget.SearchType[]} searchTypes
*/
mw.widgets.CategoryMultiselectWidget.prototype.setSearchTypes = function ( searchTypes ) {
this.searchTypes = searchTypes;
this.validateSearchTypes();
};
/**
* Searches categories based on input and searchType.
*
* @private
* @method
* @param {string} input The input used to prefix search categories
* @param {mw.widgets.CategoryMultiselectWidget.SearchType} searchType
* @return {jQuery.Promise} Resolves with an array of categories
*/
mw.widgets.CategoryMultiselectWidget.prototype.searchCategories = function ( input, searchType ) {
const deferred = $.Deferred(),
cacheKey = input + searchType.toString();
// Check cache
if ( hasOwn.call( this.searchCache, cacheKey ) ) {
return this.searchCache[ cacheKey ];
}
switch ( searchType ) {
case mw.widgets.CategoryMultiselectWidget.SearchType.OpenSearch:
this.api.get( {
formatversion: 2,
action: 'opensearch',
namespace: NS_CATEGORY,
limit: this.limit,
search: input
} ).done( ( res ) => {
const categories = res[ 1 ];
deferred.resolve( categories );
} ).fail( deferred.reject.bind( deferred ) );
break;
case mw.widgets.CategoryMultiselectWidget.SearchType.InternalSearch:
this.api.get( {
formatversion: 2,
action: 'query',
list: 'allpages',
apnamespace: NS_CATEGORY,
aplimit: this.limit,
apfrom: input,
apprefix: input
} ).done( ( res ) => {
const categories = res.query.allpages.map( ( page ) => page.title );
deferred.resolve( categories );
} ).fail( deferred.reject.bind( deferred ) );
break;
case mw.widgets.CategoryMultiselectWidget.SearchType.Exists:
if ( input.includes( '|' ) ) {
deferred.resolve( [] );
break;
}
this.api.get( {
formatversion: 2,
action: 'query',
prop: 'info',
titles: 'Category:' + input
} ).done( ( res ) => {
const categories = [];
res.query.pages.forEach( ( page ) => {
if ( !page.missing ) {
categories.push( page.title );
}
} );
deferred.resolve( categories );
} ).fail( deferred.reject.bind( deferred ) );
break;
case mw.widgets.CategoryMultiselectWidget.SearchType.SubCategories:
if ( input.includes( '|' ) ) {
deferred.resolve( [] );
break;
}
this.api.get( {
formatversion: 2,
action: 'query',
list: 'categorymembers',
cmtype: 'subcat',
cmlimit: this.limit,
cmtitle: 'Category:' + input
} ).done( ( res ) => {
const categories = res.query.categorymembers.map( ( category ) => category.title );
deferred.resolve( categories );
} ).fail( deferred.reject.bind( deferred ) );
break;
case mw.widgets.CategoryMultiselectWidget.SearchType.ParentCategories:
if ( input.includes( '|' ) ) {
deferred.resolve( [] );
break;
}
this.api.get( {
formatversion: 2,
action: 'query',
prop: 'categories',
cllimit: this.limit,
titles: 'Category:' + input
} ).done( ( res ) => {
const categories = [];
res.query.pages.forEach( ( page ) => {
if ( !page.missing && Array.isArray( page.categories ) ) {
categories.push( ...page.categories.map( ( category ) => category.title ) );
}
} );
deferred.resolve( categories );
} ).fail( deferred.reject.bind( deferred ) );
break;
default:
throw new Error( 'Unknown searchType' );
}
// Cache the result
this.searchCache[ cacheKey ] = deferred.promise();
return deferred.promise();
};
/**
* @enum mw.widgets.CategoryMultiselectWidget.SearchType
* Types of search available.
*/
mw.widgets.CategoryMultiselectWidget.SearchType = {
/** Search using action=opensearch */
OpenSearch: 0,
/** Search using action=query */
InternalSearch: 1,
/** Search for existing categories with the exact title */
Exists: 2,
/** Search only subcategories */
SubCategories: 3,
/** Search only parent categories */
ParentCategories: 4
};
}() );