resources/src/mediawiki.widgets/mw.widgets.TitleWidget.js

   1 /*!
   2  * MediaWiki Widgets - TitleWidget class.
   3  *
   4  * @copyright 2011-2015 MediaWiki Widgets Team and others; see AUTHORS.txt
   5  * @license The MIT License (MIT); see LICENSE.txt
   6  */
   7 ( function () {
   8         var hasOwn = Object.prototype.hasOwnProperty;
   9
  10         /**
  11          * Mixin for title widgets
  12          *
  13          * @class
  14          * @abstract
  15          *
  16          * @constructor
  17          * @param {Object} [config] Configuration options
  18          * @cfg {number} [limit=10] Number of results to show
  19          * @cfg {number} [namespace] Namespace to prepend to queries
  20          * @cfg {number} [maxLength=255] Maximum query length
  21          * @cfg {boolean} [relative=true] If a namespace is set, display titles relative to it
  22          * @cfg {boolean} [suggestions=true] Display search suggestions
  23          * @cfg {boolean} [showRedirectTargets=true] Show the targets of redirects
  24          * @cfg {boolean} [showImages] Show page images
  25          * @cfg {boolean} [showDescriptions] Show page descriptions
  26          * @cfg {boolean} [showMissing=true] Show missing pages
  27          * @cfg {boolean} [addQueryInput=true] Add exact user's input query to results
  28          * @cfg {boolean} [excludeCurrentPage] Exclude the current page from suggestions
  29          * @cfg {boolean} [validateTitle=true] Whether the input must be a valid title
  30          * @cfg {boolean} [required=false] Whether the input must not be empty
  31          * @cfg {Object} [cache] Result cache which implements a 'set' method, taking keyed values as an argument
  32          * @cfg {mw.Api} [api] API object to use, creates a default mw.Api instance if not specified
  33          */
  34         mw.widgets.TitleWidget = function MwWidgetsTitleWidget( config ) {
  35                 // Config initialization
  36                 config = $.extend( {
  37                         maxLength: 255,
  38                         limit: 10
  39                 }, config );
  40
  41                 // Properties
  42                 this.limit = config.limit;
  43                 this.maxLength = config.maxLength;
  44                 this.namespace = config.namespace !== undefined ? config.namespace : null;
  45                 this.relative = config.relative !== undefined ? config.relative : true;
  46                 this.suggestions = config.suggestions !== undefined ? config.suggestions : true;
  47                 this.showRedirectTargets = config.showRedirectTargets !== false;
  48                 this.showImages = !!config.showImages;
  49                 this.showDescriptions = !!config.showDescriptions;
  50                 this.showMissing = config.showMissing !== false;
  51                 this.addQueryInput = config.addQueryInput !== false;
  52                 this.excludeCurrentPage = !!config.excludeCurrentPage;
  53                 this.validateTitle = config.validateTitle !== undefined ? config.validateTitle : true;
  54                 this.cache = config.cache;
  55                 this.api = config.api || new mw.Api();
  56                 // Supports: IE10, FF28, Chrome23
  57                 this.compare = window.Intl && Intl.Collator ?
  58                         new Intl.Collator( mw.config.get( 'wgContentLanguage' ), { sensitivity: 'base' } ).compare :
  59                         null;
  60
  61                 // Initialization
  62                 this.$element.addClass( 'mw-widget-titleWidget' );
  63         };
  64
  65         /* Setup */
  66
  67         OO.initClass( mw.widgets.TitleWidget );
  68
  69         /* Static properties */
  70
  71         mw.widgets.TitleWidget.static.interwikiPrefixesPromiseCache = {};
  72
  73         /* Methods */
  74
  75         /**
  76          * Get the current value of the search query
  77          *
  78          * @abstract
  79          * @return {string} Search query
  80          */
  81         mw.widgets.TitleWidget.prototype.getQueryValue = null;
  82
  83         /**
  84          * Get the namespace to prepend to titles in suggestions, if any.
  85          *
  86          * @return {number|null} Namespace number
  87          */
  88         mw.widgets.TitleWidget.prototype.getNamespace = function () {
  89                 return this.namespace;
  90         };
  91
  92         /**
  93          * Set the namespace to prepend to titles in suggestions, if any.
  94          *
  95          * @param {number|null} namespace Namespace number
  96          */
  97         mw.widgets.TitleWidget.prototype.setNamespace = function ( namespace ) {
  98                 this.namespace = namespace;
  99         };
 100
 101         mw.widgets.TitleWidget.prototype.getInterwikiPrefixesPromise = function () {
 102                 var api = this.getApi(),
 103                         cache = this.constructor.static.interwikiPrefixesPromiseCache,
 104                         key = api.defaults.ajax.url;
 105                 if ( !Object.prototype.hasOwnProperty.call( cache, key ) ) {
 106                         cache[ key ] = api.get( {
 107                                 action: 'query',
 108                                 meta: 'siteinfo',
 109                                 siprop: 'interwikimap',
 110                                 // Cache client-side for a day since this info is mostly static
 111                                 maxage: 60 * 60 * 24,
 112                                 smaxage: 60 * 60 * 24,
 113                                 // Workaround T97096 by setting uselang=content
 114                                 uselang: 'content'
 115                         } ).then( function ( data ) {
 116                                 return data.query.interwikimap.map( function ( interwiki ) {
 117                                         return interwiki.prefix;
 118                                 } );
 119                         } );
 120                 }
 121                 return cache[ key ];
 122         };
 123
 124         /**
 125          * Get a promise which resolves with an API repsonse for suggested
 126          * links for the current query.
 127          *
 128          * @return {jQuery.Promise} Suggestions promise
 129          */
 130         mw.widgets.TitleWidget.prototype.getSuggestionsPromise = function () {
 131                 var req,
 132                         api = this.getApi(),
 133                         query = this.getQueryValue(),
 134                         widget = this,
 135                         promiseAbortObject = { abort: function () {
 136                                 // Do nothing. This is just so OOUI doesn't break due to abort being undefined.
 137                         } };
 138
 139                 if ( !mw.Title.newFromText( query ) ) {
 140                         // Don't send invalid titles to the API.
 141                         // Just pretend it returned nothing so we can show the 'invalid title' section
 142                         return $.Deferred().resolve( {} ).promise( promiseAbortObject );
 143                 }
 144
 145                 return this.getInterwikiPrefixesPromise().then( function ( interwikiPrefixes ) {
 146                         var interwiki = query.substring( 0, query.indexOf( ':' ) );
 147                         if (
 148                                 interwiki && interwiki !== '' &&
 149                                 interwikiPrefixes.indexOf( interwiki ) !== -1
 150                         ) {
 151                                 return $.Deferred().resolve( { query: {
 152                                         pages: [ {
 153                                                 title: query
 154                                         } ]
 155                                 } } ).promise( promiseAbortObject );
 156                         } else {
 157                                 req = api.get( widget.getApiParams( query ) );
 158                                 promiseAbortObject.abort = req.abort.bind( req ); // TODO ew
 159                                 return req.then( function ( ret ) {
 160                                         if ( widget.showMissing && ret.query === undefined ) {
 161                                                 ret = api.get( { action: 'query', titles: query } );
 162                                                 promiseAbortObject.abort = ret.abort.bind( ret );
 163                                         }
 164                                         return ret;
 165                                 } );
 166                         }
 167                 } ).promise( promiseAbortObject );
 168         };
 169
 170         /**
 171          * Get API params for a given query
 172          *
 173          * @param {string} query User query
 174          * @return {Object} API params
 175          */
 176         mw.widgets.TitleWidget.prototype.getApiParams = function ( query ) {
 177                 var params = {
 178                         action: 'query',
 179                         prop: [ 'info', 'pageprops' ],
 180                         generator: 'prefixsearch',
 181                         gpssearch: query,
 182                         gpsnamespace: this.namespace !== null ? this.namespace : undefined,
 183                         gpslimit: this.limit,
 184                         ppprop: 'disambiguation'
 185                 };
 186                 if ( this.showRedirectTargets ) {
 187                         params.redirects = true;
 188                 }
 189                 if ( this.showImages ) {
 190                         params.prop.push( 'pageimages' );
 191                         params.pithumbsize = 80;
 192                         params.pilimit = this.limit;
 193                 }
 194                 if ( this.showDescriptions ) {
 195                         params.prop.push( 'description' );
 196                 }
 197                 return params;
 198         };
 199
 200         /**
 201          * Get the API object for title requests
 202          *
 203          * @return {mw.Api} MediaWiki API
 204          */
 205         mw.widgets.TitleWidget.prototype.getApi = function () {
 206                 return this.api;
 207         };
 208
 209         /**
 210          * Get option widgets from the server response
 211          *
 212          * @param {Object} data Query result
 213          * @return {OO.ui.OptionWidget[]} Menu items
 214          */
 215         mw.widgets.TitleWidget.prototype.getOptionsFromData = function ( data ) {
 216                 var i, len, index, pageExists, pageExistsExact, suggestionPage, page, redirect, redirects,
 217                         currentPageName = new mw.Title( mw.config.get( 'wgRelevantPageName' ) ).getPrefixedText(),
 218                         items = [],
 219                         titles = [],
 220                         titleObj = mw.Title.newFromText( this.getQueryValue() ),
 221                         redirectsTo = {},
 222                         pageData = {};
 223
 224                 if ( data.redirects ) {
 225                         for ( i = 0, len = data.redirects.length; i < len; i++ ) {
 226                                 redirect = data.redirects[ i ];
 227                                 redirectsTo[ redirect.to ] = redirectsTo[ redirect.to ] || [];
 228                                 redirectsTo[ redirect.to ].push( redirect.from );
 229                         }
 230                 }
 231
 232                 for ( index in data.pages ) {
 233                         suggestionPage = data.pages[ index ];
 234
 235                         // When excludeCurrentPage is set, don't list the current page unless the user has type the full title
 236                         if ( this.excludeCurrentPage && suggestionPage.title === currentPageName && suggestionPage.title !== titleObj.getPrefixedText() ) {
 237                                 continue;
 238                         }
 239                         pageData[ suggestionPage.title ] = {
 240                                 known: suggestionPage.known !== undefined,
 241                                 missing: suggestionPage.missing !== undefined,
 242                                 redirect: suggestionPage.redirect !== undefined,
 243                                 disambiguation: OO.getProp( suggestionPage, 'pageprops', 'disambiguation' ) !== undefined,
 244                                 imageUrl: OO.getProp( suggestionPage, 'thumbnail', 'source' ),
 245                                 description: suggestionPage.description,
 246                                 // Sort index
 247                                 index: suggestionPage.index,
 248                                 originalData: suggestionPage
 249                         };
 250
 251                         // Throw away pages from wrong namespaces. This can happen when 'showRedirectTargets' is true
 252                         // and we encounter a cross-namespace redirect.
 253                         if ( this.namespace === null || this.namespace === suggestionPage.ns ) {
 254                                 titles.push( suggestionPage.title );
 255                         }
 256
 257                         redirects = hasOwn.call( redirectsTo, suggestionPage.title ) ? redirectsTo[ suggestionPage.title ] : [];
 258                         for ( i = 0, len = redirects.length; i < len; i++ ) {
 259                                 pageData[ redirects[ i ] ] = {
 260                                         missing: false,
 261                                         known: true,
 262                                         redirect: true,
 263                                         disambiguation: false,
 264                                         description: mw.msg( 'mw-widgets-titleinput-description-redirect', suggestionPage.title ),
 265                                         // Sort index, just below its target
 266                                         index: suggestionPage.index + 0.5,
 267                                         originalData: suggestionPage
 268                                 };
 269                                 titles.push( redirects[ i ] );
 270                         }
 271                 }
 272
 273                 titles.sort( function ( a, b ) {
 274                         return pageData[ a ].index - pageData[ b ].index;
 275                 } );
 276
 277                 // If not found, run value through mw.Title to avoid treating a match as a
 278                 // mismatch where normalisation would make them matching (T50476)
 279
 280                 pageExistsExact = (
 281                         hasOwn.call( pageData, this.getQueryValue() ) &&
 282                         (
 283                                 !pageData[ this.getQueryValue() ].missing ||
 284                                 pageData[ this.getQueryValue() ].known
 285                         )
 286                 );
 287                 pageExists = pageExistsExact || (
 288                         titleObj &&
 289                         hasOwn.call( pageData, titleObj.getPrefixedText() ) &&
 290                         (
 291                                 !pageData[ titleObj.getPrefixedText() ].missing ||
 292                                 pageData[ titleObj.getPrefixedText() ].known
 293                         )
 294                 );
 295
 296                 if ( this.cache ) {
 297                         this.cache.set( pageData );
 298                 }
 299
 300                 // Offer the exact text as a suggestion if the page exists
 301                 if ( this.addQueryInput && pageExists && !pageExistsExact ) {
 302                         titles.unshift( this.getQueryValue() );
 303                 }
 304
 305                 for ( i = 0, len = titles.length; i < len; i++ ) {
 306                         page = hasOwn.call( pageData, titles[ i ] ) ? pageData[ titles[ i ] ] : {};
 307                         items.push( this.createOptionWidget( this.getOptionWidgetData( titles[ i ], page ) ) );
 308                 }
 309
 310                 return items;
 311         };
 312
 313         /**
 314          * Create a menu option widget with specified data
 315          *
 316          * @param {Object} data Data for option widget
 317          * @return {OO.ui.MenuOptionWidget} Data for option widget
 318          */
 319         mw.widgets.TitleWidget.prototype.createOptionWidget = function ( data ) {
 320                 return new mw.widgets.TitleOptionWidget( data );
 321         };
 322
 323         /**
 324          * Get menu option widget data from the title and page data
 325          *
 326          * @param {string} title Title object
 327          * @param {Object} data Page data
 328          * @return {Object} Data for option widget
 329          */
 330         mw.widgets.TitleWidget.prototype.getOptionWidgetData = function ( title, data ) {
 331                 var mwTitle = new mw.Title( title ),
 332                         description = data.description;
 333                 if ( data.missing && !description ) {
 334                         description = mw.msg( 'mw-widgets-titleinput-description-new-page' );
 335                 }
 336                 return {
 337                         data: this.namespace !== null && this.relative ?
 338                                 mwTitle.getRelativeText( this.namespace ) :
 339                                 title,
 340                         url: mwTitle.getUrl(),
 341                         showImages: this.showImages,
 342                         imageUrl: this.showImages ? data.imageUrl : null,
 343                         description: this.showDescriptions ? description : null,
 344                         missing: data.missing,
 345                         redirect: data.redirect,
 346                         disambiguation: data.disambiguation,
 347                         query: this.getQueryValue(),
 348                         compare: this.compare
 349                 };
 350         };
 351
 352         /**
 353          * Get title object corresponding to given value, or #getQueryValue if not given.
 354          *
 355          * @param {string} [value] Value to get a title for
 356          * @return {mw.Title|null} Title object, or null if value is invalid
 357          */
 358         mw.widgets.TitleWidget.prototype.getMWTitle = function ( value ) {
 359                 var title = value !== undefined ? value : this.getQueryValue(),
 360                         // mw.Title doesn't handle null well
 361                         titleObj = mw.Title.newFromText( title, this.namespace !== null ? this.namespace : undefined );
 362
 363                 return titleObj;
 364         };
 365
 366         /**
 367          * Check if the query is valid
 368          *
 369          * @return {boolean} The query is valid
 370          */
 371         mw.widgets.TitleWidget.prototype.isQueryValid = function () {
 372                 if ( !this.validateTitle ) {
 373                         return true;
 374                 }
 375                 if ( !this.required && this.getQueryValue() === '' ) {
 376                         return true;
 377                 }
 378                 return !!this.getMWTitle();
 379         };
 380
 381 }() );