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 ( $, mw ) {
   8
   9         /**
  10          * Mixin for title widgets
  11          *
  12          * @class
  13          * @abstract
  14          *
  15          * @constructor
  16          * @param {Object} [config] Configuration options
  17          * @cfg {number} [limit=10] Number of results to show
  18          * @cfg {number} [namespace] Namespace to prepend to queries
  19          * @cfg {number} [maxLength=255] Maximum query length
  20          * @cfg {boolean} [relative=true] If a namespace is set, display titles relative to it
  21          * @cfg {boolean} [suggestions=true] Display search suggestions
  22          * @cfg {boolean} [showRedirectTargets=true] Show the targets of redirects
  23          * @cfg {boolean} [showRedlink] Show red link to exact match if it doesn't exist
  24          * @cfg {boolean} [showImages] Show page images
  25          * @cfg {boolean} [showDescriptions] Show page descriptions
  26          * @cfg {boolean} [validate=true] Whether the input must be a valid title
  27          * @cfg {Object} [cache] Result cache which implements a 'set' method, taking keyed values as an argument
  28          */
  29         mw.widgets.TitleWidget = function MwWidgetsTitleWidget( config ) {
  30                 var widget = this;
  31
  32                 // Config initialization
  33                 config = $.extend( {
  34                         maxLength: 255,
  35                         limit: 10
  36                 }, config );
  37
  38                 // Properties
  39                 this.limit = config.limit;
  40                 this.maxLength = config.maxLength;
  41                 this.namespace = config.namespace !== undefined ? config.namespace : null;
  42                 this.relative = config.relative !== undefined ? config.relative : true;
  43                 this.suggestions = config.suggestions !== undefined ? config.suggestions : true;
  44                 this.showRedirectTargets = config.showRedirectTargets !== false;
  45                 this.showRedlink = !!config.showRedlink;
  46                 this.showImages = !!config.showImages;
  47                 this.showDescriptions = !!config.showDescriptions;
  48                 this.validate = config.validate !== undefined ? config.validate : true;
  49                 this.cache = config.cache;
  50
  51                 // Initialization
  52                 this.$element.addClass( 'mw-widget-titleWidget' );
  53                 this.interwikiPrefixes = [];
  54                 this.interwikiPrefixesPromise = new mw.Api().get( {
  55                         action: 'query',
  56                         meta: 'siteinfo',
  57                         siprop: 'interwikimap'
  58                 } ).done( function ( data ) {
  59                         $.each( data.query.interwikimap, function ( index, interwiki ) {
  60                                 widget.interwikiPrefixes.push( interwiki.prefix );
  61                         } );
  62                 } );
  63         };
  64
  65         /* Setup */
  66
  67         OO.initClass( mw.widgets.TitleWidget );
  68
  69         /* Methods */
  70
  71         /**
  72          * Get the current value of the search query
  73          *
  74          * @abstract
  75          * @return {string} Search query
  76          */
  77         mw.widgets.TitleWidget.prototype.getQueryValue = null;
  78
  79         /**
  80          * Get the namespace to prepend to titles in suggestions, if any.
  81          *
  82          * @return {number|null} Namespace number
  83          */
  84         mw.widgets.TitleWidget.prototype.getNamespace = function () {
  85                 return this.namespace;
  86         };
  87
  88         /**
  89          * Set the namespace to prepend to titles in suggestions, if any.
  90          *
  91          * @param {number|null} namespace Namespace number
  92          */
  93         mw.widgets.TitleWidget.prototype.setNamespace = function ( namespace ) {
  94                 this.namespace = namespace;
  95         };
  96
  97         /**
  98          * Get a promise which resolves with an API repsonse for suggested
  99          * links for the current query.
 100          */
 101         mw.widgets.TitleWidget.prototype.getSuggestionsPromise = function () {
 102                 var req,
 103                         query = this.getQueryValue(),
 104                         widget = this,
 105                         promiseAbortObject = { abort: function () {
 106                                 // Do nothing. This is just so OOUI doesn't break due to abort being undefined.
 107                         } };
 108
 109                 if ( mw.Title.newFromText( query ) ) {
 110                         return this.interwikiPrefixesPromise.then( function () {
 111                                 var params,
 112                                         interwiki = query.substring( 0, query.indexOf( ':' ) );
 113                                 if (
 114                                         interwiki && interwiki !== '' &&
 115                                         widget.interwikiPrefixes.indexOf( interwiki ) !== -1
 116                                 ) {
 117                                         return $.Deferred().resolve( { query: {
 118                                                 pages: [ {
 119                                                         title: query
 120                                                 } ]
 121                                         } } ).promise( promiseAbortObject );
 122                                 } else {
 123                                         params = {
 124                                                 action: 'query',
 125                                                 prop: [ 'info', 'pageprops' ],
 126                                                 generator: 'prefixsearch',
 127                                                 gpssearch: query,
 128                                                 gpsnamespace: widget.namespace !== null ? widget.namespace : undefined,
 129                                                 gpslimit: widget.limit,
 130                                                 ppprop: 'disambiguation'
 131                                         };
 132                                         if ( widget.showRedirectTargets ) {
 133                                                 params.redirects = true;
 134                                         }
 135                                         if ( widget.showImages ) {
 136                                                 params.prop.push( 'pageimages' );
 137                                                 params.pithumbsize = 80;
 138                                                 params.pilimit = widget.limit;
 139                                         }
 140                                         if ( widget.showDescriptions ) {
 141                                                 params.prop.push( 'pageterms' );
 142                                                 params.wbptterms = 'description';
 143                                         }
 144                                         req = new mw.Api().get( params );
 145                                         promiseAbortObject.abort = req.abort.bind( req ); // TODO ew
 146                                         return req;
 147                                 }
 148                         } ).promise( promiseAbortObject );
 149                 } else {
 150                         // Don't send invalid titles to the API.
 151                         // Just pretend it returned nothing so we can show the 'invalid title' section
 152                         return $.Deferred().resolve( {} ).promise( promiseAbortObject );
 153                 }
 154         };
 155
 156         /**
 157          * Get option widgets from the server response
 158          *
 159          * @param {Object} data Query result
 160          * @return {OO.ui.OptionWidget[]} Menu items
 161          */
 162         mw.widgets.TitleWidget.prototype.getOptionsFromData = function ( data ) {
 163                 var i, len, index, pageExists, pageExistsExact, suggestionPage, page, redirect, redirects,
 164                         items = [],
 165                         titles = [],
 166                         titleObj = mw.Title.newFromText( this.getQueryValue() ),
 167                         redirectsTo = {},
 168                         pageData = {};
 169
 170                 if ( data.redirects ) {
 171                         for ( i = 0, len = data.redirects.length; i < len; i++ ) {
 172                                 redirect = data.redirects[ i ];
 173                                 redirectsTo[ redirect.to ] = redirectsTo[ redirect.to ] || [];
 174                                 redirectsTo[ redirect.to ].push( redirect.from );
 175                         }
 176                 }
 177
 178                 for ( index in data.pages ) {
 179                         suggestionPage = data.pages[ index ];
 180                         pageData[ suggestionPage.title ] = {
 181                                 missing: suggestionPage.missing !== undefined,
 182                                 redirect: suggestionPage.redirect !== undefined,
 183                                 disambiguation: OO.getProp( suggestionPage, 'pageprops', 'disambiguation' ) !== undefined,
 184                                 imageUrl: OO.getProp( suggestionPage, 'thumbnail', 'source' ),
 185                                 description: OO.getProp( suggestionPage, 'terms', 'description' ),
 186                                 // sort index
 187                                 index: suggestionPage.index
 188                         };
 189
 190                         // Throw away pages from wrong namespaces. This can happen when 'showRedirectTargets' is true
 191                         // and we encounter a cross-namespace redirect.
 192                         if ( this.namespace === null || this.namespace === suggestionPage.ns ) {
 193                                 titles.push( suggestionPage.title );
 194                         }
 195
 196                         redirects = redirectsTo[ suggestionPage.title ] || [];
 197                         for ( i = 0, len = redirects.length; i < len; i++ ) {
 198                                 pageData[ redirects[ i ] ] = {
 199                                         missing: false,
 200                                         redirect: true,
 201                                         disambiguation: false,
 202                                         description: mw.msg( 'mw-widgets-titleinput-description-redirect', suggestionPage.title )
 203                                 };
 204                                 titles.push( redirects[ i ] );
 205                         }
 206                 }
 207
 208                 titles.sort( function ( a, b ) {
 209                         return pageData[ a ].index - pageData[ b ].index;
 210                 } );
 211
 212                 // If not found, run value through mw.Title to avoid treating a match as a
 213                 // mismatch where normalisation would make them matching (bug 48476)
 214
 215                 pageExistsExact = titles.indexOf( this.getQueryValue() ) !== -1;
 216                 pageExists = pageExistsExact || (
 217                         titleObj && titles.indexOf( titleObj.getPrefixedText() ) !== -1
 218                 );
 219
 220                 if ( !pageExists ) {
 221                         pageData[ this.getQueryValue() ] = {
 222                                 missing: true, redirect: false, disambiguation: false,
 223                                 description: mw.msg( 'mw-widgets-titleinput-description-new-page' )
 224                         };
 225                 }
 226
 227                 if ( this.cache ) {
 228                         this.cache.set( pageData );
 229                 }
 230
 231                 // Offer the exact text as a suggestion if the page exists
 232                 if ( pageExists && !pageExistsExact ) {
 233                         titles.unshift( this.getQueryValue() );
 234                 }
 235                 // Offer the exact text as a new page if the title is valid
 236                 if ( this.showRedlink && !pageExists && titleObj ) {
 237                         titles.push( this.getQueryValue() );
 238                 }
 239                 for ( i = 0, len = titles.length; i < len; i++ ) {
 240                         page = pageData[ titles[ i ] ] || {};
 241                         items.push( new mw.widgets.TitleOptionWidget( this.getOptionWidgetData( titles[ i ], page ) ) );
 242                 }
 243
 244                 return items;
 245         };
 246
 247         /**
 248          * Get menu option widget data from the title and page data
 249          *
 250          * @param {string} title Title object
 251          * @param {Object} data Page data
 252          * @return {Object} Data for option widget
 253          */
 254         mw.widgets.TitleWidget.prototype.getOptionWidgetData = function ( title, data ) {
 255                 var mwTitle = new mw.Title( title );
 256                 return {
 257                         data: this.namespace !== null && this.relative
 258                                 ? mwTitle.getRelativeText( this.namespace )
 259                                 : title,
 260                         url: mwTitle.getUrl(),
 261                         imageUrl: this.showImages ? data.imageUrl : null,
 262                         description: this.showDescriptions ? data.description : null,
 263                         missing: data.missing,
 264                         redirect: data.redirect,
 265                         disambiguation: data.disambiguation,
 266                         query: this.getQueryValue()
 267                 };
 268         };
 269
 270         /**
 271          * Get title object corresponding to given value, or #getQueryValue if not given.
 272          *
 273          * @param {string} [value] Value to get a title for
 274          * @return {mw.Title|null} Title object, or null if value is invalid
 275          */
 276         mw.widgets.TitleWidget.prototype.getTitle = function ( value ) {
 277                 var title = value !== undefined ? value : this.getQueryValue(),
 278                         // mw.Title doesn't handle null well
 279                         titleObj = mw.Title.newFromText( title, this.namespace !== null ? this.namespace : undefined );
 280
 281                 return titleObj;
 282         };
 283
 284         /**
 285          * Check if the query is valid
 286          *
 287          * @return {boolean} The query is valid
 288          */
 289         mw.widgets.TitleWidget.prototype.isQueryValid = function () {
 290                 return this.validate ? !!this.getTitle() : true;
 291         };
 292
 293 }( jQuery, mediaWiki ) );