resources/mediawiki/mediawiki.Title.js

   1 /**
   2  * mediaWiki.Title
   3  *
   4  * @author Neil Kandalgaonkar, 2010
   5  * @author Timo Tijhof, 2011
   6  * @since 1.18
   7  *
   8  * Relies on: mw.config (wgFormattedNamespaces, wgNamespaceIds, wgCaseSensitiveNamespaces), mw.util.wikiGetlink
   9  */
  10 ( function( $ ) {
  11
  12         /* Local space */
  13
  14         /**
  15          * Title
  16          * @constructor
  17          *
  18          * @param title {String} Title of the page. If no second argument given,
  19          * this will be searched for a namespace.
  20          * @param namespace {Number} (optional) Namespace id. If given, title will be taken as-is.
  21          * @return {Title} this
  22          */
  23 var     Title = function( title, namespace ) {
  24                 this._ns = 0; // integer namespace id
  25                 this._name = null; // name in canonical 'database' form
  26                 this._ext = null; // extension
  27
  28                 if ( arguments.length === 2 ) {
  29                         setNameAndExtension( this, title );
  30                         this._ns = fixNsId( namespace );
  31                 } else if ( arguments.length === 1 ) {
  32                         setAll( this, title );
  33                 }
  34                 return this;
  35         },
  36
  37         /**
  38          * Strip some illegal chars: control chars, colon, less than, greater than,
  39          * brackets, braces, pipe, whitespace and normal spaces. This still leaves some insanity
  40          * intact, like unicode bidi chars, but it's a good start..
  41          * @param s {String}
  42          * @return {String}
  43          */
  44         clean = function( s ) {
  45                 if ( s !== undefined ) {
  46                         return s.replace( /[\x00-\x1f\x23\x3c\x3e\x5b\x5d\x7b\x7c\x7d\x7f\s]+/g, '_' );
  47                 }
  48         },
  49
  50         /**
  51          * Convert db-key to readable text.
  52          * @param s {String}
  53          * @return {String}
  54          */
  55         text = function ( s ) {
  56                 if ( s !== null && s !== undefined ) {
  57                         return s.replace( /_/g, ' ' );
  58                 } else {
  59                         return '';
  60                 }
  61         },
  62
  63         /**
  64          * Sanitize name.
  65          */
  66         fixName = function( s ) {
  67                 return clean( $.trim( s ) );
  68         },
  69
  70         /**
  71          * Sanitize name.
  72          */
  73         fixExt = function( s ) {
  74                 return clean( s );
  75         },
  76
  77         /**
  78          * Sanitize namespace id.
  79          * @param id {Number} Namespace id.
  80          * @return {Number|Boolean} The id as-is or boolean false if invalid.
  81          */
  82         fixNsId = function( id ) {
  83                 // wgFormattedNamespaces is an object of *string* key-vals (ie. arr["0"] not arr[0] )
  84                 var ns = mw.config.get( 'wgFormattedNamespaces' )[id.toString()];
  85
  86                 // Check only undefined (may be false-y, such as '' (main namespace) ).
  87                 if ( ns === undefined ) {
  88                         return false;
  89                 } else {
  90                         return Number( id );
  91                 }
  92         },
  93
  94         /**
  95          * Get namespace id from namespace name by any known namespace/id pair (localized, canonical or alias).
  96          *
  97          * @example On a German wiki this would return 6 for any of 'File', 'Datei', 'Image' or even 'Bild'.
  98          * @param ns {String} Namespace name (case insensitive, leading/trailing space ignored).
  99          * @return {Number|Boolean} Namespace id or boolean false if unrecognized.
 100          */
 101         getNsIdByName = function( ns ) {
 102                 // toLowerCase throws exception on null/undefined. Return early.
 103                 if ( ns == null ) {
 104                         return false;
 105                 }
 106                 ns = clean( $.trim( ns.toLowerCase() ) ); // Normalize
 107                 var id = mw.config.get( 'wgNamespaceIds' )[ns];
 108                 if ( id === undefined ) {
 109                         mw.log( 'mw.Title: Unrecognized namespace: ' + ns );
 110                         return false;
 111                 }
 112                 return fixNsId( id );
 113         },
 114
 115         /**
 116          * Helper to extract namespace, name and extension from a string.
 117          *
 118          * @param title {mw.Title}
 119          * @param raw {String}
 120          * @return {mw.Title}
 121          */
 122         setAll = function( title, s ) {
 123                 // In normal browsers the match-array contains null/undefined if there's no match,
 124                 // IE returns an empty string.
 125                 var     matches = s.match( /^(?:([^:]+):)?(.*?)(?:\.(\w{1,5}))?$/ ),
 126                         ns_match = getNsIdByName( matches[1] );
 127
 128                 // Namespace must be valid, and title must be a non-empty string.
 129                 if ( ns_match && typeof matches[2] === 'string' && matches[2] !== '' ) {
 130                         title._ns = ns_match;
 131                         title._name = fixName( matches[2] );
 132                         if ( typeof matches[3] === 'string' && matches[3] !== '' ) {
 133                                 title._ext = fixExt( matches[3] );
 134                         }
 135                 } else {
 136                         // Consistency with MediaWiki PHP: Unknown namespace -> fallback to main namespace.
 137                         title._ns = 0;
 138                         setNameAndExtension( title, s );
 139                 }
 140                 return title;
 141         },
 142
 143         /**
 144          * Helper to extract name and extension from a string.
 145          *
 146          * @param title {mw.Title}
 147          * @param raw {String}
 148          * @return {mw.Title}
 149          */
 150         setNameAndExtension = function( title, raw ) {
 151                 // In normal browsers the match-array contains null/undefined if there's no match,
 152                 // IE returns an empty string.
 153                 var matches = raw.match( /^(?:)?(.*?)(?:\.(\w{1,5}))?$/ );
 154
 155                 // Title must be a non-empty string.
 156                 if ( typeof matches[1] === 'string' && matches[1] !== '' ) {
 157                         title._name = fixName( matches[1] );
 158                         if ( typeof matches[2] === 'string' && matches[2] !== '' ) {
 159                                 title._ext = fixExt( matches[2] );
 160                         }
 161                 } else {
 162                         throw new Error( 'mw.Title: Could not parse title "' + raw + '"' );
 163                 }
 164                 return title;
 165         };
 166
 167
 168         /* Static space */
 169
 170         /**
 171          * Whether this title exists on the wiki.
 172          * @param title {mixed} prefixed db-key name (string) or instance of Title
 173          * @return {mixed} Boolean true/false if the information is available. Otherwise null.
 174          */
 175         Title.exists = function( title ) {
 176                 var type = $.type( title ), obj = Title.exist.pages, match;
 177                 if ( type === 'string' ) {
 178                         match = obj[title];
 179                 } else if ( type === 'object' && title instanceof Title ) {
 180                         match = obj[title.toString()];
 181                 } else {
 182                         throw new Error( 'mw.Title.exists: title must be a string or an instance of Title' );
 183                 }
 184                 if ( typeof match === 'boolean' ) {
 185                         return match;
 186                 }
 187                 return null;
 188         };
 189
 190         /**
 191          * @var Title.exist {Object}
 192          */
 193         Title.exist = {
 194                 /**
 195                  * @var Title.exist.pages {Object} Keyed by PrefixedDb title.
 196                  * Boolean true value indicates page does exist.
 197                  */
 198                 pages: {},
 199                 /**
 200                  * @example Declare existing titles: Title.exist.set(['User:John_Doe', ...]);
 201                  * @example Declare titles nonexistent: Title.exist.set(['File:Foo_bar.jpg', ...], false);
 202                  * @param titles {String|Array} Title(s) in strict prefixedDb title form.
 203                  * @param state {Boolean} (optional) State of the given titles. Defaults to true.
 204                  * @return {Boolean}
 205                  */
 206                 set: function( titles, state ) {
 207                         titles = $.isArray( titles ) ? titles : [titles];
 208                         state = state === undefined ? true : !!state;
 209                         var pages = this.pages, i, len = titles.length;
 210                         for ( i = 0; i < len; i++ ) {
 211                                 pages[ titles[i] ] = state;
 212                         }
 213                         return true;
 214                 }
 215         };
 216
 217         /* Public methods */
 218
 219         var fn = {
 220                 constructor: Title,
 221
 222                 /**
 223                  * Get the namespace number.
 224                  * @return {Number}
 225                  */
 226                 getNamespaceId: function(){
 227                         return this._ns;
 228                 },
 229
 230                 /**
 231                  * Get the namespace prefix (in the content-language).
 232                  * In NS_MAIN this is '', otherwise namespace name plus ':'
 233                  * @return {String}
 234                  */
 235                 getNamespacePrefix: function(){
 236                         return mw.config.get( 'wgFormattedNamespaces' )[this._ns].replace( / /g, '_' ) + (this._ns === 0 ? '' : ':');
 237                 },
 238
 239                 /**
 240                  * The name, like "Foo_bar"
 241                  * @return {String}
 242                  */
 243                 getName: function() {
 244                         if ( $.inArray( this._ns, mw.config.get( 'wgCaseSensitiveNamespaces' ) ) !== -1 ) {
 245                                 return this._name;
 246                         } else {
 247                                 return $.ucFirst( this._name );
 248                         }
 249                 },
 250
 251                 /**
 252                  * The name, like "Foo bar"
 253                  * @return {String}
 254                  */
 255                 getNameText: function() {
 256                         return text( this.getName() );
 257                 },
 258
 259                 /**
 260                  * Get full name in prefixed DB form, like File:Foo_bar.jpg,
 261                  * most useful for API calls, anything that must identify the "title".
 262                  */
 263                 getPrefixedDb: function() {
 264                         return this.getNamespacePrefix() + this.getMain();
 265                 },
 266
 267                 /**
 268                  * Get full name in text form, like "File:Foo bar.jpg".
 269                  * @return {String}
 270                  */
 271                 getPrefixedText: function() {
 272                         return text( this.getPrefixedDb() );
 273                 },
 274
 275                 /**
 276                  * The main title (without namespace), like "Foo_bar.jpg"
 277                  * @return {String}
 278                  */
 279                 getMain: function() {
 280                         return this.getName() + this.getDotExtension();
 281                 },
 282
 283                 /**
 284                  * The "text" form, like "Foo bar.jpg"
 285                  * @return {String}
 286                  */
 287                 getMainText: function() {
 288                         return text( this.getMain() );
 289                 },
 290
 291                 /**
 292                  * Get the extension (returns null if there was none)
 293                  * @return {String|null} extension
 294                  */
 295                 getExtension: function() {
 296                         return this._ext;
 297                 },
 298
 299                 /**
 300                  * Convenience method: return string like ".jpg", or "" if no extension
 301                  * @return {String}
 302                  */
 303                 getDotExtension: function() {
 304                         return this._ext === null ? '' : '.' + this._ext;
 305                 },
 306
 307                 /**
 308                  * Return the URL to this title
 309                  * @return {String}
 310                  */
 311                 getUrl: function() {
 312                         return mw.util.wikiGetlink( this.toString() );
 313                 },
 314
 315                 /**
 316                  * Whether this title exists on the wiki.
 317                  * @return {mixed} Boolean true/false if the information is available. Otherwise null.
 318                  */
 319                 exists: function() {
 320                         return Title.exists( this );
 321                 }
 322         };
 323
 324         // Alias
 325         fn.toString = fn.getPrefixedDb;
 326         fn.toText = fn.getPrefixedText;
 327
 328         // Assign
 329         Title.prototype = fn;
 330
 331         // Expose
 332         mw.Title = Title;
 333
 334 })(jQuery);