includes/resourceloader/ResourceLoaderFileModule.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @author Trevor Parscal
  20  * @author Roan Kattouw
  21  */
  22
  23 /**
  24  * ResourceLoader module based on local JavaScript/CSS files.
  25  */
  26 class ResourceLoaderFileModule extends ResourceLoaderModule {
  27
  28         /* Protected Members */
  29
  30         /** String: Local base path, see __construct() */
  31         protected $localBasePath = '';
  32         /** String: Remote base path, see __construct() */
  33         protected $remoteBasePath = '';
  34         /**
  35          * Array: List of paths to JavaScript files to always include
  36          * @example array( [file-path], [file-path], ... )
  37          */
  38         protected $scripts = array();
  39         /**
  40          * Array: List of JavaScript files to include when using a specific language
  41          * @example array( [language-code] => array( [file-path], [file-path], ... ), ... )
  42          */
  43         protected $languageScripts = array();
  44         /**
  45          * Array: List of JavaScript files to include when using a specific skin
  46          * @example array( [skin-name] => array( [file-path], [file-path], ... ), ... )
  47          */
  48         protected $skinScripts = array();
  49         /**
  50          * Array: List of paths to JavaScript files to include in debug mode
  51          * @example array( [skin-name] => array( [file-path], [file-path], ... ), ... )
  52          */
  53         protected $debugScripts = array();
  54         /**
  55          * Array: List of paths to JavaScript files to include in the startup module
  56          * @example array( [file-path], [file-path], ... )
  57          */
  58         protected $loaderScripts = array();
  59         /**
  60          * Array: List of paths to CSS files to always include
  61          * @example array( [file-path], [file-path], ... )
  62          */
  63         protected $styles = array();
  64         /**
  65          * Array: List of paths to CSS files to include when using specific skins
  66          * @example array( [file-path], [file-path], ... )
  67          */
  68         protected $skinStyles = array();
  69         /**
  70          * Array: List of modules this module depends on
  71          * @example array( [file-path], [file-path], ... )
  72          */
  73         protected $dependencies = array();
  74         /**
  75          * Array: List of message keys used by this module
  76          * @example array( [message-key], [message-key], ... )
  77          */
  78         protected $messages = array();
  79         /** String: Name of group to load this module in */
  80         protected $group;
  81         /** Boolean: Link to raw files in debug mode */
  82         protected $debugRaw = true;
  83         /**
  84          * Array: Cache for mtime
  85          * @example array( [hash] => [mtime], [hash] => [mtime], ... )
  86          */
  87         protected $modifiedTime = array();
  88         /**
  89          * Array: Place where readStyleFile() tracks file dependencies
  90          * @example array( [file-path], [file-path], ... )
  91          */
  92         protected $localFileRefs = array();
  93
  94         /* Methods */
  95
  96         /**
  97          * Constructs a new module from an options array.
  98          *
  99          * @param $options Array: List of options; if not given or empty, an empty module will be
 100          *     constructed
 101          * @param $localBasePath String: Base path to prepend to all local paths in $options. Defaults
 102          *     to $IP
 103          * @param $remoteBasePath String: Base path to prepend to all remote paths in $options. Defaults
 104          *     to $wgScriptPath
 105          *
 106          * @example $options
 107          *      array(
 108          *              // Base path to prepend to all local paths in $options. Defaults to $IP
 109          *              'localBasePath' => [base path],
 110          *              // Base path to prepend to all remote paths in $options. Defaults to $wgScriptPath
 111          *              'remoteBasePath' => [base path],
 112          *              // Equivalent of remoteBasePath, but relative to $wgExtensionAssetsPath
 113          *              'remoteExtPath' => [base path],
 114          *              // Scripts to always include
 115          *              'scripts' => [file path string or array of file path strings],
 116          *              // Scripts to include in specific language contexts
 117          *              'languageScripts' => array(
 118          *                      [language code] => [file path string or array of file path strings],
 119          *              ),
 120          *              // Scripts to include in specific skin contexts
 121          *              'skinScripts' => array(
 122          *                      [skin name] => [file path string or array of file path strings],
 123          *              ),
 124          *              // Scripts to include in debug contexts
 125          *              'debugScripts' => [file path string or array of file path strings],
 126          *              // Scripts to include in the startup module
 127          *              'loaderScripts' => [file path string or array of file path strings],
 128          *              // Modules which must be loaded before this module
 129          *              'dependencies' => [modile name string or array of module name strings],
 130          *              // Styles to always load
 131          *              'styles' => [file path string or array of file path strings],
 132          *              // Styles to include in specific skin contexts
 133          *              'skinStyles' => array(
 134          *                      [skin name] => [file path string or array of file path strings],
 135          *              ),
 136          *              // Messages to always load
 137          *              'messages' => [array of message key strings],
 138          *              // Group which this module should be loaded together with
 139          *              'group' => [group name string],
 140          *      )
 141          */
 142         public function __construct( $options = array(), $localBasePath = null,
 143                 $remoteBasePath = null )
 144         {
 145                 global $IP, $wgScriptPath;
 146                 $this->localBasePath = $localBasePath === null ? $IP : $localBasePath;
 147                 $this->remoteBasePath = $remoteBasePath === null ? $wgScriptPath : $remoteBasePath;
 148
 149                 if ( isset( $options['remoteExtPath'] ) ) {
 150                         global $wgExtensionAssetsPath;
 151                         $this->remoteBasePath = $wgExtensionAssetsPath . '/' . $options['remoteExtPath'];
 152                 }
 153
 154                 foreach ( $options as $member => $option ) {
 155                         switch ( $member ) {
 156                                 // Lists of file paths
 157                                 case 'scripts':
 158                                 case 'debugScripts':
 159                                 case 'loaderScripts':
 160                                 case 'styles':
 161                                         $this->{$member} = (array) $option;
 162                                         break;
 163                                 // Collated lists of file paths
 164                                 case 'languageScripts':
 165                                 case 'skinScripts':
 166                                 case 'skinStyles':
 167                                         if ( !is_array( $option ) ) {
 168                                                 throw new MWException(
 169                                                         "Invalid collated file path list error. " .
 170                                                         "'$option' given, array expected."
 171                                                 );
 172                                         }
 173                                         foreach ( $option as $key => $value ) {
 174                                                 if ( !is_string( $key ) ) {
 175                                                         throw new MWException(
 176                                                                 "Invalid collated file path list key error. " .
 177                                                                 "'$key' given, string expected."
 178                                                         );
 179                                                 }
 180                                                 $this->{$member}[$key] = (array) $value;
 181                                         }
 182                                         break;
 183                                 // Lists of strings
 184                                 case 'dependencies':
 185                                 case 'messages':
 186                                         $this->{$member} = (array) $option;
 187                                         break;
 188                                 // Single strings
 189                                 case 'group':
 190                                 case 'localBasePath':
 191                                 case 'remoteBasePath':
 192                                         $this->{$member} = (string) $option;
 193                                         break;
 194                                 // Single booleans
 195                                 case 'debugRaw':
 196                                         $this->{$member} = (bool) $option;
 197                                         break;
 198                         }
 199                 }
 200         }
 201
 202         /**
 203          * Gets all scripts for a given context concatenated together.
 204          *
 205          * @param $context ResourceLoaderContext: Context in which to generate script
 206          * @return String: JavaScript code for $context
 207          */
 208         public function getScript( ResourceLoaderContext $context ) {
 209                 $files = array_merge(
 210                         $this->scripts,
 211                         self::tryForKey( $this->languageScripts, $context->getLanguage() ),
 212                         self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' )
 213                 );
 214                 if ( $context->getDebug() ) {
 215                         $files = array_merge( $files, $this->debugScripts );
 216                         if ( $this->debugRaw ) {
 217                                 $script = '';
 218                                 foreach ( $files as $file ) {
 219                                         $path = $this->getRemotePath( $file );
 220                                         $script .= "\n\t" . Xml::encodeJsCall( 'mediaWiki.loader.load', array( $path ) );
 221                                 }
 222                                 return $script;
 223                         }
 224                 }
 225                 return $this->readScriptFiles( $files );
 226         }
 227
 228         /**
 229          * Gets loader script.
 230          *
 231          * @return String: JavaScript code to be added to startup module
 232          */
 233         public function getLoaderScript() {
 234                 if ( count( $this->loaderScripts ) == 0 ) {
 235                         return false;
 236                 }
 237                 return $this->readScriptFiles( $this->loaderScripts );
 238         }
 239
 240         /**
 241          * Gets all styles for a given context concatenated together.
 242          *
 243          * @param $context ResourceLoaderContext: Context in which to generate styles
 244          * @return String: CSS code for $context
 245          */
 246         public function getStyles( ResourceLoaderContext $context ) {
 247                 // Merge general styles and skin specific styles, retaining media type collation
 248                 $styles = $this->readStyleFiles( $this->styles, $this->getFlip( $context ) );
 249                 $skinStyles = $this->readStyleFiles(
 250                         self::tryForKey( $this->skinStyles, $context->getSkin(), 'default' ),
 251                         $this->getFlip( $context )
 252                 );
 253
 254                 foreach ( $skinStyles as $media => $style ) {
 255                         if ( isset( $styles[$media] ) ) {
 256                                 $styles[$media] .= $style;
 257                         } else {
 258                                 $styles[$media] = $style;
 259                         }
 260                 }
 261                 // Collect referenced files
 262                 $this->localFileRefs = array_unique( $this->localFileRefs );
 263                 // If the list has been modified since last time we cached it, update the cache
 264                 if ( $this->localFileRefs !== $this->getFileDependencies( $context->getSkin() ) ) {
 265                         $dbw = wfGetDB( DB_MASTER );
 266                         $dbw->replace( 'module_deps',
 267                                 array( array( 'md_module', 'md_skin' ) ), array(
 268                                         'md_module' => $this->getName(),
 269                                         'md_skin' => $context->getSkin(),
 270                                         'md_deps' => FormatJson::encode( $this->localFileRefs ),
 271                                 )
 272                         );
 273                 }
 274                 return $styles;
 275         }
 276
 277         /**
 278          * Gets list of message keys used by this module.
 279          *
 280          * @return Array: List of message keys
 281          */
 282         public function getMessages() {
 283                 return $this->messages;
 284         }
 285
 286         /**
 287          * Gets the name of the group this module should be loaded in.
 288          *
 289          * @return String: Group name
 290          */
 291         public function getGroup() {
 292                 return $this->group;
 293         }
 294
 295         /**
 296          * Gets list of names of modules this module depends on.
 297          *
 298          * @return Array: List of module names
 299          */
 300         public function getDependencies() {
 301                 return $this->dependencies;
 302         }
 303
 304         /**
 305          * Get the last modified timestamp of this module.
 306          *
 307          * Last modified timestamps are calculated from the highest last modified
 308          * timestamp of this module's constituent files as well as the files it
 309          * depends on. This function is context-sensitive, only performing
 310          * calculations on files relevant to the given language, skin and debug
 311          * mode.
 312          *
 313          * @param $context ResourceLoaderContext: Context in which to calculate
 314          *     the modified time
 315          * @return Integer: UNIX timestamp
 316          * @see ResourceLoaderModule::getFileDependencies
 317          */
 318         public function getModifiedTime( ResourceLoaderContext $context ) {
 319                 if ( isset( $this->modifiedTime[$context->getHash()] ) ) {
 320                         return $this->modifiedTime[$context->getHash()];
 321                 }
 322                 wfProfileIn( __METHOD__ );
 323
 324                 $files = array();
 325
 326                 // Flatten style files into $files
 327                 $styles = self::collateFilePathListByOption( $this->styles, 'media', 'all' );
 328                 foreach ( $styles as $styleFiles ) {
 329                         $files = array_merge( $files, $styleFiles );
 330                 }
 331                 $skinFiles = self::tryForKey(
 332                         self::collateFilePathListByOption( $this->skinStyles, 'media', 'all' ),
 333                         $context->getSkin(),
 334                         'default'
 335                 );
 336                 foreach ( $skinFiles as $styleFiles ) {
 337                         $files = array_merge( $files, $styleFiles );
 338                 }
 339
 340                 // Final merge, this should result in a master list of dependent files
 341                 $files = array_merge(
 342                         $files,
 343                         $this->scripts,
 344                         $context->getDebug() ? $this->debugScripts : array(),
 345                         self::tryForKey( $this->languageScripts, $context->getLanguage() ),
 346                         self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' ),
 347                         $this->loaderScripts
 348                 );
 349                 $files = array_map( array( $this, 'getLocalPath' ), $files );
 350                 // File deps need to be treated separately because they're already prefixed
 351                 $files = array_merge( $files, $this->getFileDependencies( $context->getSkin() ) );
 352
 353                 // If a module is nothing but a list of dependencies, we need to avoid
 354                 // giving max() an empty array
 355                 if ( count( $files ) === 0 ) {
 356                         return $this->modifiedTime[$context->getHash()] = 1;
 357                 }
 358
 359                 wfProfileIn( __METHOD__.'-filemtime' );
 360                 $filesMtime = max( array_map( 'filemtime', $files ) );
 361                 wfProfileOut( __METHOD__.'-filemtime' );
 362                 $this->modifiedTime[$context->getHash()] = max(
 363                         $filesMtime,
 364                         $this->getMsgBlobMtime( $context->getLanguage() ) );
 365                 wfProfileOut( __METHOD__ );
 366                 return $this->modifiedTime[$context->getHash()];
 367         }
 368
 369         /* Protected Members */
 370
 371         protected function getLocalPath( $path ) {
 372                 return "{$this->localBasePath}/$path";
 373         }
 374
 375         protected function getRemotePath( $path ) {
 376                 return "{$this->remoteBasePath}/$path";
 377         }
 378
 379         /**
 380          * Collates file paths by option (where provided).
 381          *
 382          * @param $list Array: List of file paths in any combination of index/path
 383          *     or path/options pairs
 384          * @param $option String: option name
 385          * @param $default Mixed: default value if the option isn't set
 386          * @return Array: List of file paths, collated by $option
 387          */
 388         protected static function collateFilePathListByOption( array $list, $option, $default ) {
 389                 $collatedFiles = array();
 390                 foreach ( (array) $list as $key => $value ) {
 391                         if ( is_int( $key ) ) {
 392                                 // File name as the value
 393                                 if ( !isset( $collatedFiles[$default] ) ) {
 394                                         $collatedFiles[$default] = array();
 395                                 }
 396                                 $collatedFiles[$default][] = $value;
 397                         } else if ( is_array( $value ) ) {
 398                                 // File name as the key, options array as the value
 399                                 $optionValue = isset( $value[$option] ) ? $value[$option] : $default;
 400                                 if ( !isset( $collatedFiles[$optionValue] ) ) {
 401                                         $collatedFiles[$optionValue] = array();
 402                                 }
 403                                 $collatedFiles[$optionValue][] = $key;
 404                         }
 405                 }
 406                 return $collatedFiles;
 407         }
 408
 409         /**
 410          * Gets a list of element that match a key, optionally using a fallback key.
 411          *
 412          * @param $list Array: List of lists to select from
 413          * @param $key String: Key to look for in $map
 414          * @param $fallback String: Key to look for in $list if $key doesn't exist
 415          * @return Array: List of elements from $map which matched $key or $fallback,
 416          *     or an empty list in case of no match
 417          */
 418         protected static function tryForKey( array $list, $key, $fallback = null ) {
 419                 if ( isset( $list[$key] ) && is_array( $list[$key] ) ) {
 420                         return $list[$key];
 421                 } else if ( is_string( $fallback )
 422                         && isset( $list[$fallback] )
 423                         && is_array( $list[$fallback] ) )
 424                 {
 425                         return $list[$fallback];
 426                 }
 427                 return array();
 428         }
 429
 430         /**
 431          * Gets the contents of a list of JavaScript files.
 432          *
 433          * @param $scripts Array: List of file paths to scripts to read, remap and concetenate
 434          * @return String: Concatenated and remapped JavaScript data from $scripts
 435          */
 436         protected function readScriptFiles( array $scripts ) {
 437                 if ( empty( $scripts ) ) {
 438                         return '';
 439                 }
 440                 $js = '';
 441                 foreach ( array_unique( $scripts ) as $fileName ) {
 442                         $localPath = $this->getLocalPath( $fileName );
 443                         $contents = file_get_contents( $localPath );
 444                         if ( $contents === false ) {
 445                                 throw new MWException( __METHOD__.": script file not found: \"$localPath\"" );
 446                         }
 447                         $js .= $contents . "\n";
 448                 }
 449                 return $js;
 450         }
 451
 452         /**
 453          * Gets the contents of a list of CSS files.
 454          *
 455          * @param $styles Array: List of file paths to styles to read, remap and concetenate
 456          * @return Array: List of concatenated and remapped CSS data from $styles,
 457          *     keyed by media type
 458          */
 459         protected function readStyleFiles( array $styles, $flip ) {
 460                 if ( empty( $styles ) ) {
 461                         return array();
 462                 }
 463                 $styles = self::collateFilePathListByOption( $styles, 'media', 'all' );
 464                 foreach ( $styles as $media => $files ) {
 465                         $uniqueFiles = array_unique( $files );
 466                         $styles[$media] = implode(
 467                                 "\n",
 468                                 array_map(
 469                                         array( $this, 'readStyleFile' ),
 470                                         $uniqueFiles,
 471                                         array_fill( 0, count( $uniqueFiles ), $flip )
 472                                 )
 473                         );
 474                 }
 475                 return $styles;
 476         }
 477
 478         /**
 479          * Reads a style file.
 480          *
 481          * This method can be used as a callback for array_map()
 482          *
 483          * @param $path String: File path of script file to read
 484          * @return String: CSS data in script file
 485          */
 486         protected function readStyleFile( $path, $flip ) {
 487                 $localPath = $this->getLocalPath( $path );
 488                 $style = file_get_contents( $localPath );
 489                 if ( $style === false ) {
 490                         throw new MWException( __METHOD__.": style file not found: \"$localPath\"" );
 491                 }
 492                 if ( $flip ) {
 493                         $style = CSSJanus::transform( $style, true, false );
 494                 }
 495                 $dirname = dirname( $path );
 496                 if ( $dirname == '.' ) {
 497                         // If $path doesn't have a directory component, don't prepend a dot
 498                         $dirname = '';
 499                 }
 500                 $dir = $this->getLocalPath( $dirname );
 501                 $remoteDir = $this->getRemotePath( $dirname );
 502                 // Get and register local file references
 503                 $this->localFileRefs = array_merge(
 504                         $this->localFileRefs,
 505                         CSSMin::getLocalFileReferences( $style, $dir ) );
 506                 return CSSMin::remap(
 507                         $style, $dir, $remoteDir, true
 508                 );
 509         }
 510 }