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                 global $wgServer;
 210
 211                 $files = array_merge(
 212                         $this->scripts,
 213                         self::tryForKey( $this->languageScripts, $context->getLanguage() ),
 214                         self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' )
 215                 );
 216                 if ( $context->getDebug() ) {
 217                         $files = array_merge( $files, $this->debugScripts );
 218                         if ( $this->debugRaw ) {
 219                                 $script = '';
 220                                 foreach ( $files as $file ) {
 221                                         $path = $wgServer . $this->getRemotePath( $file );
 222                                         $script .= "\n\t" . Xml::encodeJsCall( 'mediaWiki.loader.load', array( $path ) );
 223                                 }
 224                                 return $script;
 225                         }
 226                 }
 227                 return $this->readScriptFiles( $files );
 228         }
 229
 230         /**
 231          * Gets loader script.
 232          *
 233          * @return String: JavaScript code to be added to startup module
 234          */
 235         public function getLoaderScript() {
 236                 if ( count( $this->loaderScripts ) == 0 ) {
 237                         return false;
 238                 }
 239                 return $this->readScriptFiles( $this->loaderScripts );
 240         }
 241
 242         /**
 243          * Gets all styles for a given context concatenated together.
 244          *
 245          * @param $context ResourceLoaderContext: Context in which to generate styles
 246          * @return String: CSS code for $context
 247          */
 248         public function getStyles( ResourceLoaderContext $context ) {
 249                 // Merge general styles and skin specific styles, retaining media type collation
 250                 $styles = $this->readStyleFiles( $this->styles, $this->getFlip( $context ) );
 251                 $skinStyles = $this->readStyleFiles(
 252                         self::tryForKey( $this->skinStyles, $context->getSkin(), 'default' ),
 253                         $this->getFlip( $context )
 254                 );
 255
 256                 foreach ( $skinStyles as $media => $style ) {
 257                         if ( isset( $styles[$media] ) ) {
 258                                 $styles[$media] .= $style;
 259                         } else {
 260                                 $styles[$media] = $style;
 261                         }
 262                 }
 263                 // Collect referenced files
 264                 $this->localFileRefs = array_unique( $this->localFileRefs );
 265                 // If the list has been modified since last time we cached it, update the cache
 266                 if ( $this->localFileRefs !== $this->getFileDependencies( $context->getSkin() ) ) {
 267                         $dbw = wfGetDB( DB_MASTER );
 268                         $dbw->replace( 'module_deps',
 269                                 array( array( 'md_module', 'md_skin' ) ), array(
 270                                         'md_module' => $this->getName(),
 271                                         'md_skin' => $context->getSkin(),
 272                                         'md_deps' => FormatJson::encode( $this->localFileRefs ),
 273                                 )
 274                         );
 275                 }
 276                 return $styles;
 277         }
 278
 279         /**
 280          * Gets list of message keys used by this module.
 281          *
 282          * @return Array: List of message keys
 283          */
 284         public function getMessages() {
 285                 return $this->messages;
 286         }
 287
 288         /**
 289          * Gets the name of the group this module should be loaded in.
 290          *
 291          * @return String: Group name
 292          */
 293         public function getGroup() {
 294                 return $this->group;
 295         }
 296
 297         /**
 298          * Gets list of names of modules this module depends on.
 299          *
 300          * @return Array: List of module names
 301          */
 302         public function getDependencies() {
 303                 return $this->dependencies;
 304         }
 305
 306         /**
 307          * Get the last modified timestamp of this module.
 308          *
 309          * Last modified timestamps are calculated from the highest last modified
 310          * timestamp of this module's constituent files as well as the files it
 311          * depends on. This function is context-sensitive, only performing
 312          * calculations on files relevant to the given language, skin and debug
 313          * mode.
 314          *
 315          * @param $context ResourceLoaderContext: Context in which to calculate
 316          *     the modified time
 317          * @return Integer: UNIX timestamp
 318          * @see ResourceLoaderModule::getFileDependencies
 319          */
 320         public function getModifiedTime( ResourceLoaderContext $context ) {
 321                 if ( isset( $this->modifiedTime[$context->getHash()] ) ) {
 322                         return $this->modifiedTime[$context->getHash()];
 323                 }
 324                 wfProfileIn( __METHOD__ );
 325
 326                 $files = array();
 327
 328                 // Flatten style files into $files
 329                 $styles = self::collateFilePathListByOption( $this->styles, 'media', 'all' );
 330                 foreach ( $styles as $styleFiles ) {
 331                         $files = array_merge( $files, $styleFiles );
 332                 }
 333                 $skinFiles = self::tryForKey(
 334                         self::collateFilePathListByOption( $this->skinStyles, 'media', 'all' ),
 335                         $context->getSkin(),
 336                         'default'
 337                 );
 338                 foreach ( $skinFiles as $styleFiles ) {
 339                         $files = array_merge( $files, $styleFiles );
 340                 }
 341
 342                 // Final merge, this should result in a master list of dependent files
 343                 $files = array_merge(
 344                         $files,
 345                         $this->scripts,
 346                         $context->getDebug() ? $this->debugScripts : array(),
 347                         self::tryForKey( $this->languageScripts, $context->getLanguage() ),
 348                         self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' ),
 349                         $this->loaderScripts
 350                 );
 351                 $files = array_map( array( $this, 'getLocalPath' ), $files );
 352                 // File deps need to be treated separately because they're already prefixed
 353                 $files = array_merge( $files, $this->getFileDependencies( $context->getSkin() ) );
 354
 355                 // If a module is nothing but a list of dependencies, we need to avoid
 356                 // giving max() an empty array
 357                 if ( count( $files ) === 0 ) {
 358                         return $this->modifiedTime[$context->getHash()] = 1;
 359                 }
 360
 361                 wfProfileIn( __METHOD__.'-filemtime' );
 362                 $filesMtime = max( array_map( 'filemtime', $files ) );
 363                 wfProfileOut( __METHOD__.'-filemtime' );
 364                 $this->modifiedTime[$context->getHash()] = max(
 365                         $filesMtime,
 366                         $this->getMsgBlobMtime( $context->getLanguage() ) );
 367                 wfProfileOut( __METHOD__ );
 368                 return $this->modifiedTime[$context->getHash()];
 369         }
 370
 371         /* Protected Members */
 372
 373         protected function getLocalPath( $path ) {
 374                 return "{$this->localBasePath}/$path";
 375         }
 376
 377         protected function getRemotePath( $path ) {
 378                 return "{$this->remoteBasePath}/$path";
 379         }
 380
 381         /**
 382          * Collates file paths by option (where provided).
 383          *
 384          * @param $list Array: List of file paths in any combination of index/path
 385          *     or path/options pairs
 386          * @param $option String: option name
 387          * @param $default Mixed: default value if the option isn't set
 388          * @return Array: List of file paths, collated by $option
 389          */
 390         protected static function collateFilePathListByOption( array $list, $option, $default ) {
 391                 $collatedFiles = array();
 392                 foreach ( (array) $list as $key => $value ) {
 393                         if ( is_int( $key ) ) {
 394                                 // File name as the value
 395                                 if ( !isset( $collatedFiles[$default] ) ) {
 396                                         $collatedFiles[$default] = array();
 397                                 }
 398                                 $collatedFiles[$default][] = $value;
 399                         } else if ( is_array( $value ) ) {
 400                                 // File name as the key, options array as the value
 401                                 $optionValue = isset( $value[$option] ) ? $value[$option] : $default;
 402                                 if ( !isset( $collatedFiles[$optionValue] ) ) {
 403                                         $collatedFiles[$optionValue] = array();
 404                                 }
 405                                 $collatedFiles[$optionValue][] = $key;
 406                         }
 407                 }
 408                 return $collatedFiles;
 409         }
 410
 411         /**
 412          * Gets a list of element that match a key, optionally using a fallback key.
 413          *
 414          * @param $list Array: List of lists to select from
 415          * @param $key String: Key to look for in $map
 416          * @param $fallback String: Key to look for in $list if $key doesn't exist
 417          * @return Array: List of elements from $map which matched $key or $fallback,
 418          *     or an empty list in case of no match
 419          */
 420         protected static function tryForKey( array $list, $key, $fallback = null ) {
 421                 if ( isset( $list[$key] ) && is_array( $list[$key] ) ) {
 422                         return $list[$key];
 423                 } else if ( is_string( $fallback )
 424                         && isset( $list[$fallback] )
 425                         && is_array( $list[$fallback] ) )
 426                 {
 427                         return $list[$fallback];
 428                 }
 429                 return array();
 430         }
 431
 432         /**
 433          * Gets the contents of a list of JavaScript files.
 434          *
 435          * @param $scripts Array: List of file paths to scripts to read, remap and concetenate
 436          * @return String: Concatenated and remapped JavaScript data from $scripts
 437          */
 438         protected function readScriptFiles( array $scripts ) {
 439                 if ( empty( $scripts ) ) {
 440                         return '';
 441                 }
 442                 $js = '';
 443                 foreach ( array_unique( $scripts ) as $fileName ) {
 444                         $localPath = $this->getLocalPath( $fileName );
 445                         $contents = file_get_contents( $localPath );
 446                         if ( $contents === false ) {
 447                                 throw new MWException( __METHOD__.": script file not found: \"$localPath\"" );
 448                         }
 449                         $js .= $contents . "\n";
 450                 }
 451                 return $js;
 452         }
 453
 454         /**
 455          * Gets the contents of a list of CSS files.
 456          *
 457          * @param $styles Array: List of file paths to styles to read, remap and concetenate
 458          * @return Array: List of concatenated and remapped CSS data from $styles,
 459          *     keyed by media type
 460          */
 461         protected function readStyleFiles( array $styles, $flip ) {
 462                 if ( empty( $styles ) ) {
 463                         return array();
 464                 }
 465                 $styles = self::collateFilePathListByOption( $styles, 'media', 'all' );
 466                 foreach ( $styles as $media => $files ) {
 467                         $styles[$media] = implode(
 468                                 "\n",
 469                                 array_map(
 470                                         array( $this, 'readStyleFile' ),
 471                                         array_unique( $files ),
 472                                         array( $flip )
 473                                 )
 474                         );
 475                 }
 476                 return $styles;
 477         }
 478
 479         /**
 480          * Reads a style file.
 481          *
 482          * This method can be used as a callback for array_map()
 483          *
 484          * @param $path String: File path of script file to read
 485          * @return String: CSS data in script file
 486          */
 487         protected function readStyleFile( $path, $flip ) {
 488                 $localPath = $this->getLocalPath( $path );
 489                 $style = file_get_contents( $localPath );
 490                 if ( $style === false ) {
 491                         throw new MWException( __METHOD__.": style file not found: \"$localPath\"" );
 492                 }
 493                 if ( $flip ) {
 494                         $style = CSSJanus::transform( $style, true, false );
 495                 }
 496                 $dir = $this->getLocalPath( dirname( $path ) );
 497                 $remoteDir = $this->getRemotePath( dirname( $path ) );
 498                 // Get and register local file references
 499                 $this->localFileRefs = array_merge(
 500                         $this->localFileRefs,
 501                         CSSMin::getLocalFileReferences( $style, $dir ) );
 502                 return CSSMin::remap(
 503                         $style, $dir, $remoteDir, true
 504                 );
 505         }
 506 }