includes/parser/ParserOutput.php

   1 <?php
   2 /**
   3  * Output of the PHP parser
   4  *
   5  * @file
   6  * @ingroup Parser
   7  */
   8
   9 /**
  10  * @todo document
  11  * @ingroup Parser
  12  */
  13
  14 class CacheTime {
  15         var     $mVersion = Parser::VERSION,  # Compatibility check
  16                 $mCacheTime = '',             # Time when this object was generated, or -1 for uncacheable. Used in ParserCache.
  17                 $mCacheExpiry = null,         # Seconds after which the object should expire, use 0 for uncachable. Used in ParserCache.
  18                 $mContainsOldMagic;           # Boolean variable indicating if the input contained variables like {{CURRENTDAY}}
  19
  20         function getCacheTime()              { return $this->mCacheTime; }
  21
  22         function containsOldMagic()          { return $this->mContainsOldMagic; }
  23         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
  24
  25         /**
  26          * setCacheTime() sets the timestamp expressing when the page has been rendered.
  27          * This doesn not control expiry, see updateCacheExpiry() for that!
  28          * @param $t string
  29          * @return string
  30          */
  31         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
  32
  33         /**
  34          * Sets the number of seconds after which this object should expire.
  35          * This value is used with the ParserCache.
  36          * If called with a value greater than the value provided at any previous call,
  37          * the new call has no effect. The value returned by getCacheExpiry is smaller
  38          * or equal to the smallest number that was provided as an argument to
  39          * updateCacheExpiry().
  40          *
  41          * @param $seconds number
  42          */
  43         function updateCacheExpiry( $seconds ) {
  44                 $seconds = (int)$seconds;
  45
  46                 if ( $this->mCacheExpiry === null || $this->mCacheExpiry > $seconds ) {
  47                         $this->mCacheExpiry = $seconds;
  48                 }
  49
  50                 // hack: set old-style marker for uncacheable entries.
  51                 if ( $this->mCacheExpiry !== null && $this->mCacheExpiry <= 0 ) {
  52                         $this->mCacheTime = -1;
  53                 }
  54         }
  55
  56         /**
  57          * Returns the number of seconds after which this object should expire.
  58          * This method is used by ParserCache to determine how long the ParserOutput can be cached.
  59          * The timestamp of expiry can be calculated by adding getCacheExpiry() to getCacheTime().
  60          * The value returned by getCacheExpiry is smaller or equal to the smallest number
  61          * that was provided to a call of updateCacheExpiry(), and smaller or equal to the
  62          * value of $wgParserCacheExpireTime.
  63          */
  64         function getCacheExpiry() {
  65                 global $wgParserCacheExpireTime;
  66
  67                 if ( $this->mCacheTime < 0 ) {
  68                         return 0;
  69                 } // old-style marker for "not cachable"
  70
  71                 $expire = $this->mCacheExpiry;
  72
  73                 if ( $expire === null ) {
  74                         $expire = $wgParserCacheExpireTime;
  75                 } else {
  76                         $expire = min( $expire, $wgParserCacheExpireTime );
  77                 }
  78
  79                 if( $this->containsOldMagic() ) { //compatibility hack
  80                         $expire = min( $expire, 3600 ); # 1 hour
  81                 }
  82
  83                 if ( $expire <= 0 ) {
  84                         return 0; // not cachable
  85                 } else {
  86                         return $expire;
  87                 }
  88         }
  89
  90         /**
  91          * @return bool
  92          */
  93         function isCacheable() {
  94                 return $this->getCacheExpiry() > 0;
  95         }
  96
  97         /**
  98          * Return true if this cached output object predates the global or
  99          * per-article cache invalidation timestamps, or if it comes from
 100          * an incompatible older version.
 101          *
 102          * @param $touched String: the affected article's last touched timestamp
 103          * @return Boolean
 104          */
 105         public function expired( $touched ) {
 106                 global $wgCacheEpoch;
 107                 return !$this->isCacheable() || // parser says it's uncacheable
 108                            $this->getCacheTime() < $touched ||
 109                            $this->getCacheTime() <= $wgCacheEpoch ||
 110                            $this->getCacheTime() < wfTimestamp( TS_MW, time() - $this->getCacheExpiry() ) || // expiry period has passed
 111                            !isset( $this->mVersion ) ||
 112                            version_compare( $this->mVersion, Parser::VERSION, "lt" );
 113         }
 114 }
 115
 116 class ParserOutput extends CacheTime {
 117         var $mText,                       # The output text
 118                 $mLanguageLinks,              # List of the full text of language links, in the order they appear
 119                 $mCategories,                 # Map of category names to sort keys
 120                 $mTitleText,                  # title text of the chosen language variant
 121                 $mLinks = array(),            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
 122                 $mTemplates = array(),        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
 123                 $mTemplateIds = array(),      # 2-D map of NS/DBK to rev ID for the template references. ID=zero for broken.
 124                 $mImages = array(),           # DB keys of the images used, in the array key only
 125                 $mFileSearchOptions = array(), # DB keys of the images used mapped to sha1 and MW timestamp
 126                 $mExternalLinks = array(),    # External link URLs, in the key only
 127                 $mInterwikiLinks = array(),   # 2-D map of prefix/DBK (in keys only) for the inline interwiki links in the document.
 128                 $mNewSection = false,         # Show a new section link?
 129                 $mHideNewSection = false,     # Hide the new section link?
 130                 $mNoGallery = false,          # No gallery on category page? (__NOGALLERY__)
 131                 $mHeadItems = array(),        # Items to put in the <head> section
 132                 $mModules = array(),          # Modules to be loaded by the resource loader
 133                 $mModuleScripts = array(),    # Modules of which only the JS will be loaded by the resource loader
 134                 $mModuleStyles = array(),     # Modules of which only the CSSS will be loaded by the resource loader
 135                 $mModuleMessages = array(),   # Modules of which only the messages will be loaded by the resource loader
 136                 $mOutputHooks = array(),      # Hook tags as per $wgParserOutputHooks
 137                 $mWarnings = array(),         # Warning text to be returned to the user. Wikitext formatted, in the key only
 138                 $mSections = array(),         # Table of contents
 139                 $mEditSectionTokens = false,  # prefix/suffix markers if edit sections were output as tokens
 140                 $mProperties = array(),       # Name/value pairs to be cached in the DB
 141                 $mTOCHTML = '',               # HTML of the TOC
 142                 $mTimestamp;                  # Timestamp of the revision
 143         private $mIndexPolicy = '';       # 'index' or 'noindex'?  Any other value will result in no change.
 144         private $mAccessedOptions = array(); # List of ParserOptions (stored in the keys)
 145
 146         const EDITSECTION_REGEX = '#<(?:mw:)?editsection page="(.*?)" section="(.*?)"(?:/>|>(.*?)(</(?:mw:)?editsection>))#';
 147
 148         function __construct( $text = '', $languageLinks = array(), $categoryLinks = array(),
 149                 $containsOldMagic = false, $titletext = '' )
 150         {
 151                 $this->mText = $text;
 152                 $this->mLanguageLinks = $languageLinks;
 153                 $this->mCategories = $categoryLinks;
 154                 $this->mContainsOldMagic = $containsOldMagic;
 155                 $this->mTitleText = $titletext;
 156         }
 157
 158         function getText() {
 159                 if ( $this->mEditSectionTokens ) {
 160                         return preg_replace_callback( ParserOutput::EDITSECTION_REGEX,
 161                                 array( &$this, 'replaceEditSectionLinksCallback' ), $this->mText );
 162                 }
 163                 return preg_replace( ParserOutput::EDITSECTION_REGEX, '', $this->mText );
 164         }
 165
 166         /**
 167          * callback used by getText to replace editsection tokens
 168          * @private
 169          */
 170         function replaceEditSectionLinksCallback( $m ) {
 171                 global $wgOut, $wgLang;
 172                 $args = array(
 173                         htmlspecialchars_decode($m[1]),
 174                         htmlspecialchars_decode($m[2]),
 175                         isset($m[4]) ? $m[3] : null,
 176                 );
 177                 $args[0] = Title::newFromText( $args[0] );
 178                 if ( !is_object($args[0]) ) {
 179                         throw new MWException("Bad parser output text.");
 180                 }
 181                 $args[] = $wgLang->getCode();
 182                 $skin = $wgOut->getSkin();
 183                 return call_user_func_array( array( $skin, 'doEditSectionLink' ), $args );
 184         }
 185
 186         function &getLanguageLinks()         { return $this->mLanguageLinks; }
 187         function getInterwikiLinks()         { return $this->mInterwikiLinks; }
 188         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
 189         function &getCategories()            { return $this->mCategories; }
 190         function getTitleText()              { return $this->mTitleText; }
 191         function getSections()               { return $this->mSections; }
 192         function getEditSectionTokens()      { return $this->mEditSectionTokens; }
 193         function &getLinks()                 { return $this->mLinks; }
 194         function &getTemplates()             { return $this->mTemplates; }
 195         function &getTemplateIds()           { return $this->mTemplateIds; }
 196         function &getImages()                { return $this->mImages; }
 197         function &getFileSearchOptions()     { return $this->mFileSearchOptions; }
 198         function &getExternalLinks()         { return $this->mExternalLinks; }
 199         function getNoGallery()              { return $this->mNoGallery; }
 200         function getHeadItems()              { return $this->mHeadItems; }
 201         function getModules()                { return $this->mModules; }
 202         function getModuleScripts()          { return $this->mModuleScripts; }
 203         function getModuleStyles()           { return $this->mModuleStyles; }
 204         function getModuleMessages()         { return $this->mModuleMessages; }
 205         function getOutputHooks()            { return (array)$this->mOutputHooks; }
 206         function getWarnings()               { return array_keys( $this->mWarnings ); }
 207         function getIndexPolicy()            { return $this->mIndexPolicy; }
 208         function getTOCHTML()                { return $this->mTOCHTML; }
 209         function getTimestamp()              { return $this->mTimestamp; }
 210
 211         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
 212         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
 213         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
 214
 215         function setTitleText( $t )          { return wfSetVar( $this->mTitleText, $t ); }
 216         function setSections( $toc )         { return wfSetVar( $this->mSections, $toc ); }
 217         function setEditSectionTokens( $t )  { return wfSetVar( $this->mEditSectionTokens, $t ); }
 218         function setIndexPolicy( $policy )   { return wfSetVar( $this->mIndexPolicy, $policy ); }
 219         function setTOCHTML( $tochtml )      { return wfSetVar( $this->mTOCHTML, $tochtml ); }
 220         function setTimestamp( $timestamp )  { return wfSetVar( $this->mTimestamp, $timestamp ); }
 221
 222         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
 223         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
 224         function addWarning( $s )            { $this->mWarnings[$s] = 1; }
 225
 226         function addOutputHook( $hook, $data = false ) {
 227                 $this->mOutputHooks[] = array( $hook, $data );
 228         }
 229
 230         function setNewSection( $value ) {
 231                 $this->mNewSection = (bool)$value;
 232         }
 233         function hideNewSection ( $value ) {
 234                 $this->mHideNewSection = (bool)$value;
 235         }
 236         function getHideNewSection () {
 237                 return (bool)$this->mHideNewSection;
 238         }
 239         function getNewSection() {
 240                 return (bool)$this->mNewSection;
 241         }
 242
 243         function addExternalLink( $url ) {
 244                 # We don't register links pointing to our own server, unless... :-)
 245                 global $wgServer, $wgRegisterInternalExternals;
 246                 if( $wgRegisterInternalExternals or stripos($url,$wgServer.'/')!==0)
 247                         $this->mExternalLinks[$url] = 1;
 248         }
 249
 250         /**
 251          * Record a local or interwiki inline link for saving in future link tables.
 252          *
 253          * @param $title Title object
 254          * @param $id Mixed: optional known page_id so we can skip the lookup
 255          */
 256         function addLink( $title, $id = null ) {
 257                 if ( $title->isExternal() ) {
 258                         // Don't record interwikis in pagelinks
 259                         $this->addInterwikiLink( $title );
 260                         return;
 261                 }
 262                 $ns = $title->getNamespace();
 263                 $dbk = $title->getDBkey();
 264                 if ( $ns == NS_MEDIA ) {
 265                         // Normalize this pseudo-alias if it makes it down here...
 266                         $ns = NS_FILE;
 267                 } elseif( $ns == NS_SPECIAL ) {
 268                         // We don't record Special: links currently
 269                         // It might actually be wise to, but we'd need to do some normalization.
 270                         return;
 271                 } elseif( $dbk === '' ) {
 272                         // Don't record self links -  [[#Foo]]
 273                         return;
 274                 }
 275                 if ( !isset( $this->mLinks[$ns] ) ) {
 276                         $this->mLinks[$ns] = array();
 277                 }
 278                 if ( is_null( $id ) ) {
 279                         $id = $title->getArticleID();
 280                 }
 281                 $this->mLinks[$ns][$dbk] = $id;
 282         }
 283
 284         /**
 285          * Register a file dependency for this output
 286          * @param $name string Title dbKey
 287          * @param $timestamp string MW timestamp of file creation (or false if non-existing)
 288          * @param $sha string base 36 SHA-1 of file (or false if non-existing)
 289          * @return void
 290          */
 291         function addImage( $name, $timestamp = null, $sha1 = null ) {
 292                 $this->mImages[$name] = 1;
 293                 if ( $timestamp !== null && $sha1 !== null ) {
 294                         $this->mFileSearchOptions[$name] = array( 'time' => $timestamp, 'sha1' => $sha1 );
 295                 }
 296         }
 297
 298         /**
 299          * Register a template dependency for this output
 300          * @param $title Title
 301          * @param $page_id
 302          * @param $rev_id
 303          * @return void
 304          */
 305         function addTemplate( $title, $page_id, $rev_id ) {
 306                 $ns = $title->getNamespace();
 307                 $dbk = $title->getDBkey();
 308                 if ( !isset( $this->mTemplates[$ns] ) ) {
 309                         $this->mTemplates[$ns] = array();
 310                 }
 311                 $this->mTemplates[$ns][$dbk] = $page_id;
 312                 if ( !isset( $this->mTemplateIds[$ns] ) ) {
 313                         $this->mTemplateIds[$ns] = array();
 314                 }
 315                 $this->mTemplateIds[$ns][$dbk] = $rev_id; // For versioning
 316         }
 317
 318         /**
 319          * @param $title Title object, must be an interwiki link
 320          * @throws MWException if given invalid input
 321          */
 322         function addInterwikiLink( $title ) {
 323                 $prefix = $title->getInterwiki();
 324                 if( $prefix == '' ) {
 325                         throw new MWException( 'Non-interwiki link passed, internal parser error.' );
 326                 }
 327                 if (!isset($this->mInterwikiLinks[$prefix])) {
 328                         $this->mInterwikiLinks[$prefix] = array();
 329                 }
 330                 $this->mInterwikiLinks[$prefix][$title->getDBkey()] = 1;
 331         }
 332
 333         /**
 334          * Add some text to the <head>.
 335          * If $tag is set, the section with that tag will only be included once
 336          * in a given page.
 337          */
 338         function addHeadItem( $section, $tag = false ) {
 339                 if ( $tag !== false ) {
 340                         $this->mHeadItems[$tag] = $section;
 341                 } else {
 342                         $this->mHeadItems[] = $section;
 343                 }
 344         }
 345
 346         public function addModules( $modules ) {
 347                 $this->mModules = array_merge( $this->mModules, (array) $modules );
 348         }
 349
 350         public function addModuleScripts( $modules ) {
 351                 $this->mModuleScripts = array_merge( $this->mModuleScripts, (array)$modules );
 352         }
 353
 354         public function addModuleStyles( $modules ) {
 355                 $this->mModuleStyles = array_merge( $this->mModuleStyles, (array)$modules );
 356         }
 357
 358         public function addModuleMessages( $modules ) {
 359                 $this->mModuleMessages = array_merge( $this->mModuleMessages, (array)$modules );
 360         }
 361
 362         /**
 363          * Copy items from the OutputPage object into this one
 364          *
 365          * @param $out OutputPage object
 366          */
 367         public function addOutputPageMetadata( OutputPage $out ) {
 368                 $this->addModules( $out->getModules() );
 369                 $this->addModuleScripts( $out->getModuleScripts() );
 370                 $this->addModuleStyles( $out->getModuleStyles() );
 371                 $this->addModuleMessages( $out->getModuleMessages() );
 372
 373                 $this->mHeadItems = array_merge( $this->mHeadItems, $out->getHeadItemsArray() );
 374         }
 375
 376         /**
 377          * Override the title to be used for display
 378          * -- this is assumed to have been validated
 379          * (check equal normalisation, etc.)
 380          *
 381          * @param $text String: desired title text
 382          */
 383         public function setDisplayTitle( $text ) {
 384                 $this->setTitleText( $text );
 385                 $this->setProperty( 'displaytitle', $text );
 386         }
 387
 388         /**
 389          * Get the title to be used for display
 390          *
 391          * @return String
 392          */
 393         public function getDisplayTitle() {
 394                 $t = $this->getTitleText();
 395                 if( $t === '' ) {
 396                         return false;
 397                 }
 398                 return $t;
 399         }
 400
 401         /**
 402          * Fairly generic flag setter thingy.
 403          */
 404         public function setFlag( $flag ) {
 405                 $this->mFlags[$flag] = true;
 406         }
 407
 408         public function getFlag( $flag ) {
 409                 return isset( $this->mFlags[$flag] );
 410         }
 411
 412         /**
 413          * Set a property to be cached in the DB
 414          */
 415         public function setProperty( $name, $value ) {
 416                 $this->mProperties[$name] = $value;
 417         }
 418
 419         public function getProperty( $name ){
 420                 return isset( $this->mProperties[$name] ) ? $this->mProperties[$name] : false;
 421         }
 422
 423         public function getProperties() {
 424                 if ( !isset( $this->mProperties ) ) {
 425                         $this->mProperties = array();
 426                 }
 427                 return $this->mProperties;
 428         }
 429
 430
 431         /**
 432          * Returns the options from its ParserOptions which have been taken
 433          * into account to produce this output or false if not available.
 434          * @return mixed Array
 435          */
 436          public function getUsedOptions() {
 437                 if ( !isset( $this->mAccessedOptions ) ) {
 438                         return array();
 439                 }
 440                 return array_keys( $this->mAccessedOptions );
 441          }
 442
 443          /**
 444           * Callback passed by the Parser to the ParserOptions to keep track of which options are used.
 445           * @access private
 446           */
 447          function recordOption( $option ) {
 448                  $this->mAccessedOptions[$option] = true;
 449          }
 450 }