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          * @return int|mixed|null
  64          */
  65         function getCacheExpiry() {
  66                 global $wgParserCacheExpireTime;
  67
  68                 if ( $this->mCacheTime < 0 ) {
  69                         return 0;
  70                 } // old-style marker for "not cachable"
  71
  72                 $expire = $this->mCacheExpiry;
  73
  74                 if ( $expire === null ) {
  75                         $expire = $wgParserCacheExpireTime;
  76                 } else {
  77                         $expire = min( $expire, $wgParserCacheExpireTime );
  78                 }
  79
  80                 if( $this->containsOldMagic() ) { //compatibility hack
  81                         $expire = min( $expire, 3600 ); # 1 hour
  82                 }
  83
  84                 if ( $expire <= 0 ) {
  85                         return 0; // not cachable
  86                 } else {
  87                         return $expire;
  88                 }
  89         }
  90
  91         /**
  92          * @return bool
  93          */
  94         function isCacheable() {
  95                 return $this->getCacheExpiry() > 0;
  96         }
  97
  98         /**
  99          * Return true if this cached output object predates the global or
 100          * per-article cache invalidation timestamps, or if it comes from
 101          * an incompatible older version.
 102          *
 103          * @param $touched String: the affected article's last touched timestamp
 104          * @return Boolean
 105          */
 106         public function expired( $touched ) {
 107                 global $wgCacheEpoch;
 108                 return !$this->isCacheable() || // parser says it's uncacheable
 109                            $this->getCacheTime() < $touched ||
 110                            $this->getCacheTime() <= $wgCacheEpoch ||
 111                            $this->getCacheTime() < wfTimestamp( TS_MW, time() - $this->getCacheExpiry() ) || // expiry period has passed
 112                            !isset( $this->mVersion ) ||
 113                            version_compare( $this->mVersion, Parser::VERSION, "lt" );
 114         }
 115 }
 116
 117 class ParserOutput extends CacheTime {
 118         var $mText,                       # The output text
 119                 $mLanguageLinks,              # List of the full text of language links, in the order they appear
 120                 $mCategories,                 # Map of category names to sort keys
 121                 $mTitleText,                  # title text of the chosen language variant
 122                 $mLinks = array(),            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
 123                 $mTemplates = array(),        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
 124                 $mTemplateIds = array(),      # 2-D map of NS/DBK to rev ID for the template references. ID=zero for broken.
 125                 $mImages = array(),           # DB keys of the images used, in the array key only
 126                 $mFileSearchOptions = array(), # DB keys of the images used mapped to sha1 and MW timestamp
 127                 $mExternalLinks = array(),    # External link URLs, in the key only
 128                 $mInterwikiLinks = array(),   # 2-D map of prefix/DBK (in keys only) for the inline interwiki links in the document.
 129                 $mNewSection = false,         # Show a new section link?
 130                 $mHideNewSection = false,     # Hide the new section link?
 131                 $mNoGallery = false,          # No gallery on category page? (__NOGALLERY__)
 132                 $mHeadItems = array(),        # Items to put in the <head> section
 133                 $mModules = array(),          # Modules to be loaded by the resource loader
 134                 $mModuleScripts = array(),    # Modules of which only the JS will be loaded by the resource loader
 135                 $mModuleStyles = array(),     # Modules of which only the CSSS will be loaded by the resource loader
 136                 $mModuleMessages = array(),   # Modules of which only the messages will be loaded by the resource loader
 137                 $mOutputHooks = array(),      # Hook tags as per $wgParserOutputHooks
 138                 $mWarnings = array(),         # Warning text to be returned to the user. Wikitext formatted, in the key only
 139                 $mSections = array(),         # Table of contents
 140                 $mEditSectionTokens = false,  # prefix/suffix markers if edit sections were output as tokens
 141                 $mProperties = array(),       # Name/value pairs to be cached in the DB
 142                 $mTOCHTML = '',               # HTML of the TOC
 143                 $mTimestamp;                  # Timestamp of the revision
 144         private $mIndexPolicy = '';       # 'index' or 'noindex'?  Any other value will result in no change.
 145         private $mAccessedOptions = array(); # List of ParserOptions (stored in the keys)
 146
 147         const EDITSECTION_REGEX = '#<(?:mw:)?editsection page="(.*?)" section="(.*?)"(?:/>|>(.*?)(</(?:mw:)?editsection>))#';
 148
 149         function __construct( $text = '', $languageLinks = array(), $categoryLinks = array(),
 150                 $containsOldMagic = false, $titletext = '' )
 151         {
 152                 $this->mText = $text;
 153                 $this->mLanguageLinks = $languageLinks;
 154                 $this->mCategories = $categoryLinks;
 155                 $this->mContainsOldMagic = $containsOldMagic;
 156                 $this->mTitleText = $titletext;
 157         }
 158
 159         function getText() {
 160                 if ( $this->mEditSectionTokens ) {
 161                         return preg_replace_callback( ParserOutput::EDITSECTION_REGEX,
 162                                 array( &$this, 'replaceEditSectionLinksCallback' ), $this->mText );
 163                 }
 164                 return preg_replace( ParserOutput::EDITSECTION_REGEX, '', $this->mText );
 165         }
 166
 167         /**
 168          * callback used by getText to replace editsection tokens
 169          * @private
 170          * @return mixed
 171          */
 172         function replaceEditSectionLinksCallback( $m ) {
 173                 global $wgOut, $wgLang;
 174                 $args = array(
 175                         htmlspecialchars_decode($m[1]),
 176                         htmlspecialchars_decode($m[2]),
 177                         isset($m[4]) ? $m[3] : null,
 178                 );
 179                 $args[0] = Title::newFromText( $args[0] );
 180                 if ( !is_object($args[0]) ) {
 181                         throw new MWException("Bad parser output text.");
 182                 }
 183                 $args[] = $wgLang->getCode();
 184                 $skin = $wgOut->getSkin();
 185                 return call_user_func_array( array( $skin, 'doEditSectionLink' ), $args );
 186         }
 187
 188         function &getLanguageLinks()         { return $this->mLanguageLinks; }
 189         function getInterwikiLinks()         { return $this->mInterwikiLinks; }
 190         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
 191         function &getCategories()            { return $this->mCategories; }
 192         function getTitleText()              { return $this->mTitleText; }
 193         function getSections()               { return $this->mSections; }
 194         function getEditSectionTokens()      { return $this->mEditSectionTokens; }
 195         function &getLinks()                 { return $this->mLinks; }
 196         function &getTemplates()             { return $this->mTemplates; }
 197         function &getTemplateIds()           { return $this->mTemplateIds; }
 198         function &getImages()                { return $this->mImages; }
 199         function &getFileSearchOptions()     { return $this->mFileSearchOptions; }
 200         function &getExternalLinks()         { return $this->mExternalLinks; }
 201         function getNoGallery()              { return $this->mNoGallery; }
 202         function getHeadItems()              { return $this->mHeadItems; }
 203         function getModules()                { return $this->mModules; }
 204         function getModuleScripts()          { return $this->mModuleScripts; }
 205         function getModuleStyles()           { return $this->mModuleStyles; }
 206         function getModuleMessages()         { return $this->mModuleMessages; }
 207         function getOutputHooks()            { return (array)$this->mOutputHooks; }
 208         function getWarnings()               { return array_keys( $this->mWarnings ); }
 209         function getIndexPolicy()            { return $this->mIndexPolicy; }
 210         function getTOCHTML()                { return $this->mTOCHTML; }
 211         function getTimestamp()              { return $this->mTimestamp; }
 212
 213         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
 214         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
 215         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
 216
 217         function setTitleText( $t )          { return wfSetVar( $this->mTitleText, $t ); }
 218         function setSections( $toc )         { return wfSetVar( $this->mSections, $toc ); }
 219         function setEditSectionTokens( $t )  { return wfSetVar( $this->mEditSectionTokens, $t ); }
 220         function setIndexPolicy( $policy )   { return wfSetVar( $this->mIndexPolicy, $policy ); }
 221         function setTOCHTML( $tochtml )      { return wfSetVar( $this->mTOCHTML, $tochtml ); }
 222         function setTimestamp( $timestamp )  { return wfSetVar( $this->mTimestamp, $timestamp ); }
 223
 224         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
 225         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
 226         function addWarning( $s )            { $this->mWarnings[$s] = 1; }
 227
 228         function addOutputHook( $hook, $data = false ) {
 229                 $this->mOutputHooks[] = array( $hook, $data );
 230         }
 231
 232         function setNewSection( $value ) {
 233                 $this->mNewSection = (bool)$value;
 234         }
 235         function hideNewSection ( $value ) {
 236                 $this->mHideNewSection = (bool)$value;
 237         }
 238         function getHideNewSection () {
 239                 return (bool)$this->mHideNewSection;
 240         }
 241         function getNewSection() {
 242                 return (bool)$this->mNewSection;
 243         }
 244
 245         function addExternalLink( $url ) {
 246                 # We don't register links pointing to our own server, unless... :-)
 247                 global $wgServer, $wgRegisterInternalExternals;
 248                 if( $wgRegisterInternalExternals or stripos($url,$wgServer.'/')!==0)
 249                         $this->mExternalLinks[$url] = 1;
 250         }
 251
 252         /**
 253          * Record a local or interwiki inline link for saving in future link tables.
 254          *
 255          * @param $title Title object
 256          * @param $id Mixed: optional known page_id so we can skip the lookup
 257          */
 258         function addLink( $title, $id = null ) {
 259                 if ( $title->isExternal() ) {
 260                         // Don't record interwikis in pagelinks
 261                         $this->addInterwikiLink( $title );
 262                         return;
 263                 }
 264                 $ns = $title->getNamespace();
 265                 $dbk = $title->getDBkey();
 266                 if ( $ns == NS_MEDIA ) {
 267                         // Normalize this pseudo-alias if it makes it down here...
 268                         $ns = NS_FILE;
 269                 } elseif( $ns == NS_SPECIAL ) {
 270                         // We don't record Special: links currently
 271                         // It might actually be wise to, but we'd need to do some normalization.
 272                         return;
 273                 } elseif( $dbk === '' ) {
 274                         // Don't record self links -  [[#Foo]]
 275                         return;
 276                 }
 277                 if ( !isset( $this->mLinks[$ns] ) ) {
 278                         $this->mLinks[$ns] = array();
 279                 }
 280                 if ( is_null( $id ) ) {
 281                         $id = $title->getArticleID();
 282                 }
 283                 $this->mLinks[$ns][$dbk] = $id;
 284         }
 285
 286         /**
 287          * Register a file dependency for this output
 288          * @param $name string Title dbKey
 289          * @param $timestamp string MW timestamp of file creation (or false if non-existing)
 290          * @param $sha1 string base 36 SHA-1 of file (or false if non-existing)
 291          * @return void
 292          */
 293         function addImage( $name, $timestamp = null, $sha1 = null ) {
 294                 $this->mImages[$name] = 1;
 295                 if ( $timestamp !== null && $sha1 !== null ) {
 296                         $this->mFileSearchOptions[$name] = array( 'time' => $timestamp, 'sha1' => $sha1 );
 297                 }
 298         }
 299
 300         /**
 301          * Register a template dependency for this output
 302          * @param $title Title
 303          * @param $page_id
 304          * @param $rev_id
 305          * @return void
 306          */
 307         function addTemplate( $title, $page_id, $rev_id ) {
 308                 $ns = $title->getNamespace();
 309                 $dbk = $title->getDBkey();
 310                 if ( !isset( $this->mTemplates[$ns] ) ) {
 311                         $this->mTemplates[$ns] = array();
 312                 }
 313                 $this->mTemplates[$ns][$dbk] = $page_id;
 314                 if ( !isset( $this->mTemplateIds[$ns] ) ) {
 315                         $this->mTemplateIds[$ns] = array();
 316                 }
 317                 $this->mTemplateIds[$ns][$dbk] = $rev_id; // For versioning
 318         }
 319
 320         /**
 321          * @param $title Title object, must be an interwiki link
 322          * @throws MWException if given invalid input
 323          */
 324         function addInterwikiLink( $title ) {
 325                 $prefix = $title->getInterwiki();
 326                 if( $prefix == '' ) {
 327                         throw new MWException( 'Non-interwiki link passed, internal parser error.' );
 328                 }
 329                 if (!isset($this->mInterwikiLinks[$prefix])) {
 330                         $this->mInterwikiLinks[$prefix] = array();
 331                 }
 332                 $this->mInterwikiLinks[$prefix][$title->getDBkey()] = 1;
 333         }
 334
 335         /**
 336          * Add some text to the <head>.
 337          * If $tag is set, the section with that tag will only be included once
 338          * in a given page.
 339          */
 340         function addHeadItem( $section, $tag = false ) {
 341                 if ( $tag !== false ) {
 342                         $this->mHeadItems[$tag] = $section;
 343                 } else {
 344                         $this->mHeadItems[] = $section;
 345                 }
 346         }
 347
 348         public function addModules( $modules ) {
 349                 $this->mModules = array_merge( $this->mModules, (array) $modules );
 350         }
 351
 352         public function addModuleScripts( $modules ) {
 353                 $this->mModuleScripts = array_merge( $this->mModuleScripts, (array)$modules );
 354         }
 355
 356         public function addModuleStyles( $modules ) {
 357                 $this->mModuleStyles = array_merge( $this->mModuleStyles, (array)$modules );
 358         }
 359
 360         public function addModuleMessages( $modules ) {
 361                 $this->mModuleMessages = array_merge( $this->mModuleMessages, (array)$modules );
 362         }
 363
 364         /**
 365          * Copy items from the OutputPage object into this one
 366          *
 367          * @param $out OutputPage object
 368          */
 369         public function addOutputPageMetadata( OutputPage $out ) {
 370                 $this->addModules( $out->getModules() );
 371                 $this->addModuleScripts( $out->getModuleScripts() );
 372                 $this->addModuleStyles( $out->getModuleStyles() );
 373                 $this->addModuleMessages( $out->getModuleMessages() );
 374
 375                 $this->mHeadItems = array_merge( $this->mHeadItems, $out->getHeadItemsArray() );
 376         }
 377
 378         /**
 379          * Override the title to be used for display
 380          * -- this is assumed to have been validated
 381          * (check equal normalisation, etc.)
 382          *
 383          * @param $text String: desired title text
 384          */
 385         public function setDisplayTitle( $text ) {
 386                 $this->setTitleText( $text );
 387                 $this->setProperty( 'displaytitle', $text );
 388         }
 389
 390         /**
 391          * Get the title to be used for display
 392          *
 393          * @return String
 394          */
 395         public function getDisplayTitle() {
 396                 $t = $this->getTitleText();
 397                 if( $t === '' ) {
 398                         return false;
 399                 }
 400                 return $t;
 401         }
 402
 403         /**
 404          * Fairly generic flag setter thingy.
 405          */
 406         public function setFlag( $flag ) {
 407                 $this->mFlags[$flag] = true;
 408         }
 409
 410         public function getFlag( $flag ) {
 411                 return isset( $this->mFlags[$flag] );
 412         }
 413
 414         /**
 415          * Set a property to be cached in the DB
 416          */
 417         public function setProperty( $name, $value ) {
 418                 $this->mProperties[$name] = $value;
 419         }
 420
 421         public function getProperty( $name ){
 422                 return isset( $this->mProperties[$name] ) ? $this->mProperties[$name] : false;
 423         }
 424
 425         public function getProperties() {
 426                 if ( !isset( $this->mProperties ) ) {
 427                         $this->mProperties = array();
 428                 }
 429                 return $this->mProperties;
 430         }
 431
 432
 433         /**
 434          * Returns the options from its ParserOptions which have been taken
 435          * into account to produce this output or false if not available.
 436          * @return mixed Array
 437          */
 438          public function getUsedOptions() {
 439                 if ( !isset( $this->mAccessedOptions ) ) {
 440                         return array();
 441                 }
 442                 return array_keys( $this->mAccessedOptions );
 443          }
 444
 445          /**
 446           * Callback passed by the Parser to the ParserOptions to keep track of which options are used.
 447           * @access private
 448           */
 449          function recordOption( $option ) {
 450                  $this->mAccessedOptions[$option] = true;
 451          }
 452 }