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                 $mImageTimeKeys = 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                 $mOutputHooks = array(),      # Hook tags as per $wgParserOutputHooks
 134                 $mWarnings = array(),         # Warning text to be returned to the user. Wikitext formatted, in the key only
 135                 $mSections = array(),         # Table of contents
 136                 $mEditSectionTokens = false,  # prefix/suffix markers if edit sections were output as tokens
 137                 $mProperties = array(),       # Name/value pairs to be cached in the DB
 138                 $mTOCHTML = '';               # HTML of the TOC
 139         private $mIndexPolicy = '';           # 'index' or 'noindex'?  Any other value will result in no change.
 140         private $mAccessedOptions = array(); # List of ParserOptions (stored in the keys)
 141
 142         const EDITSECTION_REGEX = '#<(?:mw:)?editsection page="(.*?)" section="(.*?)"(?:/>|>(.*?)(</(?:mw:)?editsection>))#';
 143
 144         function __construct( $text = '', $languageLinks = array(), $categoryLinks = array(),
 145                 $containsOldMagic = false, $titletext = '' )
 146         {
 147                 $this->mText = $text;
 148                 $this->mLanguageLinks = $languageLinks;
 149                 $this->mCategories = $categoryLinks;
 150                 $this->mContainsOldMagic = $containsOldMagic;
 151                 $this->mTitleText = $titletext;
 152         }
 153
 154         function getText() {
 155                 if ( $this->mEditSectionTokens ) {
 156                         return preg_replace_callback( ParserOutput::EDITSECTION_REGEX,
 157                                 array( &$this, 'replaceEditSectionLinksCallback' ), $this->mText );
 158                 }
 159                 return $this->mText;
 160         }
 161
 162         /**
 163          * callback used by getText to replace editsection tokens
 164          * @private
 165          */
 166         function replaceEditSectionLinksCallback( $m ) {
 167                 global $wgOut, $wgLang;
 168                 $args = array(
 169                         htmlspecialchars_decode($m[1]),
 170                         htmlspecialchars_decode($m[2]),
 171                         isset($m[4]) ? $m[3] : null,
 172                 );
 173                 $args[0] = Title::newFromText( $args[0] );
 174                 if ( !is_object($args[0]) ) {
 175                         throw new MWException("Bad parser output text.");
 176                 }
 177                 $args[] = $wgLang->getCode();
 178                 $skin = $wgOut->getSkin();
 179                 return call_user_func_array( array( $skin, 'doEditSectionLink' ), $args );
 180         }
 181
 182         function &getLanguageLinks()         { return $this->mLanguageLinks; }
 183         function getInterwikiLinks()         { return $this->mInterwikiLinks; }
 184         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
 185         function &getCategories()            { return $this->mCategories; }
 186         function getTitleText()              { return $this->mTitleText; }
 187         function getSections()               { return $this->mSections; }
 188         function getEditSectionTokens()      { return $this->mEditSectionTokens; }
 189         function &getLinks()                 { return $this->mLinks; }
 190         function &getTemplates()             { return $this->mTemplates; }
 191         function &getTemplateIds()           { return $this->mTemplateIds; }
 192         function &getImages()                { return $this->mImages; }
 193         function &getImageTimeKeys()         { return $this->mImageTimeKeys; }
 194         function &getExternalLinks()         { return $this->mExternalLinks; }
 195         function getNoGallery()              { return $this->mNoGallery; }
 196         function getHeadItems()              { return $this->mHeadItems; }
 197         function getModules()                { return $this->mModules; }
 198         function getOutputHooks()            { return (array)$this->mOutputHooks; }
 199         function getWarnings()               { return array_keys( $this->mWarnings ); }
 200         function getIndexPolicy()            { return $this->mIndexPolicy; }
 201         function getTOCHTML()                { return $this->mTOCHTML; }
 202
 203         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
 204         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
 205         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
 206
 207         function setTitleText( $t )          { return wfSetVar( $this->mTitleText, $t ); }
 208         function setSections( $toc )         { return wfSetVar( $this->mSections, $toc ); }
 209         function setEditSectionTokens( $t )  { return wfSetVar( $this->mEditSectionTokens, $t ); }
 210         function setIndexPolicy( $policy )   { return wfSetVar( $this->mIndexPolicy, $policy ); }
 211         function setTOCHTML( $tochtml )      { return wfSetVar( $this->mTOCHTML, $tochtml ); }
 212
 213         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
 214         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
 215         function addWarning( $s )            { $this->mWarnings[$s] = 1; }
 216
 217         function addOutputHook( $hook, $data = false ) {
 218                 $this->mOutputHooks[] = array( $hook, $data );
 219         }
 220
 221         function setNewSection( $value ) {
 222                 $this->mNewSection = (bool)$value;
 223         }
 224         function hideNewSection ( $value ) {
 225                 $this->mHideNewSection = (bool)$value;
 226         }
 227         function getHideNewSection () {
 228                 return (bool)$this->mHideNewSection;
 229         }
 230         function getNewSection() {
 231                 return (bool)$this->mNewSection;
 232         }
 233
 234         function addExternalLink( $url ) {
 235                 # We don't register links pointing to our own server, unless... :-)
 236                 global $wgServer, $wgRegisterInternalExternals;
 237                 if( $wgRegisterInternalExternals or stripos($url,$wgServer.'/')!==0)
 238                         $this->mExternalLinks[$url] = 1;
 239         }
 240
 241         /**
 242          * Record a local or interwiki inline link for saving in future link tables.
 243          *
 244          * @param $title Title object
 245          * @param $id Mixed: optional known page_id so we can skip the lookup
 246          */
 247         function addLink( $title, $id = null ) {
 248                 if ( $title->isExternal() ) {
 249                         // Don't record interwikis in pagelinks
 250                         $this->addInterwikiLink( $title );
 251                         return;
 252                 }
 253                 $ns = $title->getNamespace();
 254                 $dbk = $title->getDBkey();
 255                 if ( $ns == NS_MEDIA ) {
 256                         // Normalize this pseudo-alias if it makes it down here...
 257                         $ns = NS_FILE;
 258                 } elseif( $ns == NS_SPECIAL ) {
 259                         // We don't record Special: links currently
 260                         // It might actually be wise to, but we'd need to do some normalization.
 261                         return;
 262                 } elseif( $dbk === '' ) {
 263                         // Don't record self links -  [[#Foo]]
 264                         return;
 265                 }
 266                 if ( !isset( $this->mLinks[$ns] ) ) {
 267                         $this->mLinks[$ns] = array();
 268                 }
 269                 if ( is_null( $id ) ) {
 270                         $id = $title->getArticleID();
 271                 }
 272                 $this->mLinks[$ns][$dbk] = $id;
 273         }
 274
 275         /**
 276          * Register a file dependency for this output
 277          * @param $name string Title dbKey
 278          * @param $timestamp string MW timestamp of file creation (or false if non-existing)
 279          * @param $sha string base 36 SHA-1 of file (or false if non-existing)
 280          * @return void
 281          */
 282         function addImage( $name, $timestamp = null, $sha1 = null ) {
 283                 $this->mImages[$name] = 1;
 284                 if ( $timestamp !== null && $sha1 !== null ) {
 285                         $this->mImageTimeKeys[$name] = array( 'time' => $timestamp, 'sha1' => $sha1 );
 286                 }
 287         }
 288
 289         /**
 290          * Register a template dependency for this output
 291          * @param $title Title
 292          * @param $page_id
 293          * @param $rev_id
 294          * @return void
 295          */
 296         function addTemplate( $title, $page_id, $rev_id ) {
 297                 $ns = $title->getNamespace();
 298                 $dbk = $title->getDBkey();
 299                 if ( !isset( $this->mTemplates[$ns] ) ) {
 300                         $this->mTemplates[$ns] = array();
 301                 }
 302                 $this->mTemplates[$ns][$dbk] = $page_id;
 303                 if ( !isset( $this->mTemplateIds[$ns] ) ) {
 304                         $this->mTemplateIds[$ns] = array();
 305                 }
 306                 $this->mTemplateIds[$ns][$dbk] = $rev_id; // For versioning
 307         }
 308
 309         /**
 310          * @param $title Title object, must be an interwiki link
 311          * @throws MWException if given invalid input
 312          */
 313         function addInterwikiLink( $title ) {
 314                 $prefix = $title->getInterwiki();
 315                 if( $prefix == '' ) {
 316                         throw new MWException( 'Non-interwiki link passed, internal parser error.' );
 317                 }
 318                 if (!isset($this->mInterwikiLinks[$prefix])) {
 319                         $this->mInterwikiLinks[$prefix] = array();
 320                 }
 321                 $this->mInterwikiLinks[$prefix][$title->getDBkey()] = 1;
 322         }
 323
 324         /**
 325          * Add some text to the <head>.
 326          * If $tag is set, the section with that tag will only be included once
 327          * in a given page.
 328          */
 329         function addHeadItem( $section, $tag = false ) {
 330                 if ( $tag !== false ) {
 331                         $this->mHeadItems[$tag] = $section;
 332                 } else {
 333                         $this->mHeadItems[] = $section;
 334                 }
 335         }
 336
 337         function addModules( $modules ) {
 338                 $this->mModules = array_merge( $this->mModules, (array) $modules );
 339         }
 340
 341         /**
 342          * Override the title to be used for display
 343          * -- this is assumed to have been validated
 344          * (check equal normalisation, etc.)
 345          *
 346          * @param $text String: desired title text
 347          */
 348         public function setDisplayTitle( $text ) {
 349                 $this->setTitleText( $text );
 350                 $this->setProperty( 'displaytitle', $text );
 351         }
 352
 353         /**
 354          * Get the title to be used for display
 355          *
 356          * @return String
 357          */
 358         public function getDisplayTitle() {
 359                 $t = $this->getTitleText();
 360                 if( $t === '' ) {
 361                         return false;
 362                 }
 363                 return $t;
 364         }
 365
 366         /**
 367          * Fairly generic flag setter thingy.
 368          */
 369         public function setFlag( $flag ) {
 370                 $this->mFlags[$flag] = true;
 371         }
 372
 373         public function getFlag( $flag ) {
 374                 return isset( $this->mFlags[$flag] );
 375         }
 376
 377         /**
 378          * Set a property to be cached in the DB
 379          */
 380         public function setProperty( $name, $value ) {
 381                 $this->mProperties[$name] = $value;
 382         }
 383
 384         public function getProperty( $name ){
 385                 return isset( $this->mProperties[$name] ) ? $this->mProperties[$name] : false;
 386         }
 387
 388         public function getProperties() {
 389                 if ( !isset( $this->mProperties ) ) {
 390                         $this->mProperties = array();
 391                 }
 392                 return $this->mProperties;
 393         }
 394
 395
 396         /**
 397          * Returns the options from its ParserOptions which have been taken
 398          * into account to produce this output or false if not available.
 399          * @return mixed Array
 400          */
 401          public function getUsedOptions() {
 402                 if ( !isset( $this->mAccessedOptions ) ) {
 403                         return array();
 404                 }
 405                 return array_keys( $this->mAccessedOptions );
 406          }
 407
 408          /**
 409           * Callback passed by the Parser to the ParserOptions to keep track of which options are used.
 410           * @access private
 411           */
 412          function recordOption( $option ) {
 413                  $this->mAccessedOptions[$option] = true;
 414          }
 415 }