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