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                 $mImageTimeKeys = array(),        # DB keys of the images used mapped to sha1 and MW timestamp
 113                 $mExternalLinks = array(),    # External link URLs, in the key only
 114                 $mInterwikiLinks = array(),   # 2-D map of prefix/DBK (in keys only) for the inline interwiki links in the document.
 115                 $mNewSection = false,         # Show a new section link?
 116                 $mHideNewSection = false,     # Hide the new section link?
 117                 $mNoGallery = false,          # No gallery on category page? (__NOGALLERY__)
 118                 $mHeadItems = array(),        # Items to put in the <head> section
 119                 $mModules = array(),          # Modules to be loaded by the resource loader
 120                 $mOutputHooks = array(),      # Hook tags as per $wgParserOutputHooks
 121                 $mWarnings = array(),         # Warning text to be returned to the user. Wikitext formatted, in the key only
 122                 $mSections = array(),         # Table of contents
 123                 $mEditSectionTokens = false,  # prefix/suffix markers if edit sections were output as tokens
 124                 $mProperties = array(),       # Name/value pairs to be cached in the DB
 125                 $mTOCHTML = '';               # HTML of the TOC
 126         private $mIndexPolicy = '';           # 'index' or 'noindex'?  Any other value will result in no change.
 127         private $mAccessedOptions = array(); # List of ParserOptions (stored in the keys)
 128
 129         const EDITSECTION_REGEX = '#<(?:mw:)?editsection page="(.*?)" section="(.*?)"(?:/>|>(.*?)(</(?:mw:)?editsection>))#';
 130
 131         function __construct( $text = '', $languageLinks = array(), $categoryLinks = array(),
 132                 $containsOldMagic = false, $titletext = '' )
 133         {
 134                 $this->mText = $text;
 135                 $this->mLanguageLinks = $languageLinks;
 136                 $this->mCategories = $categoryLinks;
 137                 $this->mContainsOldMagic = $containsOldMagic;
 138                 $this->mTitleText = $titletext;
 139         }
 140
 141         function getText() {
 142                 if ( $this->mEditSectionTokens ) {
 143                         return preg_replace_callback( ParserOutput::EDITSECTION_REGEX,
 144                                 array( &$this, 'replaceEditSectionLinksCallback' ), $this->mText );
 145                 }
 146                 return $this->mText;
 147         }
 148
 149         /**
 150          * callback used by getText to replace editsection tokens
 151          * @private
 152          */
 153         function replaceEditSectionLinksCallback( $m ) {
 154                 global $wgOut, $wgLang;
 155                 $args = array(
 156                         htmlspecialchars_decode($m[1]),
 157                         htmlspecialchars_decode($m[2]),
 158                         isset($m[4]) ? $m[3] : null,
 159                 );
 160                 $args[0] = Title::newFromText( $args[0] );
 161                 if ( !is_object($args[0]) ) {
 162                         throw new MWException("Bad parser output text.");
 163                 }
 164                 $args[] = $wgLang->getCode();
 165                 $skin = $wgOut->getSkin();
 166                 return call_user_func_array( array( $skin, 'doEditSectionLink' ), $args );
 167         }
 168
 169         function &getLanguageLinks()         { return $this->mLanguageLinks; }
 170         function getInterwikiLinks()         { return $this->mInterwikiLinks; }
 171         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
 172         function &getCategories()            { return $this->mCategories; }
 173         function getTitleText()              { return $this->mTitleText; }
 174         function getSections()               { return $this->mSections; }
 175         function getEditSectionTokens()      { return $this->mEditSectionTokens; }
 176         function &getLinks()                 { return $this->mLinks; }
 177         function &getTemplates()             { return $this->mTemplates; }
 178         function &getTemplateIds()           { return $this->mTemplateIds; }
 179         function &getImages()                { return $this->mImages; }
 180         function &getImageTimeKeys()         { return $this->mImageTimeKeys; }
 181         function &getExternalLinks()         { return $this->mExternalLinks; }
 182         function getNoGallery()              { return $this->mNoGallery; }
 183         function getHeadItems()              { return $this->mHeadItems; }
 184         function getModules()                { return $this->mModules; }
 185         function getOutputHooks()            { return (array)$this->mOutputHooks; }
 186         function getWarnings()               { return array_keys( $this->mWarnings ); }
 187         function getIndexPolicy()            { return $this->mIndexPolicy; }
 188         function getTOCHTML()                { return $this->mTOCHTML; }
 189
 190         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
 191         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
 192         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
 193
 194         function setTitleText( $t )          { return wfSetVar( $this->mTitleText, $t ); }
 195         function setSections( $toc )         { return wfSetVar( $this->mSections, $toc ); }
 196         function setEditSectionTokens( $t )  { return wfSetVar( $this->mEditSectionTokens, $t ); }
 197         function setIndexPolicy( $policy )   { return wfSetVar( $this->mIndexPolicy, $policy ); }
 198         function setTOCHTML( $tochtml )      { return wfSetVar( $this->mTOCHTML, $tochtml ); }
 199
 200         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
 201         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
 202         function addWarning( $s )            { $this->mWarnings[$s] = 1; }
 203
 204         function addOutputHook( $hook, $data = false ) {
 205                 $this->mOutputHooks[] = array( $hook, $data );
 206         }
 207
 208         function setNewSection( $value ) {
 209                 $this->mNewSection = (bool)$value;
 210         }
 211         function hideNewSection ( $value ) {
 212                 $this->mHideNewSection = (bool)$value;
 213         }
 214         function getHideNewSection () {
 215                 return (bool)$this->mHideNewSection;
 216         }
 217         function getNewSection() {
 218                 return (bool)$this->mNewSection;
 219         }
 220
 221         function addExternalLink( $url ) {
 222                 # We don't register links pointing to our own server, unless... :-)
 223                 global $wgServer, $wgRegisterInternalExternals;
 224                 if( $wgRegisterInternalExternals or stripos($url,$wgServer.'/')!==0)
 225                         $this->mExternalLinks[$url] = 1;
 226         }
 227
 228         /**
 229          * Record a local or interwiki inline link for saving in future link tables.
 230          *
 231          * @param $title Title object
 232          * @param $id Mixed: optional known page_id so we can skip the lookup
 233          */
 234         function addLink( $title, $id = null ) {
 235                 if ( $title->isExternal() ) {
 236                         // Don't record interwikis in pagelinks
 237                         $this->addInterwikiLink( $title );
 238                         return;
 239                 }
 240                 $ns = $title->getNamespace();
 241                 $dbk = $title->getDBkey();
 242                 if ( $ns == NS_MEDIA ) {
 243                         // Normalize this pseudo-alias if it makes it down here...
 244                         $ns = NS_FILE;
 245                 } elseif( $ns == NS_SPECIAL ) {
 246                         // We don't record Special: links currently
 247                         // It might actually be wise to, but we'd need to do some normalization.
 248                         return;
 249                 } elseif( $dbk === '' ) {
 250                         // Don't record self links -  [[#Foo]]
 251                         return;
 252                 }
 253                 if ( !isset( $this->mLinks[$ns] ) ) {
 254                         $this->mLinks[$ns] = array();
 255                 }
 256                 if ( is_null( $id ) ) {
 257                         $id = $title->getArticleID();
 258                 }
 259                 $this->mLinks[$ns][$dbk] = $id;
 260         }
 261
 262         /**
 263          * Register a file dependency for this output
 264          * @param $name string Title dbKey
 265          * @param $timestamp string MW timestamp of file creation (or false if non-existing)
 266          * @param $sha string base 36 SHA-1 of file (or false if non-existing)
 267          * @return void
 268          */
 269         function addImage( $name, $timestamp = null, $sha1 = null ) {
 270                 $this->mImages[$name] = 1;
 271                 if ( $timestamp !== null && $sha1 !== null ) {
 272                         $this->mImageTimeKeys[$name] = array( 'time' => $timestamp, 'sha1' => $sha1 );
 273                 }
 274         }
 275
 276         /**
 277          * Register a template dependency for this output
 278          * @param $title Title
 279          * @param $page_id
 280          * @param $rev_id
 281          * @return void
 282          */
 283         function addTemplate( $title, $page_id, $rev_id ) {
 284                 $ns = $title->getNamespace();
 285                 $dbk = $title->getDBkey();
 286                 if ( !isset( $this->mTemplates[$ns] ) ) {
 287                         $this->mTemplates[$ns] = array();
 288                 }
 289                 $this->mTemplates[$ns][$dbk] = $page_id;
 290                 if ( !isset( $this->mTemplateIds[$ns] ) ) {
 291                         $this->mTemplateIds[$ns] = array();
 292                 }
 293                 $this->mTemplateIds[$ns][$dbk] = $rev_id; // For versioning
 294         }
 295
 296         /**
 297          * @param $title Title object, must be an interwiki link
 298          * @throws MWException if given invalid input
 299          */
 300         function addInterwikiLink( $title ) {
 301                 $prefix = $title->getInterwiki();
 302                 if( $prefix == '' ) {
 303                         throw new MWException( 'Non-interwiki link passed, internal parser error.' );
 304                 }
 305                 if (!isset($this->mInterwikiLinks[$prefix])) {
 306                         $this->mInterwikiLinks[$prefix] = array();
 307                 }
 308                 $this->mInterwikiLinks[$prefix][$title->getDBkey()] = 1;
 309         }
 310
 311         /**
 312          * Add some text to the <head>.
 313          * If $tag is set, the section with that tag will only be included once
 314          * in a given page.
 315          */
 316         function addHeadItem( $section, $tag = false ) {
 317                 if ( $tag !== false ) {
 318                         $this->mHeadItems[$tag] = $section;
 319                 } else {
 320                         $this->mHeadItems[] = $section;
 321                 }
 322         }
 323
 324         function addModules( $modules ) {
 325                 $this->mModules = array_merge( $this->mModules, (array) $modules );
 326         }
 327
 328         /**
 329          * Override the title to be used for display
 330          * -- this is assumed to have been validated
 331          * (check equal normalisation, etc.)
 332          *
 333          * @param $text String: desired title text
 334          */
 335         public function setDisplayTitle( $text ) {
 336                 $this->setTitleText( $text );
 337                 $this->setProperty( 'displaytitle', $text );
 338         }
 339
 340         /**
 341          * Get the title to be used for display
 342          *
 343          * @return String
 344          */
 345         public function getDisplayTitle() {
 346                 $t = $this->getTitleText();
 347                 if( $t === '' ) {
 348                         return false;
 349                 }
 350                 return $t;
 351         }
 352
 353         /**
 354          * Fairly generic flag setter thingy.
 355          */
 356         public function setFlag( $flag ) {
 357                 $this->mFlags[$flag] = true;
 358         }
 359
 360         public function getFlag( $flag ) {
 361                 return isset( $this->mFlags[$flag] );
 362         }
 363
 364         /**
 365          * Set a property to be cached in the DB
 366          */
 367         public function setProperty( $name, $value ) {
 368                 $this->mProperties[$name] = $value;
 369         }
 370
 371         public function getProperty( $name ){
 372                 return isset( $this->mProperties[$name] ) ? $this->mProperties[$name] : false;
 373         }
 374
 375         public function getProperties() {
 376                 if ( !isset( $this->mProperties ) ) {
 377                         $this->mProperties = array();
 378                 }
 379                 return $this->mProperties;
 380         }
 381
 382
 383         /**
 384          * Returns the options from its ParserOptions which have been taken
 385          * into account to produce this output or false if not available.
 386          * @return mixed Array/false
 387          */
 388          public function getUsedOptions() {
 389                 if ( !isset( $this->mAccessedOptions ) ) {
 390                         return false;
 391                 }
 392                 return array_keys( $this->mAccessedOptions );
 393          }
 394
 395          /**
 396           * Callback passed by the Parser to the ParserOptions to keep track of which options are used.
 397           * @access private
 398           */
 399          function recordOption( $option ) {
 400                  $this->mAccessedOptions[$option] = true;
 401          }
 402 }