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 {
 105         var $mText,                       # The output text
 106                 $mLanguageLinks,              # List of the full text of language links, in the order they appear
 107                 $mCategories,                 # Map of category names to sort keys
 108                 $mTitleText,                  # title text of the chosen language variant
 109                 $mLinks = array(),            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
 110                 $mTemplates = array(),        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
 111                 $mTemplateIds = array(),      # 2-D map of NS/DBK to rev ID for the template references. ID=zero for broken.
 112                 $mImages = array(),           # DB keys of the images used, in the array key only
 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                 $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                 $mProperties = array(),       # Name/value pairs to be cached in the DB
 123                 $mTOCHTML = '';               # HTML of the TOC
 124         private $mIndexPolicy = '';           # 'index' or 'noindex'?  Any other value will result in no change.
 125
 126         function __construct( $text = '', $languageLinks = array(), $categoryLinks = array(),
 127                 $containsOldMagic = false, $titletext = '' )
 128         {
 129                 $this->mText = $text;
 130                 $this->mLanguageLinks = $languageLinks;
 131                 $this->mCategories = $categoryLinks;
 132                 $this->mContainsOldMagic = $containsOldMagic;
 133                 $this->mTitleText = $titletext;
 134         }
 135
 136         function getText()                   { return $this->mText; }
 137         function &getLanguageLinks()         { return $this->mLanguageLinks; }
 138         function getInterwikiLinks()         { return $this->mInterwikiLinks; }
 139         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
 140         function &getCategories()            { return $this->mCategories; }
 141         function getTitleText()              { return $this->mTitleText; }
 142         function getSections()               { return $this->mSections; }
 143         function &getLinks()                 { return $this->mLinks; }
 144         function &getTemplates()             { return $this->mTemplates; }
 145         function &getImages()                { return $this->mImages; }
 146         function &getExternalLinks()         { return $this->mExternalLinks; }
 147         function getNoGallery()              { return $this->mNoGallery; }
 148         function getHeadItems()              { return $this->mHeadItems; }
 149         function getSubtitle()               { return $this->mSubtitle; }
 150         function getOutputHooks()            { return (array)$this->mOutputHooks; }
 151         function getWarnings()               { return array_keys( $this->mWarnings ); }
 152         function getIndexPolicy()            { return $this->mIndexPolicy; }
 153         function getTOCHTML()                { return $this->mTOCHTML; }
 154
 155         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
 156         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
 157         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
 158
 159         function setTitleText( $t )          { return wfSetVar( $this->mTitleText, $t ); }
 160         function setSections( $toc )         { return wfSetVar( $this->mSections, $toc ); }
 161         function setIndexPolicy( $policy )   { return wfSetVar( $this->mIndexPolicy, $policy ); }
 162         function setTOCHTML( $tochtml )      { return wfSetVar( $this->mTOCHTML, $tochtml ); }
 163
 164         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
 165         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
 166         function addWarning( $s )            { $this->mWarnings[$s] = 1; }
 167
 168         function addOutputHook( $hook, $data = false ) {
 169                 $this->mOutputHooks[] = array( $hook, $data );
 170         }
 171
 172         function setNewSection( $value ) {
 173                 $this->mNewSection = (bool)$value;
 174         }
 175         function hideNewSection ( $value ) {
 176                 $this->mHideNewSection = (bool)$value;
 177         }
 178         function getHideNewSection () {
 179                 return (bool)$this->mHideNewSection;
 180         }
 181         function getNewSection() {
 182                 return (bool)$this->mNewSection;
 183         }
 184
 185         function addExternalLink( $url ) {
 186                 # We don't register links pointing to our own server, unless... :-)
 187                 global $wgServer, $wgRegisterInternalExternals;
 188                 if( $wgRegisterInternalExternals or stripos($url,$wgServer.'/')!==0)
 189                         $this->mExternalLinks[$url] = 1;
 190         }
 191
 192         /**
 193          * Record a local or interwiki inline link for saving in future link tables.
 194          *
 195          * @param $title Title object
 196          * @param $id Mixed: optional known page_id so we can skip the lookup
 197          */
 198         function addLink( $title, $id = null ) {
 199                 if ( $title->isExternal() ) {
 200                         // Don't record interwikis in pagelinks
 201                         $this->addInterwikiLink( $title );
 202                         return;
 203                 }
 204                 $ns = $title->getNamespace();
 205                 $dbk = $title->getDBkey();
 206                 if ( $ns == NS_MEDIA ) {
 207                         // Normalize this pseudo-alias if it makes it down here...
 208                         $ns = NS_FILE;
 209                 } elseif( $ns == NS_SPECIAL ) {
 210                         // We don't record Special: links currently
 211                         // It might actually be wise to, but we'd need to do some normalization.
 212                         return;
 213                 } elseif( $dbk === '' ) {
 214                         // Don't record self links -  [[#Foo]]
 215                         return;
 216                 }
 217                 if ( !isset( $this->mLinks[$ns] ) ) {
 218                         $this->mLinks[$ns] = array();
 219                 }
 220                 if ( is_null( $id ) ) {
 221                         $id = $title->getArticleID();
 222                 }
 223                 $this->mLinks[$ns][$dbk] = $id;
 224         }
 225
 226         function addImage( $name ) {
 227                 $this->mImages[$name] = 1;
 228         }
 229
 230         function addTemplate( $title, $page_id, $rev_id ) {
 231                 $ns = $title->getNamespace();
 232                 $dbk = $title->getDBkey();
 233                 if ( !isset( $this->mTemplates[$ns] ) ) {
 234                         $this->mTemplates[$ns] = array();
 235                 }
 236                 $this->mTemplates[$ns][$dbk] = $page_id;
 237                 if ( !isset( $this->mTemplateIds[$ns] ) ) {
 238                         $this->mTemplateIds[$ns] = array();
 239                 }
 240                 $this->mTemplateIds[$ns][$dbk] = $rev_id; // For versioning
 241         }
 242
 243         /**
 244          * @param $title Title object, must be an interwiki link
 245          * @throws MWException if given invalid input
 246          */
 247         function addInterwikiLink( $title ) {
 248                 $prefix = $title->getInterwiki();
 249                 if( $prefix == '' ) {
 250                         throw new MWException( 'Non-interwiki link passed, internal parser error.' );
 251                 }
 252                 if (!isset($this->mInterwikiLinks[$prefix])) {
 253                         $this->mInterwikiLinks[$prefix] = array();
 254                 }
 255                 $this->mInterwikiLinks[$prefix][$title->getDBkey()] = 1;
 256         }
 257
 258         /**
 259          * Add some text to the <head>.
 260          * If $tag is set, the section with that tag will only be included once
 261          * in a given page.
 262          */
 263         function addHeadItem( $section, $tag = false ) {
 264                 if ( $tag !== false ) {
 265                         $this->mHeadItems[$tag] = $section;
 266                 } else {
 267                         $this->mHeadItems[] = $section;
 268                 }
 269         }
 270
 271         /**
 272          * Override the title to be used for display
 273          * -- this is assumed to have been validated
 274          * (check equal normalisation, etc.)
 275          *
 276          * @param $text String: desired title text
 277          */
 278         public function setDisplayTitle( $text ) {
 279                 $this->setTitleText( $text );
 280                 $this->setProperty( 'displaytitle', $text );
 281         }
 282
 283         /**
 284          * Get the title to be used for display
 285          *
 286          * @return String
 287          */
 288         public function getDisplayTitle() {
 289                 $t = $this->getTitleText( );
 290                 if( $t === '' ) {
 291                         return false;
 292                 }
 293                 return $t;
 294         }
 295
 296         /**
 297          * Fairly generic flag setter thingy.
 298          */
 299         public function setFlag( $flag ) {
 300                 $this->mFlags[$flag] = true;
 301         }
 302
 303         public function getFlag( $flag ) {
 304                 return isset( $this->mFlags[$flag] );
 305         }
 306
 307         /**
 308          * Set a property to be cached in the DB
 309          */
 310         public function setProperty( $name, $value ) {
 311                 $this->mProperties[$name] = $value;
 312         }
 313
 314         public function getProperty( $name ){
 315                 return isset( $this->mProperties[$name] ) ? $this->mProperties[$name] : false;
 316         }
 317
 318         public function getProperties() {
 319                 if ( !isset( $this->mProperties ) ) {
 320                         $this->mProperties = array();
 321                 }
 322                 return $this->mProperties;
 323         }
 324 }