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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
class PoolWorkArticleView extends PoolCounterWork {
/** @var Page */
private $page;
/** @var string */
private $cacheKey;
/** @var int */
private $revid;
/** @var ParserOptions */
private $parserOptions;
/** @var Content|null */
private $content = null;
/** @var ParserOutput|bool */
private $parserOutput = false;
/** @var bool */
private $isDirty = false;
/** @var Status|bool */
private $error = false;
/**
* @param Page $page
* @param ParserOptions $parserOptions ParserOptions to use for the parse
* @param int $revid ID of the revision being parsed.
* @param bool $useParserCache Whether to use the parser cache.
* operation.
* @param Content|string $content Content to parse or null to load it; may
* also be given as a wikitext string, for BC.
*/
public function __construct( Page $page, ParserOptions $parserOptions,
$revid, $useParserCache, $content = null
) {
if ( is_string( $content ) ) { // BC: old style call
$modelId = $page->getRevision()->getContentModel();
$format = $page->getRevision()->getContentFormat();
$content = ContentHandler::makeContent( $content, $page->getTitle(), $modelId, $format );
}
$this->page = $page;
$this->revid = $revid;
$this->cacheable = $useParserCache;
$this->parserOptions = $parserOptions;
$this->content = $content;
$this->cacheKey = ParserCache::singleton()->getKey( $page, $parserOptions );
$keyPrefix = $this->cacheKey ?: wfMemcKey( 'articleview', 'missingcachekey' );
parent::__construct( 'ArticleView', $keyPrefix . ':revid:' . $revid );
}
/**
* Get the ParserOutput from this object, or false in case of failure
*
* @return ParserOutput
*/
public function getParserOutput() {
return $this->parserOutput;
}
/**
* Get whether the ParserOutput is a dirty one (i.e. expired)
*
* @return bool
*/
public function getIsDirty() {
return $this->isDirty;
}
/**
* Get a Status object in case of error or false otherwise
*
* @return Status|bool
*/
public function getError() {
return $this->error;
}
/**
* @return bool
*/
public function doWork() {
global $wgUseFileCache;
// @todo several of the methods called on $this->page are not declared in Page, but present
// in WikiPage and delegated by Article.
$isCurrent = $this->revid === $this->page->getLatest();
if ( $this->content !== null ) {
$content = $this->content;
} elseif ( $isCurrent ) {
// XXX: why use RAW audience here, and PUBLIC (default) below?
$content = $this->page->getContent( Revision::RAW );
} else {
$rev = Revision::newFromTitle( $this->page->getTitle(), $this->revid );
if ( $rev === null ) {
$content = null;
} else {
// XXX: why use PUBLIC audience here (default), and RAW above?
$content = $rev->getContent();
}
}
if ( $content === null ) {
return false;
}
// Reduce effects of race conditions for slow parses (bug 46014)
$cacheTime = wfTimestampNow();
$time = - microtime( true );
$this->parserOutput = $content->getParserOutput(
$this->page->getTitle(),
$this->revid,
$this->parserOptions
);
$time += microtime( true );
// Timing hack
if ( $time > 3 ) {
wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
$this->page->getTitle()->getPrefixedDBkey() ) );
}
if ( $this->cacheable && $this->parserOutput->isCacheable() && $isCurrent ) {
ParserCache::singleton()->save(
$this->parserOutput, $this->page, $this->parserOptions, $cacheTime, $this->revid );
}
// Make sure file cache is not used on uncacheable content.
// Output that has magic words in it can still use the parser cache
// (if enabled), though it will generally expire sooner.
if ( !$this->parserOutput->isCacheable() ) {
$wgUseFileCache = false;
}
if ( $isCurrent ) {
$this->page->triggerOpportunisticLinksUpdate( $this->parserOutput );
}
return true;
}
/**
* @return bool
*/
public function getCachedWork() {
$this->parserOutput = ParserCache::singleton()->get( $this->page, $this->parserOptions );
if ( $this->parserOutput === false ) {
wfDebug( __METHOD__ . ": parser cache miss\n" );
return false;
} else {
wfDebug( __METHOD__ . ": parser cache hit\n" );
return true;
}
}
/**
* @return bool
*/
public function fallback() {
$this->parserOutput = ParserCache::singleton()->getDirty( $this->page, $this->parserOptions );
if ( $this->parserOutput === false ) {
wfDebugLog( 'dirty', 'dirty missing' );
wfDebug( __METHOD__ . ": no dirty cache\n" );
return false;
} else {
wfDebug( __METHOD__ . ": sending dirty output\n" );
wfDebugLog( 'dirty', "dirty output {$this->cacheKey}" );
$this->isDirty = true;
return true;
}
}
/**
* @param Status $status
* @return bool
*/
public function error( $status ) {
$this->error = $status;
return false;
}
}
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