ApiPurge.php

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<?php

class ApiPurge extends ApiBase {
    private $mPageSet;

    public function execute() {
        $params = $this->extractRequestParams();

        $this->getResult()->beginContinuation( $params['continue'], array(), array() );

        $forceLinkUpdate = $params['forcelinkupdate'];
        $forceRecursiveLinkUpdate = $params['forcerecursivelinkupdate'];
        $pageSet = $this->getPageSet();
        $pageSet->execute();

        $result = $pageSet->getInvalidTitlesAndRevisions();

        foreach ( $pageSet->getGoodTitles() as $title ) {
            $r = array();
            ApiQueryBase::addTitleInfo( $r, $title );
            $page = WikiPage::factory( $title );
            $page->doPurge(); // Directly purge and skip the UI part of purge().
            $r['purged'] = '';

            if ( $forceLinkUpdate || $forceRecursiveLinkUpdate ) {
                if ( !$this->getUser()->pingLimiter( 'linkpurge' ) ) {
                    $popts = $page->makeParserOptions( 'canonical' );

                    # Parse content; note that HTML generation is only needed if we want to cache the result.
                    $content = $page->getContent( Revision::RAW );
                    $enableParserCache = $this->getConfig()->get( 'EnableParserCache' );
                    $p_result = $content->getParserOutput(
                        $title,
                        $page->getLatest(),
                        $popts,
                        $enableParserCache
                    );

                    # Update the links tables
                    $updates = $content->getSecondaryDataUpdates(
                        $title, null, $forceRecursiveLinkUpdate, $p_result );
                    DataUpdate::runUpdates( $updates );

                    $r['linkupdate'] = '';

                    if ( $enableParserCache ) {
                        $pcache = ParserCache::singleton();
                        $pcache->save( $p_result, $page, $popts );
                    }
                } else {
                    $error = $this->parseMsg( array( 'actionthrottledtext' ) );
                    $this->setWarning( $error['info'] );
                    $forceLinkUpdate = false;
                }
            }

            $result[] = $r;
        }
        $apiResult = $this->getResult();
        $apiResult->setIndexedTagName( $result, 'page' );
        $apiResult->addValue( null, $this->getModuleName(), $result );

        $values = $pageSet->getNormalizedTitlesAsResult( $apiResult );
        if ( $values ) {
            $apiResult->addValue( null, 'normalized', $values );
        }
        $values = $pageSet->getConvertedTitlesAsResult( $apiResult );
        if ( $values ) {
            $apiResult->addValue( null, 'converted', $values );
        }
        $values = $pageSet->getRedirectTitlesAsResult( $apiResult );
        if ( $values ) {
            $apiResult->addValue( null, 'redirects', $values );
        }

        $apiResult->endContinuation();
    }

    private function getPageSet() {
        if ( !isset( $this->mPageSet ) ) {
            $this->mPageSet = new ApiPageSet( $this );
        }

        return $this->mPageSet;
    }

    public function isWriteMode() {
        return true;
    }

    public function mustBePosted() {
        // Anonymous users are not allowed a non-POST request
        return !$this->getUser()->isAllowed( 'purge' );
    }

    public function getAllowedParams( $flags = 0 ) {
        $result = array(
            'forcelinkupdate' => false,
            'forcerecursivelinkupdate' => false,
            'continue' => '',
        );
        if ( $flags ) {
            $result += $this->getPageSet()->getFinalParams( $flags );
        }

        return $result;
    }

    public function getParamDescription() {
        return $this->getPageSet()->getFinalParamDescription()
            + array(
                'forcelinkupdate' => 'Update the links tables',
                'forcerecursivelinkupdate' => 'Update the links table, and update ' .
                    'the links tables for any page that uses this page as a template',
                'continue' => 'When more results are available, use this to continue',
            );
    }

    public function getDescription() {
        return array( 'Purge the cache for the given titles.',
            'Requires a POST request if the user is not logged in.'
        );
    }

    public function getExamples() {
        return array(
            'api.php?action=purge&titles=Main_Page|API' => 'Purge the "Main Page" and the "API" page',
        );
    }

    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/API:Purge';
    }
}