ApiQueryQueryPage.php

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<?php
class ApiQueryQueryPage extends ApiQueryGeneratorBase {
    private $qpMap;

    public function __construct( ApiQuery $query, $moduleName ) {
        parent::__construct( $query, $moduleName, 'qp' );
        // Build mapping from special page names to QueryPage classes
        $uselessQueryPages = $this->getConfig()->get( 'APIUselessQueryPages' );
        $this->qpMap = [];
        foreach ( QueryPage::getPages() as $page ) {
            if ( !in_array( $page[1], $uselessQueryPages ) ) {
                $this->qpMap[$page[1]] = $page[0];
            }
        }
    }

    public function execute() {
        $this->run();
    }

    public function executeGenerator( $resultPageSet ) {
        $this->run( $resultPageSet );
    }

    public function run( $resultPageSet = null ) {
        $params = $this->extractRequestParams();
        $result = $this->getResult();

        $qp = new $this->qpMap[$params['page']]();
        if ( !$qp->userCanExecute( $this->getUser() ) ) {
            $this->dieUsageMsg( 'specialpage-cantexecute' );
        }

        $r = [ 'name' => $params['page'] ];
        if ( $qp->isCached() ) {
            if ( !$qp->isCacheable() ) {
                $r['disabled'] = true;
            } else {
                $r['cached'] = true;
                $ts = $qp->getCachedTimestamp();
                if ( $ts ) {
                    $r['cachedtimestamp'] = wfTimestamp( TS_ISO_8601, $ts );
                }
                $r['maxresults'] = $this->getConfig()->get( 'QueryCacheLimit' );
            }
        }
        $result->addValue( [ 'query' ], $this->getModuleName(), $r );

        if ( $qp->isCached() && !$qp->isCacheable() ) {
            // Disabled query page, don't run the query
            return;
        }

        $res = $qp->doQuery( $params['offset'], $params['limit'] + 1 );
        $count = 0;
        $titles = [];
        foreach ( $res as $row ) {
            if ( ++$count > $params['limit'] ) {
                // We've had enough
                $this->setContinueEnumParameter( 'offset', $params['offset'] + $params['limit'] );
                break;
            }

            $title = Title::makeTitle( $row->namespace, $row->title );
            if ( is_null( $resultPageSet ) ) {
                $data = [ 'value' => $row->value ];
                if ( $qp->usesTimestamps() ) {
                    $data['timestamp'] = wfTimestamp( TS_ISO_8601, $row->value );
                }
                self::addTitleInfo( $data, $title );

                foreach ( $row as $field => $value ) {
                    if ( !in_array( $field, [ 'namespace', 'title', 'value', 'qc_type' ] ) ) {
                        $data['databaseResult'][$field] = $value;
                    }
                }

                $fit = $result->addValue( [ 'query', $this->getModuleName(), 'results' ], null, $data );
                if ( !$fit ) {
                    $this->setContinueEnumParameter( 'offset', $params['offset'] + $count - 1 );
                    break;
                }
            } else {
                $titles[] = $title;
            }
        }
        if ( is_null( $resultPageSet ) ) {
            $result->addIndexedTagName(
                [ 'query', $this->getModuleName(), 'results' ],
                'page'
            );
        } else {
            $resultPageSet->populateFromTitles( $titles );
        }
    }

    public function getCacheMode( $params ) {
        $qp = new $this->qpMap[$params['page']]();
        if ( $qp->getRestriction() != '' ) {
            return 'private';
        }

        return 'public';
    }

    public function getAllowedParams() {
        return [
            'page' => [
                ApiBase::PARAM_TYPE => array_keys( $this->qpMap ),
                ApiBase::PARAM_REQUIRED => true
            ],
            'offset' => [
                ApiBase::PARAM_DFLT => 0,
                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
            ],
            'limit' => [
                ApiBase::PARAM_DFLT => 10,
                ApiBase::PARAM_TYPE => 'limit',
                ApiBase::PARAM_MIN => 1,
                ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
                ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
            ],
        ];
    }

    protected function getExamplesMessages() {
        return [
            'action=query&list=querypage&qppage=Ancientpages'
                => 'apihelp-query+querypage-example-ancientpages',
        ];
    }

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