ApiQueryQueryPage.php

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<?php
namespace MediaWiki\Api;
 
use MediaWiki\MainConfigNames;
use MediaWiki\SpecialPage\QueryPage;
use MediaWiki\SpecialPage\SpecialPageFactory;
use MediaWiki\Title\Title;
use Wikimedia\ParamValidator\ParamValidator;
use Wikimedia\ParamValidator\TypeDef\IntegerDef;
use Wikimedia\Timestamp\TimestampFormat as TS;
 
class ApiQueryQueryPage extends ApiQueryGeneratorBase {
 
    private $queryPages;
 
    public function __construct(
        ApiQuery $query,
        string $moduleName,
        private readonly SpecialPageFactory $specialPageFactory,
    ) {
        parent::__construct( $query, $moduleName, 'qp' );
        $this->queryPages = array_values( array_diff(
            array_column( QueryPage::getPages(), 1 ), // [ class, name ]
            $this->getConfig()->get( MainConfigNames::APIUselessQueryPages )
        ) );
    }
 
    public function execute() {
        $this->run();
    }
 
    public function executeGenerator( $resultPageSet ) {
        $this->run( $resultPageSet );
    }
 
    private function getSpecialPage( $name ): QueryPage {
        $qp = $this->specialPageFactory->getPage( $name );
        if ( !$qp ) {
            self::dieDebug(
                __METHOD__,
                'SpecialPageFactory failed to create special page ' . $name
            );
        }
        if ( !( $qp instanceof QueryPage ) ) {
            self::dieDebug(
                __METHOD__,
                'Special page ' . $name . ' is not a QueryPage'
            );
        }
        return $qp;
    }
 
    public function run( $resultPageSet = null ) {
        $params = $this->extractRequestParams();
        $result = $this->getResult();
 
        $qp = $this->getSpecialPage( $params['page'] );
        if ( !$qp->userCanExecute( $this->getUser() ) ) {
            $this->dieWithError( 'apierror-specialpage-cantexecute' );
        }
 
        if ( $resultPageSet === null ) {
            $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( MainConfigNames::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 ( $resultPageSet === null ) {
                $data = [];
                if ( isset( $row->value ) ) {
                    $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 ( $resultPageSet === null ) {
            $result->addIndexedTagName(
                [ 'query', $this->getModuleName(), 'results' ],
                'page'
            );
        } else {
            $resultPageSet->populateFromTitles( $titles );
        }
    }
 
    public function getCacheMode( $params ) {
        $qp = $this->getSpecialPage( $params['page'] );
        if ( $qp->getRestriction() != '' ) {
            return 'private';
        }
 
        return 'public';
    }
 
    public function getAllowedParams() {
        return [
            'page' => [
                ParamValidator::PARAM_TYPE => $this->queryPages,
                ParamValidator::PARAM_REQUIRED => true
            ],
            'offset' => [
                ParamValidator::PARAM_DEFAULT => 0,
                ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
            ],
            'limit' => [
                ParamValidator::PARAM_DEFAULT => 10,
                ParamValidator::PARAM_TYPE => 'limit',
                IntegerDef::PARAM_MIN => 1,
                IntegerDef::PARAM_MAX => ApiBase::LIMIT_BIG1,
                IntegerDef::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/Special:MyLanguage/API:Querypage';
    }
}
 
class_alias( ApiQueryQueryPage::class, 'ApiQueryQueryPage' );