ApiQueryCategoryList.php

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<?php
 
namespace MediaWiki\Api;
 
use MediaWiki\Title\Title;
use Wikimedia\Rdbms\IExpression;
use Wikimedia\Rdbms\IReadableDatabase;
use Wikimedia\Rdbms\LikeValue;
 
abstract class ApiQueryCategoryList extends ApiQueryGeneratorBase {
 
    protected function createQuery( IReadableDatabase $db, array $params ): void {
        $this->addTables( 'category' );
        $this->addFields( 'cat_title' );
 
        if ( $params['continue'] !== null ) {
            $cont = $this->parseContinueParamOrDie( $params['continue'], [ 'string' ] );
            $op = $params['dir'] == 'descending' ? '<=' : '>=';
            $this->addWhere( $db->expr( 'cat_title', $op, $cont[0] ) );
        }
 
        $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
        $from = ( $params['from'] === null
            ? null
            : $this->titlePartToKey( $params['from'], NS_CATEGORY ) );
        $to = ( $params['to'] === null
            ? null
            : $this->titlePartToKey( $params['to'], NS_CATEGORY ) );
        $this->addWhereRange( 'cat_title', $dir, $from, $to );
 
        $min = $params['min'];
        $max = $params['max'];
        if ( $dir == 'newer' ) {
            $this->addWhereRange( 'cat_pages', 'newer', $min, $max );
        } else {
            $this->addWhereRange( 'cat_pages', 'older', $max, $min );
        }
 
        if ( isset( $params['prefix'] ) ) {
            $this->addWhere(
                $db->expr(
                    'cat_title',
                    IExpression::LIKE,
                    new LikeValue( $this->titlePartToKey( $params['prefix'], NS_CATEGORY ), $db->anyString() )
                )
            );
        }
 
        $this->addOption( 'LIMIT', $params['limit'] + 1 );
        $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
        $this->addOption( 'ORDER BY', 'cat_title' . $sort );
 
        $prop = array_fill_keys( $params['prop'], true );
        $this->addFieldsIf( [ 'cat_pages', 'cat_subcats', 'cat_files' ], isset( $prop['size'] ) );
        if ( isset( $prop['hidden'] ) ) {
            $this->addTables( [ 'page', 'page_props' ] );
            $this->addJoinConds( [
                'page' => [ 'LEFT JOIN', [
                    'page_namespace' => NS_CATEGORY,
                    'page_title=cat_title' ] ],
                'page_props' => [ 'LEFT JOIN', [
                    'pp_page=page_id',
                    'pp_propname' => 'hiddencat' ] ],
            ] );
            $this->addFields( [ 'cat_hidden' => 'pp_propname' ] );
        }
    }
 
    protected function executeQuery( array $params, ?ApiPageSet $resultPageSet = null, array $options = [] ) {
        $res = $this->select( __METHOD__ );
        $pages = [];
 
        $result = $this->getResult();
        $count = 0;
        foreach ( $res as $row ) {
            if ( ++$count > $params['limit'] ) {
                // We've reached the one extra which shows that there are
                // additional cats to be had. Stop here...
                $this->setContinueEnumParameter( 'continue', $row->cat_title );
                break;
            }
 
            // Normalize titles
            $titleObj = Title::makeTitle( NS_CATEGORY, $row->cat_title );
            if ( $resultPageSet !== null ) {
                $pages[] = $titleObj;
            } else {
                $item = [];
                ApiResult::setContentValue( $item, 'category', $titleObj->getText() );
                $prop = array_fill_keys( $params['prop'], true );
                if ( isset( $prop['size'] ) ) {
                    $item['size'] = (int)$row->cat_pages;
                    $item['pages'] = $row->cat_pages - $row->cat_subcats - $row->cat_files;
                    $item['files'] = (int)$row->cat_files;
                    $item['subcats'] = (int)$row->cat_subcats;
                }
                if ( isset( $prop['hidden'] ) ) {
                    $item['hidden'] = (bool)$row->cat_hidden;
                }
                if ( isset( $options['catNames'] ) ) {
                    $catNameList = $options['catNames'];
                    $item['catid'] = $catNameList[ $titleObj->getDBkey() ];
                }
                $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $item );
                if ( !$fit ) {
                    $this->setContinueEnumParameter( 'continue', $row->cat_title );
                    break;
                }
            }
        }
 
        if ( $resultPageSet === null ) {
            $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'c' );
        } else {
            $resultPageSet->populateFromTitles( $pages );
        }
    }
}