SpecialWantedTemplates.php

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<?php
use MediaWiki\Cache\LinkBatchFactory;
use Wikimedia\Rdbms\ILoadBalancer;
 
class SpecialWantedTemplates extends WantedQueryPage {
 
    public function __construct(
        ILoadBalancer $loadBalancer,
        LinkBatchFactory $linkBatchFactory
    ) {
        parent::__construct( 'Wantedtemplates' );
        $this->setDBLoadBalancer( $loadBalancer );
        $this->setLinkBatchFactory( $linkBatchFactory );
    }
 
    public function getQueryInfo() {
        return [
            'tables' => [ 'templatelinks', 'page' ],
            'fields' => [
                'namespace' => 'tl_namespace',
                'title' => 'tl_title',
                'value' => 'COUNT(*)'
            ],
            'conds' => [
                'page_title IS NULL',
                'tl_namespace' => NS_TEMPLATE
            ],
            'options' => [ 'GROUP BY' => [ 'tl_namespace', 'tl_title' ] ],
            'join_conds' => [ 'page' => [ 'LEFT JOIN',
                [ 'page_namespace = tl_namespace',
                    'page_title = tl_title' ] ] ]
        ];
    }
 
    protected function getGroupName() {
        return 'maintenance';
    }
}