SpecialCategories.php

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<?php
use MediaWiki\Cache\LinkBatchFactory;
use MediaWiki\Html\Html;
use Wikimedia\Rdbms\ILoadBalancer;
 
class SpecialCategories extends SpecialPage {
 
    private $linkBatchFactory;
 
    private $loadBalancer;
 
    public function __construct(
        LinkBatchFactory $linkBatchFactory,
        ILoadBalancer $loadBalancer
    ) {
        parent::__construct( 'Categories' );
        $this->linkBatchFactory = $linkBatchFactory;
        $this->loadBalancer = $loadBalancer;
    }
 
    public function execute( $par ) {
        $this->setHeaders();
        $this->outputHeader();
        $this->addHelpLink( 'Help:Categories' );
        $this->getOutput()->setPreventClickjacking( false );
 
        $from = $this->getRequest()->getText( 'from', $par ?? '' );
 
        $cap = new CategoryPager(
            $this->getContext(),
            $this->linkBatchFactory,
            $this->getLinkRenderer(),
            $this->loadBalancer,
            $from
        );
        $cap->doQuery();
 
        $this->getOutput()->addHTML(
            Html::openElement( 'div', [ 'class' => 'mw-spcontent' ] ) .
                $this->msg( 'categoriespagetext', $cap->getNumRows() )->parseAsBlock() .
                $cap->getStartForm( $from ) .
                $cap->getNavigationBar() .
                '<ul>' . $cap->getBody() . '</ul>' .
                $cap->getNavigationBar() .
                Html::closeElement( 'div' )
        );
    }
 
    protected function getGroupName() {
        return 'pages';
    }
}