<?php
/**
 * Implements Special:Userbyid
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup SpecialPage
 */

/**
 * A special page that redirects to the User corresponding to a given
 * numeric user id.
 *
 * @ingroup SpecialPage
 */
class SpecialUserbyid extends FormSpecialPage {
    function __construct() {
        parent::__construct( 'Userbyid', 'read' );
    }

    function getFormFields() {
        return array(
            'UserID' => array(
                'type' => 'text',
                'label-message' => 'userbyid-page',
                'default' => $this->par,
                'required' => true,
                'validation-callback' => 'ctype_digit'
            )
        );
    }

    function alterForm( HTMLForm $form ) {
        $form->setMethod( 'get' );
    }

    function onSubmit( array $data ) {
        $user = User::newFromId( (int)$data['UserID'] );
        if ( $user->isAnon() ) {
            $this->getOutput()->setStatusCode( 404 );
        } else {
            $this->getOutput()->redirect( $user->getUserPage()->getFullURL() );
        }
    }

    protected function getGroupName() {
        return 'users';
    }
}