<?php

/*
 * This file is part of the Access to Memory (AtoM) software.
 *
 * Access to Memory (AtoM) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Access to Memory (AtoM) 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 Access to Memory (AtoM).  If not, see <http://www.gnu.org/licenses/>.
 */

class qtSwordPluginHttpAuthFilter extends sfFilter
{
    public function execute($filterChain)
    {
        if ($this->isFirstCall()) {
            if (!isset($_SERVER['PHP_AUTH_USER'])) {
                $this->sendHeaders();

                exit;
            }

            $authenticated = sfContext::getInstance()->user->authenticateWithBasicAuth($_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW']);

            if (!$authenticated) {
                $this->sendHeaders();

                return;
            }
        }

        $filterChain->execute();
    }

    private function sendHeaders()
    {
        header('WWW-Authenticate: Basic realm="Secure area"');
        header('HTTP/1.0 401 Unauthorized');
    }
}
