<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2023 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM 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 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM 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 EspoCRM. If not, see http://www.gnu.org/licenses/.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Tools\Api\Cors;

use Espo\Core\Utils\Config;
use Psr\Http\Message\RequestInterface as Request;

class DefaultHelper implements Helper
{
    public function __construct(private Config $config) {}

    public function isCredentialsAllowed(Request $request): bool
    {
        return true;
    }

    public function getAllowedOrigin(Request $request): ?string
    {
        $origin = $request->getHeaderLine('Origin');

        if (!$origin) {
            return null;
        }

        return in_array($origin, $this->getAllowedOrigins()) ?
            $origin :
            null;
    }

    public function getAllowedMethods(Request $request): array
    {
        return $this->config->get('apiCorsAllowedMethodList') ?? [];
    }

    public function getAllowedHeaders(Request $request): array
    {
        if (!$request->hasHeader('Access-Control-Request-Headers')) {
            return [];
        }

        return $this->config->get('apiCorsAllowedHeaderList') ?? [];
    }

    public function getSuccessStatus(): ?int
    {
        return null;
    }

    public function getMaxAge(): ?int
    {
        return $this->config->get('apiCorsMaxAge');
    }

    /**
     * @return string[]
     */
    private function getAllowedOrigins(): array
    {
        return $this->config->get('apiCorsAllowedOriginList') ?? [];
    }
}