<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2022 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\Core\Utils;

use Espo\Core\{
    Utils\Config,
    Utils\Config\ConfigWriter,
};

class ApiKey
{
    private $config;

    private $configWriter;

    public function __construct(Config $config, ConfigWriter $configWriter)
    {
        $this->config = $config;
        $this->configWriter = $configWriter;
    }

    public static function hash(string $secretKey, string $string = ''): string
    {
        return hash_hmac('sha256', $string, $secretKey, true);
    }

    public function getSecretKeyForUserId(string $id): ?string
    {
        $apiSecretKeys = $this->config->get('apiSecretKeys');

        if (!$apiSecretKeys) {
            return null;
        }

        if (!is_object($apiSecretKeys)) {
            return null;
        }

        if (!isset($apiSecretKeys->$id)) {
            return null;
        }

        return $apiSecretKeys->$id;
    }

    public function storeSecretKeyForUserId(string $id, string $secretKey): void
    {
        $apiSecretKeys = $this->config->get('apiSecretKeys');

        if (!is_object($apiSecretKeys)) {
            $apiSecretKeys = (object) [];
        }

        $apiSecretKeys->$id = $secretKey;

        $this->configWriter->set('apiSecretKeys', $apiSecretKeys);

        $this->configWriter->save();
    }

    public function removeSecretKeyForUserId(string $id): void
    {
        $apiSecretKeys = $this->config->get('apiSecretKeys');

        if (!is_object($apiSecretKeys)) {
            $apiSecretKeys = (object) [];
        }

        unset($apiSecretKeys->$id);

        $this->configWriter->set('apiSecretKeys', $apiSecretKeys);

        $this->configWriter->save();
    }
}