<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2021 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\WebSocket;

use Espo\Core\InjectableFactory;
use Espo\Core\Utils\Config;
use Espo\Core\Utils\Metadata;
use Espo\Core\Binding\Factory;
use Espo\Core\Exceptions\Error;

class SubscriberFactory implements Factory
{
    private $injectableFactory;

    private $config;

    private $metadata;

    private const DEFAULT_MESSAGER = 'ZeroMQ';

    public function __construct(InjectableFactory $injectableFactory, Config $config, Metadata $metadata)
    {
        $this->injectableFactory = $injectableFactory;
        $this->config = $config;
        $this->metadata = $metadata;
    }

    public function create(): Subscriber
    {
        $messager = $this->config->get('webSocketMessager') ?? self::DEFAULT_MESSAGER;

        $className = $this->metadata->get(['app', 'webSocket', 'messagers', $messager, 'subscriberClassName']);

        if (!$className) {
            throw new Error("No subscriber for messager '{$messager}'.");
        }

        return $this->injectableFactory->create($className);
    }
}