<?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\Services;

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

class AdminNotifications implements

    Di\EntityManagerAware
{
    use Di\EntityManagerSetter;

    protected $config;

    protected $configWriter;

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

    /**
     * Job for checking a new version of EspoCRM.
     */
    public function jobCheckNewVersion()
    {
        $config = $this->config;

        if (!$config->get('adminNotifications') || !$config->get('adminNotificationsNewVersion')) {
            return true;
        }

        $latestRelease = $this->getLatestRelease();

        if (empty($latestRelease['version'])) {
            $this->configWriter->set('latestVersion', $latestRelease['version']);

            $this->configWriter->save();

            return true;
        }

        if ($config->get('latestVersion') != $latestRelease['version']) {
            $this->configWriter->set('latestVersion', $latestRelease['version']);

            if (!empty($latestRelease['notes'])) {
                // @todo Create a notification.
            }

            $this->configWriter->save();

            return true;
        }

        if (!empty($latestRelease['notes'])) {
            // @todo Find and modify notification.
        }

        return true;
    }

    /**
     * Job for checking a new version of installed extensions.
     */
    public function jobCheckNewExtensionVersion()
    {
        $config = $this->config;

        if (!$config->get('adminNotifications') || !$config->get('adminNotificationsNewExtensionVersion')) {
            return true;
        }

        $query = $this->entityManager->getQueryBuilder()
            ->select()
            ->from('Extension')
            ->select(['id', 'name', 'version', 'checkVersionUrl'])
            ->where([
                'deleted' => false,
                'isInstalled' => true,
            ])
            ->order(['createdAt'])
            ->build();

        $sth = $this->entityManager->getQueryExecutor()->execute($query);

        $latestReleases = [];

        while ($row = $sth->fetch()) {
            $url = !empty($row['checkVersionUrl']) ? $row['checkVersionUrl'] : null;

            $extensionName = $row['name'];

            $latestRelease = $this->getLatestRelease($url, [
                'name' => $extensionName,
            ]);

            if (!empty($latestRelease) && !isset($latestRelease['error'])) {
                $latestReleases[$extensionName] = $latestRelease;
            }
        }

        $latestExtensionVersions = $config->get('latestExtensionVersions', []);

        $save = false;

        foreach ($latestReleases as $extensionName => $extensionData) {

            if (empty($latestExtensionVersions[$extensionName])) {
                $latestExtensionVersions[$extensionName] = $extensionData['version'];
                $save = true;

                continue;
            }

            if ($latestExtensionVersions[$extensionName] != $extensionData['version']) {
                $latestExtensionVersions[$extensionName] = $extensionData['version'];

                if (!empty($extensionData['notes'])) {
                    //todo: create notification
                }

                $save = true;

                continue;
            }

            if (!empty($extensionData['notes'])) {
                //todo: find and modify notification
            }
        }

        if ($save) {
            $this->configWriter->set('latestExtensionVersions', $latestExtensionVersions);

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

        return true;
    }

    protected function getLatestRelease(
        ?string $url = null,
        array $requestData = [],
        string $urlPath = 'release/latest'
    ): ?array {

        if (!function_exists('curl_version')) {
            return null;
        }

        $ch = curl_init();

        $requestUrl = $url ? trim($url) : base64_decode('aHR0cHM6Ly9zLmVzcG9jcm0uY29tLw==');
        $requestUrl = (substr($requestUrl, -1) == '/') ? $requestUrl : $requestUrl . '/';

        $requestUrl .= empty($requestData) ?
            $urlPath . '/' :
            $urlPath . '/?' . http_build_query($requestData);

        curl_setopt($ch, CURLOPT_URL, $requestUrl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 60);

        $result = curl_exec($ch);

        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

        curl_close($ch);

        if ($httpCode !== 200) {
            return null;
        }

        $data = json_decode($result, true);

        if (!is_array($data)) {
            return null;
        }

        return $data;
    }
}