<?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\Utils\File;

use Espo\Core\Utils\Util;
use Espo\Core\Utils\Json;
use Espo\Core\Utils\File\Manager;
use Espo\Core\Utils\Metadata;

class FileUnifier
{
    private $fileManager;

    private $metadata;

    public function __construct(Manager $fileManager, ?Metadata $metadata = null)
    {
        $this->fileManager = $fileManager;
        $this->metadata = $metadata;
    }

    /**
     * Unite files content.
     *
     * @param array $paths
     * @param bool $returnModuleNames If need to return data with module names.
     *
     * @return array
     */
    public function unify(array $paths, bool $returnModuleNames = false): array
    {
        $data = $this->loadData($paths['corePath']);

        if (!empty($paths['modulePath'])) {
            $moduleDir = strstr($paths['modulePath'], '{*}', true);

            $moduleList = isset($this->metadata) ?
                $this->metadata->getModuleList() :
                $this->fileManager->getFileList($moduleDir, false, '', false);

            foreach ($moduleList as $moduleName) {
                $moduleFilePath = str_replace('{*}', $moduleName, $paths['modulePath']);

                if ($returnModuleNames) {
                    if (!isset($data[$moduleName])) {
                        $data[$moduleName] = [];
                    }

                    $data[$moduleName] = Util::merge(
                        $data[$moduleName],
                        $this->loadData($moduleFilePath)
                    );

                    continue;
                }

                $data = Util::merge(
                    $data,
                    $this->loadData($moduleFilePath)
                );
            }
        }

        if (!empty($paths['customPath'])) {
            $data = Util::merge(
                $data,
                $this->loadData($paths['customPath'])
            );
        }

        return $data;
    }

    /**
     * Load data from a file.
     *
     * @param string $filePath
     * @param array $returns
     * @return array
     */
    protected function loadData(string $filePath): array
    {
        if (!$this->fileManager->isFile($filePath)) {
             return [];
        }

        $content = $this->fileManager->getContents($filePath);

        return Json::decode($content, true);
    }
}