owncloud/core

<?php
/**
 * @author Martin Mattel <martin.mattel@diemattels.at>
 * @author Robin Appelman <icewind@owncloud.com>
 * @author Stefan Weil <sw@weilnetz.de>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OC\Files\Storage\PolyFill;

trait CopyDirectory {
    /**
     * Check if a path is a directory
     *
     * @param string $path
     * @return bool
     */
    abstract public function is_dir($path);

    /**
     * Check if a file or folder exists
     *
     * @param string $path
     * @return bool
     */
    abstract public function file_exists($path);

    /**
     * Delete a file or folder
     *
     * @param string $path
     * @return bool
     */
    abstract public function unlink($path);

    /**
     * Open a directory handle for a folder
     *
     * @param string $path
     * @return resource | bool
     */
    abstract public function opendir($path);

    /**
     * Create a new folder
     *
     * @param string $path
     * @return bool
     */
    abstract public function mkdir($path);

    public function copy($source, $target) {
        if ($this->is_dir($source)) {
            if ($this->file_exists($target)) {
                $this->unlink($target);
            }
            $this->mkdir($target);
            return $this->copyRecursive($source, $target);
        } else {
            return parent::copy($source, $target);
        }
    }

    /**
     * For adapters that don't support copying folders natively
     *
     * @param $source
     * @param $target
     * @return bool
     */
    protected function copyRecursive($source, $target) {
        $dh = $this->opendir($source);
        $result = true;
        while ($file = \readdir($dh)) {
            if (!\OC\Files\Filesystem::isIgnoredDir($file)) {
                if ($this->is_dir($source . '/' . $file)) {
                    $this->mkdir($target . '/' . $file);
                    $result = $this->copyRecursive($source . '/' . $file, $target . '/' . $file);
                } else {
                    $result = parent::copy($source . '/' . $file, $target . '/' . $file);
                }
                if (!$result) {
                    break;
                }
            }
        }
        return $result;
    }
}