<?php
// Own namespace
namespace Org\Mxchange\CoreFramework\Frontend\Fuse;

// Import framework stuff
use Org\Mxchange\CoreFramework\Registry\Registerable;

// Import library stuff
use \FuseWrapper;

/**
 * A class for binding to the FUSE wrapper. This class requires the PHP
 * extension fuse.dll/so being added to your setup. If you want to use this
 * class, please activate and use the FUSE feature instead of using this class
 * directly. This gives you all required pre-tests. Please read there for
 * more detailed informations.
 *
 * @author		Roland Haeder <webmaster@ship-simu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2023 Core Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.ship-simu.org
 *
 * This program 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.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
class FrameworkFuseWrapper extends FuseWrapper implements Registerable {
	/**
	 * Get attributes
	 *
	 * @param	$path	Path to get attributes from
	 * @param	$stbuf	An instance of a FuseStat class
	 * @return	Status code
	 */
	public function FsGetAttr ($path, FuseStat $stbuf) {
		if (strcmp($path, '/') == 0 ) {
			$stbuf->st_mode = FUSE_S_IFDIR | 0750;
			$stbuf->st_nlink = 2;
		} else {
			$stbuf->st_uid   = posix_getuid();
			$stbuf->st_gid   = posix_getgid();
			$stbuf->st_mode  = FUSE_S_IFREG | 0640;
			$stbuf->st_nlink = 1;
			$stbuf->st_size  = 56;
			$stbuf->st_mtime = 1226379246;
		}

		return -FUSE_ENOERR;
	}

	/**
	 * Open operation
	 *
	 * @param	$path	Path to open
	 * @param	$fi		An instance of a FuseFileInfo class
	 * @return	Status code
	 */
	public function FsOpen ($path, FuseFileInfo $fi) {
		if (($fi->flags & FUSE_O_ACCMODE) != FUSE_O_RDONLY) {
			return -FUSE_ENOACCES;
		}

		return -FUSE_ENOERR;
	}

	/**
	 * Read operation
	 *
	 * @param	$path	Path to open
	 * @param	$buf	Read data
	 * @param	$size	Maximum expected size (?)
	 * @param	$offset	Seek offset
	 * @param	$fi		An instance of a FuseFileInfo class
	 * @return	Length of read data
	 */
	public function FsRead ($path, &$buf, $size, $offset, FuseFileInfo $fi) {
		$data = 'You have implemented your first FUSE file system with PHP!' . PHP_EOL;

		if ($offset > strlen($data)) {
			return 0;
		}

		$buf = substr( $data, $offset, $size );

		return strlen($data);
	}

	/**
	 * Read directory operation
	 *
	 * @param	$path	Path to open
	 * @param	$buf	An array with all read entries
	 * @return	Status code
	 */
	public function FsReadDir ($path, array &$buf) {
		if (strcmp($path, '/') != 0) {
			return -FUSE_ENOENT;
		}

		$buf[] = '.';
		$buf[] = '..';
		$buf[] = 'helloworld.txt';

		return -FUSE_ENOERR;
	}

}