<?php

/**
 *      [Discuz!] (C)2001-2099 Comsenz Inc.
 *      This is NOT a freeware, use is subject to license terms
 *
 *      $Id: optimizer_dbbackup_clean.php 31344 2012-08-15 04:01:32Z zhangjie $
 */

if(!defined('IN_DISCUZ')) {
	exit('Access Denied');
}

class optimizer_dbbackup_clean {

	public function __construct() {

	}

	public function check() {
		global $_G;
		$exportlog = $exportsize = $exportziplog = array();
		$filecount = 0;
		$this->check_exportfile($exportlog, $exportziplog, $exportsize, $filecount);
		if(!$filecount) {
			$return = array('status' => 0, 'type' => 'none', 'lang' => lang('optimizer', 'optimizer_dbbackup_clean_safe'));
		} else {
			$return = array('status' => 1, 'type' => 'notice', 'lang' => lang('optimizer', 'optimizer_dbbackup_clean_delete', array('filecount' => $filecount)));
		}
		return $return;
	}

	function get_backup_dir() {

		$backupdirs = array();
		$dir = dir(DISCUZ_ROOT.'./data');
		while(($file = $dir->read()) !== FALSE) {
			if(filetype(DISCUZ_ROOT.'./data/'.$file) == 'dir' && preg_match('/^backup_\w+/', $file)) {
				$backupdirs[] = $file;
			}
		}
		$dir->close();
		return $backupdirs;
	}

	function check_exportfile(&$exportlog, &$exportziplog, &$exportsize, &$filecount) {

		$backupdirs = $this->get_backup_dir();
		if(empty($backupdirs)) {
			return;
		}

		$filecount = 0;
		foreach($backupdirs as $backupdir) {
			$dir = dir(DISCUZ_ROOT.'./data/'.$backupdir);
			while($entry = $dir->read()) {
				$entry = './data/'.$backupdir.'/'.$entry;
				if(is_file($entry)) {
					if(preg_match("/\.sql$/i", $entry)) {
						$filesize = filesize($entry);
						$fp = fopen($entry, 'rb');
						$identify = explode(',', base64_decode(preg_replace("/^# Identify:\s*(\w+).*/s", "\\1", fgets($fp, 256))));
						fclose($fp);
						$key = preg_replace('/^(.+?)(\-\d+)\.sql$/i', '\\1', basename($entry));
						$exportlog[$key][$identify[4]] = array(
							'version' => $identify[1],
							'type' => $identify[2],
							'method' => $identify[3],
							'volume' => $identify[4],
							'tablepre' => $identify[5],
							'dbcharset' => $identify[6],
							'filename' => $entry,
							'dateline' => filemtime($entry),
							'size' => $filesize
						);
						$filecount++;
						$exportsize[$key] += $filesize;
					} elseif(preg_match("/\.zip$/i", $entry)) {
						$key = preg_replace('/^(.+?)(\-\d+)\.zip$/i', '\\1', basename($entry));
						$filesize = filesize($entry);
						$exportziplog[$key][] = array(
							'type' => 'zip',
							'filename' => $entry,
							'size' => filesize($entry),
							'dateline' => filemtime($entry)
						);
						$filecount++;
					}
				}
			}
			$dir->close();
		}
	}
}

?>