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<?php
/**
* @package com_zoo
* @author YOOtheme http://www.yootheme.com
* @copyright Copyright (C) YOOtheme GmbH
* @license http://www.gnu.org/licenses/gpl.html GNU/GPL
*/
/**
* Backup helper class.
*
* @package Component.Helpers
* @since 2.0
*/
class BackupHelper extends AppHelper {
/**
* Returns all ZOO table names
*
* @return array All ZOO tables
*
* @since 2.0
*/
public function getTables() {
$tables = array();
foreach (get_defined_constants() as $key => $define) {
if (preg_match('/^ZOO_TABLE_/', $key)) {
$tables[$key] = $define;
}
}
return $tables;
}
/**
* Creates a backup of all ZOO tables
*
* @param callable $callback A callback to be called on all result rows
*
* @return string|false filename on success, else false
*
* @since 2.0
*/
public function all($callback = true) {
return $this->table($this->getTables(), $callback);
}
/**
* Creates a backup of tables
*
* @param array $tables Table(s) to backup
* @param function $callback The callback to call when the backup is done. Default: false
*
* @return string the mysql statements
*
* @since 2.0
*/
public function table($tables, $callback = false) {
// set_time_limit doesn't work in safe mode
if (!ini_get('safe_mode')) {
@set_time_limit(0);
}
// init vars
$db = $this->app->database;
$tables = (array) $tables;
$result = array();
if (!empty($tables)) {
foreach ($tables as $table) {
$table = $db->replacePrefix($table);
// create comments
$result[] = "\n\n-- --------------------------------------------------------\n";
$result[] = '--';
$result[] = '-- Table structure for table '.$table;
$result[] = "--\n";
$rows = $db->queryAssocList('SELECT * FROM '.$table);
if (is_callable($callback)) {
$rows = array_map($callback, $rows);
}
$result[] = 'DROP TABLE IF EXISTS '.$table.';';
$create = $db->queryAssoc('SHOW CREATE TABLE '.$table);
$create = preg_replace("#(TYPE)=(MyISAM)#i", "ENGINE=MyISAM", $create);
$create = $create['Create Table'];
$result[] = "$create;\n";
// create comments
$result[] = '--';
$result[] = '-- Table data for table '.$table;
$result[] = '--';
$insert = 'INSERT INTO '.$table.' VALUES(';
foreach ($rows as $row) {
$result[] = $insert.'"'.implode('","', array_map(array($db, 'escape'), $row))."\");";
}
}
return implode("\n", $result);
}
}
/**
* Restores a backup from sql dump file
*
* @param array $file The sql dump file
*
* @return boolean true on success
*
* @since 2.0
*/
public function restore($file) {
if (JFile::exists($file)) {
$db = $this->app->database;
// read index.sql
$buffer = file_get_contents($file);
// Create an array of queries from the sql file
jimport('joomla.installer.helper');
$queries = JInstallerHelper::splitSql($buffer);
if (!empty($queries)) {
foreach ($queries as $query) {
$query = trim($query);
if (!empty($query)) {
$db->query($query);
}
}
return true;
}
}
throw new RuntimeException("File not found ($file)");
}
/**
* Generates a header for the backup file
*
* @return string The header for the backup file
*
* @since 2.0
*/
public function generateHeader() {
$header = array('-- ZOO SQL Dump');
$header[] = '-- version '.$this->app->zoo->version();
$header[] = '-- http://www.yootheme.com';
$header[] = '--';
$header[] = '-- Host: '.trim(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '');
$header[] = '-- Creation Date: '.$this->app->date->create()->format('%Y-%m-%d %H:%M:%S');
$header[] = '-- Server Software: '.trim(isset($_SERVER['SERVER_SOFTWARE']) ? $_SERVER['SERVER_SOFTWARE'] : '');
$header[] = "\n";
$header[] = '-- ';
$header[] = '-- Database: '.$this->app->system->config->get('db');
$header[] = '-- ';
return implode("\n", $header);
}
}