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<?php
/**
* Akeeba Engine
* The modular PHP5 site backup engine
* @copyright Copyright (c)2006-2015 Nicholas K. Dionysopoulos
* @license GNU GPL version 3 or, at your option, any later version
* @package akeebaengine
*
*/
namespace Akeeba\Engine\Filter;
// Protection against direct access
defined('AKEEBAENGINE') or die();
use Akeeba\Engine\Factory;
use Akeeba\Engine\Platform;
/**
* Incremental file filter
*
* It will only backup files which are newer than the last backup taken with this profile
*/
class Incremental extends Base
{
function __construct()
{
$this->object = 'file';
$this->subtype = 'all';
$this->method = 'api';
if (Factory::getKettenrad()->getTag() == 'restorepoint')
{
$this->enabled = false;
}
}
protected function is_excluded_by_api($test, $root)
{
static $filter_switch = null;
static $last_backup = null;
if (is_null($filter_switch))
{
$config = Factory::getConfiguration();
$filter_switch = Factory::getEngineParamsProvider()->getScriptingParameter('filter.incremental', 0);
$filter_switch = ($filter_switch == 1);
$last_backup = $config->get('volatile.filter.last_backup', null);
if (is_null($last_backup) && $filter_switch)
{
// Get a list of backups on this profile
$backups = Platform::getInstance()->get_statistics_list(array(
'filters' => array(
array(
'field' => 'profile_id',
'value' => Platform::getInstance()->get_active_profile())
)
));
// Find this backup's ID
$model = Factory::getStatistics();
$id = $model->getId();
if (is_null($id))
{
$id = -1;
}
// Initialise
$last_backup = time();
$now = $last_backup;
// Find the last time a successful backup with this profile was made
if (count($backups))
{
foreach ($backups as $backup)
{
// Skip the current backup
if ($backup['id'] == $id)
{
continue;
}
// Skip non-complete backups
if ($backup['status'] != 'complete')
{
continue;
}
$tzUTC = new \DateTimeZone('UTC');
$dateTime = new \DateTime($backup['backupstart'], $tzUTC);
$backuptime = $dateTime->getTimestamp();
$last_backup = $backuptime;
break;
}
}
if ($last_backup == $now)
{
// No suitable backup found; disable this filter
$config->set('volatile.scripting.incfile.filter.incremental', 0);
$filter_switch = false;
}
else
{
// Cache the last backup timestamp
$config->set('volatile.filter.last_backup', $last_backup);
}
}
}
if (!$filter_switch)
{
return false;
}
// Get the filesystem path for $root
$config = Factory::getConfiguration();
$fsroot = $config->get('volatile.filesystem.current_root', '');
$ds = ($fsroot == '') || ($fsroot == '/') ? '' : DIRECTORY_SEPARATOR;
$filename = $fsroot . $ds . $test;
// Get the timestamp of the file
$timestamp = @filemtime($filename);
// If we could not get this information, include the file in the archive
if ($timestamp === false)
{
return false;
}
// Compare it with the last backup timestamp and exclude if it's older than the last backup
if ($timestamp <= $last_backup)
{
//Factory::getLog()->log(LogLevel::DEBUG, "Excluding $filename due to incremental backup restrictions");
return true;
}
// No match? Just include the file!
return false;
}
}