<?php
require_once('./js/log4php/Logger.php');
require_once('./paths.php');
require_once('./controller.php');

class BackupCache {
	private $log;
	private $cache = null;

	public function __construct(){
		
		global $redis_host;
		global $redis_port;
		global $redis_scheme;
		
		global $host;

	$this->log = Logger::getLogger(__CLASS__);
        Logger::configure('./js/log4php/log4php.xml');      	
	if(class_exists("Predis\Client")){
		
			try {
//todo changed timeout from 0 to -1 
			$this->cache = new Predis\Client(array("scheme" => $redis_scheme,"host" => $redis_host,"port" => $redis_port,"read_write_timeout" => -1));
				$this->log->info("redis host: ".$redis_host." and redis port: ".$redis_port);
			} catch(Exception $e) {
				$this->log->error("Error connecting to Redis server: ".$e->getMessage());
				$this->cache = null; 
			}
		}
    	else{
            $this->log->info("cache does not exist"); //predis
			exit;
    	}
	}

function backup() {

if($this->cache != null){ 

$this->log->info("cache exists");			
$database = new MYDB();
$database->doConnect($GLOBALS['schema_file']);			
$keys = $this->cache->keys("*");

$this->log->info(" *******************BACKING UP NUMS************************");

$numKeys=$this->cache->hkeys('STATS_NUMBERS');
for($x=0;$x<count($numKeys);$x++)
{$key=$numKeys[$x];
 $value=$this->cache->hget('STATS_NUMBERS',$key);
 $this->cache->hset('STATS_NUMBERS_BACKUP',$key,$value);
}

$this->log->info("All Num Entries Backed up Sucessfully!");
//NOW PROCEED TO CHARTS AND DATA

for($x=0;$x<count($keys);$x++) {
if ((strpos($keys[$x],'chart')===false)&&(strpos($keys[$x],'table')===false)&&(strpos($keys[$x],'STATS')===false))
{
 try
{
$query = $this->cache->hget($keys[$x],'query');
$persistent= $this->cache->hget($keys[$x],'persistent');
if($query!=null)
{						$this->log->info("going tobackup the results for query  ".$query );
						$fetchMode = $this->cache->hget($keys[$x], 'fetchMode');
						if($fetchMode==null){ $fetchMode=3; }
                                                $shadowResults =$this->cache->hget($keys[$x],'shadow');
                                                $result = $this->cache->hget($keys[$x], 'results');
				               
                        
	$this->cache->hmset($keys[$x],array("results" => $result, "query" =>$query,"persistent" => $persistent,"shadow" => $shadowResults, "fetchMode" => $fetchMode, "backup" => $result));                       
$this->log->info("Stored Entry : ");
$this->log->info("backup ".$this->cache->hget($keys[$x],'backup'));
					}
}catch(Exception $e) {
$this->log->error('Error : '.$e->getMessage()); }			

}

else 
{$this->log->info("Ignoring chart key: ".$keys[$x]); }
}

$database->doDisconnect();
$this->log->info("Finished Backup! : ");
}
}
}

?>