add API to deliver notification messages about phd2client HOT 10 OPEN

//----------Read the log file-----------

$file = 'log.txt';	//open log file
$fp = fopen($file, 'r');
fseek($fp,-1,SEEK_END);		//read last line's informations
$log = '';
while(($c = fgetc($fp)) !== falloge)
{
	if($c == "\n" && $log)
		break;
	$log = $c . $log;
	fseek($fp, -2, SEEK_CUR);	//read next-to-last line's informations
}
fclose($fp);	//close log file

//--------Choose useful informations---------

$log=trim($log);						//delete " "
$log=preg_replace("/\s/","",$log);		//delete "\s"
$log=preg_replace('/"/',"",$log);		//delete ":"
$log=preg_replace("/{/","",$log);		//delete "{"
$log=preg_replace("/}/","",$log);		//delete "}"

//--------get the guide stats----------

$stats=explode(",",$log);
$stats=explode(":",$stats[0]);

//--------judge the guide stats----------

if($stats[1] == "GuideStep")		//Guiding
{
	$dir=explode(",",$log);
	$dir=explode(":",$dir[14]);
	$dir1=explode(",",$log);
	$dir1=explode(":",$dir1[16]);
	if($dir[0] == "StarMass")		//moving direction did not change
	{
		$file=fopen("guiding_ra.txt.txt","r");		//get ra moving direction from data
		$RAdir=trim(fgets($file));
		fclose($file);
		
		$file=fopen("guiding_dec.txt.txt","r");		//get dec moving direction from data
		$DECdir=trim(fgets($file));
		fclose($file);
	}
	else
	{
		if($dir[0] == "RADirection" && $dir1[0] == "DECDirection")		//both RA and DEC moving directions have changed
		{
			if($dir[1] == "East")		//judge RA moving direction
				$RAdir=1;				//RA direction is east
			else
				$RAdir=0;				//RA direction is west
				
			//Write RA moving direction into data 
			$file = fopen("guiding_ra.txt", "w") or die("Unable to open file!");            
			fwrite($file, $RAdir);
			fclose($file);
			
			if($dir1[1] == "North")		//judge DEC moving direction
				$DECdir=1;				//DEC direction is north
			else
				$DECdir=0;				//DEC direction is south
				
			//Write DEC moving direction into data
			$file = fopen("guiding_dec.txt", "w") or die("Unable to open file!");            
			fwrite($file, $DECdir);
			fclose($file);
		}
		else
		{
			if($dir[0] == "RADirection")		//RA moving direction has changed
			{
				if($dir[1] == "East")		//judge RA moving direction
					$RAdir=1;				//RA direction is east
				else
					$RAdir=0;				//RA direction is west
					
				$file = fopen("guiding_ra.txt", "w") or die("Unable to open file!");            
				fwrite($file,$RAdir);
				fclose($file);
				
				$file=fopen("guiding_dec.txt","r");		//get dec moving direction from data
				$DECdir=trim(fgets($file));
				fclose($file);
			}
			else	//DEC moving direction has changed
			{
				if($dir[1] == "North")		//judge DEC moving direction
					$DECdir=1;				//DEC direction is north
				else
					$DECdir=0;				//DEC direction is south
					
				$file = fopen("guiding_dec.txt", "w") or die("Unable to open file!");            
				fwrite($file, $DECdir);
				fclose($file);
				
				$file=fopen("guiding_ra.txt","r");		//get ra moving direction from data
				$RAdir=trim(fgets($file));
				fclose($file);
			}
		}
	}
	
	//calculate RA moving distance
	
	$radis=explode(",",$log);		//get RA distance
	$radis=explode(":",$radis[9]);
	if($RAdir == 0)		//RA moving direction is west
		$radis[1]=0-$radis[1];
		
	//calculate DEC moving distance
	
	$decdis=explode(",",$log);		//get dec distance
	$decdis=explode(":",$decdis[10]);
	if($decdir == 0)		//DEC moving direction is south
		$decdis[1]=0-$decdis[1];
	echo "    DRIFT_DATA:$radis[1] $decdis[1]\n";
	
}
if($stats[1] == "Alert")		//Alert
{
	$alert=explode(",",$log);
	$alert=explode(":",$alert[4]);
	$file = fopen("guiding_alert.txt", "a") or die("Unable to open file!");            
	fwrite($file,$alert[1]);
	fclose($file);
	passthru("php notify_guiding.php");
	echo "AAAAA";
}
if($stats[1] == "GuidingStopped" || $stats[1] == "LoopingExposuresStopped")		//Stopped
{
	$file = fopen("guiding.txt", "a") or die("Unable to open file!");            
	fwrite($file,"Stopped.");
	fclose($file);
	echo "GGGGG";
}
if($stats[0] == "jsonrpc")		//PHD2 Error
{
	$error=explode(",",$log);
	$error = strstr($error[2],"message");
	$file = fopen("guiding_error.txt", "a") or die("Unable to open file!");            
	fwrite($file,"$error\n");
	fclose($file);
	echo "PHD2 Error";
}