<?php
$ini = parse_ini_file("conf.ini", true);
mysql_connect($ini['db']['host'],$ini['db']['user'],$ini['db']['pass']);
mysql_select_db($ini['db']['db']);

$user_id=$_REQUEST['u_id'];
$radius=$_REQUEST['radius'];
$lat=$_REQUEST['lat'];
$lon=$_REQUEST['lon'];

if ($radius>150){
	$distance=150;
}
else{
	$distance=$radius*0.8;
}

$distance_deg=$distance*0.009;

$datetime = date('Y-m-d H:i:s');
$a=$lat+$distance_deg;
$b=$lon;
$c=$lat+$distance_deg;
$d=$lon;
$dataArray = array('latitude'=>number_format((float)$a, 2, '.', ''),
			'longitude'=>number_format((float)$b, 2, '.', ''),
			'detection_latitude'=>number_format((float)$c, 2, '.', ''),
			'detection_longitude'=>number_format((float)$d, 2, '.', ''),
			'wave_speed'=>8,
			'counter'=>1,
			'intensity'=>2,
			'datetime'=>$datetime,
			'type'=>'eqn');

//extract users for notifications
$sql2=mysql_query("select reg_id from gcm where user_id=$user_id"); //1323571444
$counter=0;
$num_rows2 = mysql_num_rows($sql2);
if ($num_rows2>0){
	for ($i = 0; $i < $num_rows2; $i++) 
	{
		$regidArray[$counter]=mysql_result($sql2,$i,"reg_id");
		$counter=$counter+1;
		if ($counter==999 or $i==($num_rows2-1))
		{
			$headers = array( 
					'Authorization: key=AIzaSyAYaXDEapyd-mF9V9LNW1dmuoS-ea9GwWI',
					'Content-Type: application/json');
			$fields = array(
				'registration_ids'  => $regidArray,
				'data'              => $dataArray);				

			$context = stream_context_create(array(
			'http' => array(
			'method' => 'POST',
			'header' => $headers,
			'content' => json_encode($fields))));
			$response = file_get_contents('https://android.googleapis.com/gcm/send', FALSE, $context);
			$counter=0;	 
			$regidArray=array();
		}
	}
	print("ok");
}
else{
	print("notregistered");
}

mysql_close();	
?>