<?php
	class SessionManager {
		
		private static $cookie_name = "hrphpsession";
		private static $file = "data/session.json";
		private static $expire = array("default" => 86400, "remember" => 2592000); 
		public static $valid;
		
		public static function Init() {
			self::$valid = self::Check();	
		}
		
		public static function Set($remember) {
			
			$data = array(
				"hash" => md5(rand().uniqid()),
				"IP" => $_SERVER['REMOTE_ADDR'],
				"timestamp" => time(),
				"remember" => ($remember ? 1 : 0)
			);
			
			$fw = fopen(self::$file,"w");
			fwrite($fw,json_encode($data));
			fclose($fw);
			
			setcookie(self::$cookie_name,$data["hash"],time()+($remember ? self::$expire["remember"] : self::$expire["default"]));
			
		}
		
		public static function Destroy() {
			
			setcookie(self::$cookie_name,time()-self::$expire["remember"]);
			unlink(self::$file);
			
		}
		
		public static function Check() {
			
			if(file_exists(self::$file) && isset($_COOKIE[self::$cookie_name])) {
				
				try {
					
					$data = json_decode(file_get_contents(self::$file), true);
					
					return 
					(($data["remember"]==1 && time() < $data["timestamp"]+self::$expire["remember"]) || 
					($data["remember"]==0 && time() < $data["timestamp"]+self::$expire["default"]) && 
					$data["IP"] == $_SERVER['REMOTE_ADDR'] &&
					$data["hash"] == $_COOKIE[self::$cookie_name]);
				
				}
				catch (Exception $e) {
					/* Do nothing */	
				}
			}
			
			return false;
		}
	}
?>