<?php

if(!class_exists("ip_log")) include ("ip_log.php");
if(!class_exists("hits")) include ("hits.php");

class uniquehits 
{
var $db_connection = "";
var $ip_address = "";
var $timestamp = "";

// --------------------------------------
// class to deal with hits to the website
// --------------------------------------

	function log_IP($timestamp) {
		// log the ip address of the person accessing the site
		$ip_log = new ip_log();
		$ip_log->set_ip_address($this->ip_address);
		$ip_log->set_lastUpdated($timestamp);
		$ip_log->store();		
	}
	
	function remove_IP() {
		// remove the ip address from the system
		$my_ip_record = $this->check_IP();
		$my_ip_record[0]->deletedb();
	}
	
	function add_hit() {
		$hits = new hits();
		$hits->set_Id(1);
		$hits->retrievedb();
		$hits->set_hits($hits->get_hits() + 1);
		$hits->store();		
	}
	
	function get_hits() {
		// returns the hits on the website
		$hits = new hits();
		$hits->set_Id(1);
		$hits->retrievedb();
		return $hits->get_hits();
	}
	
	function check_IP() {
	// check if the ip address exists
	
		// Performing SQL query
		$all_ip_addresses = array();
		$ip_log = new ip_log();
		$ip_log->set_profile(" and ip_address = '". $this->ip_address."'");
		$ip_log->collection($all_ip_addresses);
		// return what has been retrieved
		return $all_ip_addresses;
		
	}
	
	function timestampDiff($dateTimeBegin, $timestamp) {
      
		// calculate the difference between the new timestamp  s
         $dif=$timestamp - $dateTimeBegin;
		// convert it to minutes		 
         return(floor($dif/60)); //60s=1m

    } 


	function hit($my_ip_address) 
	{
		// set current timestamp for this function call
		$this->timestamp = strtotime("now");
		// and IP address passed in
		$this->ip_address = $my_ip_address;
		
		// dont log my ip address as a hit
		if (!isset($HTTP_COOKIE_VARS["DONT_REGISTER_IP"])) {
		
			// try and get the ip row from the database
			$my_ip_record = $this->check_IP();
			
			// if a row was found...		
			if (sizeof($my_ip_record) > 0 )
			{
			
				// if more than 5 minutes has passed since ip last hit this page, log a hit
				if($this->timestampDiff($my_ip_record[0]->get_last_updated(), $this->timestamp) > 4)
				{
					// remove the old record
					$this->remove_IP();
					// register the ip address
					$this->log_IP($this->timestamp);
					// now update the hit count
					$this->add_hit();
				}
				else
				{
					// do nothing, hit has been logged within the last 5 mins for by this ip address
				}		
			}
			else
			{
				// unknown ip address, register it
				$this->log_IP($this->timestamp);
				// and log a hit
				$this->add_hit();		
			}
		}
	}
	
}
?>