var xmlHttp;

var xmlHttp2;

var xmlHttp3;

var xmlHttp4;

var xmlHttp5;

var xmlHttp6;

var xmlHttp7;

var xmlHttp8;

var xmlHttp9;

var xmlHttp10;



var group = "";

var userId = 0;

var strangerId = 0;

var playTitleFlag = false;



// Generic function to create xmlHttpRequest for any browser //

function GetXmlHttpObject()

	{

	var xmlHttp = null;



	try

		{

		// Firefox, Opera 8.0+, Safari

		xmlHttp = new XMLHttpRequest();

		}

	catch (e)

		{

		//Internet Explorer

		try

			{

			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");

			}

		catch (e)

			{

			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");

			}

		}



	return xmlHttp;

	}





// Ajax part to get number of online chat //

function getNumberOfOnlineUsers()

	{

	xmlHttp = GetXmlHttpObject();



	if (xmlHttp == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "getNumberOfUsers.php";

	xmlHttp.open("POST", url, true);

	xmlHttp.onreadystatechange = stateChanged;

	xmlHttp.send(null);

	}



function stateChanged()

	{

	if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete")

		{

			var arr = xmlHttp.responseText;

			arr = arr.split(",");

		var count = arr[0];

		var countgroup = arr[1];

		var chatting = (count-countgroup);

		var whois = arr[2];

		document.getElementById("onlinecount").innerHTML = "USERS IN WAITING<br/>";

		document.getElementById("onlinecount").innerHTML +="<br/>"+countgroup+" in "+whois+" are holding on";

		window.setTimeout("getNumberOfOnlineUsers();", 12000);

		}

	}



// End of get number of online users//



// Ajax part start chat //

function startChat()

	{



		if(document.getElementById("group_a").checked){

			group = "group_a";

		}else{

			group = "group_b";

		}

	xmlHttp2 = GetXmlHttpObject();



	if (xmlHttp2 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "startChat.php";

	xmlHttp2.open("POST", url, true);

	xmlHttp2.onreadystatechange = stateChanged2;

	xmlHttp2.send(null);

	}



function stateChanged2()

	{

	if (xmlHttp2.readyState == 4 || xmlHttp2.readyState == "complete")

		{

		userId = trim(xmlHttp2.responseText);



		document.getElementById("chatbox").style.display = 'block';

		document.getElementById("sendbtn").disabled = true;

		document.getElementById("chatmsg").disabled = true;

		document.getElementById("disconnectbtn").disabled = true;



		document.getElementById("intro").style.display = 'none';

		document.getElementById("sayHi").style.display = 'none';



		if (document.getElementById("chatDisconnected") != undefined)

			document.getElementById("chatDisconnected").style.display = 'none';



		if (document.getElementById("startNew") != undefined)

			document.getElementById("startNew").style.display = 'none';



		groupedChat();

		}

	}



// End of start chat//



// Ajax part leave chat //

function leaveChat()

	{

	playTitleFlag = false;

	xmlHttp3 = GetXmlHttpObject();



	if (xmlHttp3 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "leaveChat.php?userId=" + userId+"&group=" + group;

	xmlHttp3.open("POST", url, true);

	xmlHttp3.onreadystatechange = stateChanged3;

	xmlHttp3.send(null);

	}



function stateChanged3()

	{

	}



// End of leave chat//



// Ajax part grouped chat //

function groupedChat()

	{

	xmlHttp4 = GetXmlHttpObject();



	if (xmlHttp4 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "groupedChat.php?userId=" + userId+"&group=" + group;

	xmlHttp4.open("POST", url, true);

	xmlHttp4.onreadystatechange = stateChanged4;

	xmlHttp4.send(null);

	}



function stateChanged4()

	{

	if (xmlHttp4.readyState == 4 || xmlHttp4.readyState == "complete")

		{

		strangerId = trim(xmlHttp4.responseText);



		if (strangerId != "0")

			{

			document.getElementById("sendbtn").disabled = false;

			document.getElementById("chatmsg").disabled = false;

			document.getElementById("disconnectbtn").disabled = false;

			document.getElementById("sayHi").style.display = 'block';

			document.getElementById("connecting").style.display = 'none';

			document.getElementById("looking").style.display = 'none';



			listenToReceive();

			isTyping();

			}



		else

			{

			window.setTimeout("groupedChat();", 2000);

			}

		}

	}



// End of grouped chat//



// Ajax part random chat //

function listenToReceive()

	{

	xmlHttp5 = GetXmlHttpObject();



	if (xmlHttp5 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "listenToReceive.php?userId=" + userId+"&group=" + group;

	xmlHttp5.open("POST", url, true);

	xmlHttp5.onreadystatechange = stateChanged5;

	xmlHttp5.send(null);

	}



function stateChanged5()

	{

	if (xmlHttp5.readyState == 4 || xmlHttp5.readyState == "complete")

		{

		var msg = xmlHttp5.responseText;



		if (trim(msg) == "||--noResult--||")

			{

			// other party is disconnected//

			document.getElementById("sendbtn").disabled = true;

			document.getElementById("chatmsg").disabled = true;

			document.getElementById("disconnectbtn").disabled = true;

			document.getElementById("sayHi").style.display = 'none';

			document.getElementById("chatDisconnected").style.display = 'block';

			document.getElementById("logbox").innerHTML

				+= "<div id='startNew' class='logitem'><div><input value='Start a new conversation' onclick='startNewChat();' type='button'> or <a href='http://www.twitter.com/blahtherapy'>Follow us on Twitter!</a></div></div>";

			document.getElementById("logbox").scrollTop = document.getElementById("logbox").scrollHeight;

			leaveChat();



			return;

			}



		else if (trim(msg) != "" && msg != undefined)

			{

			// Message received //

			document.getElementById("logbox").innerHTML

				+= "<div class='logitem'><div class='strangermsg'><span class='msgsource'>Stranger</span> &nbsp;"

					   + msg + "</div></div>";

			document.getElementById("logbox").scrollTop = document.getElementById("logbox").scrollHeight;

			playTitleFlag = true;

			playTitle();
			
			}



		window.setTimeout("listenToReceive();", 2000);

		}

	}



// End of random chat//



// Ajax part send chat message //

function sendMsg()

	{

	var msg = document.getElementById("chatmsg").value;



	if (trim(msg) != "")

		{

		appendMyMessage();

		xmlHttp6 = GetXmlHttpObject();



		if (xmlHttp6 == null)

			{

			alert("Browser does not support HTTP Request");

			return;

			}



		

		var url = "sendMsg.php?userId=" + userId + "&strangerId=" + strangerId + "&msg=" + msg;

		xmlHttp6.open("POST", url, true);

		xmlHttp6.onreadystatechange = stateChanged6;

		xmlHttp6.send(null);

		}

	}



function stateChanged6()

	{

	

	}



// End of send chat message//



//function to append my message to the chat area//

function appendMyMessage()

	{

	var msg = document.getElementById("chatmsg").value;



	if (trim(msg) != "")

		{

		document.getElementById("logbox").innerHTML

			+= "<div class='logitem'><div class='youmsg'><span class='msgsource'>You</span> " + msg

				   + "</div></div>";

		document.getElementById("logbox").scrollTop = document.getElementById("logbox").scrollHeight;

		}

	}



//function to disconnect

function disconnect()

	{

	var flag = confirm("Are you sure you want to be disconnected from this chat?");



	if (flag)

		{

		leaveChat();

		document.getElementById("sendbtn").disabled = true;

		document.getElementById("chatmsg").disabled = true;

		document.getElementById("disconnectbtn").disabled = true;



		document.getElementById("sayHi").style.display = 'none';

		document.getElementById("chatDisconnected").style.display = 'block';

		}

	}



//function to send on pressing Enter Key//

function tryToSend(event)

	{

	var key = event.keyCode;



	if (key == "13")

		{

		sendMsg();

		document.getElementById("chatmsg").value = "";

		var evt = event?event:window.event;

		evt.returnValue = false;

		if (evt.preventDefault) {evt.preventDefault( );return;}

		else {return false;}

		return;

		}



	var msg = document.getElementById("chatmsg").value;



	if (trim(msg) != "")

		{

		typing();

		}



	else

		{

		stopTyping();

		}

	}





// Ajax part to indicat user is typing //

function typing()

	{

	xmlHttp7 = GetXmlHttpObject();



	if (xmlHttp7 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "typing.php?userId=" + userId;

	xmlHttp7.open("POST", url, true);

	xmlHttp7.onreadystatechange = stateChanged7;

	xmlHttp7.send(null);

	}



function stateChanged7()

	{

	if (xmlHttp7.readyState == 4 || xmlHttp7.readyState == "complete")

		{

		}

	}



// End of indicat user is typing //





// Ajax part to indicat user is not typing //

function stopTyping()

	{

	xmlHttp8 = GetXmlHttpObject();



	if (xmlHttp8 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "stopTyping.php?userId=" + userId;

	xmlHttp8.open("POST", url, true);

	xmlHttp8.onreadystatechange = stateChanged8;

	xmlHttp8.send(null);

	}



function stateChanged8()

	{

	if (xmlHttp8.readyState == 4 || xmlHttp8.readyState == "complete")

		{

		}

	}



// End of indicat user is not typing //



// Ajax to see if stranger is typing//

function isTyping()

	{

	xmlHttp9 = GetXmlHttpObject();



	if (xmlHttp9 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "isTyping.php?strangerId=" + strangerId;

	xmlHttp9.open("POST", url, true);

	xmlHttp9.onreadystatechange = stateChanged9;

	xmlHttp9.send(null);

	}



function stateChanged9()

	{

	if (xmlHttp9.readyState == 4 || xmlHttp9.readyState == "complete")

		{

		if (trim(xmlHttp9.responseText) == "typing")

			{

			//alert("stranger is typing");

			document.getElementById("typing").style.display = 'block';

			}



		else

			{

			document.getElementById("typing").style.display = 'none';

			}



		window.setTimeout("isTyping();", 15000);

		}

	}



//Ajax to see if stranger is typing//



// to start new chat //

function startNewChat()

	{

	document.getElementById("logbox").innerHTML = "";

	document.getElementById("logbox").innerHTML

		= "<div id='connecting' class='logitem'><div class='statuslog'>Connecting to server...</div></div><div id='looking' class='logitem'><div class='statuslog'>Looking for someone you can chat with. Hang on.</div></div><div id='sayHi' class='logitem'><div class='statuslog'>You're now chatting with a random stranger. Say hi!</div></div><div id='chatDisconnected' class='logitem'><div class='statuslog'>Your conversational partner has disconnected.</div></div>";

	startChat();

	}



// function to trim strings

function trim(sVal)

	{

	var sTrimmed = "";



	for (i = 0; i < sVal.length; i++)

		{

		if (sVal.charAt(i) != " " && sVal.charAt(i) != "\f" && sVal.charAt(i) != "\n" && sVal.charAt(i)

																							 != "\r"

			&& sVal.charAt(i) != "\t")

			{

			sTrimmed = sTrimmed + sVal.charAt(i);

			}

		}



	return sTrimmed;

	}



// function to play title //

function playTitle()

	{

	document.title = "BlahTherapy";

	window.setTimeout('document.title="*New Message* BlahTherapy";', 1000);

	window.setTimeout('document.title="BlahTherapy";', 3000);



	if (playTitleFlag == true)

		{

		window.setTimeout('playTitle();', 4000);

		}

	}



// function to detect if browser has focus

window.onfocus = function()

	{

	playTitleFlag = false;

	}





// Ajax part to save log //

function saveLog()

	{

	xmlHttp10 = GetXmlHttpObject();



	if (xmlHttp10 == null)

		{

		alert("Browser does not support HTTP Request");

		return;

		}



	var url = "saveLog.php?userId=" + userId + "&strangerId=" + strangerId;

	xmlHttp10.open("POST", url, true);

	xmlHttp10.onreadystatechange = stateChanged10;

	xmlHttp10.send(null);

	}



function stateChanged10()

	{

	if (xmlHttp10.readyState == 4 || xmlHttp10.readyState == "complete")

		{

		var log = xmlHttp10.responseText;

		var generator = window.open('', '', 'height=400,width=500,top=100,left=100');

		generator.document.write('<html><head><title>Log File</title>');

		generator.document.write('<link type="text/css" rel="stylesheet" href="css/style.css">');

		generator.document.write('</head><body>');

		generator.document.write(log);

		generator.document.write('</body></html>');

		generator.document.close();

		}

	}

// End of save log//