// array with users
var update1chat_users = new Array();
// last message id that has been displayed
var update1chat_last_msgid = fetch_cookie('update1chat_last_msgid');
update1chat_last_msgid = parseInt(update1chat_last_msgid) > 0 ? parseInt(update1chat_last_msgid) : 0;
// whether can update the text "...has entered..."
// when array with users is being re-created, we should stop text update
var update1chat_can_text = true;
// ajax instance
var ajax_update1chat = create_request_object();
// functions
function update_anytime_chat()
{
	ajax_update1chat.open('get', gvar.sub_dir +'/ajax/update_anytime_chat.php');
	ajax_update1chat.onreadystatechange = update_anytime_chat_response;
	ajax_update1chat.send(null);
	// run itself every 3 seconds = refresh anytime chatter regularly
	// oops, not anymore...
    //setTimeout('update_anytime_chat()', 3000);
}
function update_anytime_chat_response()
{
	if (ajax_update1chat.readyState == 4) {
		var response = ajax_update1chat.responseText;
		var str_response = String(response);
		// compare against []
		if (str_response.length <= 2) {
			return false;
		}
		var users = JSON.parse(response);
		// add users (if any)
		if (users.length) {
			var cu;
			// set flag to "stop text update". reason: these functions might be run simultaneously
			update1chat_can_text = false;
			
			// process objects
			for (var ic = 0; ic < users.length; ic++) {
				// check
				if (typeof(users[ic].user_id) == 'undefined' || typeof(users[ic].username) == 'undefined' || typeof(users[ic].user_img) == 'undefined' || typeof(users[ic].channel) == 'undefined' || typeof(users[ic].msg_id) == 'undefined' || typeof(users[ic].msg_date) == 'undefined') {
					continue;
				}
				// remove this user from the global users array
				for (var j = 0; j < update1chat_users.length; j++) {
					// ...so, the last entered user has the maximum array offset
					if (update1chat_users[j]['user_id'] == users[ic].user_id) {
						// found it. remove 1 element
						update1chat_users.splice(j, 1);
					}
				}
				// next available offset
				cu = update1chat_users.length;
				update1chat_users[cu] = new Array();
				// fill-in global users array
				update1chat_users[cu]['user_id'] = users[ic].user_id;
				update1chat_users[cu]['username'] = users[ic].username;
				update1chat_users[cu]['user_img'] = users[ic].user_img;
				update1chat_users[cu]['channel'] = users[ic].channel;
				update1chat_users[cu]['msg_id'] = users[ic].msg_id;
				update1chat_users[cu]['msg_date'] = users[ic].msg_date;
			}
			
			// have to sort it
			update1chat_users = sort_2d_array(update1chat_users, 'msg_id', 'desc');
			
			// users array re-created. set flag back to "can update text"
			update1chat_can_text = true;
			
			// run update text
			update_anytime_chat_text();
		}
	}
}
function update_anytime_chat_text()
{
	// check whether users array is in process of re-creating
	// if so, wait for the function above to call us
	if (!update1chat_can_text) {
		return true;
	}
	// check div for existence
	if (!document.getElementById) {
		return false;
	}
	var div_id = document.getElementById('update_anytime_chat');
	if (!div_id) {
		return false;
	}
	// look for the first user that we could display
	// begin looking from the last one, as first user is the latest entered
	for (var ic = update1chat_users.length - 1; ic >= 0; ic--) {
		// we should not display the same user twice, so only display who has entered after(!) latest displayed user
		if (parseInt(update1chat_users[ic]['msg_id']) > update1chat_last_msgid) {
			// retrieve data from the global users array
			var username = update1chat_users[ic]['username'];
			var user_img = String(update1chat_users[ic]['user_img']);
			// update message
			var msg = (user_img.length > 1 ? ''+
				'<div class="ua_chat_image_wrapper"><div class="ua_chat_img_div"><img src="'+ user_img +'" class="ua_chat_image" /></div></div>' : '') +
				'<div style="cursor:pointer;" onclick="document.location=\'./chat.php?room=1\'"><div class="ua_chat_bg_left"></div>'+
				'<div class="ua_chat_bg">Join <span class="ua_chat_username">'+ username +'</span> in Anytime Chat</div>'+
				'<div class="ua_chat_bg_right"></div><div class="clear_both"></div></div>';
			div_id.innerHTML = msg;
			
			// re-set global last_msgid
			update1chat_last_msgid = parseInt(update1chat_users[ic]['msg_id']);
			// and save it in cookies, so if user clicks another page, session is not loosed
			set_cookie('update1chat_last_msgid', update1chat_last_msgid, false, false, false);
			
			// run again if there are more persons to display 
			if (ic > 0) {
				// ...so we attempt to show them all before next ajax call
				setTimeout('update_anytime_chat_text()', 4000);
			}
			
			// stop loop right now
			return true;
		}
	}
	
	// the winner is not found
	return false;
}

//update in: 4 seconds
setTimeout('update_anytime_chat()', 4000);
//...64 seconds
setTimeout('update_anytime_chat()', 64000);
//...124 seconds
setTimeout('update_anytime_chat()', 124000);
//...184 seconds
setTimeout('update_anytime_chat()', 184000);