/*
 ======================================================================
 RSS JavaScript Ticker object
 Author: George at JavaScriptKit.com/ DynamicDrive.com
 Created: Feb 5th, 2006. Updated: Feb 5th, 2006
 ======================================================================
*/

	function createAjaxObj(){
		var httprequest=false
		if (window.XMLHttpRequest){ // if Mozilla, Safari etc
			httprequest=new XMLHttpRequest()
			
			if (httprequest.overrideMimeType)
				httprequest.overrideMimeType('text/xml')
			
		}
		else if (window.ActiveXObject){ // if IE
			try {
				httprequest=new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch (e){
			try{
				httprequest=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e){}
			}
		}
		return httprequest
	}

// -------------------------------------------------------------------
// Main RSS Ticker Object function
// rss_ticker(RSS_id, cachetime, divId, divClass, delay, optionalswitch)
// -------------------------------------------------------------------

	function rss_ticker(game_id, RSS_id, cachetime, divId, divClass, delay, optionalswitch){
		this.game_id=game_id
		this.RSS_id=RSS_id //Array key indicating which RSS feed to display
		this.cachetime=cachetime //Time to cache feed, in minutes. 0=no cache.
		this.tickerid=divId //ID of ticker div to display information
		this.delay=delay //Delay between msg change, in miliseconds.
		this.logicswitch=(typeof optionalswitch!="undefined")? optionalswitch : -1
		this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
		this.pointer=0
		this.ajaxobj=createAjaxObj()
		document.write('<div id="'+divId+'" class="'+divClass+'">Initializing ticker...</div>')
		this.getAjaxcontent()
	}

// -------------------------------------------------------------------
// getAjaxcontent()- Makes asynchronous GET request to "rssfetch.php" with the supplied parameters
// -------------------------------------------------------------------

	rss_ticker.prototype.getAjaxcontent=function(){
		if (this.ajaxobj){
			var instanceOfTicker=this
			var parameters="game_id="+encodeURIComponent(this.game_id)+"&id="+encodeURIComponent(this.RSS_id)+"&cachetime="+this.cachetime+"&bustcache="+new Date().getTime()
			this.ajaxobj.onreadystatechange=function(){instanceOfTicker.initialize()}
			this.ajaxobj.open('GET', "/includes/ticker.php?"+parameters, true)
			this.ajaxobj.send(null)
		}
	}

// -------------------------------------------------------------------
// initialize()- Initialize ticker method.
// -Gets contents of RSS content and parse it using JavaScript DOM methods 
// -------------------------------------------------------------------

	rss_ticker.prototype.initialize=function(){ 
		if (this.ajaxobj.readyState == 4){ //if request of file completed
			if (this.ajaxobj.status==200){ //if request was successful
				var xmldata=this.ajaxobj.responseXML
				if(xmldata.getElementsByTagName("item").length==0){ //if no <item> elements found in returned content
					document.getElementById(this.tickerid).innerHTML="<b>Error</b> fetching remote RSS feed!<br />"+this.ajaxobj.responseText
					return
				}
				var instanceOfTicker=this
				this.feeditems=xmldata.getElementsByTagName("item")
				
				//Cycle through RSS XML object and store each peice of the item element as an attribute of the element
				for (var i=0; i<this.feeditems.length; i++){
					this.feeditems[i].setAttribute("ctitle", this.feeditems[i].getElementsByTagName("title")[0].firstChild.nodeValue)
					this.feeditems[i].setAttribute("clink", this.feeditems[i].getElementsByTagName("link")[0].firstChild.nodeValue)
					this.feeditems[i].setAttribute("cdescription", this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue)
				}
				document.getElementById(this.tickerid).onmouseover=function(){instanceOfTicker.mouseoverBol=1}
				document.getElementById(this.tickerid).onmouseout=function(){instanceOfTicker.mouseoverBol=0}
				this.rotatemsg()
			}
		}
	}

// -------------------------------------------------------------------
// rotatemsg()- Rotate through RSS messages and displays them
// -------------------------------------------------------------------

	rss_ticker.prototype.rotatemsg=function(){
		var instanceOfTicker=this
		if (this.mouseoverBol==1) //if mouse is currently over ticker, do nothing (pause it)
			setTimeout(function(){instanceOfTicker.rotatemsg()}, 100)
		else{
			var tickerDiv=document.getElementById(this.tickerid)
			var tickercontent='<a target="_blank" href="'+this.feeditems[this.pointer].getAttribute("clink")+'">'+this.feeditems[this.pointer].getAttribute("ctitle")+'</a>'
			if (this.logicswitch=="showdescription")
				tickercontent+="<br />"+this.feeditems[this.pointer].getAttribute("cdescription")
			tickerDiv.innerHTML=tickercontent
			this.pointer=(this.pointer<this.feeditems.length-1)? this.pointer+1 : 0
			setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay) //update container every second
		}
	}