//OBJECTS

//objects inside the RSS2Item object
function RSS2Enclosure(encElement)
{
	if (encElement == null)
	{
		this.url = null;
		this.length = null;
		this.type = null;
	}
	else
	{
		this.url = encElement.getAttribute("url");
		this.length = encElement.getAttribute("length");
		this.type = encElement.getAttribute("type");
	}
}

function RSS2Guid(guidElement)
{
	if (guidElement == null)
	{
		this.isPermaLink = null;
		this.value = null;
	}
	else
	{
		this.isPermaLink = guidElement.getAttribute("isPermaLink");
		this.value = guidElement.childNodes[0].nodeValue;
	}
}

function RSS2Source(souElement)
{
	if (souElement == null)
	{
		this.url = null;
		this.value = null;
	}
	else
	{
		this.url = souElement.getAttribute("url");
		this.value = souElement.childNodes[0].nodeValue;
	}
}

//object containing the RSS 2.0 item
function RSS2Item(itemxml)
{
	//required
	this.title;
	this.link;
	this.description;

	//optional vars
	this.author;
	this.comments;
	this.pubDate;

	//optional objects
	this.category;
	this.enclosure;
	this.guid;
	this.source;

	var properties = new Array("title", "link", "description", "author", "comments", "pubDate");
	var tmpElement = null;
	for (var i=0; i<properties.length; i++)
	{
		tmpElement = itemxml.getElementsByTagName(properties[i])[0];
		
		if (tmpElement != null && tmpElement.childNodes[0] !=null)
			eval("this."+properties[i]+"=tmpElement.childNodes[0].nodeValue");
	}

	this.category = new RSS2Category(itemxml.getElementsByTagName("category")[0]);
	this.enclosure = new RSS2Enclosure(itemxml.getElementsByTagName("enclosure")[0]);
	this.guid = new RSS2Guid(itemxml.getElementsByTagName("guid")[0]);
	this.source = new RSS2Source(itemxml.getElementsByTagName("source")[0]);
	
	
}

//objects inside the RSS2Channel object
function RSS2Category(catElement)
{
	if (catElement == null)
	{
		this.domain = null;
		this.value = null;
	}
	else
	{
		this.domain = catElement.getAttribute("domain");
		this.value = catElement.childNodes[0].nodeValue;
	}
}

//object containing RSS image tag info
function RSS2Image(imgElement)
{
	if (imgElement == null)
	{
	this.url = null;
	this.link = null;
	this.width = null;
	this.height = null;
	this.description = null;
	}
	else
	{
		imgAttribs = new Array("url","title","link","width","height","description");
		for (var i=0; i<imgAttribs.length; i++)
			if (imgElement.getAttribute(imgAttribs[i]) != null)
				eval("this."+imgAttribs[i]+"=imgElement.getAttribute("+imgAttribs[i]+")");
	}
}

//object containing the parsed RSS 2.0 channel
function RSS2Channel(rssxml)
{
	//required
	this.title;
	this.link;
	this.description;

	//array of RSS2Item objects
	this.items = new Array();

	//optional vars
	this.language;
	this.copyright;
	this.managingEditor;
	this.webMaster;
	this.pubDate;
	this.lastBuildDate;
	this.generator;
	this.docs;
	this.ttl;
	this.rating;

	//optional objects
	this.category;
	this.image;

	var chanElement = rssxml.getElementsByTagName("channel")[0];
	var itemElements = rssxml.getElementsByTagName("item");
	
	var MAX_COUNT = 4;
	if (MAX_COUNT > itemElements.length) {
		MAX_COUNT = itemElements.length
	}
	
	for (var i=0; i<MAX_COUNT; i++)
	{
		Item = new RSS2Item(itemElements[i]);
		this.items.push(Item);
		//chanElement.removeChild(itemElements[i]);
	}

	var properties = new Array("title", "link", "description", "language", "copyright", "managingEditor", "webMaster", "pubDate", "lastBuildDate", "generator", "docs", "ttl", "rating");
	var tmpElement = null;
	for (var i=0; i<properties.length; i++)
	{
		tmpElement = chanElement.getElementsByTagName(properties[i])[0];
		if (tmpElement != null && tmpElement.childNodes[0] !=null)
			eval("this."+properties[i]+"=tmpElement.childNodes[0].nodeValue");
	}

	this.category = new RSS2Category(chanElement.getElementsByTagName("category")[0]);
	this.image = new RSS2Image(chanElement.getElementsByTagName("image")[0]);
}

//PROCESSES

//uses xmlhttpreq to get the raw rss xml
function getRSS()
{
	//call the right constructor for the browser being used
	if (window.ActiveXObject)
		xhr = new ActiveXObject("Microsoft.XMLHTTP");
	else if (window.XMLHttpRequest)
		xhr = new XMLHttpRequest();
	else
		alert("not supported");

	//prepare the xmlhttprequest object
	xhr.open("GET","/todayseconomy/feed/",true);
	xhr.setRequestHeader("Cache-Control", "no-cache");
	xhr.setRequestHeader("Pragma", "no-cache");
	xhr.onreadystatechange = function() {
	
		if (xhr.readyState == 4)
		{
			if (xhr.status == 200)
			{		
				if (xhr.responseText != null) {
					if (document.getElementById("chan") != null)
						processRSS(xhr.responseXML);
				}
				else
				{
					alert("Failed to receive RSS file from the server - file not found.");
					return false;
				}
			}
			//we don't want this alert popup in preview environments since it only works in xxx-www sites
			else if (xhr.status != 404)
				alert("Error code " + xhr.status + " received: " + xhr.statusText);
		}
	}

	//send the request
	xhr.send(null);
}

//processes the received rss xml
function processRSS(rssxml)
{
	RSS = new RSS2Channel(rssxml);
	showRSS(RSS);
}

//shows the RSS content in the browser
function showRSS(RSS)
{
	//default values for html tags used
	//var imageTag = "<img id='chan_image'>";
	//var startItemTag = "<div id='item'>";
	//var startTitle = "<div id='item_title'>";
	//var startLink = "<div id='item_link'>";
	//var startDescription = "<div id='item_description'>";
	//var endTag = "</div>";

	//populate channel data
	/**var properties = new Array("title","description","pubDate");
	for (var i=0; i<properties.length; i++)
	{
		eval("document.getElementById('chan_"+properties[i]+"').innerHTML = ''");
		curProp = eval("RSS."+properties[i]);
		if (curProp != null) 
			eval("document.getElementById('chan_"+properties[i]+"').innerHTML = curProp");
		
	}**/

	//show the image
	/**document.getElementById("chan_image_link").innerHTML = "";
	if (RSS.image.src != null)
	{
		document.getElementById("chan_image_link").href = RSS.image.link;
		document.getElementById("chan_image_link").innerHTML = imageTag
			+" alt='"+RSS.image.description
			+"' width='"+RSS.image.width
			+"' height='"+RSS.image.height
			+"' src='"+RSS.image.url
			+"' "+"/>";
	}**/

	//populate the items
	document.getElementById("chan_items").innerHTML = "";
	
	for (var i=0; i<RSS.items.length; i++)
	{
		
		if (i==0) {
			var aStartTag = "<a href=" + RSS.items[i].link + ">";
			var aEndTag = "</a>";
			var item_html = "";
			
			//item_html = startItemTag;
			item_html += (RSS.items[i].title == null) ? "" : aStartTag + "<b>" +  RSS.items[i].title  + "</b>" + aEndTag;
			
			var month = RSS.items[i].pubDate.substring(8,11);
			var day = RSS.items[i].pubDate.substring(5,7);
			var year = RSS.items[i].pubDate.substring(12,16);
			
			if (month == "Jan") month = "January";
			if (month == "Feb") month = "February";
			if (month == "Mar") month = "March";
			if (month == "Apr") month = "April";
			if (month == "Jun") month = "Jun";
			if (month == "Jul") month = "July";
			if (month == "Aug") month = "August";
			if (month == "Sep") month = "September";
			if (month == "Oct") month = "October";
			if (month == "Nov") month = "November";
			if (month == "Dec") month = "December";
			
			//get rid of the leading zero if its a single number date
			if (day.substring(0,1) == "0") day = day.substring(1);
			
			var date = month + " " + day + ", " + year;
			
			item_html += "<p><span class='date'>" + date + "</span></p>";
			item_html += (RSS.items[i].description == null) ? "" : RSS.items[i].description;
			//item_html += (RSS.items[i].description == null) ? "" : RSS.items[i].description.substring(0, RSS.items[i].description.indexOf('[...]', 0));
			
			
		}
		else {
			var aStartTag = "<a href=" + RSS.items[i].link + ">";
			var aEndTag = "</a>";
			var item_html = "";
			
			if (i==1) {
				item_html += "<br/><p><h4 style='margin-bottom: 6px;'>Recent posts:</h4>";
			}
			
			
			//item_html = startItemTag;
			item_html += "<li style='list-style-type: none;margin-bottom: 6px;padding-left:10px;'>";
			item_html += "<img style='padding-right:10px' src='/static/slfglobal/images/box_yellow.gif'>";
			item_html += (RSS.items[i].title == null) ? "" : aStartTag + RSS.items[i].title + aEndTag;
			item_html += "</li>";
			
			if (i==RSS.items.length-1) {
				item_html += "";
			}
			
		}
		//alert(RSS.items[i].description);
		document.getElementById("chan_items").innerHTML += item_html;
	}
		//alert(document.getElementById("chan_items").innerHTML);
	//we're done
	//document.getElementById("chan").style.visibility = "visible";
	return true;
}

var xhr;