//OBJECTS

//objects inside the RSS2Item object

var imageTag = "<img id='chan_image'";
	var startItemTag = "<div id='item'>";
	var startItemTag1 = "<div id='item1'>";
	var startTitle = "<p id='item_title'>";
	var startLink = "<div id='item_link'>";
	var startDescription = "<div id='item_description'>";
	var endTag = "</p>";

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;
	this.image
	this.category;
	this.area;
	//optional vars
	this.author;
	this.comments;
	this.pubDate;
	this.priority

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

	var properties = new Array("title", "link", "description", "author", "comments", "pubDate", "image", "category", "priority",  "area");
	var tmpElement = null;
	for (var i=0; i<properties.length; i++)
	{
		tmpElement = itemxml.getElementsByTagName(properties[i])[0];
		if (tmpElement != 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");

	for (var i=0; i<itemElements.length; 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)
			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","/rss.xml",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)
					processRSS(xhr.responseXML);
				else
				{
					alert("Failed to receive RSS file from the server - file not found.");
					return false;
				}
			}
			else
				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 startItemTag1 = "<div id='item1'>";
	var startTitle = "<p id='item_title'>";
	var startLink = "<div id='item_link'>";
	var startDescription = "<div id='item_description' style='padding-left:4px;'>";
	var endTag = "</p>";


	//populate channel data
	var properties = new Array("title","link","description","pubDate","copyright");
	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 = "";
	
	var feed = document.getElementById('areacode').value;
	
	
	
//	var selectcontent;
//	selectcontent = 'Filter by Category <select id="categorycode" onchange="getRSS(&quot;this.value&quot;);">';
//	selectcontent += '<option value="all">All</option>';
//	for (var i=0; i<RSS.items.length; i++)
//	{
//		if(RSS.items[i].category != 'Other articles'){
//		if(feed == RSS.items[i].area) {
//		 selectcontent += '<option value="'+RSS.items[i].category+'">'+RSS.items[i].category+'</option>';
				
//		} else if(feed == 'all') {
//		selectcontent += '<option value="'+RSS.items[i].category+'">'+RSS.items[i].category+'</option>';
		
//		}
//}
		

//	}
//	selectcontent += '<option value="Other articles">Other articles</option>';
//	selectcontent += '</select>';
//	document.getElementById('filtercat').innerHTML=selectcontent;
//	var catc = document.getElementById('categorycode').value;
	
		
		for (var i=0; i<RSS.items.length; i++)
	{
//		if((feed == 'all' && catc == 'all') || (feed == RSS.items[i].area && (catc == 'all' || catc == RSS.items[i].category)) || (catc == RSS.items[i].category && (feed == RSS.items[i].area || feed == 'all'))) {
		if(feed =='all' || feed == RSS.items[i].area) {

		var cat = RSS.items[i].area;
		item_html = startItemTag;
		item_html += '<a href="' + RSS.items[i].link+'" title="'+ RSS.items[i].title + '"><img src="'+RSS.items[i].image+'" class="imgRight" style="padding-left:4px; margin-bottom:10px; float:right;border:none;" /></a>';
		item_html += (RSS.items[i].title == null) ? "" : '<p class="itmTtl"><a href=\"' + RSS.items[i].link + '\" title=\" '+ RSS.items[i].title +'\">' + RSS.items[i].title + '</a>';
		
		//item_html += (RSS.items[i].link == null) ? "" : startLink + RSS.items[i].link + endTag;
		item_html += (RSS.items[i].description == null) ? "" : startDescription + RSS.items[i].description+'</p>';
		item_html += endTag;
		
		document.getElementById("chan_items").innerHTML += item_html;
		document.getElementById("chan_items").style.display='block';
		
		if(feed == 'all'){
		document.getElementById("itemTTl").innerHTML = 'All travel articles';
		} else {
			if (document.getElementById('areacode').value == 'Need inspiration?'){
				document.getElementById("itemTTl").innerHTML = RSS.items[i].area;
			} else {
				document.getElementById("itemTTl").innerHTML = RSS.items[i].area +' articles';
			}
		}


		}

	}



	//we're done
	//document.getElementById("chan").style.visibility = "visible";
	return true;
}







var xhr;

function filterRSS(im){
	

	if(im == 'CB'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='Caribbean';
}
	if(im == 'EU'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='Europe';
}
	if(im == 'FE'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='Far East';
} 

	if(im == 'US'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='USA &amp; Canada';
} 
	if(im == 'IN'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='Indian Subcontinent';
} 
	if(im == 'AU'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='Australasia &amp; South Pacific';
} 
	if(im == 'NA'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='North Africa &amp; Middle East';
} 

	if(im == 'CA'){
	document.getElementById('chan_items'+im).style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsOther').style.display='none';
	document.getElementById('recent').style.display='none';
	document.getElementById('chan_itemsAll').style.display='none';
	document.getElementById('artTit').innerHTML='Central &amp; South America';
} 
	if(im == 'all'){
	document.getElementById('chan_itemsAll').style.display='block';
	document.getElementById('chan_items').style.display='block';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsAF').style.display='none';
	document.getElementById('chan_itemsCB').style.display='none';
	document.getElementById('chan_itemsEU').style.display='none';
	document.getElementById('chan_itemsFE').style.display='none';
	document.getElementById('chan_itemsUS').style.display='none';
	document.getElementById('chan_itemsIN').style.display='none';
	document.getElementById('chan_itemsAU').style.display='none';
	document.getElementById('chan_itemsNA').style.display='none';
	document.getElementById('recent').style.display='block';
	document.getElementById('artTit').innerHTML='All articles';
}

}