//var thur
//var thdiv
var gfeedfetcher_loading_image="indicator.gif" //Full URL to "loading" image. No need to config after this line!!
//var fdiv=1;
google.load("feeds","1")            //Load Google Ajax Feed API (version 1)


//var dclass

function gfeedfetcher(divid, divClass, linktarget){
	this.linktarget=linktarget || "_blank" //link target of RSS entries
	this.feedlabels=[] //array holding lables for each RSS feed
	this.feedurls=[]
	this.feeds=[] //array holding combined RSS feeds' entries from Feed API (result.feed.entries)
	this.feedsfetched=0 //number of feeds fetched
	this.feedlimit=5
  	this.showoptions="" //Optional components of RSS entry to show (none by default)
	this.sortstring="date" //sort by "date" by default
	document.write('<div id="'+divid+'" class="'+divClass+'"></div>') //output div to contain RSS entries
	this.feedcontainer=document.getElementById(divid)
	this.itemcontainer="<li>" //default element wrapping around each RSS entry item
	//thdiv=divid
	//dclass=divClass
}



gfeedfetcher.prototype.addFeed=function(label, url)
	{
	this.feedlabels[this.feedlabels.length]=label
	this.feedurls[this.feedurls.length]=url
	
}
	

gfeedfetcher.prototype.filterfeed=function(feedlimit, sortstr){
	this.feedlimit=feedlimit
	if (typeof sortstr!="undefined")
	this.sortstring=sortstr
}

gfeedfetcher.prototype.displayoptions=function(parts){
	this.showoptions=parts //set RSS entry options to show ("date, datetime, time, snippet, label, description")
}

gfeedfetcher.prototype.setentrycontainer=function(containerstr){  //set element that should wrap around each RSS entry item
this.itemcontainer="<"+containerstr.toLowerCase()+">"
}

gfeedfetcher.prototype.init=function(){
	this.feedsfetched=0 //reset number of feeds fetched to 0 (in case init() is called more than once)
	this.feeds=[] //reset feeds[] array to empty (in case init() is called more than once)
	this.feedcontainer.innerHTML='<img src="'+gfeedfetcher_loading_image+'" /> Retrieving RSS feed(s)'
	var displayer=this
	for (var i=0; i<this.feedurls.length; i++){ //loop through the specified RSS feeds' URLs
		var feedpointer=new google.feeds.Feed(this.feedurls[i]) //create new instance of Google Ajax Feed API
		var items_to_show=(this.feedlimit<=this.feedurls.length)? 1 : Math.floor(this.feedlimit/this.feedurls.length) //Calculate # of entries to show for each RSS feed
		if (this.feedlimit%this.feedurls.length>0 && this.feedlimit>this.feedurls.length && i==this.feedurls.length-1) //If this is the last RSS feed, and feedlimit/feedurls.length yields a remainder
			items_to_show+=(this.feedlimit%this.feedurls.length) //Add that remainder to the number of entries to show for last RSS feed
			
		feedpointer.setNumEntries(items_to_show) //set number of items to display
		feedpointer.load(function(r){displayer._fetch_data_as_array(r)}) //call Feed.load() to retrieve and output RSS feed
	}
}


gfeedfetcher._formatdate=function(datestr, showoptions){
	var itemdate=new Date(datestr)
	var parseddate=(showoptions.indexOf("datetime")!=-1)? itemdate.toLocaleString() : (showoptions.indexOf("date")!=-1)? itemdate.toLocaleDateString() : (showoptions.indexOf("time")!=-1)? itemdate.toLocaleTimeString() : ""
	return "<span class='datefield'>"+parseddate+"</span>"
}

gfeedfetcher._sortarray=function(arr, sortstr){
	var sortstr=(sortstr=="label")? "ddlabel" : sortstr //change "label" string (if entered) to "ddlabel" instead, for internal use
	if (sortstr=="title" || sortstr=="ddlabel"){ //sort array by "title" or "ddlabel" property of RSS feed entries[]
		arr.sort(function(a,b){
		var fielda=a[sortstr].toLowerCase()
		var fieldb=b[sortstr].toLowerCase()
		return (fielda<fieldb)? -1 : (fielda>fieldb)? 1 : 0
		})
	}
	else{ //else, sort by "publishedDate" property (using error handling, as "publishedDate" may not be a valid date str if an error has occured while getting feed
		try{
			arr.sort(function(a,b){return new Date(b.publishedDate)-new Date(a.publishedDate)})
		}
		catch(err){}
	}
}

gfeedfetcher.prototype._fetch_data_as_array=function(result){
	var thisfeed=(!result.error)? result.feed.entries : "" //get all feed entries as a JSON array or "" if failed
	
	if (thisfeed=="") //if error has occured fetching feed
		//alert("Google Feed API Error: "+result.error.message)
		
	for (var i=0; i<thisfeed.length; i++) //For each entry within feed
		result.feed.entries[i].ddlabel=this.feedlabels[this.feedsfetched] //extend it with a "ddlabel" property
	this.feeds=this.feeds.concat(thisfeed) //add entry to array holding all feed entries
	this._signaldownloadcomplete() //signal the retrieval of this feed as complete (and move on to next one if defined)
}

gfeedfetcher.prototype._signaldownloadcomplete=function(){
	this.feedsfetched+=1
	if (this.feedsfetched==this.feedurls.length) //if all feeds fetched
		this._displayresult(this.feeds) //display results
}


gfeedfetcher.prototype._displayresult=function(feeds){
	var rssoutput=(this.itemcontainer=="<li>")? "<ul>\n" : ""
	gfeedfetcher._sortarray(feeds, this.sortstring)
		
	for (var i=0; i<feeds.length; i++){
		//var check=1
		var itemtitle="<a href=\"" + feeds[i].link + "\" target=\"" + this.linktarget + "\" class=\"titlefield\" title=\"" + feeds[i].contentSnippet + "\">" + feeds[i].title + "</a>"
		var itemlabel=/label/i.test(this.showoptions)? '<span class="labelfield">['+this.feeds[i].ddlabel+']</span>' : " "
		var itemdate=gfeedfetcher._formatdate(feeds[i].publishedDate, this.showoptions)
		var itemdescription=/description/i.test(this.showoptions)? "<br />"+feeds[i].content : /snippet/i.test(this.showoptions)? "<br />"+feeds[i].contentSnippet  : ""
		if(feeds[i].title && (itemtitle != ""))
		{
		rssoutput+=this.itemcontainer + itemtitle + " " + itemlabel + " " + itemdate + "\n" + itemdescription + this.itemcontainer.replace("<", "</") + "\n\n"
		//check=check+1;
		}
	}
	//if(check == 1)
	//{
		//alert(this.feedurls.length);
		//thur=escape(this.feedurls);
		//alert(thdiv);
		//rssoutput+="we were not able to fetch the feeds <input type='button' id="+thdiv+" name="+thur+" value='Search Again' onclick='showRSS(this.name, this.id);'><br><div id="+thdiv+">"+thdiv+"</div>"
		//fdiv+=1
		//showRSS(this.feedurls);
		//alert(this.feedurls);
		
	//}
	rssoutput+=(this.itemcontainer=="<li>")? "</ul>" : ""
	this.feedcontainer.innerHTML=rssoutput
}
/*
var xmlHttp
//var dvurl
var divv
function showRSS(str, id)
 { 
 //alert(id+str);
 //dvurl=str
 divv=id
 xmlHttp=GetXmlHttpObject()
 if (xmlHttp==null)
  {
  alert ("Browser does not support HTTP Request")
  return
  }
 var url="rss.php"
 url=url+"?q="+str
 url=url+"&sid="+Math.random()
 xmlHttp.onreadystatechange=stateChanged 
 xmlHttp.open("GET",url,true)
 xmlHttp.send(null)
 }

function stateChanged() 
 { 
 if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
  { 
  document.getElementById(divv).innerHTML=xmlHttp.responseText 
  } 
  else
  {
	  document.getElementById(divv).innerHTML="Please wait.....";
  }  
 }

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;
}
*/