var gfeedfetcher_loading_image="loading" //Full URL to "loading" image. No need to config after this line!!

google.load("feeds", "1") //Load Google Ajax Feed API (version 1)

function gfeedfetcher(divid, divClass, linktarget){

this.linktarget=linktarget || "" //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

}

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 itemtitle="<a href=\"" + feeds[i].link + "\" target=\"" + this.linktarget + "\" class=\"titlefield\">" + 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  : ""

rssoutput+=this.itemcontainer + itemtitle + " " + itemlabel + " " + itemdate + "\n" + itemdescription + this.itemcontainer.replace("<", "</") + "\n\n"

}

rssoutput+=(this.itemcontainer=="<li>")? "</ul>" : ""

this.feedcontainer.innerHTML=rssoutput

}