var gfeedfetcher_loading_image = "../loading.gif"
google.load("feeds", "1")
 function gfeedfetcher(divid, divClass, linktarget) {
    this.linktarget = linktarget || ""
    this.feedlabels = []
    this.feedurls = []
    this.feeds = []
    this.feedsfetched = 0
    this.feedlimit = 5
    this.showoptions = ""
    this.sortstring = "date"
    document.write('<div id="' + divid + '" class="' + divClass + '"></div>')
    this.feedcontainer = document.getElementById(divid)
    this.itemcontainer = "<li>"
}
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
}
gfeedfetcher.prototype.setentrycontainer = function(containerstr) {
    this.itemcontainer = "<" + containerstr.toLowerCase() + ">"
}
gfeedfetcher.prototype.init = function() {
    this.feedsfetched = 0
    this.feeds = []
    this.feedcontainer.innerHTML = '<img src="' + gfeedfetcher_loading_image + '" /> retrieving...'
    var displayer = this
    for (var i = 0; i < this.feedurls.length; i++) {
        var feedpointer = new google.feeds.Feed(this.feedurls[i])
        var items_to_show = (this.feedlimit <= this.feedurls.length) ? 1: Math.floor(this.feedlimit / this.feedurls.length)
        if (this.feedlimit % this.feedurls.length > 0 && this.feedlimit > this.feedurls.length && i == this.feedurls.length - 1)
        items_to_show += (this.feedlimit % this.feedurls.length)
        feedpointer.setNumEntries(items_to_show)
        feedpointer.load(function(r) {
            displayer._fetch_data_as_array(r)
        })
    }
}
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
    if (sortstr == "title" || sortstr == "ddlabel") {
        arr.sort(function(a, b) {
            var fielda = a[sortstr].toLowerCase()
            var fieldb = b[sortstr].toLowerCase()
            return (fielda < fieldb) ? -1: (fielda > fieldb) ? 1: 0

        })
    }
    else {
        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: ""
    if (thisfeed == "")
    alert("Google Feed API Error: " + result.error.message)
    for (var i = 0; i < thisfeed.length; i++)
    result.feed.entries[i].ddlabel = this.feedlabels[this.feedsfetched]
    this.feeds = this.feeds.concat(thisfeed)
    this._signaldownloadcomplete()
}
gfeedfetcher.prototype._signaldownloadcomplete = function() {
    this.feedsfetched += 1
    if (this.feedsfetched == this.feedurls.length)
    this._displayresult(this.feeds)
}
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
}