(function ($) {
    $.fn.rssfeed = function (url, options, fn) {
        var defaults = {
            limit: 10,
            header: true,
            titletag: 'h4',
            date: true,
            content: true,
            snippet: true,
            showerror: true,
            errormsg: '',
            key: null,
            ssl: false,
            linktarget: '_self'
        };
        var options = $.extend(defaults, options);
        return this.each(function (i, e) {
            var $e = $(e);
            var s = '';
            if (options.ssl) s = 's';
            if (!$e.hasClass('rssFeed')) $e.addClass('rssFeed');
            if (url == null) return false;
            var api = "http" + s + "://ajax.googleapis.com/ajax/services/feed/load?v=1.0&callback=?&q=" + encodeURIComponent(url);
            if (options.limit != null) api += "&num=" + options.limit;
            if (options.key != null) api += "&key=" + options.key;
            api += "&output=json_xml"
            $.getJSON(api, function (data) {
                if (data.responseStatus == 200) {
                    _process(e, data.responseData, options);
                    if ($.isFunction(fn)) fn.call(this, $e);
                } else {
                    if (options.showerror) if (options.errormsg != '') {
                        var msg = options.errormsg;
                    } else {
                        var msg = data.responseDetails;
                    };
                    $(e).html('<div class="rssError"><p>' + msg + '</p></div>');
                };
            });
        });
    };
    var _process = function (e, data, options) {
            var feeds = data.feed;
            if (!feeds) {
                return false;
            }
            var html = '';
            var row = 'odd';
            var xml = getXMLDocument(data.xmlString);
            var xmlEntries = xml.getElementsByTagName('item');
            html += '<div class="rssBody">' + '<ul>';
            for (var i = 0; i < feeds.entries.length; i++) {
                var entry = feeds.entries[i];
                var pubDate;
                if (entry.publishedDate) {
                    var entryDate = new Date(entry.publishedDate);
                    var pubDate = entryDate.toLocaleDateString() + ' ' + entryDate.toLocaleTimeString();
                }
                html += '<li class="rssRow ' + row + '">' + '<' + options.titletag + '><a href="' + entry.link + '" title="View this feed at ' + feeds.title + '" target="' + options.linktarget + '">' + entry.title + '</a></' + options.titletag + '>'
                // if (options.date && pubDate) html += '<div>' + pubDate + '</div>'
                if (options.content) {
                    if (options.snippet && entry.contentSnippet != '') {
                        var content = entry.contentSnippet;
                    } else {
                        var content = entry.content;
                    }
                    html += '<p>' + content + '</p>'
                }
                if (xmlEntries.length > 0) {
                    var xmlMedia = xmlEntries[i].getElementsByTagName('enclosure');
                    if (xmlMedia.length > 0) {
                        html += '<div class="rssMedia"><div>Media files</div><ul>'
                        for (var m = 0; m < xmlMedia.length; m++) {
                            var xmlUrl = xmlMedia[m].getAttribute("url");
                            var xmlType = xmlMedia[m].getAttribute("type");
                            var xmlSize = xmlMedia[m].getAttribute("length");
                            html += '<li><a href="' + xmlUrl + '" title="Download this media">' + xmlUrl.split('/').pop() + '</a> (' + xmlType + ', ' + formatFilesize(xmlSize) + ')</li>';
                        }
                        html += '</ul></div>'
                    }
                    html += '</li>';
                }
                if (row == 'odd') {
                    row = 'even';
                } else {
                    row = 'odd';
                }
            }
            html += '</ul>' + '</div>'
            $(e).html(html);
        };

    function formatFilesize(bytes) {
        var s = ['bytes', 'kb', 'MB', 'GB', 'TB', 'PB'];
        var e = Math.floor(Math.log(bytes) / Math.log(1024));
        return (bytes / Math.pow(1024, Math.floor(e))).toFixed(2) + " " + s[e];
    }

    function getXMLDocument(string) {
        var browser = navigator.appName;
        var xml;
        if (browser == 'Microsoft Internet Explorer') {
            xml = new ActiveXObject('Microsoft.XMLDOM');
            xml.async = 'false'
            xml.loadXML(string);
        } else {
            xml = (new DOMParser()).parseFromString(string, 'text/xml');
        }
        return xml;
    }
})(jQuery);