/* jFeed : jQuery feed parser plugin
 * Copyright (C) 2007 Jean-François Hovinne - http://www.hovinne.com/
 * Dual licensed under the MIT (MIT-license.txt)
 * and GPL (GPL-license.txt) licenses.
 */

jQuery.getFeed = function(options) {

    options = jQuery.extend({
    
        url: null,
        data: null,
        success: null,
        error: null,
        timeout: 3000
        
    }, options);

    if(options.url) {

        $.ajax({
            type: 'GET',
            url: options.url,
            data: options.data,
            timeout: options.timeout,
            dataType: 'xml',
            success: function(xml) {
                var feed = new JFeed(xml);
                if(jQuery.isFunction(options.success)) options.success(feed);
            },
            error: function(req, status, error){
                if(jQuery.isFunction(options.error)) options.error(req, status, error);
            }
        });
    }
};

function JFeed(xml) {
    if(xml) this.parse(xml);
};

JFeed.prototype = {

    type: '',
    version: '',
    title: '',
    link: '',
    description: '',
    parse: function(xml) {
        
        if(jQuery('channel', xml).length == 1) {
        
            this.type = 'rss';
            var feedClass = new JRss(xml);

        } else if(jQuery('feed', xml).length == 1) {
        
            this.type = 'atom';
            var feedClass = new JAtom(xml);
        }
        
        if(feedClass) jQuery.extend(this, feedClass);
    }
};

function JFeedItem() {};

JFeedItem.prototype = {

    title: '',
    link: '',
    description: '',
	pubDate: '',
    id: ''
};

function JFeedEnclosure() {};

JFeedEnclosure.prototype = {

    url: '',
    length: '',
    type: '',
    thumbnailUrl: ''
};

function JFeedChannelImage() {};

JFeedChannelImage.prototype = {
    url: '',
    title: '',
    link: ''
};

function JAtom(xml) {
    this._parse(xml);
};

JAtom.prototype = {
    
    _parse: function(xml) {
    
        var channel = jQuery('feed', xml).eq(0);

        this.version = '1.0';
        this.title = jQuery(channel).find('title:first').text();
        this.link = jQuery(channel).find('link:first').attr('href');
        this.description = jQuery(channel).find('subtitle:first').text();
        this.language = jQuery(channel).attr('xml:lang');
        this.updated = jQuery(channel).find('updated:first').text();
        
        this.items = new Array();
        
        var feed = this;
        
        jQuery('entry', xml).each( function() {
            var CurrentItem = this;
            var item = new JFeedItem();
            
            item.title = jQuery(this).find('title').eq(0).text();
            item.link = jQuery(this).find('link').eq(0).attr('url');
            item.description = jQuery(this).find('description').eq(0).text();
            item.updated = jQuery(this).find('updated').eq(0).text();
            item.id = jQuery(this).find('id').eq(0).text();

            item.enclosures = new Array();
            jQuery('media\\:content', CurrentItem).each(function(){
                // Add enclosures.
                var enclosure = new JFeedEnclosure();

                enclosure.url = jQuery(this).attr('url');
                //enclosure.length = jQuery(this).attr('length');
                //enclosure.type = jQuery(this).attr('type');
                enclosure.thumbnailUrl = jQuery(this).find('media\\:thumbnail').eq(0).attr('url');

                item.enclosures.push(enclosure);
            });

            feed.items.push(item);
        });
    }
};

function JRss(xml) {
    this._parse(xml);
};

JRss.prototype  = {
    
    _parse: function(xml) {
    
        if(jQuery('rss', xml).length == 0) this.version = '1.0';
        else this.version = jQuery('rss', xml).eq(0).attr('version');

        var channel = jQuery('channel', xml).eq(0);
    
        this.title = jQuery(channel).find('title:first').text();
        this.link = jQuery(channel).find('link:first').text();
        this.description = jQuery(channel).find('description:first').text();
        this.language = jQuery(channel).find('language:first').text();
        this.updated = jQuery(channel).find('lastBuildDate:first').text();
        
        var channelImage = new JFeedChannelImage();
        channelImage.url = jQuery(channel).find('image:first>url').text();
        channelImage.link = jQuery(channel).find('image:first>link').text();
        channelImage.title = jQuery(channel).find('image:first>title').text();
        this.image = channelImage;
    
        this.items = new Array();
        
        var feed = this;
        
        jQuery('item', xml).each( function() {
            var CurrentItem = this;
            var item = new JFeedItem();
            
            item.title = jQuery(this).find('title').eq(0).text();
            item.link = jQuery(this).find('link').eq(0).text();
            item.description = jQuery(this).find('description').eq(0).text();
            item.pubDate = jQuery(this).find('pubDate').eq(0).text();
            item.id = jQuery(this).find('guid').eq(0).text();

            if(jQuery(this).find('itunes\\:image').eq(0)){
                item.image = jQuery(this).find('itunes\\:image').eq(0).attr('href');
            }
			if(feed.image){ // If the feed does have an image attached..
				item.image = feed.image.url; // Set the item image to the feed image.
			}
			

            item.enclosures = new Array();

            jQuery('enclosure', CurrentItem).each(function(){
                // Add enclosures.
                var enclosure = new JFeedEnclosure();

                enclosure.url = jQuery(this).attr('url');
                enclosure.length = jQuery(this).attr('length');
                enclosure.type = jQuery(this).attr('type');

                item.enclosures.push(enclosure);
            });

            feed.items.push(item);
        });
    }
};