/**
 * Plugin: jquery.zRSSFeed
 * 
 * Version: 1.0.1
 * (c) Copyright 2010, Zazar Ltd
 * 
 * Description: jQuery plugin for display of RSS feeds via Google Feed API
 *              (Based on original plugin jGFeed by jQuery HowTo)
 * 
 * History:
 * 1.0.1 - Corrected issue with multiple instances
 *
 **/

(function($){

  var current = null; 
  
  $.fn.rssfeed = function(url, options) { 
  
    // Set pluign defaults
    var defaults = {
      limit: 10,
      header: false,
      titletag: 'div',
      date: false,
      content: false,
      snippet: false,
      showerror: true,
      errormsg: '',
      key: null
    };  
    var options = $.extend(defaults, options); 
    
    // Functions
    return this.each(function(i, e) {
      var $e = $(e);
      
      // Add feed class to user div
      if (!$e.hasClass('rssFeed')) $e.addClass('rssFeed');
      
      // Check for valid url
      if(url == null) return false;

      // Create Google Feed API address
      var api = "http://ajax.googleapis.com/ajax/services/feed/load?v=1.0&callback=?&q=" + url;
      if (options.limit != null) api += "&num=" + options.limit;
      if (options.key != null) api += "&key=" + options.key;

      // Send request
      $.getJSON(api, function(data){
        
        // Check for error
        if (data.responseStatus == 200) {
  
          // Process the feeds
          _callback(e, data.responseData.feed, options);
        } else {

          // Handle error if required
          if (options.showerror)
            if (options.errormsg != '') {
              var msg = options.errormsg;
            } else {
              var msg = data.responseDetails;
            };
            $(e).html('<div class="rssError"><p>'+ msg +'</p></div>');
        };
      });       
    });
  };
  
  // Callback function to create HTML result
  var _callback = function(e, feeds, options) {
    if (!feeds) {
      return false;
    }
    var html = '';  
    var row = 'odd';  
    
    // Add header if required
    if (options.header)
      html += '<div class="rssHeader">' +
        '<a href="'+feeds.link+'" title="'+ feeds.description +'">'+ feeds.title +'</a>' +
        '</div>';
      
    // Add body
    html += '<div class="rssBody">' +
      '<ul>';
    
    // Add feeds
    for (var i=0; i<feeds.entries.length; i++) {
      
      // Get individual feed
      var entry = feeds.entries[i];
      
      // Format published date
      var entryDate = new Date(entry.publishedDate);
      var pubDate = entryDate.toLocaleDateString() + ' ' + entryDate.toLocaleTimeString();
      
      var $elem = $('<div>').html(entry.content);
      var $img = $elem.find('img');
      var imgurl = $img.attr("src");
      
      // Add feed row
      if (imgurl != "")
      {
        html += '<li class="rssRow '+row+'">' + 
          '<'+ options.titletag +'><a href="'+ entry.link +'" title="'+ entry.title +'"><img src="'+imgurl+'"><span class="title">'+ entry.title +'</span></a></'+ options.titletag +'>'
      }
      else
      {
        html += '<li class="rssRow '+row+'">' + 
          '<'+ options.titletag +'><a href="'+ entry.link +'" title="'+ entry.title +'"><span class="title">'+ entry.title +'</span></a></'+ options.titletag +'>'
      }
      if (options.date) html += '<div>'+ pubDate +'</div>'
      if (options.content) {
      
        // Use feed snippet if available and optioned
        if (options.snippet && entry.contentSnippet != '') {
          var content = entry.contentSnippet;
        } else {
          var content = entry.content;
        }
        
        html += '<p>'+ content +'</p>'
      }
      
      html += '</li>';
      
      // Alternate row classes
      if (row == 'odd') {
        row = 'even';
      } else {
        row = 'odd';
      }     
    }
    
    html += '</ul>' +
      '</div>'
    
    $(e).html(html);
  };
})(jQuery);