/* original source: http://twitter.com/javascripts/blogger.js */

function twitterCallback2(twitters) {
  var statusHTML = [];
  for (var i=0; i<twitters.length; i++){
    var username = twitters[i].user.screen_name;
    var status = twitters[i].text.replace(/((https?|s?ftp|ssh)\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!])/g, function(url) {
      return '<a href="'+url+'">'+url+'</a>';
    }).replace(/\B@([_a-z0-9]+)/ig, function(reply) {
      return  reply.charAt(0)+'<a href="http://twitter.com/'+reply.substring(1)+'">'+reply.substring(1)+'</a>';
    });
    statusHTML.push('<li><span>'+status+'</span> <a style="font-size:85%" href="http://twitter.com/'+username+'/statuses/'+twitters[i].id+'">'+relative_time(twitters[i].created_at)+'</a></li>');
  }
  document.getElementById('twitter_update_list').innerHTML = statusHTML.join('');
}

function relative_time(time_value) {
  var values = time_value.split(" ");
  time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
  var parsed_date = Date.parse(time_value);
  var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
  var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
  delta = delta + (relative_to.getTimezoneOffset() * 60);

  if (delta < 60) {
    return 'less than a minute ago';
  } else if(delta < 120) {
    return 'about a minute ago';
  } else if(delta < (60*60)) {
    return (parseInt(delta / 60)).toString() + ' minutes ago';
  } else if(delta < (120*60)) {
    return 'about an hour ago';
  } else if(delta < (24*60*60)) {
    return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
  } else if(delta < (48*60*60)) {
    return '1 day ago';
  } else {
    return (parseInt(delta / 86400)).toString() + ' days ago';
  }
}

/* Begin caching code:
   original source: http://james.newtonking.com/archive/2009/02/21/add-twitter-to-your-blog-the-right-way-with-caching.aspx
*/

function setCookie(name, value, expires) {
  document.cookie = name + "=" + escape(value) + "; path=/" + ((expires == null) ? "" : "; expires=" + expires.toGMTString());
}
 
function getCookie(name) {
  if (document.cookie.length > 0) {
    var start = document.cookie.indexOf(name + "=");
    if (start != -1) { 
      start = start + name.length + 1; 
      var end = document.cookie.indexOf(";", start);
      if (end == -1) {
        end = document.cookie.length;
      }
      return unescape(document.cookie.substring(start, end));
    } 
  }
  return "";
}
 
function twitterCachedCallback(c) {
  // this will create the HTML. Function found inside blogger.js
  twitterCallback2(c);
 
  var content = document.getElementById("twitter_update_list").innerHTML;
 
  // expire cookie after 30 minutes
  var exp = new Date();
  exp.setTime(exp.getTime() + (1000 * 60 * 30));
  setCookie('twitter_content', content, exp);
}
 
// set content immediately if cached
var cachedContent = getCookie('twitter_content');
if (cachedContent) {
  document.getElementById("twitter_update_list").innerHTML = cachedContent;
}