/******************************************* Twitter Formatting ************************************************************/
var ify = {
  link: function(tweet) {
	return tweet.replace(/\b(((https*\:\/\/)|www\.)[^\"\']+?)(([!?,.\)]+)?(\s|$))/g, function(link, m1, m2, m3, m4) {
	  var http = m2.match(/w/) ? 'http://' : '';
	  return '<a class="twtr-hyperlink" target="_blank" href="' + http + m1 + '">' + ((m1.length > 25) ? m1.substr(0, 24) + '...' : m1) + '</a>' + m4;
	});
  },

  at: function(tweet) {
	return tweet.replace(/\B[@]([a-zA-Z0-9_]{1,20})/g, function(m, username) {
	  return '@<a target="_blank" class="twtr-atreply" href="http://twitter.com/' + username + '">' + username + '</a>';
	});
  },

  list: function(tweet) {
	return tweet.replace(/\B[@]([a-zA-Z0-9_]{1,20}\/\w+)/g, function(m, userlist) {
	  return '@<a target="_blank" class="twtr-atreply" href="http://twitter.com/' + userlist + '">' + userlist + '</a>';
	});
  },

  hash: function(tweet) {
	return tweet.replace(/(^|\s+)#(\w+)/gi, function(m, before, hash) {
	  return before + '<a target="_blank" class="twtr-hashtag" href="http://twitter.com/search?q=%23' + hash + '">#' + hash + '</a>';
	});
  },

  clean: function(tweet) {
	return this.hash(this.at(this.list(this.link(tweet))));
  }
};

var browser = function() {
  var ua = navigator.userAgent;
  return {
	ie: ua.match(/MSIE\s([^;]*)/)
  };
}();

var timeAgo = function (dateString) {
var rightNow = new Date();
var then = new Date(dateString);

if (browser.ie) {
// IE can't parse these crazy Ruby dates
then = Date.parse(dateString.replace(/( \+)/, ' UTC$1'));
}

var diff = rightNow - then;

var second = 1000,
  minute = second * 60,
  hour = minute * 60,
  day = hour * 24,
  week = day * 7;

if (isNaN(diff) || diff < 0) {
return ""; // return blank string if unknown
}

if (diff < second * 2) {
// within 2 seconds
return "right now";
}

if (diff < minute) {
return Math.floor(diff / second) + " seconds ago";
}

if (diff < minute * 2) {
return "about 1 minute ago";
}

if (diff < hour) {
return Math.floor(diff / minute) + " minutes ago";
}

if (diff < hour * 2) {
return "about 1 hour ago";
}

if (diff < day) {
return  Math.floor(diff / hour) + " hours ago";
}

if (diff > day && diff < day * 2) {
return "yesterday";
}

if (diff < day * 365) {
return Math.floor(diff / day) + " days ago";
}

else {
return "over a year ago";
}

};