window.ify = function() {
  var entities = {
      '"' : '"',
      '&' : '&',
      '<' : '&lt;',
      '>' : '&gt;'
  };

  return {
    "link": function(t) {
      return t.replace(/[a-z]+:\/\/[a-z0-9-_]+\.[a-z0-9-_:~%&\?\/.=]+[^:\.,\)\s*$]/ig, function(m) {
        return '<a href="' + m + '">' + ((m.length > 25) ? m.substr(0, 24) + '...' : m) + '</a>';
      });
    },
    "at": function(t) {
      return t.replace(/(^|[^\w]+)\@([a-zA-Z0-9_]{1,15})/g, function(m, m1, m2) {
        return m1 + '@<a href="http://twitter.com/' + m2 + '">' + m2 + '</a>';
      });
    },
    "hash": function(t) {
      return t.replace(/(^|[^\w'"]+)\#([a-zA-Z0-9_]+)/g, function(m, m1, m2) {
        return m1 + '#<a href="http://search.twitter.com/search?q=%23' + m2 + '">' + m2 + '</a>';
      });
    },
    "clean": function(tweet) {
      return this.hash(this.at(this.link(tweet)));
    }
  };
}();

function relative_time(time_value) {
    var monthDict = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
    var values = time_value.split(" "),
        parsed_date = Date.parse(values[1] + " " + values[2] + ", " + values[4] + " " + values[3]),
        date = new Date(parsed_date),
        relative_to = (arguments.length > 1) ? arguments[1] : new Date(),
        delta = parseInt((relative_to.getTime() - parsed_date) / 1000),
        r = '';
    
    function formatTime(date) {
        var hour = date.getHours(),
            min = date.getMinutes() + "",
            ampm = 'AM';
        
        if (hour == 0) {
            hour = 12;
        } else if (hour == 12) {
            ampm = 'PM';
        } else if (hour > 12) {
            hour -= 12;
            ampm = 'PM';
        }
        
        if (min.length == 1) {
            min = '0' + min;
        }
        
        return hour + ':' + min + ' ' + ampm;
    }
    
    function formatDate(date) {
        var ds = date.toDateString().split(/ /),
            mon = monthDict[date.getMonth()],
            day = date.getDate()+'',
            dayi = parseInt(day),
            year = date.getFullYear(),
            thisyear = (new Date()).getFullYear(),
            th = 'th';

        if ((dayi % 10) == 1 && day.substr(0, 1) != '1') {
            th = 'st';
        } else if ((dayi % 10) == 2 && day.substr(0, 1) != '1') {
            th = 'nd';
        } else if ((dayi % 10) == 3 && day.substr(0, 1) != '1') {
            th = 'rd';
        }
        
        if (day.substr(0, 1) == '0') {
            day = day.substr(1);
        }
        
        return mon + ' ' + day + th + (thisyear != year ? ', ' + year : '');
    }
    
    delta = delta + (relative_to.getTimezoneOffset() * 60);

    if (delta < 5) {
        r = 'less than 5 seconds ago';
    } else if (delta < 30) {
        r = 'half a minute ago';
    } else if (delta < 60) {
        r = 'less than a minute ago';
    } else if (delta < 120) {
        r = '1 minute ago';
    } else if (delta < (45*60)) {
        r = (parseInt(delta / 60)).toString() + ' minutes ago';
    } else if (delta < (2*90*60)) {
        r = 'about 1 hour ago';
    } else if (delta < (24*60*60)) {
        r = 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
    } else {
        if (delta < (48*60*60)) {
            r = formatTime(date) + ' yesterday';
        } else {
            r = formatTime(date) + ' ' + formatDate(date);
        }
    }

    return r;
}