Convert a Twitter created_at timestamp to something more human friendly

twitter_created_at.coffee

# Based upon John Resig's Pretty Date
# http://ejohn.org/blog/javascript-pretty-date/

Helpers = ->
  @convert_twitter_timestamp = (time) ->
    date = new Date(Date.parse(time))
    diff = (((new Date()).getTime() - date.getTime()) / 1000)
    day_diff = Math.floor(diff / 86400)

    if diff < 60
      "just now"
    else if diff < 120
      "1 minute ago"
    else if diff < 3600
      "#{Math.floor(diff / 60)} minutes ago"
    else if diff < 7200
      "1 hour ago"
    else if diff < 86400
      "#{Math.floor(diff / 3600)} hours ago"
    else if day_diff == 1
      "Yesterday"
    else if day_diff < 7
      "#{day_diff} days ago"
    else if day_diff == 7
      "1 week ago"
    else if day_diff < 31
      "#{Math.ceil(day_diff / 7)} weeks ago"
    else
      "A long time ago"