Parse links & usernames in twitter text.

twitter-text.js

// parses the text in a tweet and adds links to users, hash tags and urls
parseTweet: function (text) {
  // parse urls
  text = text.replace(/[A-Za-z]+:\/\/[A-Za-z0-9_-]+\.[A-Za-z0-9_:%&~\?\/.=-]+/g, function(url) {
    return url.link(url)
  })
  // parse usernames
  text = text.replace(/[@]+[A-Za-z0-9_-]+/g, function(u) {
    var username = u.replace("@","")
    return u.link("http://twitter.com/"+username)
  })
  // parse hashtags
  text = text.replace(/[#]+[A-Za-z0-9_-]+/g, function(t) {
    var tag = t.replace("#","%23")
    return t.link("http://search.twitter.com/search?q="+tag)
  })
  return text;
}