twitter_format.js

/* via http://www.simonwhatley.co.uk/ */
Twitter = {
  format: function(tweet) {
    return Twitter.formatHashtag(Twitter.formatUsername(Twitter.formatURL(tweet)));
  },
  formatURL: function(string) {
  	return string.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function(url) {
  		return url.link(url);
  	});
  },
  formatUsername: function(string) {
  	return string.replace(/[@]+[A-Za-z0-9-_]+/, function(u) {
  		var username = u.replace("@","");
  		return u.link("http://twitter.com/"+username);
  	});
  },
  formatHashtag: function(string) {
  	return string.replace(/[#]+[A-Za-z0-9-_]+/, function(t) {
  		var tag = t.replace("#","%23");
  		return t.link("http://search.twitter.com/search?q="+tag);
  	});
  }
}