Angularjs directive to replace text

Question

How would I create a directive in angularjs that for example takes this element:

Example text http://example.com

And

Answer 1

Inspired by @Neal I made this "no sanitize" filter from the newer Angular 1.5.8. It also recognizes addresses without ftp|http(s) but starting with www. This means that both https://google.com and www.google.com will be linkyfied.

angular.module('filter.parselinks',[])

.filter('parseLinks', ParseLinks);

function ParseLinks() {
  var LINKY_URL_REGEXP =
        /((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"\u201d\u2019]/i,
      MAILTO_REGEXP = /^mailto:/i;

  var isDefined = angular.isDefined;
  var isFunction = angular.isFunction;
  var isObject = angular.isObject;
  var isString = angular.isString;

  return function(text, target, attributes) {
    if (text == null || text === '') return text;
    if (typeof text !== 'string') return text;

    var attributesFn =
      isFunction(attributes) ? attributes :
      isObject(attributes) ? function getAttributesObject() {return attributes;} :
      function getEmptyAttributesObject() {return {};};

    var match;
    var raw = text;
    var html = [];
    var url;
    var i;
    while ((match = raw.match(LINKY_URL_REGEXP))) {
      // We can not end in these as they are sometimes found at the end of the sentence
      url = match[0];
      // if we did not match ftp/http/www/mailto then assume mailto
      if (!match[2] && !match[4]) {
        url = (match[3] ? 'http://' : 'mailto:') + url;
      }
      i = match.index;
      addText(raw.substr(0, i));
      addLink(url, match[0].replace(MAILTO_REGEXP, ''));
      raw = raw.substring(i + match[0].length);
    }
    addText(raw);
    return html.join('');

    function addText(text) {
      if (!text) {
        return;
      }
      html.push(text);
    }

    function addLink(url, text) {
      var key, linkAttributes = attributesFn(url);
      html.push('');
      addText(text);
      html.push('');
    }
  };
}