text: 'use strict';
  
  angular.module('errors', ['ngSanitize'])
  
  .filter('errorLink', ['$sanitize', function($sanitize) {
    var LINKY_URL_REGEXP = /((ftp|https?):\/\/|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>]/g,
        MAILTO_REGEXP = /^mailto:/,
        STACK_TRACE_REGEXP = /:\d+:\d+$/;
  
    var truncate = function(text, nchars) {
      if (text.length > nchars) {
        return text.substr(0, nchars - 3) + '...';
      }
      return text;
    };
  
    return function(text, target) {
      if (!text) return text;
  
      var targetHtml = target ? ' target="' + target + '"' : '';
  
      return $sanitize(text.replace(LINKY_URL_REGEXP, function(url) {
        if (STACK_TRACE_REGEXP.test(url)) {
          return url;
        }
  
        // if we did not match ftp/http/mailto then assume mailto
        if (!/^((ftp|https?):\/\/|mailto:)/.test(url)) url = 'mailto:' + url;
  
        return '<a' + targetHtml + ' href="' + url + '">' +
                  truncate(url.replace(MAILTO_REGEXP, ''), 60) +
                '</a>';
      }));
    };
  }])
  
  
  .directive('errorDisplay', ['$location', 'errorLinkFilter', function($location, errorLinkFilter) {
    var encodeAngleBrackets = function(text) {
      return text.replace(/</g, '&lt;').replace(/>/g, '&gt;');
    };
  
    var interpolate = function(formatString) {
      var formatArgs = arguments;
      return formatString.replace(/\{\d+\}/g, function(match) {
        // Drop the braces and use the unary plus to convert to an integer.
        // The index will be off by one because of the formatString.
        var index = +match.slice(1, -1);
        if (index + 1 >= formatArgs.length) {
          return match;
        }
        return formatArgs[index + 1];
      });
    };
  
    return {
      link: function(scope, element, attrs) {
        var search = $location.search(),
          formatArgs = [attrs.errorDisplay],
          formattedText,
          i;
  
        for (i = 0; angular.isDefined(search['p' + i]); i++) {
          formatArgs.push(search['p' + i]);
        }
  
        formattedText = encodeAngleBrackets(interpolate.apply(null, formatArgs));
        element.html(errorLinkFilter(formattedText, '_blank'));
      }
    };
  }]);
  