phone brazil directive

phonebrazil.js

.directive('phoneBrazil', [function(){
      return {
        restrict: 'A',
        require: 'ngModel',
        transclude: true,
        link: function($scope, iElm, iAttrs, ngModel) {

          if(!ngModel) return;

          ngModel.$formatters.unshift(formatter);
          ngModel.$parsers.unshift(parser);

          iElm.on('change', function (e) {
            e.target.value = formatter(ngModel.$viewValue);
          });

          function parser (value) {
            if(!value) return;
            return ngModel.$modelValue;
          }

          function formatter (value) {
            if(!value) return;
            return formatNumber(value);
          }

          function formatNumber(value) {

            var str = value + '';
                str = str.replace(/\D/g,'');

              ((str.length === 11) &&
                (str = str.replace(/^(\d{2})(\d{5})(\d{4})/,'($1) $2-$3'))) ||
                (str = str.replace(/^(\d{2})(\d{4})(\d{4})/,'($1) $2-$3'));

            return str;

          }

        }
      };
    }])