GUACAMOLE-96: Open "otpauth" link when user clicks on barcode.

extensions/guacamole-auth-totp/src/main/resources/controllers/authenticationCodeFieldController.js

@@ -21,8 +21,8 @@
  * Controller for the "GUAC_TOTP_CODE" field which prompts the user to enter
  * the code generated by their authentication device.
  */
-angular.module('guacTOTP').controller('authenticationCodeFieldController', ['$scope',
-    function authenticationCodeFieldController($scope) {
+angular.module('guacTOTP').controller('authenticationCodeFieldController', ['$scope', '$window',
+    function authenticationCodeFieldController($scope, $window) {
 
     /**
      * The secret key split into groups of at most four characters each, or
@@ -56,4 +56,13 @@ angular.module('guacTOTP').controller('authenticationCodeFieldController', ['$sc
         $scope.detailsShown = false;
     };
 
+    /**
+     * Attempts to open the "otpauth" URI containing the user's TOTP key,
+     * invoking whichever application may be installed locally for handling
+     * multi-factor authentication.
+     */
+    $scope.openKeyURI = function openKeyURI() {
+        $window.open($scope.field.keyUri);
+    };
+
 }]);