GUACAMOLE-422: Define field type which represents the ID of any supported language.

guacamole/src/main/webapp/app/form/controllers/languageFieldController.js

@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+
+/**
+ * Controller for the language field type. The language field type allows the
+ * user to select a language from the set of languages supported by the
+ * Guacamole web application.
+ */
+angular.module('form').controller('languageFieldController', ['$scope', '$injector',
+    function languageFieldController($scope, $injector) {
+
+    // Required services
+    var languageService = $injector.get('languageService');
+    var requestService  = $injector.get('requestService');
+
+    /**
+     * A map of all available language keys to their human-readable
+     * names.
+     *
+     * @type Object.<String, String>
+     */
+    $scope.languages = null;
+
+    // Retrieve defined languages
+    languageService.getLanguages().then(function languagesRetrieved(languages) {
+        $scope.$apply(function updateLanguageOptions() {
+            $scope.languages = languages;
+        });
+    }, requestService.DIE);
+
+    // Interpret undefined/null as empty string
+    $scope.$watch('model', function setModel(model) {
+        if (!model && model !== '')
+            $scope.model = '';
+    });
+
+}]);