Add suport for showing the scalar UI

src/SdkConfig.js

@@ -0,0 +1,45 @@
+/*
+Copyright 2016 OpenMarket Ltd
+
+Licensed 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.
+*/
+
+var DEFAULTS = {
+    // URL to a page we show in an iframe to configure integrations
+    integrations_ui_url: "https://scalar.vector.im/",
+    // Base URL to the REST interface of the integrations server
+    integrations_rest_url: "https://scalar.vector.im/api",
+};
+
+class SdkConfig {
+
+    static get() {
+        return global.mxReactSdkConfig;
+    }
+
+    static put(cfg) {
+        var defaultKeys = Object.keys(DEFAULTS);
+        for (var i = 0; i < defaultKeys.length; ++i) {
+            if (cfg[defaultKeys[i]] === undefined) {
+                cfg[defaultKeys[i]] = DEFAULTS[defaultKeys[i]];
+            }
+        }
+        global.mxReactSdkConfig = cfg;
+    }
+
+    static unset() {
+        global.mxReactSdkConfig = undefined;
+    }
+}
+
+module.exports = SdkConfig;