First rough cut of cutting AppTile over to the ClientWidgetApi

src/stores/widgets/StopGapWidgetDriver.ts

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * 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.
+ */
+
+import { Capability, WidgetDriver } from "matrix-widget-api";
+import { iterableUnion } from "../../utils/iterables";
+
+// TODO: Purge this from the universe
+
+export class StopGapWidgetDriver extends WidgetDriver {
+    constructor(private allowedCapabilities: Capability[]) {
+        super();
+    }
+
+    public async validateCapabilities(requested: Set<Capability>): Promise<Set<Capability>> {
+        return iterableUnion(requested, new Set(this.allowedCapabilities));
+    }
+}