Extremely bad support for "temporary widgets"

src/stores/TempWidgetStore.ts

@@ -0,0 +1,54 @@
+/*
+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 { AsyncStoreWithClient } from "./AsyncStoreWithClient";
+import defaultDispatcher from "../dispatcher/dispatcher";
+import { ActionPayload } from "../dispatcher/payloads";
+import Modal, { IModal } from "../Modal";
+import TempWidgetDialog from "../components/views/dialogs/TempWidgetDialog";
+
+interface IState {
+    modal?: IModal<any>;
+    openedFromId?: string;
+}
+
+export class TempWidgetStore extends AsyncStoreWithClient<IState> {
+    private static internalInstance = new TempWidgetStore();
+
+    private constructor() {
+        super(defaultDispatcher, {});
+    }
+
+    public static get instance(): TempWidgetStore {
+        return TempWidgetStore.internalInstance;
+    }
+
+    protected async onAction(payload: ActionPayload): Promise<any> {
+        // nothing
+    }
+
+    public openTempWidget(requestData: any, sourceWidgetId: string) {
+        Modal.createTrackedDialog('Temp Widget', '', TempWidgetDialog, {
+            widgetDefinition: {...requestData},
+            sourceWidgetId: sourceWidgetId,
+            onFinished: (success) => {
+                if (!success) {
+                    TempWidgetDialog.sendExitData(sourceWidgetId, false);
+                }
+            },
+        });
+    }
+}