Initial Modal Widget work tweaks MSC2790

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/stores/ModalWidgetStore.ts

@@ -0,0 +1,86 @@
+/*
+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, {IHandle, IModal} from "../Modal";
+import ModalWidgetDialog from "../components/views/dialogs/ModalWidgetDialog";
+import ActiveWidgetStore from "../stores/ActiveWidgetStore";
+
+interface IState {
+    modal?: IModal<any>;
+    openedFromId?: string;
+}
+
+export class ModalWidgetStore extends AsyncStoreWithClient<IState> {
+    private static internalInstance = new ModalWidgetStore();
+    private modalInstance: IHandle<void[]> = null;
+    private openSourceWidgetId: string = null;
+
+    private constructor() {
+        super(defaultDispatcher, {});
+    }
+
+    public static get instance(): ModalWidgetStore {
+        return ModalWidgetStore.internalInstance;
+    }
+
+    protected async onAction(payload: ActionPayload): Promise<any> {
+        // nothing
+    }
+
+    public canOpenModalWidget = () => {
+        return !this.modalInstance;
+    };
+
+    public openModalWidget = (requestData: any, sourceWidgetId: string) => {
+        if (this.modalInstance) return;
+        this.openSourceWidgetId = sourceWidgetId;
+        this.modalInstance = Modal.createTrackedDialog('Modal Widget', '', ModalWidgetDialog, {
+            widgetDefinition: {...requestData},
+            sourceWidgetId: sourceWidgetId,
+            onFinished: (success: boolean, data?: any) => {
+                if (!success) {
+                    this.closeModalWidget(sourceWidgetId, {
+                        "m.exited": true,
+                    });
+                } else {
+                    this.closeModalWidget(sourceWidgetId, data);
+                }
+
+                this.openSourceWidgetId = null;
+                this.modalInstance = null;
+            },
+        });
+    };
+
+    public closeModalWidget = (sourceWidgetId: string, data?: any) => {
+        if (!this.modalInstance) return;
+        if (this.openSourceWidgetId === sourceWidgetId) {
+            this.openSourceWidgetId = null;
+            this.modalInstance.close();
+            this.modalInstance = null;
+
+            const sourceMessaging = ActiveWidgetStore.getWidgetMessaging(sourceWidgetId);
+            if (!sourceMessaging) {
+                console.error("No source widget messaging for modal widget");
+                return;
+            }
+            sourceMessaging.sendModalCloseInfo(data);
+        }
+    };
+}