Right panel: view third party invite info without clearing history (#11934)

* add View3pidInvite to actions enum, replace uses

* extract out action handler

* push card instead, test

* comment

src/stores/right-panel/action-handlers/View3pidInvite.ts

@@ -0,0 +1,37 @@
+/*
+Copyright 2023 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 { ActionPayload } from "../../../dispatcher/payloads";
+import RightPanelStore from "../RightPanelStore";
+import { RightPanelPhases } from "../RightPanelStorePhases";
+
+/**
+ * Handle an Action.View3pidInvite action.
+ * Where payload has an event, open the right panel with 3pid room member info without clearing right panel history.
+ * Otherwise, 'close' the 3pid member info by displaying the room member list in the right panel.
+ * @param payload
+ * @param rightPanelStore store instance
+ */
+export const onView3pidInvite = (payload: ActionPayload, rightPanelStore: RightPanelStore): void => {
+    if (payload.event) {
+        rightPanelStore.pushCard({
+            phase: RightPanelPhases.Room3pidMemberInfo,
+            state: { memberInfoEvent: payload.event },
+        });
+    } else {
+        rightPanelStore.showOrHidePanel(RightPanelPhases.RoomMemberList);
+    }
+};