Show a lobby screen in video rooms (#8287)

* Show a lobby screen in video rooms

* Add connecting state

* Test VideoRoomView

* Test VideoLobby

* Get the local video stream with useAsyncMemo

* Clean up code review nits

* Explicitly state what !important is overriding

* Use spacing variables

* Wait for video channel messaging

* Update join button copy

* Show frame on both the lobby and widget

* Force dark theme for video lobby

* Wait for the widget to be ready

* Make VideoChannelStore constructor private

* Allow video lobby to shrink

* Add invite button to video room header

* Show connected members on lobby screen

* Make avatars in video lobby clickable

* Increase video channel store timeout

* Fix Jitsi Meet getting wedged on startup in Chrome and Safari

* Revert "Fix Jitsi Meet getting wedged on startup in Chrome and Safari"

This reverts commit 9f77b8c227c1a5bffa5d91b0c48bf3bbc44d4cec.

* Disable device buttons while connecting

* Factor RoomFacePile into a separate file

* Fix i18n lint

* Fix switching video channels while connected

* Properly limit number of connected members in face pile

* Fix CSS lint

test/components/views/voip/VideoLobby-test.tsx

@@ -0,0 +1,167 @@
+/*
+Copyright 2022 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 React from "react";
+import { mount } from "enzyme";
+import { act } from "react-dom/test-utils";
+import { mocked } from "jest-mock";
+import { RoomMember } from "matrix-js-sdk/src/models/room-member";
+
+import {
+    stubClient,
+    stubVideoChannelStore,
+    mkRoom,
+    mkVideoChannelMember,
+    mockStateEventImplementation,
+} from "../../../test-utils";
+import { MatrixClientPeg } from "../../../../src/MatrixClientPeg";
+import FacePile from "../../../../src/components/views/elements/FacePile";
+import MemberAvatar from "../../../../src/components/views/avatars/MemberAvatar";
+import VideoLobby from "../../../../src/components/views/voip/VideoLobby";
+
+describe("VideoLobby", () => {
+    stubClient();
+    Object.defineProperty(navigator, "mediaDevices", {
+        value: {
+            enumerateDevices: jest.fn(),
+            getUserMedia: () => null,
+        },
+    });
+    jest.spyOn(HTMLMediaElement.prototype, "play").mockImplementation(async () => {});
+
+    const cli = MatrixClientPeg.get();
+    const room = mkRoom(cli, "!1:example.org");
+
+    let store;
+    beforeEach(() => {
+        store = stubVideoChannelStore();
+        mocked(navigator.mediaDevices.enumerateDevices).mockResolvedValue([]);
+    });
+
+    afterEach(() => {
+        jest.clearAllMocks();
+    });
+
+    describe("connected members", () => {
+        it("hides when no one is connected", async () => {
+            const lobby = mount(<VideoLobby room={room} />);
+            // Wait for state to settle
+            await act(() => Promise.resolve());
+            lobby.update();
+
+            expect(lobby.find(".mx_VideoLobby_connectedMembers").exists()).toEqual(false);
+        });
+
+        it("is shown when someone is connected", async () => {
+            mocked(room.currentState).getStateEvents.mockImplementation(mockStateEventImplementation([
+                // A user connected from 2 devices
+                mkVideoChannelMember("@alice:example.org", ["device 1", "device 2"]),
+                // A disconnected user
+                mkVideoChannelMember("@bob:example.org", []),
+                // A user that claims to have a connected device, but has left the room
+                mkVideoChannelMember("@chris:example.org", ["device 1"]),
+            ]));
+
+            mocked(room.currentState).getMember.mockImplementation(userId => ({
+                userId,
+                membership: userId === "@chris:example.org" ? "leave" : "join",
+                name: userId,
+                rawDisplayName: userId,
+                roomId: "!1:example.org",
+                getAvatarUrl: () => {},
+                getMxcAvatarUrl: () => {},
+            }) as unknown as RoomMember);
+
+            const lobby = mount(<VideoLobby room={room} />);
+            // Wait for state to settle
+            await act(() => Promise.resolve());
+            lobby.update();
+
+            // Only Alice should display as connected
+            const memberText = lobby.find(".mx_VideoLobby_connectedMembers").children().at(0).text();
+            expect(memberText).toEqual("1 person connected");
+            expect(lobby.find(FacePile).find(MemberAvatar).props().member.userId).toEqual("@alice:example.org");
+        });
+    });
+
+    describe("device buttons", () => {
+        it("hides when no devices are available", async () => {
+            const lobby = mount(<VideoLobby room={room} />);
+            // Wait for state to settle
+            await act(() => Promise.resolve());
+            lobby.update();
+
+            expect(lobby.find("DeviceButton").children().exists()).toEqual(false);
+        });
+
+        it("hides device list when only one device is available", async () => {
+            mocked(navigator.mediaDevices.enumerateDevices).mockResolvedValue([{
+                deviceId: "1",
+                groupId: "1",
+                label: "Webcam",
+                kind: "videoinput",
+                toJSON: () => {},
+            }]);
+
+            const lobby = mount(<VideoLobby room={room} />);
+            // Wait for state to settle
+            await act(() => Promise.resolve());
+            lobby.update();
+
+            expect(lobby.find(".mx_VideoLobby_deviceListButton").exists()).toEqual(false);
+        });
+
+        it("shows device list when multiple devices are available", async () => {
+            mocked(navigator.mediaDevices.enumerateDevices).mockResolvedValue([
+                {
+                    deviceId: "1",
+                    groupId: "1",
+                    label: "Front camera",
+                    kind: "videoinput",
+                    toJSON: () => {},
+                },
+                {
+                    deviceId: "2",
+                    groupId: "1",
+                    label: "Back camera",
+                    kind: "videoinput",
+                    toJSON: () => {},
+                },
+            ]);
+
+            const lobby = mount(<VideoLobby room={room} />);
+            // Wait for state to settle
+            await act(() => Promise.resolve());
+            lobby.update();
+
+            expect(lobby.find(".mx_VideoLobby_deviceListButton").exists()).toEqual(true);
+        });
+    });
+
+    describe("join button", () => {
+        it("works", async () => {
+            const lobby = mount(<VideoLobby room={room} />);
+            // Wait for state to settle
+            await act(() => Promise.resolve());
+            lobby.update();
+
+            act(() => {
+                lobby.find("AccessibleButton.mx_VideoLobby_joinButton").simulate("click");
+            });
+            expect(store.connect).toHaveBeenCalled();
+        });
+    });
+});