Add joining with knock room creation flow.

Also add `WaitForInviteView` after knocking.
And appropriate error views when knock failed or gets rejected.

Signed-off-by: Timo K <toger5@hotmail.de>

src/room/WaitForInviteView.tsx

@@ -0,0 +1,95 @@
+/*
+Copyright 2022-2023 New Vector Ltd
+
+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 { FC, useCallback, useState } from "react";
+import { useTranslation } from "react-i18next";
+import classNames from "classnames";
+import { MatrixClient } from "matrix-js-sdk";
+
+import styles from "./LobbyView.module.css";
+import inCallStyles from "./InCallView.module.css";
+import { Header, LeftNav, RightNav, RoomHeaderInfo } from "../Header";
+import { useLocationNavigation } from "../useLocationNavigation";
+import { SettingsButton } from "../button/Button";
+import { SettingsModal, defaultSettingsTab } from "../settings/SettingsModal";
+import { RoomSummary } from "./useLoadGroupCall";
+
+interface Props {
+  hideHeader: boolean;
+  client: MatrixClient;
+  roomSummary: RoomSummary;
+}
+
+export const WaitForInviteView: FC<Props> = ({
+  hideHeader,
+  client,
+  roomSummary,
+}) => {
+  const { t } = useTranslation();
+  useLocationNavigation();
+
+  const [settingsModalOpen, setSettingsModalOpen] = useState(false);
+  const [settingsTab, setSettingsTab] = useState(defaultSettingsTab);
+
+  const openSettings = useCallback(
+    () => setSettingsModalOpen(true),
+    [setSettingsModalOpen],
+  );
+  const closeSettings = useCallback(
+    () => setSettingsModalOpen(false),
+    [setSettingsModalOpen],
+  );
+
+  // TODO: Unify this component with InCallView, so we can get slick joining
+  // animations and don't have to feel bad about reusing its CSS
+  return (
+    <>
+      <div className={classNames(styles.room, inCallStyles.inRoom)}>
+        {!hideHeader && (
+          <Header>
+            <LeftNav>
+              <RoomHeaderInfo
+                id={roomSummary.room_id ?? "unknown"}
+                name={roomSummary.name ?? "unknown"}
+                avatarUrl={roomSummary.avatar_url ?? null}
+                encrypted={roomSummary.is_encrypted}
+                participantCount={roomSummary.num_joined_members}
+              />
+            </LeftNav>
+            <RightNav> </RightNav>
+          </Header>
+        )}
+        <div className={styles.content}>
+          {t("wait_for_invite.wait_message")}
+        </div>
+        <div className={inCallStyles.footer}>
+          <div className={inCallStyles.buttons}>
+            <SettingsButton onPress={openSettings} />
+          </div>
+        </div>
+      </div>
+      {client && (
+        <SettingsModal
+          client={client}
+          open={settingsModalOpen}
+          onDismiss={closeSettings}
+          tab={settingsTab}
+          onTabChange={setSettingsTab}
+        />
+      )}
+    </>
+  );
+};