Show call support error and disable join button (#2748)

* allow user to end call if error when loading

* show call support missing error if livekit server is not provided

* prevent joining from nav item double click if no livekit support

src/app/cs-api.ts

@@ -20,6 +20,16 @@ export type AutoDiscoveryInfo = Record<string, unknown> & {
   'm.identity_server'?: {
     base_url: string;
   };
+  'org.matrix.msc2965.authentication'?: {
+    account?: string;
+    issuer?: string;
+  };
+  'org.matrix.msc4143.rtc_foci'?: [
+    {
+      livekit_service_url: string;
+      type: 'livekit';
+    }
+  ];
 };
 
 export const autoDiscovery = async (

src/app/features/call-status/CallControl.tsx

@@ -1,14 +1,17 @@
 import { Box, Chip, Icon, IconButton, Icons, Spinner, Text, Tooltip, TooltipProvider } from 'folds';
 import React, { useCallback } from 'react';
+import { useSetAtom } from 'jotai';
 import { StatusDivider } from './components';
 import { CallEmbed, useCallControlState } from '../../plugins/call';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
+import { callEmbedAtom } from '../../state/callEmbed';
 
 type MicrophoneButtonProps = {
   enabled: boolean;
   onToggle: () => Promise<unknown>;
+  disabled?: boolean;
 };
-function MicrophoneButton({ enabled, onToggle }: MicrophoneButtonProps) {
+function MicrophoneButton({ enabled, onToggle, disabled }: MicrophoneButtonProps) {
   return (
     <TooltipProvider
       position="Top"
@@ -27,6 +30,7 @@ function MicrophoneButton({ enabled, onToggle }: MicrophoneButtonProps) {
           size="300"
           onClick={() => onToggle()}
           outlined
+          disabled={disabled}
         >
           <Icon size="100" src={enabled ? Icons.Mic : Icons.MicMute} filled={!enabled} />
         </IconButton>
@@ -38,8 +42,9 @@ function MicrophoneButton({ enabled, onToggle }: MicrophoneButtonProps) {
 type SoundButtonProps = {
   enabled: boolean;
   onToggle: () => void;
+  disabled?: boolean;
 };
-function SoundButton({ enabled, onToggle }: SoundButtonProps) {
+function SoundButton({ enabled, onToggle, disabled }: SoundButtonProps) {
   return (
     <TooltipProvider
       position="Top"
@@ -58,6 +63,7 @@ function SoundButton({ enabled, onToggle }: SoundButtonProps) {
           size="300"
           onClick={() => onToggle()}
           outlined
+          disabled={disabled}
         >
           <Icon
             size="100"
@@ -73,8 +79,9 @@ function SoundButton({ enabled, onToggle }: SoundButtonProps) {
 type VideoButtonProps = {
   enabled: boolean;
   onToggle: () => Promise<unknown>;
+  disabled?: boolean;
 };
-function VideoButton({ enabled, onToggle }: VideoButtonProps) {
+function VideoButton({ enabled, onToggle, disabled }: VideoButtonProps) {
   return (
     <TooltipProvider
       position="Top"
@@ -93,6 +100,7 @@ function VideoButton({ enabled, onToggle }: VideoButtonProps) {
           size="300"
           onClick={() => onToggle()}
           outlined
+          disabled={disabled}
         >
           <Icon
             size="100"
@@ -108,8 +116,9 @@ function VideoButton({ enabled, onToggle }: VideoButtonProps) {
 type ScreenShareButtonProps = {
   enabled: boolean;
   onToggle: () => void;
+  disabled?: boolean;
 };
-function ScreenShareButton({ enabled, onToggle }: ScreenShareButtonProps) {
+function ScreenShareButton({ enabled, onToggle, disabled }: ScreenShareButtonProps) {
   return (
     <TooltipProvider
       position="Top"
@@ -128,6 +137,7 @@ function ScreenShareButton({ enabled, onToggle }: ScreenShareButtonProps) {
           size="300"
           onClick={onToggle}
           outlined
+          disabled={disabled}
         >
           <Icon size="100" src={Icons.ScreenShare} filled={enabled} />
         </IconButton>
@@ -136,8 +146,17 @@ function ScreenShareButton({ enabled, onToggle }: ScreenShareButtonProps) {
   );
 }
 
-export function CallControl({ callEmbed, compact }: { callEmbed: CallEmbed; compact: boolean }) {
+export function CallControl({
+  callEmbed,
+  compact,
+  callJoined,
+}: {
+  callEmbed: CallEmbed;
+  compact: boolean;
+  callJoined: boolean;
+}) {
   const { microphone, video, sound, screenshare } = useCallControlState(callEmbed.control);
+  const setCallEmbed = useSetAtom(callEmbedAtom);
 
   const [hangupState, hangup] = useAsyncCallback(
     useCallback(() => callEmbed.hangup(), [callEmbed])
@@ -145,20 +164,38 @@ export function CallControl({ callEmbed, compact }: { callEmbed: CallEmbed; comp
   const exiting =
     hangupState.status === AsyncStatus.Loading || hangupState.status === AsyncStatus.Success;
 
+  const handleHangup = () => {
+    if (!callJoined) {
+      setCallEmbed(undefined);
+      return;
+    }
+    hangup();
+  };
+
   return (
     <Box shrink="No" alignItems="Center" gap="300">
       <Box alignItems="Inherit" gap="200">
         <MicrophoneButton
           enabled={microphone}
           onToggle={() => callEmbed.control.toggleMicrophone()}
+          disabled={!callJoined}
+        />
+        <SoundButton
+          enabled={sound}
+          onToggle={() => callEmbed.control.toggleSound()}
+          disabled={!callJoined}
         />
-        <SoundButton enabled={sound} onToggle={() => callEmbed.control.toggleSound()} />
         {!compact && <StatusDivider />}
-        <VideoButton enabled={video} onToggle={() => callEmbed.control.toggleVideo()} />
+        <VideoButton
+          enabled={video}
+          onToggle={() => callEmbed.control.toggleVideo()}
+          disabled={!callJoined}
+        />
         {!compact && (
           <ScreenShareButton
             enabled={screenshare}
             onToggle={() => callEmbed.control.toggleScreenshare()}
+            disabled={!callJoined}
           />
         )}
       </Box>
@@ -176,7 +213,7 @@ export function CallControl({ callEmbed, compact }: { callEmbed: CallEmbed; comp
         }
         disabled={exiting}
         outlined
-        onClick={hangup}
+        onClick={handleHangup}
       >
         {!compact && (
           <Text as="span" size="L400">

src/app/features/call-status/CallStatus.tsx

@@ -74,7 +74,7 @@ export function CallStatus({ callEmbed }: CallStatusProps) {
             <CallRoomName room={room} />
           </Box>
         )}
-        <CallControl compact={compact} callEmbed={callEmbed} />
+        <CallControl callJoined={callJoined} compact={compact} callEmbed={callEmbed} />
       </Box>
     </Box>
   );

src/app/features/call/CallView.tsx

@@ -13,10 +13,29 @@ import { useCallMembers, useCallSession } from '../../hooks/useCall';
 import { CallMemberRenderer } from './CallMemberCard';
 import * as css from './styles.css';
 import { CallControls } from './CallControls';
+import { useLivekitSupport } from '../../hooks/useLivekitSupport';
 
-function JoinMessage({ hasParticipant }: { hasParticipant?: boolean }) {
+function LivekitServerMissingMessage() {
+  return (
+    <Text style={{ margin: 'auto', color: color.Critical.Main }} size="L400" align="Center">
+      Your homeserver does not support calling. But you can still join call started by others.
+    </Text>
+  );
+}
+
+function JoinMessage({
+  hasParticipant,
+  livekitSupported,
+}: {
+  hasParticipant?: boolean;
+  livekitSupported?: boolean;
+}) {
   if (hasParticipant) return null;
 
+  if (livekitSupported === false) {
+    return <LivekitServerMissingMessage />;
+  }
+
   return (
     <Text style={{ margin: 'auto' }} size="L400" align="Center">
       Voice chat’s empty — Be the first to hop in!
@@ -43,12 +62,13 @@ function AlreadyInCallMessage() {
 function CallPrescreen() {
   const mx = useMatrixClient();
   const room = useRoom();
+  const livekitSupported = useLivekitSupport();
 
   const powerLevels = usePowerLevelsContext();
   const creators = useRoomCreators(room);
 
   const permissions = useRoomPermissions(creators, powerLevels);
-  const canJoin = permissions.event(StateEvent.GroupCallMemberPrefix, mx.getSafeUserId());
+  const hasPermission = permissions.event(StateEvent.GroupCallMemberPrefix, mx.getSafeUserId());
 
   const callSession = useCallSession(room);
   const callMembers = useCallMembers(room, callSession);
@@ -57,6 +77,8 @@ function CallPrescreen() {
   const callEmbed = useCallEmbed();
   const inOtherCall = callEmbed && callEmbed.roomId !== room.roomId;
 
+  const canJoin = hasPermission && (livekitSupported || hasParticipant);
+
   return (
     <Scroll variant="Surface" hideTrack>
       <Box className={css.CallViewContent} alignItems="Center" justifyContent="Center">
@@ -77,7 +99,11 @@ function CallPrescreen() {
           <PrescreenControls canJoin={canJoin} />
           <Header size="300">
             {!inOtherCall &&
-              (canJoin ? <JoinMessage hasParticipant={hasParticipant} /> : <NoPermissionMessage />)}
+              (hasPermission ? (
+                <JoinMessage hasParticipant={hasParticipant} livekitSupported={livekitSupported} />
+              ) : (
+                <NoPermissionMessage />
+              ))}
             {inOtherCall && <AlreadyInCallMessage />}
           </Header>
         </Box>

src/app/features/room-nav/RoomNavItem.tsx

@@ -57,6 +57,8 @@ import { useCallMembers, useCallSession } from '../../hooks/useCall';
 import { useCallEmbed, useCallStart } from '../../hooks/useCallEmbed';
 import { callChatAtom } from '../../state/callEmbed';
 import { useCallPreferencesAtom } from '../../state/hooks/callPreferences';
+import { useAutoDiscoveryInfo } from '../../hooks/useAutoDiscoveryInfo';
+import { livekitSupport } from '../../hooks/useLivekitSupport';
 
 type RoomNavItemMenuProps = {
   room: Room;
@@ -282,8 +284,14 @@ export function RoomNavItem({
   const startCall = useCallStart(direct);
   const callEmbed = useCallEmbed();
   const callPref = useAtomValue(useCallPreferencesAtom());
+  const autoDiscoveryInfo = useAutoDiscoveryInfo();
 
   const handleStartCall: MouseEventHandler<HTMLAnchorElement> = (evt) => {
+    // Do not join if no livekit support or call is not started by others
+    if (!livekitSupport(autoDiscoveryInfo) && callMembers.length === 0) {
+      return;
+    }
+
     // Do not join if already in call
     if (callEmbed) {
       return;

src/app/hooks/useLivekitSupport.ts

@@ -0,0 +1,16 @@
+import { AutoDiscoveryInfo } from '../cs-api';
+import { useAutoDiscoveryInfo } from './useAutoDiscoveryInfo';
+
+export const livekitSupport = (autoDiscoveryInfo: AutoDiscoveryInfo): boolean => {
+  const rtcFoci = autoDiscoveryInfo['org.matrix.msc4143.rtc_foci'];
+
+  return (
+    Array.isArray(rtcFoci) && rtcFoci.some((info) => typeof info.livekit_service_url === 'string')
+  );
+};
+
+export const useLivekitSupport = (): boolean => {
+  const autoDiscoveryInfo = useAutoDiscoveryInfo();
+
+  return livekitSupport(autoDiscoveryInfo);
+};

src/app/pages/client/AutoDiscovery.tsx

@@ -0,0 +1,32 @@
+import React, { ReactNode, useCallback, useMemo } from 'react';
+import { AutoDiscoveryInfoProvider } from '../../hooks/useAutoDiscoveryInfo';
+import { AsyncStatus, useAsyncCallbackValue } from '../../hooks/useAsyncCallback';
+import { autoDiscovery, AutoDiscoveryInfo } from '../../cs-api';
+import { getMxIdServer } from '../../utils/matrix';
+
+type AutoDiscoveryProps = {
+  userId: string;
+  baseUrl: string;
+  children: ReactNode;
+};
+export function AutoDiscovery({ userId, baseUrl, children }: AutoDiscoveryProps) {
+  const [state] = useAsyncCallbackValue(
+    useCallback(async () => {
+      const server = getMxIdServer(userId);
+      return autoDiscovery(fetch, server ?? userId);
+    }, [userId])
+  );
+
+  const [, info] = state.status === AsyncStatus.Success ? state.data : [];
+
+  const fallback: AutoDiscoveryInfo = useMemo(
+    () => ({
+      'm.homeserver': {
+        base_url: baseUrl,
+      },
+    }),
+    [baseUrl]
+  );
+
+  return <AutoDiscoveryInfoProvider value={info ?? fallback}>{children}</AutoDiscoveryInfoProvider>;
+}

src/app/pages/client/ClientRoot.tsx

@@ -35,6 +35,7 @@ import { stopPropagation } from '../../utils/keyboard';
 import { SyncStatus } from './SyncStatus';
 import { AuthMetadataProvider } from '../../hooks/useAuthMetadata';
 import { getFallbackSession } from '../../state/sessions';
+import { AutoDiscovery } from './AutoDiscovery';
 
 function ClientRootLoading() {
   return (
@@ -143,7 +144,7 @@ type ClientRootProps = {
 };
 export function ClientRoot({ children }: ClientRootProps) {
   const [loading, setLoading] = useState(true);
-  const { baseUrl } = getFallbackSession() ?? {};
+  const { baseUrl, userId } = getFallbackSession() ?? {};
 
   const [loadState, loadMatrix] = useAsyncCallback<MatrixClient, Error, []>(
     useCallback(() => {
@@ -183,12 +184,19 @@ export function ClientRoot({ children }: ClientRootProps) {
   );
 
   return (
+    <AutoDiscovery userId={userId!} baseUrl={baseUrl!}>
       <SpecVersions baseUrl={baseUrl!}>
         {mx && <SyncStatus mx={mx} />}
         {loading && <ClientRootOptions mx={mx} />}
         {(loadState.status === AsyncStatus.Error || startState.status === AsyncStatus.Error) && (
           <SplashScreen>
-          <Box direction="Column" grow="Yes" alignItems="Center" justifyContent="Center" gap="400">
+            <Box
+              direction="Column"
+              grow="Yes"
+              alignItems="Center"
+              justifyContent="Center"
+              gap="400"
+            >
               <Dialog>
                 <Box direction="Column" gap="400" style={{ padding: config.space.S400 }}>
                   {loadState.status === AsyncStatus.Error && (
@@ -225,5 +233,6 @@ export function ClientRoot({ children }: ClientRootProps) {
           </MatrixClientProvider>
         )}
       </SpecVersions>
+    </AutoDiscovery>
   );
 }

src/app/plugins/call/CallEmbed.ts

@@ -146,7 +146,7 @@ export class CallEmbed {
 
     let initialMediaEvent = true;
     this.disposables.push(
-      this.listenEvent<ElementMediaStateDetail>(ElementWidgetActions.DeviceMute, (evt) => {
+      this.listenAction<ElementMediaStateDetail>(ElementWidgetActions.DeviceMute, (evt) => {
         if (initialMediaEvent) {
           initialMediaEvent = false;
           this.control.applyState();
@@ -177,18 +177,27 @@ export class CallEmbed {
     return this.call.transport.send(ElementWidgetActions.HangupCall, {});
   }
 
-  public listenEvent<T>(type: string, callback: (event: CustomEvent<T>) => void) {
+  public onPreparing(callback: () => void) {
-    this.call.on(`action:${type}`, callback);
+    return this.listenEvent('preparing', callback);
-    return () => {
+  }
-      this.call.off(`action:${type}`, callback);
+
-    };
+  public onPreparingError(callback: (error: any) => void) {
+    return this.listenEvent('error:preparing', callback);
+  }
+
+  public onReady(callback: () => void) {
+    return this.listenEvent('ready', callback);
+  }
+
+  public onCapabilitiesNotified(callback: () => void) {
+    return this.listenEvent('capabilitiesNotified', callback);
   }
 
   private start() {
     // Room widgets get locked to the room they were added in
     this.call.setViewedRoomId(this.roomId);
     this.disposables.push(
-      this.listenEvent(ElementWidgetActions.JoinCall, this.onCallJoined.bind(this))
+      this.listenAction(ElementWidgetActions.JoinCall, this.onCallJoined.bind(this))
     );
 
     // Populate the map of "read up to" events for this widget with the current event in every room.
@@ -375,4 +384,15 @@ export class CallEmbed {
       }
     }
   }
+
+  public listenAction<T>(type: string, callback: (event: CustomEvent<T>) => void) {
+    return this.listenEvent(`action:${type}`, callback);
+  }
+
+  public listenEvent<T>(type: string, callback: (event: T) => void) {
+    this.call.on(type, callback);
+    return () => {
+      this.call.off(type, callback);
+    };
+  }
 }