Fix calls on homeservers without the unstable thirdparty endpoints (#8931)

* Fix calls on homeservers without the unstable thirdparty endpoints

Calling that endpoint throws an error and aborts the entire call. We do
check if an empty list or null is returned by that endpoint everywhere,
so returning an empty list simulates the thirdparty stuff just not being
found.

Checking for "this.supportsSipNativeVirtual" doesn't necessarily work,
since that might not be set yet and as such breaks calls that rely on
this functionality working.

fixes https://github.com/vector-im/element-web/issues/21680

Signed-off-by: Nicolas Werner <nicolas.werner@hotmail.de>

* Address review comments

* Make log message a warning

Signed-off-by: Nicolas Werner <nicolas.werner@hotmail.de>

src/CallHandler.tsx

@@ -265,28 +265,43 @@ export default class CallHandler extends EventEmitter {
         return this.supportsSipNativeVirtual;
     }
 
-    public pstnLookup(phoneNumber: string): Promise<ThirdpartyLookupResponse[]> {
-        return MatrixClientPeg.get().getThirdpartyUser(
-            this.pstnSupportPrefixed ? PROTOCOL_PSTN_PREFIXED : PROTOCOL_PSTN, {
-                'm.id.phone': phoneNumber,
-            },
-        );
+    public async pstnLookup(phoneNumber: string): Promise<ThirdpartyLookupResponse[]> {
+        try {
+            return await MatrixClientPeg.get().getThirdpartyUser(
+                this.pstnSupportPrefixed ? PROTOCOL_PSTN_PREFIXED : PROTOCOL_PSTN, {
+                    'm.id.phone': phoneNumber,
+                },
+            );
+        } catch (e) {
+            logger.warn('Failed to lookup user from phone number', e);
+            return Promise.resolve([]);
+        }
     }
 
-    public sipVirtualLookup(nativeMxid: string): Promise<ThirdpartyLookupResponse[]> {
-        return MatrixClientPeg.get().getThirdpartyUser(
-            PROTOCOL_SIP_VIRTUAL, {
-                'native_mxid': nativeMxid,
-            },
-        );
+    public async sipVirtualLookup(nativeMxid: string): Promise<ThirdpartyLookupResponse[]> {
+        try {
+            return await MatrixClientPeg.get().getThirdpartyUser(
+                PROTOCOL_SIP_VIRTUAL, {
+                    'native_mxid': nativeMxid,
+                },
+            );
+        } catch (e) {
+            logger.warn('Failed to query SIP identity for user', e);
+            return Promise.resolve([]);
+        }
     }
 
-    public sipNativeLookup(virtualMxid: string): Promise<ThirdpartyLookupResponse[]> {
-        return MatrixClientPeg.get().getThirdpartyUser(
-            PROTOCOL_SIP_NATIVE, {
-                'virtual_mxid': virtualMxid,
-            },
-        );
+    public async sipNativeLookup(virtualMxid: string): Promise<ThirdpartyLookupResponse[]> {
+        try {
+            return await MatrixClientPeg.get().getThirdpartyUser(
+                PROTOCOL_SIP_NATIVE, {
+                    'virtual_mxid': virtualMxid,
+                },
+            );
+        } catch (e) {
+            logger.warn('Failed to query identity for SIP user', e);
+            return Promise.resolve([]);
+        }
     }
 
     private onCallIncoming = (call: MatrixCall): void => {

test/CallHandler-test.ts

@@ -79,7 +79,7 @@ class FakeCall extends EventEmitter {
     roomId: string;
     callId = "fake call id";
 
-    constructor(roomId) {
+    constructor(roomId: string) {
         super();
 
         this.roomId = roomId;
@@ -104,14 +104,14 @@ function untilCallHandlerEvent(callHandler: CallHandler, event: CallHandlerEvent
 describe('CallHandler', () => {
     let dmRoomMap;
     let callHandler;
-    let audioElement;
+    let audioElement: HTMLAudioElement;
     let fakeCall;
 
     // what addresses the app has looked up via pstn and native lookup
     let pstnLookup: string;
     let nativeLookup: string;
 
-    beforeEach(() => {
+    beforeEach(async () => {
         stubClient();
         MatrixClientPeg.get().createCall = roomId => {
             if (fakeCall && fakeCall.roomId !== roomId) {
@@ -151,7 +151,7 @@ describe('CallHandler', () => {
         };
 
         dmRoomMap = {
-            getUserIdForRoomId: roomId => {
+            getUserIdForRoomId: (roomId: string) => {
                 if (roomId === NATIVE_ROOM_ALICE) {
                     return NATIVE_ALICE;
                 } else if (roomId === NATIVE_ROOM_BOB) {
@@ -164,7 +164,7 @@ describe('CallHandler', () => {
                     return null;
                 }
             },
-            getDMRoomsForUserId: userId => {
+            getDMRoomsForUserId: (userId: string) => {
                 if (userId === NATIVE_ALICE) {
                     return [NATIVE_ROOM_ALICE];
                 } else if (userId === NATIVE_BOB) {
@@ -322,3 +322,88 @@ describe('CallHandler', () => {
         expect(callHandler.getCallForRoom(NATIVE_ROOM_CHARLIE)).toBe(fakeCall);
     });
 });
+
+describe('CallHandler without third party protocols', () => {
+    let dmRoomMap;
+    let callHandler: CallHandler;
+    let audioElement: HTMLAudioElement;
+    let fakeCall;
+
+    beforeEach(() => {
+        stubClient();
+        MatrixClientPeg.get().createCall = roomId => {
+            if (fakeCall && fakeCall.roomId !== roomId) {
+                throw new Error("Only one call is supported!");
+            }
+            fakeCall = new FakeCall(roomId);
+            return fakeCall;
+        };
+
+        MatrixClientPeg.get().getThirdpartyProtocols = () => {
+            throw new Error("Endpoint unsupported.");
+        };
+
+        callHandler = new CallHandler();
+        callHandler.start();
+
+        const nativeRoomAlice = mkStubDM(NATIVE_ROOM_ALICE, NATIVE_ALICE);
+
+        MatrixClientPeg.get().getRoom = roomId => {
+            switch (roomId) {
+                case NATIVE_ROOM_ALICE:
+                    return nativeRoomAlice;
+            }
+        };
+
+        dmRoomMap = {
+            getUserIdForRoomId: (roomId: string) => {
+                if (roomId === NATIVE_ROOM_ALICE) {
+                    return NATIVE_ALICE;
+                } else {
+                    return null;
+                }
+            },
+            getDMRoomsForUserId: (userId: string) => {
+                if (userId === NATIVE_ALICE) {
+                    return [NATIVE_ROOM_ALICE];
+                } else {
+                    return [];
+                }
+            },
+        };
+        DMRoomMap.setShared(dmRoomMap);
+
+        MatrixClientPeg.get().getThirdpartyUser = (_proto, _params) => {
+            throw new Error("Endpoint unsupported.");
+        };
+
+        audioElement = document.createElement('audio');
+        audioElement.id = "remoteAudio";
+        document.body.appendChild(audioElement);
+    });
+
+    afterEach(() => {
+        callHandler.stop();
+        DMRoomMap.setShared(null);
+        // @ts-ignore
+        window.mxCallHandler = null;
+        fakeCall = null;
+        MatrixClientPeg.unset();
+
+        document.body.removeChild(audioElement);
+        SdkConfig.unset();
+    });
+
+    it('should still start a native call', async () => {
+        callHandler.placeCall(NATIVE_ROOM_ALICE, CallType.Voice);
+
+        await untilCallHandlerEvent(callHandler, CallHandlerEvent.CallState);
+
+        // Check that a call was started: its room on the protocol level
+        // should be the virtual room
+        expect(fakeCall.roomId).toEqual(NATIVE_ROOM_ALICE);
+
+        // but it should appear to the user to be in thw native room for Bob
+        expect(callHandler.roomIdForCall(fakeCall)).toEqual(NATIVE_ROOM_ALICE);
+    });
+});