Map phone number lookup results to their native rooms

When dialing a phone number, also look to see if there's a corresponding
native user for the resulting user, and if so, go to the native room
for that user.

src/CallHandler.tsx

@@ -521,7 +521,9 @@ export default class CallHandler extends EventEmitter {
             let newNativeAssertedIdentity = newAssertedIdentity;
             if (newAssertedIdentity) {
                 const response = await this.sipNativeLookup(newAssertedIdentity);
-                if (response.length) newNativeAssertedIdentity = response[0].userid;
+                if (response.length && response[0].fields.lookup_success) {
+                    newNativeAssertedIdentity = response[0].userid;
+                }
             }
             console.log(`Asserted identity ${newAssertedIdentity} mapped to ${newNativeAssertedIdentity}`);
 
@@ -862,9 +864,38 @@ export default class CallHandler extends EventEmitter {
                 });
                 break;
             }
+            case Action.DialNumber:
+                this.dialNumber(payload.number);
+                break;
         }
     }
 
+    private async dialNumber(number: string) {
+        const results = await this.pstnLookup(number);
+        if (!results || results.length === 0 || !results[0].userid) {
+            Modal.createTrackedDialog('', '', ErrorDialog, {
+                title: _t("Unable to look up phone number"),
+                description: _t("There was an error looking up the phone number"),
+            });
+            return;
+        }
+        const userId = results[0].userid;
+
+        // Now check to see if this is a virtual user, in which case we should find the
+        // native user
+        const nativeLookupResults = await this.sipNativeLookup(userId);
+        const lookupSuccess = nativeLookupResults.length > 0 && nativeLookupResults[0].fields.lookup_success;
+        const nativeUserId = lookupSuccess ? nativeLookupResults[0].userid : userId;
+        console.log("Looked up " + number + " to " + userId + " and mapped to native user " + nativeUserId);
+
+        const roomId = await ensureDMExists(MatrixClientPeg.get(), nativeUserId);
+
+        dis.dispatch({
+            action: 'view_room',
+            room_id: roomId,
+        });
+    }
+
     setActiveCallRoomId(activeCallRoomId: string) {
         logger.info("Setting call in room " + activeCallRoomId + " active");