fix: Convert actor type and id in federated signaling messages

The "participants->update" signaling message provides the actor type and
id of the participants from the point of view of the host server.
However, when received by a federated participant, those values need to
be converted to the point of view of the federated server.

Signed-off-by: Daniel Calviño Sánchez <[email protected]>

src/utils/signaling.js

@@ -13,10 +13,11 @@ import { t } from '@nextcloud/l10n'
 import {
 	generateOcsUrl,
 	generateUrl,
+	getBaseUrl,
 } from '@nextcloud/router'
 
 import CancelableRequest from './cancelableRequest.js'
-import { PARTICIPANT } from '../constants.js'
+import { ATTENDEE, PARTICIPANT } from '../constants.js'
 import { EventBus } from '../services/EventBus.js'
 import { rejoinConversation } from '../services/participantsService.js'
 import { pullSignalingMessages } from '../services/signalingService.js'
@@ -1499,6 +1500,26 @@ Signaling.Standalone.prototype.processRoomParticipantsEvent = function(data) {
 				console.error('Unknown room participant event', data)
 			}
 		} else {
+			// Convert participant data in federated conversations
+			if (this.settings.federation?.nextcloudServer) {
+				for (let i = 0; i < data.event.update.users.length; i++) {
+					const user = data.event.update.users[i]
+					if (user.actorType === ATTENDEE.ACTOR_TYPE.USERS) {
+						user.actorType = ATTENDEE.ACTOR_TYPE.FEDERATED_USERS
+						user.actorId = user.actorId + '@' + this.settings.federation.nextcloudServer
+					} else if (user.actorType === ATTENDEE.ACTOR_TYPE.FEDERATED_USERS
+							&& (user.actorId.endsWith('@' + getBaseUrl())
+								|| user.actorId.endsWith('@' + getBaseUrl().replace('https://', ''))
+							)) {
+						let indexOfDomain = user.actorId.indexOf('@' + getBaseUrl())
+						if (indexOfDomain < 0) {
+							indexOfDomain = user.actorId.indexOf('@' + getBaseUrl().replace('https://', ''))
+						}
+						user.actorType = ATTENDEE.ACTOR_TYPE.USERS
+						user.actorId = user.actorId.substring(0, indexOfDomain)
+					}
+				}
+			}
 			// With updated user list
 			this._trigger('usersChanged', [data.event.update.users || []])
 		}