feat(visitors): Checks for visitors support per room.

JitsiConference.js

@@ -3890,6 +3890,15 @@ JitsiConference.prototype.isMembersOnly = function() {
     return Boolean(this.room && this.room.membersOnlyEnabled);
 };
 
+/**
+ * Returns <tt>true</tt> if the room supports visitors feature.
+ *
+ * @returns {boolean} whether conference room has visitors support.
+ */
+JitsiConference.prototype.isVisitorsSupported = function() {
+    return Boolean(this.room && this.room.visitorsSupported);
+};
+
 /**
  * Enables lobby by moderators
  *

JitsiConferenceEventManager.js

@@ -318,6 +318,8 @@ JitsiConferenceEventManager.prototype.setupChatRoomListeners = function() {
 
     this.chatRoomForwarder.forward(XMPPEvents.MUC_MEMBERS_ONLY_CHANGED,
         JitsiConferenceEvents.MEMBERS_ONLY_CHANGED);
+    this.chatRoomForwarder.forward(XMPPEvents.MUC_VISITORS_SUPPORTED_CHANGED,
+        JitsiConferenceEvents.VISITORS_SUPPORTED_CHANGED);
 
     chatRoom.addListener(XMPPEvents.MUC_MEMBER_JOINED,
         conference.onMemberJoined.bind(conference));

JitsiConferenceEvents.spec.ts

@@ -1,5 +1,4 @@
 import * as exported from "./JitsiConferenceEvents";
-import {VISITORS_MESSAGE, VISITORS_REJECTION} from "./JitsiConferenceEvents";
 
 // this test is brittle on purpose because it's designed to ensure that the TypeScript conversion maintains backward compatibility
 
@@ -71,6 +70,7 @@ describe( "/JitsiConferenceEvents members", () => {
         VIDEO_UNMUTE_PERMISSIONS_CHANGED,
         VISITORS_MESSAGE,
         VISITORS_REJECTION,
+        VISITORS_SUPPORTED_CHANGED,
         BOT_TYPE_CHANGED,
         LOBBY_USER_JOINED,
         LOBBY_USER_UPDATED,
@@ -133,6 +133,7 @@ describe( "/JitsiConferenceEvents members", () => {
         expect( RECORDER_STATE_CHANGED ).toBe( 'conference.recorderStateChanged' );
         expect( VIDEO_SIP_GW_AVAILABILITY_CHANGED ).toBe( 'conference.videoSIPGWAvailabilityChanged' );
         expect( VIDEO_SIP_GW_SESSION_STATE_CHANGED ).toBe( 'conference.videoSIPGWSessionStateChanged' );
+        expect( VISITORS_SUPPORTED_CHANGED ).toBe( 'conference.visitorsSupported' );
         expect( START_MUTED_POLICY_CHANGED ).toBe( 'conference.start_muted_policy_changed' );
         expect( STARTED_MUTED ).toBe( 'conference.started_muted' );
         expect( SUBJECT_CHANGED ).toBe( 'conference.subjectChanged' );
@@ -226,6 +227,7 @@ describe( "/JitsiConferenceEvents members", () => {
         expect( JitsiConferenceEvents.USER_ROLE_CHANGED ).toBe( 'conference.roleChanged' );
         expect( JitsiConferenceEvents.USER_STATUS_CHANGED ).toBe( 'conference.statusChanged' );
         expect( JitsiConferenceEvents.VIDEO_UNMUTE_PERMISSIONS_CHANGED ).toBe( 'conference.video_unmute_permissions_changed' );
+        expect( JitsiConferenceEvents.VISITORS_SUPPORTED_CHANGED ).toBe( 'conference.visitorsSupported' );
         expect( JitsiConferenceEvents.BOT_TYPE_CHANGED ).toBe( 'conference.bot_type_changed' );
         expect( JitsiConferenceEvents.LOBBY_USER_JOINED ).toBe( 'conference.lobby.userJoined' );
         expect( JitsiConferenceEvents.LOBBY_USER_UPDATED ).toBe( 'conference.lobby.userUpdated' );

JitsiConferenceEvents.ts

@@ -463,6 +463,11 @@ export enum JitsiConferenceEvents {
      */
     VIDEO_UNMUTE_PERMISSIONS_CHANGED = 'conference.video_unmute_permissions_changed',
 
+    /**
+     * Indicates that the conference has support for visitors.
+     */
+    VISITORS_SUPPORTED_CHANGED = 'conference.visitorsSupported',
+
     /**
      * Event indicating we have received a message from the visitors component.
      */
@@ -551,5 +556,6 @@ export const USER_STATUS_CHANGED = JitsiConferenceEvents.USER_STATUS_CHANGED;
 export const VIDEO_SIP_GW_AVAILABILITY_CHANGED = JitsiConferenceEvents.VIDEO_SIP_GW_AVAILABILITY_CHANGED;
 export const VIDEO_SIP_GW_SESSION_STATE_CHANGED = JitsiConferenceEvents.VIDEO_SIP_GW_SESSION_STATE_CHANGED;
 export const VIDEO_UNMUTE_PERMISSIONS_CHANGED = JitsiConferenceEvents.VIDEO_UNMUTE_PERMISSIONS_CHANGED;
+export const VISITORS_SUPPORTED_CHANGED = JitsiConferenceEvents.VISITORS_SUPPORTED_CHANGED;
 export const VISITORS_MESSAGE = JitsiConferenceEvents.VISITORS_MESSAGE;
 export const VISITORS_REJECTION = JitsiConferenceEvents.VISITORS_REJECTION;

modules/xmpp/ChatRoom.js

@@ -408,6 +408,14 @@ export default class ChatRoom extends Listenable {
                 this.eventEmitter.emit(XMPPEvents.MUC_MEMBERS_ONLY_CHANGED, membersOnly);
             }
 
+            const visitorsSupported = $(result)
+                .find('>query>x[type="result"]>field[var="muc#roominfo_visitorsEnabled"]>value').text() === '1';
+
+            if (visitorsSupported !== this.visitorsSupported) {
+                this.visitorsSupported = visitorsSupported;
+                this.eventEmitter.emit(XMPPEvents.MUC_VISITORS_SUPPORTED_CHANGED, visitorsSupported);
+            }
+
             const roomMetadataEl
                 = $(result).find('>query>x[type="result"]>field[var="muc#roominfo_jitsimetadata"]>value');
             const roomMetadataText = roomMetadataEl?.text();

service/xmpp/XMPPEvents.spec.ts

@@ -58,6 +58,7 @@ describe( "/service/xmpp/XMPPEvents members", () => {
         expect( XMPPEvents.MUC_ROLE_CHANGED ).toBe( 'xmpp.muc_role_changed' );
         expect( XMPPEvents.MUC_LOCK_CHANGED ).toBe( 'xmpp.muc_lock_changed' );
         expect( XMPPEvents.MUC_MEMBERS_ONLY_CHANGED ).toBe( 'xmpp.muc_members_only_changed' );
+        expect( XMPPEvents.MUC_VISITORS_SUPPORTED_CHANGED ).toBe( 'xmpp.muc_visitors_supported_changed' );
         expect( XMPPEvents.PARTICIPANT_AUDIO_MUTED ).toBe( 'xmpp.audio_muted' );
         expect( XMPPEvents.PARTICIPANT_VIDEO_MUTED ).toBe( 'xmpp.video_muted' );
         expect( XMPPEvents.PARTICIPANT_VIDEO_TYPE_CHANGED ).toBe( 'xmpp.video_type' );
@@ -114,4 +115,4 @@ describe( "/service/xmpp/XMPPEvents members", () => {
         const keys = Object.keys( others );
         expect( keys ).withContext( `Extra members: ${ keys.join( ", " ) }` ).toEqual( [] );
     } );
-} );
+} );

service/xmpp/XMPPEvents.ts

@@ -173,6 +173,9 @@ export enum XMPPEvents {
     // Designates an event indicating that the MUC members only config has changed.
     MUC_MEMBERS_ONLY_CHANGED = 'xmpp.muc_members_only_changed',
 
+    // Designates an event indicating that the MUC visitors support has changed.
+    MUC_VISITORS_SUPPORTED_CHANGED = 'xmpp.muc_visitors_supported_changed',
+
     // Designates an event indicating that a participant in the XMPP MUC has
     // advertised that they have audio muted (or unmuted).
     PARTICIPANT_AUDIO_MUTED = 'xmpp.audio_muted',