fix: Setting the 'isMember' Property During Notification Sending to E…

…nsure Accurate Workspace Membership Verification - EXO-69364. (#3514)

Before this change, users who were not members of a specific workspace
would receive notifications with the 'isMember' property set to null.
After this change, the 'isMember' property now returns the correct value
when users interact with notifications.

component/service/src/main/java/org/exoplatform/social/rest/api/EntityBuilder.java

@@ -752,6 +752,9 @@ public static SpaceEntity buildEntityFromSpace(Space space, String userId, Strin
       spaceEntity.setIsManager(isManager);
       spaceEntity.setIsRedactor(spaceService.isRedactor(space, userId));
       spaceEntity.setIsPublisher(spaceService.isPublisher(space, userId));
+    } else if (space != null && StringUtils.isNotBlank(space.getId())) {
+      Identity currentUserIdentity = RestUtils.getCurrentUserIdentity();
+      spaceEntity.setIsMember(spaceService.isMember(space, currentUserIdentity.getRemoteId()));
     }
 
     PortalConfig portalConfig = getLayoutService().getPortalConfig(new SiteKey(GROUP, space.getGroupId()));