Leave A Group

Leave a Group

In order to stop receiving updates and messages for any particular joined group, you will have to leave the group using the leaveGroup() method.

var GUID = "GUID"; // guid of the group to join

CometChat.leaveGroup(GUID).then(
  hasLeft => {
    console.log("Group left successfully:", hasLeft);
  }, error => {
    console.log("Group leaving failed with exception:", error);
  }
);

var GUID: string = "GUID";

CometChat.leaveGroup(GUID).then(
    (hasLeft: boolean) => {
        console.log("Group left successfully:", hasLeft);
    }, (error: CometChat.CometChatException) => {
        console.log("Group leaving failed with exception:", error);
    }
);

Once a group is left, the user will no longer receive any updates or messages pertaining to the group.

Real-time Group Member Left Events

In other words, as a member of a group, how do I know if someone has left it?

If a user leaves any group, The members of the group receive a real-time event in the onGroupMemberLeft() method of the GroupListener class.

CometChat.addGroupListener(
    "UNIQUE_LISTENER_ID",
    new CometChat.GroupListener({
        onGroupMemberLeft: (message, leavingUser, group) => {
            console.log("User left", { message, leavingUser, group });
        }
    })
);

CometChat.addGroupListener(
    "UNIQUE_LISTENER_ID",
    new CometChat.GroupListener({
        onGroupMemberLeft: (message: CometChat.Action, leavingUser: CometChat.User, group: CometChat.Group) => {
            console.log("User left", { message, leavingUser, group });
        }
    })
);

Missed Group Member Left Events

In other words, as a member of a group, how do I know if someone has left it when my app is not running?

When you retrieve the list of previous messages if a member has left any group that the logged-in user is a member of, the list of messages will contain an Action message. An Action message is a sub-class of BaseMessage class.

For the group member left event, in the Action object received, the following fields can help you get the relevant information-

1. action - left
2. actionBy - User object containing the details of the user who left the group
3. actionFor - Group object containing the details of the group the user has left