In this example we will connect to server, set our presence to Do not disturb with status message set to Do not disturb me!.

This example will also print any presence we will receive from our contacts. However for this part to work our roster cannot be empty and at least one of our roster contacts needs to be available.

import Foundation
import TigaseSwift

class PresenceHandlingClient: EventHandler {

    var client: XMPPClient;

    init() {
        Log.initialize();

        client = XMPPClient();

        registerModules();

        print("Notifying event bus that we are interested in SessionEstablishmentSuccessEvent" +
            " which is fired after client is connected");
        client.eventBus.register(handler: self, for: SessionEstablishmentModule.SessionEstablishmentSuccessEvent.TYPE);
        print("Notifying event bus that we are interested in DisconnectedEvent" +
            " which is fired after client is connected");
        client.eventBus.register(handler: self, for: SocketConnector.DisconnectedEvent.TYPE);
        print("Notifying event bus that we are interested in ContactPresenceChangedEvent");
        client.eventBus.register(handler: self, for: PresenceModule.ContactPresenceChanged.TYPE);

        setCredentials(userJID: "sender@domain.com", password: "Pa$$w0rd");

        print("Connecting to server..")
        client.login();
        print("Started async processing..");
    }

    func registerModules() {
        print("Registering modules required for authentication and session establishment");
        _ = client.modulesManager.register(AuthModule());
        _ = client.modulesManager.register(StreamFeaturesModule());
        _ = client.modulesManager.register(SaslModule());
        _ = client.modulesManager.register(ResourceBinderModule());
        _ = client.modulesManager.register(SessionEstablishmentModule());

        print("Registering module for handling presences..");
        _ = client.modulesManager.register(PresenceModule());
    }

    func setCredentials(userJID: String, password: String) {
        let jid = BareJID(userJID);
        client.connectionConfiguration.setUserJID(jid);
        client.connectionConfiguration.setUserPassword(password);
    }

    /// Processing received events
    func handle(event: Event) {
        switch (event) {
        case is SessionEstablishmentModule.SessionEstablishmentSuccessEvent:
            sessionEstablished();
        case is SocketConnector.DisconnectedEvent:
            print("Client is disconnected.");
        case let cpc as PresenceModule.ContactPresenceChanged:
            contactPresenceChanged(cpc);
        default:
            print("unsupported event", event);
        }
    }

    /// Called when session is established
    func sessionEstablished() {
        print("Now we are connected to server and session is ready..");

        let presenceModule: PresenceModule = client.modulesManager.getModule(PresenceModule.ID)!;
        print("Setting presence to DND...");
        presenceModule.setPresence(show: Presence.Show.dnd, status: "Do not distrub me!", priority: 2);
    }

    func contactPresenceChanged(_ cpc: PresenceModule.ContactPresenceChanged) {
        print("We got notified that", cpc.presence.from, "changed presence to", cpc.presence.show);
    }
}