login_status

type messageType = 'login_status';

// Contains the userId if the user is logged in; otherwise, the value is null.
type Payload = number | null;

// During the app initialization
const removeListener = addZpaxMessageListener('login_status', (message) => {
  /**
   * Handles the SSO login status response from the myzPAX.
   *
   * message.data → number | null
   *
   * Meaning:
   * - null    → User is NOT logged in.
   * - number  → User is logged in, and the value is the SSO User ID.
   *
   * 1. If message.data is null, your app should:
   *      - Clear your session.
   *      - Redirect user to your login flow (if applicable).
   *
   * 2. If message.data is a number, your app should:
   *      - Compare it with your app’s current session user ID.
   *      - If they differ:
   *          → Clear your session and restart the login process.
   *
   * Note:
   * - removeListener() ensures this handler runs only once.
   */
  if (message.data === null) {
    // User is logged out in myzPAX
    // Clear session / redirect
  } else {
    // User is logged in
    // Validate SSO user ID against your session
    // If there is a mismatch, clear the session and restart the login flow.
  }

  removeListener(); // Unsubscribe after handling
});

// Request login status from myzPAX
sendZpaxMessage('login_status');