ISP.ts

// Interface segregation for user actions
interface UserActions {
    login(): void;
    logout(): void;
}

// Separate interfaces for specific actions
interface EmergencyContactable {
    notifyEmergencyContact(message: string): void;
}

// User class implementing specific actions
class User implements UserActions, EmergencyContactable {
    login(): void {
        console.log("User logged in");
    }

    logout(): void {
        console.log("User logged out");
    }

    notifyEmergencyContact(message: string): void {
        console.log("Notifying emergency contact: " + message);
    }
}

// Creating an instance of the User class
const user = new User();

// Invoking methods
user.login();
user.notifyEmergencyContact("This is an emergency message!");
user.logout();