bad_interface_segregation_principle.ts

abstract class Employee {
  private name: string;

  constructor(name: string) {
    this.name = name;
  }

  public getName(): string {
    return this.name;
  }

  public abstract getSalary(): number;
  public abstract getCommission(): number;
}

class WaiterEmployee extends Employee {
  private salary: number;
  private salesAmount: number;

  constructor(name: string, salary: number, salesAmount: number) {
    super(name);
    this.salary = salary;
    this.salesAmount = salesAmount;
  }

  // @override
  public getCommission(): number {
    return this.salesAmount * 0.2;
  }
  
  // @override
  public getSalary(): number {
    return this.salary + this.getCommission();
  }
  
  // ...other methods here
}

class SecurityEmployee extends Employee {
  private salary: number;

  constructor(name: string, salary: number) {
    super(name);
    this.salary = salary;
  }

  // @override
  public getCommission(): number {
    return 0;
  }
  
  // @override
  public getSalary() {
    return this.salary;
  }
  
  // ...other methods here
}