interface Beverage {
    getDescription(): string;
}

class Coffee implements Beverage {
    public getDescription(): string {
        return 'Espresso';
    }
}

class Tea implements Beverage {
    public getDescription(): string {
        return 'Black Tea';
    }
}

class WithMilk implements Beverage {
    private component: Beverage;

    constructor(component: Beverage) {
        this.component = component;
    }

    public getDescription(): string {
        return `${this.component.getDescription()} & milk`;
    }
}

class WithSugar implements Beverage {
    private component: Beverage;

    constructor(component: Beverage) {
        this.component = component;
    }

    public getDescription(): string {
        return `${this.component.getDescription()} & sugar`;
    }
}

function clientCode(component: Beverage) {
    console.log(`RESULT: ${component.getDescription()}`);
}


let coffee = new Coffee();
console.log('До оборачивания в декратор:');
console.log(coffee.getDescription());

coffee = new WithSugar(new WithMilk(coffee));
console.log('После:');
console.log(coffee.getDescription());