Chain_of_Responsibility.js

class Account
{
    pay(orderPrice)
    {
        if(this.canPay(orderPrice))
        {
            console.log(`Paid ${orderPrice} using ${this.name}`);
        }
        else
        {
            if(this.incomer)
            {
                console.log(`Cannot pay using ${this.name}`);
                this.incomer.pay(orderPrice);
            }
            else
            {
                console.log('Unfortunately, not enough money');
            }
        }
    }
    
    canPay(amount)
    {
        return this.balance >= amount;
    }
    
    setNext(account)
    {
        this.incomer = account;
    }
    
    show()
    {
        console.log(this);
    }
}

class Master extends Account
{
    constructor(balance)
    {
        super();
        this.name = 'Master Card';
        this.balance = balance;
    }
}

class Paypal extends Account
{
    constructor(balance)
    {
        super();
        this.name = 'Paypal';
        this.balance = balance;
    }
}

class Qiwi extends Account
{
    constructor(balance)
    {
        super();
        this.name = "Qiwi";
        this.balance = balance;
    }
}

const master = new Master(100);
const paypal = new Paypal(200);
const qiwi = new Qiwi(500);

master.setNext(paypal);
master.setNext(qiwi);

master.pay(438);

master.show();