Mediator.js

class OfficialDealer
{
    constructor()
    {
        this.customers = [];
    }
    
    orderAuto(customer, auto, info)
    {
        const name = customer.getName();
        
        console.log(`Ordeer name ${name}. Order auto is ${auto}`);
        console.log(`Additional info : ${info}`);
        this.addToCustomersList(name);
    }
    
    addToCustomersList(name)
    {
        this.customers.push(name);
    }
    
    getCustomersList()
    {
        return this.customers;
    }
}

class Customer
{
    constructor(name, dealerMediator)
    {
        this.name = name;
        this.dealerMediator = dealerMediator;
    }
    
    getName()
    {
        return this.name;
    }
    
    makeOrder(auto, info)
    {
        this.dealerMediator.orderAuto(this, auto, info);
    }
}

const mediator = new OfficialDealer();

const yauhen = new Customer('Yauhen', mediator);
const valera = new Customer('Valera', mediator);

yauhen.makeOrder('Tesla','With autopilot');
valera.makeOrder('Audi','With parktronik');

console.log(mediator.getCustomersList());