store.js

"use strict";

class Customer {
    constructor(data, movies) {
        this._data = data;
        this._movies = movies;
    }

    get name() {return this._data.name; }
    get rentals() {return this._data.rentals.map(r => new Rental(r, this._movies)); }
    get totalFrequentRenterPoints() {
        return this.rentals.map(r => r.frequentRentalPoints )
            .reduce( (a, b) => a + b );
    }

    get totalAmount() {
        return this.rentals.reduce((total, r) => total + r.amount, 0);
    }
}

class Rental {
    constructor(data, movies) {
        this._data = data;
        this._movies = movies;
    }

    get days() {return this._data.days;}
    get movieID() {return this._data.movieID; }
    get movie() {
        return this._movies[this.movieID]
    }

    get frequentRentalPoints() {
        return (this.movie.code === "new" && this.days > 2) ? 2 : 1;
    }

    get amount() {
        let thisAmount = 0;

        switch (this.movie.code) {
            case "regular":
                thisAmount = 2;
                if (this.days > 2) {
                    thisAmount += (this.days - 2) * 1.5;
                }
                break;
            case "new":
                thisAmount = this.days * 3;
                break;
            case "childrens":
                thisAmount = 1.5;
                if (this.days > 3) {
                    thisAmount += (this.days - 3) * 1.5;
                }
                break;
        }

        return thisAmount;
    }
}

function statement(customerArg, movies) {
    const customer = new Customer(customerArg, movies);

    let result = `Rental Record for ${customer.name}\n`;

    for (let rental of customer.rentals) {
        result += `\t${rental.movie.title}\t${rental.amount}\n`;
    }
    result += `Amount owed is ${customer.totalAmount}\n`;
    result += `You earned ${customer.totalFrequentRenterPoints} frequent renter points\n`;
    return result;
    }

let customer = {
    name: "martin",
    rentals: [{
        "movieID": "F001",
        "days": 3
    }, {
        "movieID": "F002",
        "days": 1
    },]
};

let movies = {
    "F001": {
        "title": "Ran",
        "code": "regular"
    },
    "F002": {
        "title": "Trois Couleurs: Bleu",
        "code": "regular"
    },
    // etc
};

console.log(statement(customer, movies));