Used to illustrate Feature sketches and Effect Sketches

Reservation.ts

export class Reservation {
    private duration: number;
    private dailyRate: number;
    private readonly date: Date;
    private readonly customer: Customer;
    private readonly fees: FeeRider[];

    constructor(customer: Customer, duration: number, dailyRate: number, date: Date) {
        this.fees = [];
        this.customer = customer;
        this.duration = duration;
        this.dailyRate = dailyRate;
        this.date = date;
    }

    public extend(additionalDays: number): void {
        this.duration += additionalDays;
    }

    public extendForWeek(): void {
        const weekRemainder = RentalCalendar.weekRemainderFor(this.date);
        const DAYS_PER_WEEK = 7;
        this.extend(weekRemainder);
        this.dailyRate = RateCalculator.computeWeekly(this.customer.getRateCode()) / DAYS_PER_WEEK;
    }

    public addFee(rider: FeeRider): void {
        this.fees.push(rider);
    }

    public getTotalFee(): number {
        return this.getPrincipalFee() + this.getAdditionalFees();
    }

    private getAdditionalFees(): number {
        let total = 0;
        for (const fee of this.fees) {
            total += fee.getAmount();
        }
        return total;
    }

    private getPrincipalFee(): number {
        return this.dailyRate * RateCalculator.rateBase(this.customer) * this.duration;
    }
}