100 lines
2.7 KiB
TypeScript
100 lines
2.7 KiB
TypeScript
/**
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* Value Object: Money
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* Represents a monetary amount with currency and platform fee calculation
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*/
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import { RacingDomainValidationError } from '../errors/RacingDomainError';
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export type Currency = 'USD' | 'EUR' | 'GBP';
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export class Money {
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private static readonly PLATFORM_FEE_PERCENTAGE = 0.10;
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readonly amount: number;
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readonly currency: Currency;
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private constructor(amount: number, currency: Currency) {
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this.amount = amount;
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this.currency = currency;
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}
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static create(amount: number, currency: Currency = 'USD'): Money {
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if (amount < 0) {
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throw new RacingDomainValidationError('Money amount cannot be negative');
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}
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if (!Number.isFinite(amount)) {
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throw new RacingDomainValidationError('Money amount must be a finite number');
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}
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return new Money(amount, currency);
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}
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/**
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* Calculate platform fee (10%)
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*/
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calculatePlatformFee(): Money {
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const feeAmount = this.amount * Money.PLATFORM_FEE_PERCENTAGE;
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return new Money(feeAmount, this.currency);
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}
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/**
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* Calculate net amount after platform fee
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*/
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calculateNetAmount(): Money {
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const platformFee = this.calculatePlatformFee();
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return new Money(this.amount - platformFee.amount, this.currency);
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}
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/**
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* Add two money amounts
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*/
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add(other: Money): Money {
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if (this.currency !== other.currency) {
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throw new RacingDomainValidationError('Cannot add money with different currencies');
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}
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return new Money(this.amount + other.amount, this.currency);
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}
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/**
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* Subtract two money amounts
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*/
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subtract(other: Money): Money {
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if (this.currency !== other.currency) {
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throw new RacingDomainValidationError('Cannot subtract money with different currencies');
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}
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const result = this.amount - other.amount;
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if (result < 0) {
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throw new RacingDomainValidationError('Subtraction would result in negative amount');
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}
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return new Money(result, this.currency);
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}
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/**
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* Check if this money is greater than another
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*/
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isGreaterThan(other: Money): boolean {
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if (this.currency !== other.currency) {
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throw new RacingDomainValidationError('Cannot compare money with different currencies');
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}
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return this.amount > other.amount;
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}
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/**
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* Check if this money equals another
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*/
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equals(other: Money): boolean {
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return this.amount === other.amount && this.currency === other.currency;
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}
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/**
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* Format money for display
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*/
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format(): string {
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const formatter = new Intl.NumberFormat('en-US', {
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style: 'currency',
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currency: this.currency,
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minimumFractionDigits: 2,
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maximumFractionDigits: 2,
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});
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return formatter.format(this.amount);
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}
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} |