54 lines
1.3 KiB
TypeScript
54 lines
1.3 KiB
TypeScript
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/**
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* Toolkit - Currency Formatting
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*
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* Utilities for formatting currency values.
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*/
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export type SupportedCurrency = "JPY" | "USD" | "EUR";
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export interface CurrencyFormatOptions {
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locale?: string;
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showSymbol?: boolean;
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minimumFractionDigits?: number;
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maximumFractionDigits?: number;
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}
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/**
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* Format a number as currency
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*/
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export function formatCurrency(
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amount: number,
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currency: SupportedCurrency = "JPY",
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options: CurrencyFormatOptions = {}
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): string {
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const {
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locale = "en-US",
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showSymbol = true,
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minimumFractionDigits,
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maximumFractionDigits,
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} = options;
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// JPY doesn't use decimal places
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const defaultFractionDigits = currency === "JPY" ? 0 : 2;
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const formatter = new Intl.NumberFormat(locale, {
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style: showSymbol ? "currency" : "decimal",
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currency: showSymbol ? currency : undefined,
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minimumFractionDigits: minimumFractionDigits ?? defaultFractionDigits,
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maximumFractionDigits: maximumFractionDigits ?? defaultFractionDigits,
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});
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return formatter.format(amount);
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}
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/**
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* Parse a currency string to a number
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*/
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export function parseCurrency(value: string): number | null {
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// Remove currency symbols, commas, and whitespace
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const cleaned = value.replace(/[¥$€,\s]/g, "");
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const parsed = Number.parseFloat(cleaned);
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return Number.isFinite(parsed) ? parsed : null;
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}
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