hwinkel
41 lines
1.3 KiB
TypeScript
41 lines
1.3 KiB
TypeScript
export const TAX_RATES = [
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{ label: "19% MwSt. (Regelsteuersatz)", value: 19 },
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{ label: "7% MwSt. (ermäßigt)", value: 7 },
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{ label: "0% (steuerfrei / §13b UStG)", value: 0 },
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] as const;
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export function calcItemAmounts(
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quantity: number,
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unitPrice: number,
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taxRate: number
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) {
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const netAmount = Math.round(quantity * unitPrice * 100) / 100;
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const taxAmount = Math.round(netAmount * (taxRate / 100) * 100) / 100;
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const grossAmount = Math.round((netAmount + taxAmount) * 100) / 100;
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return { netAmount, taxAmount, grossAmount };
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}
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export function calcInvoiceTotals(
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items: Array<{ netAmount: number; taxAmount: number; grossAmount: number }>
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) {
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const netTotal = items.reduce((sum, i) => sum + i.netAmount, 0);
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const taxTotal = items.reduce((sum, i) => sum + i.taxAmount, 0);
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const grossTotal = items.reduce((sum, i) => sum + i.grossAmount, 0);
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return {
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netTotal: Math.round(netTotal * 100) / 100,
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taxTotal: Math.round(taxTotal * 100) / 100,
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grossTotal: Math.round(grossTotal * 100) / 100,
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};
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}
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export function formatCurrency(amount: number | string): string {
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return new Intl.NumberFormat("de-DE", {
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style: "currency",
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currency: "EUR",
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}).format(Number(amount));
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}
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export function formatDate(date: Date | string): string {
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return new Intl.DateTimeFormat("de-DE").format(new Date(date));
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}
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