60 lines
1.9 KiB
TypeScript
60 lines
1.9 KiB
TypeScript
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import { spainTaxCatalogProvider } from "@erp/core";
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import { useMoney, usePercentage, useQuantity } from "@erp/core/hooks";
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import { useMemo } from "react";
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import { CustomerInvoiceItemFormData } from "../schemas";
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/**
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* Recalcula todos los importes de una línea usando los hooks de escala.
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*/
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export function useCalculateItemAmounts() {
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const { multiply, percentage: moneyPct, sum } = useMoney();
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const { toNumber: qtyToNumber } = useQuantity();
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const { toNumber: pctToNumber } = usePercentage();
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const taxCatalog = useMemo(() => spainTaxCatalogProvider, []);
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return (item: CustomerInvoiceItemFormData): CustomerInvoiceItemFormData => {
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const qty = qtyToNumber(item.quantity);
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const subtotal = multiply(item.unit_amount, qty);
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const discountPct = pctToNumber(item.discount_percentage);
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const discountAmount =
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discountPct > 0 ? moneyPct(subtotal, discountPct) : { ...subtotal, value: "0" };
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const base = sum([
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subtotal,
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{ ...discountAmount, value: (-Number(discountAmount.value)).toString() },
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]);
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// Impuestos (cada uno es porcentaje sobre la base)
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const taxesBreakdown =
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item.tax_codes?.map((tax_code) => {
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const maybeTax = taxCatalog.findByCode(tax_code);
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if (maybeTax.isNone()) {
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throw Error(`Código de impuesto no encontrado en el catálogo: "${tax_code}"`);
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}
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const tax = maybeTax.unwrap()!;
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const percentage = pctToNumber({ value: tax.value, scale: tax.scale });
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return {
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label: tax.name,
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percentage,
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amount: moneyPct(base, percentage),
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};
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}) ?? [];
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const taxes = sum(taxesBreakdown.map((t) => t.amount));
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const total = sum([base, taxes]);
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return {
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...item,
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subtotal_amount: subtotal,
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discount_amount: discountAmount,
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taxable_amount: base,
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taxes_amount: taxes,
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total_amount: total,
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};
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};
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}
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