hwinkel
445 lines
17 KiB
TypeScript
445 lines
17 KiB
TypeScript
import { useState, useCallback } from "react";
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import { useRevalidator } from "react-router";
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import { useForm, useFieldArray } from "react-hook-form";
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import { Button } from "@/components/ui/button";
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import { Input } from "@/components/ui/input";
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import { Label } from "@/components/ui/label";
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import { Textarea } from "@/components/ui/textarea";
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import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
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import { calcItemAmounts, calcItemAmountsKleinunternehmer, calcInvoiceTotals, formatCurrency, TAX_RATES } from "@/lib/tax";
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import { Plus, Trash2 } from "lucide-react";
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import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
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interface Customer {
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id: string;
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name: string;
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}
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interface ItemFormData {
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position: number;
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description: string;
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quantity: string;
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unit: string;
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unitPrice: string;
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taxRate: string;
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netAmount: number;
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taxAmount: number;
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grossAmount: number;
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}
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interface InvoiceFormValues {
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customerId: string;
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issueDate: string;
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deliveryDate: string;
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dueDate: string;
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notes: string;
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items: ItemFormData[];
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}
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interface ServiceOption {
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id: string;
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name: string;
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description: string | null;
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unit: string | null;
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unitPrice: number;
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taxRate: number;
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}
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interface InvoiceFormProps {
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customers: Customer[];
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companyId: string;
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onSubmit: (data: Record<string, unknown>) => Promise<void>;
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defaultValues?: Partial<InvoiceFormValues>;
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defaultKleinunternehmer?: boolean;
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submitLabel?: string;
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services?: ServiceOption[];
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}
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const defaultItem = (): ItemFormData => ({
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position: 1,
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description: "",
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quantity: "1",
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unit: "Stück",
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unitPrice: "0.00",
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taxRate: "19",
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netAmount: 0,
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taxAmount: 0,
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grossAmount: 0,
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});
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/**
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* A form for creating an invoice.
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*
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* @param {Object} props
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* @param {Customer[]} customers - List of customers
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* @param {string} companyId - Company ID
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* @param {(data: Record<string, unknown>) => Promise<void>} onSubmit - Callback for form submission
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* @param {Partial<InvoiceFormValues>} defaultValues - Default values for the form
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* @param {boolean} defaultKleinunternehmer - Whether to use Kleinunternehmer (§19 UStG) by default
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* @param {string} submitLabel - Label for the submit button
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* @param {ServiceOption[]} services - List of services that can be added to the invoice
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*/
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export function InvoiceForm({ customers, companyId, onSubmit, defaultValues, defaultKleinunternehmer = false, submitLabel = "Rechnung erstellen", services = [] }: InvoiceFormProps) {
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const today = new Date().toISOString().split("T")[0];
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const dueDefault = new Date(Date.now() + 30 * 24 * 60 * 60 * 1000).toISOString().split("T")[0];
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const [kleinunternehmer, setKleinunternehmer] = useState(defaultKleinunternehmer);
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const [openDropdown, setOpenDropdown] = useState<number | null>(null);
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const { revalidate } = useRevalidator();
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const { register, handleSubmit, watch, setValue, control, formState: { errors, isSubmitting } } = useForm<InvoiceFormValues>({
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defaultValues: {
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customerId: defaultValues?.customerId ?? "",
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issueDate: defaultValues?.issueDate ?? today,
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deliveryDate: defaultValues?.deliveryDate ?? today,
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dueDate: defaultValues?.dueDate ?? dueDefault,
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notes: defaultValues?.notes ?? "",
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items: defaultValues?.items ?? [defaultItem()],
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},
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});
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const { fields, append, remove } = useFieldArray({ control, name: "items" });
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const watchedItems = watch("items");
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const recalcItem = useCallback((index: number) => {
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const item = watchedItems[index];
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if (!item) return;
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const qty = parseFloat(item.quantity) || 0;
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const price = parseFloat(item.unitPrice) || 0;
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if (kleinunternehmer) {
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const { netAmount, taxAmount, grossAmount } = calcItemAmountsKleinunternehmer(qty, price);
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setValue(`items.${index}.netAmount`, netAmount);
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setValue(`items.${index}.taxAmount`, taxAmount);
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setValue(`items.${index}.grossAmount`, grossAmount);
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} else {
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const rate = parseFloat(item.taxRate) || 0;
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const { netAmount, taxAmount, grossAmount } = calcItemAmounts(qty, price, rate);
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setValue(`items.${index}.netAmount`, netAmount);
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setValue(`items.${index}.taxAmount`, taxAmount);
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setValue(`items.${index}.grossAmount`, grossAmount);
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}
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}, [watchedItems, setValue, kleinunternehmer]);
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const totals = calcInvoiceTotals(
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watchedItems.map((item) => ({
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netAmount: item.netAmount ?? 0,
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taxAmount: item.taxAmount ?? 0,
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grossAmount: item.grossAmount ?? 0,
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}))
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);
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/**
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* Handles form submission by processing the items and calculating the totals.
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*
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* If Kleinunternehmer are enabled, the tax rate for each item is set to 0.
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*
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* If the item does not have a description, the tax rate is set to 0.
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*
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* The function then saves the new services created and revalidates the form if necessary.
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*
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* Finally, the function calls the onSubmit callback with the processed data.
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*/
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async function handleFormSubmit(data: InvoiceFormValues) {
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const items = data.items.map((item, i) => {
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const qty = parseFloat(item.quantity) || 0;
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const price = parseFloat(item.unitPrice) || 0;
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if (kleinunternehmer) {
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const { netAmount, taxAmount, grossAmount } = calcItemAmountsKleinunternehmer(qty, price);
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return {
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position: i + 1,
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description: item.description,
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quantity: qty,
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unit: item.unit || undefined,
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unitPrice: price,
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taxRate: 0,
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netAmount,
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taxAmount,
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grossAmount,
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};
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}
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const rate = parseFloat(item.taxRate) || 0;
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const { netAmount, taxAmount, grossAmount } = calcItemAmounts(qty, price, rate);
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return {
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position: i + 1,
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description: item.description,
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quantity: qty,
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unit: item.unit || undefined,
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unitPrice: price,
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taxRate: rate,
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netAmount,
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taxAmount,
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grossAmount,
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};
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});
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const totals = calcInvoiceTotals(items);
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// Neue Leistungen automatisch speichern
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const newServices = items.filter((item) =>
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item.description.trim() &&
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!services.some(
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(s) => s.name.toLowerCase() === item.description.trim().toLowerCase() ||
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(s.description ?? "").toLowerCase() === item.description.trim().toLowerCase()
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)
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);
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await Promise.all(
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newServices.map((item) =>
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fetch("/api/services", {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({
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companyId,
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name: item.description.trim(),
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unit: item.unit || undefined,
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unitPrice: item.unitPrice,
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taxRate: item.taxRate,
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}),
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})
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)
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);
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if (newServices.length > 0) revalidate();
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await onSubmit({
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companyId,
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customerId: data.customerId,
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issueDate: data.issueDate,
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deliveryDate: data.deliveryDate || undefined,
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dueDate: data.dueDate,
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notes: data.notes || undefined,
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kleinunternehmer,
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items,
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...totals,
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});
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}
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return (
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<form onSubmit={handleSubmit(handleFormSubmit)} className="space-y-6">
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<div className="grid grid-cols-1 md:grid-cols-2 gap-4">
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<div className="space-y-1.5">
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<Label>Kunde *</Label>
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<Select defaultValue={defaultValues?.customerId} onValueChange={(v) => setValue("customerId", v)}>
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<SelectTrigger>
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<SelectValue placeholder="Kunde auswählen..." />
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</SelectTrigger>
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<SelectContent>
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{customers.map((c) => (
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<SelectItem key={c.id} value={c.id}>{c.name}</SelectItem>
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))}
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</SelectContent>
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</Select>
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{errors.customerId && <p className="text-xs text-red-600">Pflichtfeld</p>}
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</div>
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<div className="flex items-end pb-0.5">
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<label className="flex items-center gap-2 cursor-pointer select-none">
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<input
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type="checkbox"
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checked={kleinunternehmer}
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onChange={(e) => {
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setKleinunternehmer(e.target.checked);
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watchedItems.forEach((_, i) => recalcItem(i));
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}}
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className="h-4 w-4 rounded border-gray-300"
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/>
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<span className="text-sm text-gray-700">
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Kleinunternehmer (§19 UStG) — keine Umsatzsteuer
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</span>
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</label>
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</div>
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</div>
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<div className="grid grid-cols-1 md:grid-cols-3 gap-4">
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<div className="space-y-1.5">
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<Label>Rechnungsdatum *</Label>
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<Input type="date" {...register("issueDate", { required: true })} />
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</div>
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<div className="space-y-1.5">
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<Label>Leistungsdatum</Label>
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<Input type="date" {...register("deliveryDate")} />
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</div>
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<div className="space-y-1.5">
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<Label>Fällig am *</Label>
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<Input type="date" {...register("dueDate", { required: true })} />
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</div>
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</div>
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<div>
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<div className="flex items-center justify-between mb-3">
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<h3 className="text-sm font-semibold text-gray-700 uppercase tracking-wide">Rechnungspositionen</h3>
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<Button
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type="button"
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variant="outline"
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size="sm"
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onClick={() => append(defaultItem())}
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>
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<Plus className="h-3.5 w-3.5" /> Position hinzufügen
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</Button>
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</div>
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<div className="border border-gray-200 rounded-xl">
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<div className={`grid gap-2 px-3 py-2 bg-gray-50 border-b border-gray-200 text-xs font-medium text-gray-600 rounded-t-xl ${kleinunternehmer ? "grid-cols-11" : "grid-cols-12"}`}>
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<div className="col-span-4">Beschreibung</div>
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<div className="col-span-1">Menge</div>
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<div className="col-span-1">Einh.</div>
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<div className="col-span-2">{kleinunternehmer ? "Einzelpreis (brutto)" : "Einzelpreis"}</div>
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{!kleinunternehmer && <div className="col-span-1">MwSt.</div>}
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<div className="col-span-2 text-right">Gesamt (brutto)</div>
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<div className="col-span-1"></div>
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</div>
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{fields.map((field, index) => (
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<div key={field.id} className={`grid gap-2 px-3 py-2.5 border-b border-gray-100 last:border-0 items-center ${kleinunternehmer ? "grid-cols-11" : "grid-cols-12"}`}>
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<div className="col-span-4 relative">
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{(() => {
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const descValue = watchedItems[index]?.description ?? "";
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const filtered = services.filter((s) =>
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descValue.length === 0 ||
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s.name.toLowerCase().includes(descValue.toLowerCase()) ||
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(s.description ?? "").toLowerCase().includes(descValue.toLowerCase())
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);
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return (
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<>
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<Input
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value={descValue}
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onChange={(e) => setValue(`items.${index}.description`, e.target.value)}
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onFocus={() => setOpenDropdown(index)}
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onBlur={() => setOpenDropdown(null)}
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placeholder="Leistungsbeschreibung"
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className="text-sm"
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autoComplete="off"
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/>
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{openDropdown === index && services.length > 0 && filtered.length > 0 && (
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<div className="absolute z-50 top-full left-0 right-0 mt-0.5 bg-white border border-gray-200 rounded-md shadow-lg max-h-48 overflow-y-auto">
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{filtered.map((s) => (
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<button
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key={s.id}
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type="button"
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className="w-full text-left px-3 py-2 text-sm hover:bg-gray-50 flex flex-col"
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onMouseDown={(e) => {
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e.preventDefault();
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setValue(`items.${index}.description`, s.description ?? s.name);
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setValue(`items.${index}.unit`, s.unit ?? "Stück");
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setValue(`items.${index}.unitPrice`, String(s.unitPrice));
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setValue(`items.${index}.taxRate`, String(s.taxRate));
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setOpenDropdown(null);
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setTimeout(() => recalcItem(index), 0);
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}}
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>
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<span className="font-medium text-gray-800">{s.name}</span>
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{s.description && <span className="text-xs text-gray-400 truncate">{s.description}</span>}
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</button>
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))}
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</div>
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)}
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</>
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);
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})()}
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</div>
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<div className="col-span-1">
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<Input
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{...register(`items.${index}.quantity`)}
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className="text-sm text-right"
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onBlur={() => recalcItem(index)}
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/>
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</div>
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<div className="col-span-1">
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<Input
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{...register(`items.${index}.unit`)}
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placeholder="Stück"
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className="text-sm"
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/>
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</div>
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<div className="col-span-2">
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<Input
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{...register(`items.${index}.unitPrice`)}
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className="text-sm text-right"
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onBlur={() => recalcItem(index)}
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/>
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</div>
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{!kleinunternehmer && (
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<div className="col-span-1">
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<Select
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defaultValue={defaultValues?.items?.[index]?.taxRate ?? "19"}
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onValueChange={(v) => {
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setValue(`items.${index}.taxRate`, v);
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recalcItem(index);
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}}
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>
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<SelectTrigger className="text-sm">
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<SelectValue />
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</SelectTrigger>
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<SelectContent>
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{TAX_RATES.map((r) => (
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<SelectItem key={r.value} value={String(r.value)}>
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{r.value}%
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</SelectItem>
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))}
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</SelectContent>
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</Select>
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</div>
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)}
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<div className="col-span-2 text-right text-sm font-medium text-gray-900">
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{formatCurrency(watchedItems[index]?.grossAmount ?? 0)}
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</div>
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<div className="col-span-1 flex justify-end">
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{fields.length > 1 && (
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<Button
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type="button"
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variant="ghost"
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size="icon"
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className="h-7 w-7 text-red-400 hover:text-red-600 hover:bg-red-50"
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onClick={() => remove(index)}
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>
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<Trash2 className="h-3.5 w-3.5" />
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</Button>
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)}
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</div>
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</div>
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))}
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</div>
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<div className="mt-4 flex justify-end">
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<div className="w-64 space-y-1.5">
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{kleinunternehmer ? (
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<>
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<div className="flex justify-between text-base font-semibold text-gray-900 border-t border-gray-200 pt-1.5">
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<span>Gesamtbetrag</span>
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<span>{formatCurrency(totals.grossTotal)}</span>
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</div>
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<p className="text-xs text-gray-500 pt-1">
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Dieser Rechnungsbetrag enthält nach §19 Abs. 1 UStG keine USt.
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</p>
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</>
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) : (
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<>
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<div className="flex justify-between text-sm text-gray-600">
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<span>Netto</span>
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<span>{formatCurrency(totals.netTotal)}</span>
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</div>
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<div className="flex justify-between text-sm text-gray-600">
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<span>MwSt.</span>
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<span>{formatCurrency(totals.taxTotal)}</span>
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</div>
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<div className="flex justify-between text-base font-semibold text-gray-900 border-t border-gray-200 pt-1.5">
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<span>Gesamt (brutto)</span>
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<span>{formatCurrency(totals.grossTotal)}</span>
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</div>
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</>
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)}
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</div>
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</div>
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</div>
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<div className="space-y-1.5">
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<Label>Anmerkungen</Label>
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<Textarea {...register("notes")} placeholder="Zahlungsbedingungen, Hinweise..." rows={3} />
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</div>
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<div className="flex justify-end pt-2">
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<Button type="submit" disabled={isSubmitting} size="lg">
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{isSubmitting ? "Speichere..." : submitLabel}
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</Button>
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</div>
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</form>
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);
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}
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