import { Invoice } from '../../types/invoice.types';
import fs from 'fs';
export class XRechnungGenerator {
private invoice: Invoice;
constructor(invoice: Invoice) {
this.invoice = invoice;
}
/**
* Generiert eine XRechnung-XML-Datei nach dem deutschen E-Rechnungs-Standard
*/
public generateXML(): string {
const xml = `
false
urn:cen.eu:en16931:2017#compliant#urn:xoev-de:kosit:standard:xrechnung_2.3
urn:cen.eu:en16931:2017
${this.escapeXml(this.invoice.details.invoiceNumber)}
380
${this.formatDate(this.invoice.details.invoiceDate)}
${this.generateLineItems()}
${this.escapeXml(this.invoice.sender.name)}
${this.escapeXml(this.invoice.sender.address.street)}
${this.escapeXml(this.invoice.sender.address.city)}
${this.escapeXml(this.invoice.sender.address.postalCode)}
DE
${this.escapeXml(this.invoice.sender.vatId || '')}
${this.escapeXml(this.invoice.sender.businessOwner || '')}
${this.escapeXml(this.invoice.sender.contactInfo.phone)}
${this.escapeXml(this.invoice.sender.contactInfo.email)}
${this.escapeXml(this.invoice.recipient.name)}
${this.escapeXml(this.invoice.recipient.address.street)}
${this.escapeXml(this.invoice.recipient.address.city)}
${this.escapeXml(this.invoice.recipient.address.postalCode)}
DE
${this.escapeXml(this.invoice.details.customerNumber)}
${this.formatDate(this.invoice.details.deliveryDate)}
${this.invoice.totals.currency}
30
${this.escapeXml(this.invoice.paymentInfo.bank)}
${this.escapeXml(this.invoice.paymentInfo.iban)}
${this.escapeXml(this.invoice.paymentInfo.bic)}
${this.invoice.totals.netAmount.toFixed(2)}
${this.invoice.totals.netAmount.toFixed(2)}
${this.invoice.totals.vatAmount.toFixed(2)}
${this.invoice.totals.grossAmount.toFixed(2)}
0.00
${this.invoice.totals.grossAmount.toFixed(2)}
${this.invoice.totals.vatAmount.toFixed(2)}
VAT
${this.invoice.totals.netAmount.toFixed(2)}
S
${this.invoice.totals.vatRate.toFixed(2)}
`;
return xml;
}
/**
* Generiert die XML-Datei und speichert sie
*/
public async generateXMLFile(outputPath: string): Promise {
const xml = this.generateXML();
return new Promise((resolve, reject) => {
fs.writeFile(outputPath, xml, 'utf8', (err) => {
if (err) {
reject(err);
} else {
resolve();
}
});
});
}
private generateLineItems(): string {
return this.invoice.items.map((item, index) => `
${index + 1}
${this.escapeXml(item.description)}
${item.unitPrice.toFixed(2)}
${item.quantity}
${item.quantity}
VAT
S
${item.vatRate.toFixed(2)}
${item.total.toFixed(2)}
`).join('');
}
private escapeXml(text: string): string {
return text
.replace(/&/g, '&')
.replace(//g, '>')
.replace(/"/g, '"')
.replace(/'/g, ''');
}
private formatDate(dateString: string): string {
// Konvertiert "DD.MM.YY" zu "YYYYMMDD"
const parts = dateString.split('.');
if (parts.length === 3) {
const day = parts[0].padStart(2, '0');
const month = parts[1].padStart(2, '0');
const year = '20' + parts[2]; // Annahme: YY ist 20YY
return `${year}${month}${day}`;
}
return dateString;
}
}
/**
* Convenience-Funktionen für einfache Verwendung
*/
export async function generateXRechnungXML(invoice: Invoice): Promise {
const generator = new XRechnungGenerator(invoice);
return generator.generateXML();
}
export async function generateXRechnungXMLFile(invoice: Invoice, outputPath: string): Promise {
const generator = new XRechnungGenerator(invoice);
return generator.generateXMLFile(outputPath);
}