Backend: Neue API-Endpunkte hinzugefügt
- /api/dashboard/* - Dashboard Übersicht, Cashflow, Steuer-Preview - /api/customers/* - Kunden CRUD API - /api/invoices/* - Rechnungen CRUD API + Zahlungen Server.js angepasst um neue Routen einzubinden.
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const express = require('express');
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const { Pool } = require('pg');
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const { v4: uuidv4 } = require('uuid');
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const router = express.Router();
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// Database pool
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const pool = new Pool({
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host: process.env.DB_HOST || 'db',
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port: process.env.DB_PORT || 5432,
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database: process.env.DB_NAME || 'steuer',
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user: process.env.DB_USER || 'app',
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password: process.env.DB_PASSWORD || 'app123',
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});
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// GET /api/invoices - Alle Rechnungen
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router.get('/', async (req, res) => {
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try {
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const { status, customer, year, limit = 100, offset = 0 } = req.query;
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let query = `
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SELECT r.*,
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COALESCE(SUM(b.betrag), 0) as bezahlt
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FROM rechnungen r
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LEFT JOIN rechnung_zahlungen b ON r.id = b.rechnung_id
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WHERE 1=1
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`;
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const values = [];
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let paramCount = 0;
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if (status) {
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paramCount++;
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query += ` AND r.status = $${paramCount}`;
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values.push(status);
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}
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if (customer) {
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paramCount++;
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query += ` AND r.kunde ILIKE $${paramCount}`;
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values.push(`%${customer}%`);
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}
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if (year) {
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paramCount++;
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query += ` AND EXTRACT(YEAR FROM r.datum) = $${paramCount}`;
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values.push(year);
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}
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query += ` GROUP BY r.id ORDER BY r.datum DESC LIMIT $${++paramCount} OFFSET $${++paramCount}`;
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values.push(limit, offset);
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const result = await pool.query(query, values);
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// Summen berechnen
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const summaryQuery = `
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SELECT
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COUNT(*) as total_count,
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COALESCE(SUM(betrag), 0) as total_betrag,
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COALESCE(SUM(CASE WHEN status = 'offen' THEN betrag ELSE 0 END), 0) as open_total,
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COALESCE(SUM(CASE WHEN status = 'bezahlt' THEN betrag ELSE 0 END), 0) as paid_total
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FROM rechnungen
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WHERE 1=1
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${status ? ' AND status = $1' : ''}
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${year ? (status ? ' AND' : '') + ` EXTRACT(YEAR FROM datum) = $${status ? 2 : 1}` : ''}
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`;
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const summaryValues = [];
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if (status) summaryValues.push(status);
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if (year) summaryValues.push(year);
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const summaryResult = await pool.query(summaryQuery, summaryValues);
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res.json({
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success: true,
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invoices: result.rows.map(row => ({
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...row,
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betrag: parseFloat(row.betrag) || 0,
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ust_satz: parseFloat(row.ust_satz) || 19,
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bezahlt: parseFloat(row.bezahlt) || 0,
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offen: (parseFloat(row.betrag) || 0) - (parseFloat(row.bezahlt) || 0)
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})),
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summary: {
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total_count: parseInt(summaryResult.rows[0].total_count) || 0,
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total_betrag: parseFloat(summaryResult.rows[0].total_betrag) || 0,
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open_total: parseFloat(summaryResult.rows[0].open_total) || 0,
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paid_total: parseFloat(summaryResult.rows[0].paid_total) || 0
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}
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});
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} catch (error) {
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console.error('Invoices List Error:', error);
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res.status(500).json({ success: false, error: error.message });
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}
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});
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// GET /api/invoices/:id - Einzelne Rechnung
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router.get('/:id', async (req, res) => {
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try {
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const { id } = req.params;
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const [rechnungResult, zahlungenResult] = await Promise.all([
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pool.query('SELECT * FROM rechnungen WHERE id = $1', [id]),
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pool.query(`
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SELECT * FROM rechnung_zahlungen
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WHERE rechnung_id = $1
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ORDER BY datum DESC
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`, [id])
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]);
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if (rechnungResult.rows.length === 0) {
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return res.status(404).json({ success: false, error: 'Rechnung nicht gefunden' });
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}
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const rechnung = rechnungResult.rows[0];
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const zahlungen = zahlungenResult.rows;
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const bezahlt = zahlungen.reduce((sum, z) => sum + parseFloat(z.betrag || 0), 0);
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res.json({
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success: true,
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invoice: {
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...rechnung,
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betrag: parseFloat(rechnung.betrag) || 0,
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ust_satz: parseFloat(rechnung.ust_satz) || 19,
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zahlungen,
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bezahlt,
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offen: (parseFloat(rechnung.betrag) || 0) - bezahlt
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}
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});
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} catch (error) {
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console.error('Invoice Detail Error:', error);
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res.status(500).json({ success: false, error: error.message });
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}
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});
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// POST /api/invoices - Rechnung erstellen
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router.post('/', async (req, res) => {
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try {
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const {
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kunde,
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kunde_email,
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kunde_adresse,
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leistung,
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betrag,
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ust_satz = 19,
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datum,
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faelligkeit,
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rechnung_nr
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} = req.body;
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if (!kunde || !betrag) {
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return res.status(400).json({
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success: false,
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error: 'Kunde und Betrag sind erforderlich'
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});
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}
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// Rechnungsnummer generieren falls nicht angegeben
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let finalRechnungNr = rechnung_nr;
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if (!finalRechnungNr) {
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const countResult = await pool.query(`
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SELECT COUNT(*) FROM rechnungen
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WHERE EXTRACT(YEAR FROM datum) = EXTRACT(YEAR FROM CURRENT_DATE)
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`);
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const count = parseInt(countResult.rows[0].count) + 1;
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finalRechnungNr = `RE-${new Date().getFullYear()}-${String(count).padStart(3, '0')}`;
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}
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const query = `
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INSERT INTO rechnungen (
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id, rechnung_nr, kunde, kunde_email, kunde_adresse,
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leistung, betrag, ust_satz, datum, faelligkeit, status, created_at
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) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, 'offen', NOW())
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RETURNING *
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`;
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const values = [
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uuidv4(),
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finalRechnungNr,
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kunde,
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kunde_email || null,
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kunde_adresse || null,
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leistung || null,
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betrag,
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ust_satz,
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datum || new Date(),
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faelligkeit || null
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];
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const result = await pool.query(query, values);
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res.status(201).json({
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success: true,
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invoice: result.rows[0]
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});
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} catch (error) {
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console.error('Invoice Create Error:', error);
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res.status(500).json({ success: false, error: error.message });
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}
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});
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// PUT /api/invoices/:id - Rechnung aktualisieren
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router.put('/:id', async (req, res) => {
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try {
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const { id } = req.params;
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const {
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kunde, kunde_email, kunde_adresse, leistung,
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betrag, ust_satz, datum, faelligkeit, status
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} = req.body;
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const query = `
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UPDATE rechnungen
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SET
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kunde = COALESCE($1, kunde),
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kunde_email = COALESCE($2, kunde_email),
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kunde_adresse = COALESCE($3, kunde_adresse),
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leistung = COALESCE($4, leistung),
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betrag = COALESCE($5, betrag),
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ust_satz = COALESCE($6, ust_satz),
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datum = COALESCE($7, datum),
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faelligkeit = COALESCE($8, faelligkeit),
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status = COALESCE($9, status)
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WHERE id = $10
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RETURNING *
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`;
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const values = [
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kunde, kunde_email, kunde_adresse, leistung,
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betrag, ust_satz, datum, faelligkeit, status, id
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];
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const result = await pool.query(query, values);
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if (result.rows.length === 0) {
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return res.status(404).json({ success: false, error: 'Rechnung nicht gefunden' });
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}
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res.json({
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success: true,
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invoice: result.rows[0]
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});
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} catch (error) {
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console.error('Invoice Update Error:', error);
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res.status(500).json({ success: false, error: error.message });
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}
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});
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// DELETE /api/invoices/:id - Rechnung löschen
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router.delete('/:id', async (req, res) => {
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try {
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const { id } = req.params;
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// Lösche zuerst Zahlungen
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await pool.query('DELETE FROM rechnung_zahlungen WHERE rechnung_id = $1', [id]);
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const result = await pool.query('DELETE FROM rechnungen WHERE id = $1 RETURNING *', [id]);
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if (result.rows.length === 0) {
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return res.status(404).json({ success: false, error: 'Rechnung nicht gefunden' });
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}
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res.json({
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success: true,
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message: 'Rechnung erfolgreich gelöscht',
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deleted: result.rows[0]
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});
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} catch (error) {
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console.error('Invoice Delete Error:', error);
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res.status(500).json({ success: false, error: error.message });
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}
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});
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// POST /api/invoices/:id/payment - Zahlung hinzufügen
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router.post('/:id/payment', async (req, res) => {
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try {
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const { id } = req.params;
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const { betrag, datum, methode, notizen } = req.body;
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if (!betrag) {
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return res.status(400).json({ success: false, error: 'Betrag ist erforderlich' });
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}
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const query = `
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INSERT INTO rechnung_zahlungen (id, rechnung_id, betrag, datum, methode, notizen, created_at)
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VALUES ($1, $2, $3, $4, $5, $6, NOW())
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RETURNING *
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`;
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const values = [uuidv4(), id, betrag, datum || new Date(), methode || 'Überweisung', notizen || null];
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const result = await pool.query(query, values);
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// Prüfe ob Rechnung nun vollständig bezahlt
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const [rechnungResult, zahlungenSumResult] = await Promise.all([
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pool.query('SELECT betrag FROM rechnungen WHERE id = $1', [id]),
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pool.query('SELECT COALESCE(SUM(betrag), 0) as total FROM rechnung_zahlungen WHERE rechnung_id = $1', [id])
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]);
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const rechnungBetrag = parseFloat(rechnungResult.rows[0].betrag);
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const bezahlt = parseFloat(zahlungenSumResult.rows[0].total);
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if (bezahlt >= rechnungBetrag) {
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await pool.query(`UPDATE rechnungen SET status = 'bezahlt' WHERE id = $1`, [id]);
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} else if (bezahlt > 0) {
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await pool.query(`UPDATE rechnungen SET status = 'teilweise' WHERE id = $1`, [id]);
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}
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res.json({
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success: true,
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payment: result.rows[0],
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bezahlt,
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offen: rechnungBetrag - bezahlt
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});
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} catch (error) {
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console.error('Invoice Payment Error:', error);
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res.status(500).json({ success: false, error: error.message });
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}
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});
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module.exports = router;
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