update

server.js

@@ -403,12 +403,19 @@ app.delete('/api/quotes/:id', async (req, res) => {
 app.get('/api/invoices', async (req, res) => {
     try {
         const result = await pool.query(`
-            SELECT i.*, c.name as customer_name, c.qbo_id as customer_qbo_id
+            SELECT i.*, c.name as customer_name, c.qbo_id as customer_qbo_id,
+                   COALESCE((SELECT SUM(pi.amount) FROM payment_invoices pi WHERE pi.invoice_id = i.id), 0) as amount_paid
             FROM invoices i
             LEFT JOIN customers c ON i.customer_id = c.id
             ORDER BY i.created_at DESC
         `);
-        res.json(result.rows);
+        // balance berechnen
+        const rows = result.rows.map(r => ({
+            ...r,
+            amount_paid: parseFloat(r.amount_paid) || 0,
+            balance: (parseFloat(r.total) || 0) - (parseFloat(r.amount_paid) || 0)
+        }));
+        res.json(rows);
     } catch (error) {
         console.error('Error fetching invoices:', error);
         res.status(500).json({ error: 'Error fetching invoices' });
@@ -429,25 +436,30 @@ app.get('/api/invoices/next-number', async (req, res) => {
 app.get('/api/invoices/:id', async (req, res) => {
     const { id } = req.params;
     try {
-        // KORRIGIERT: c.line1, c.line2, c.line3, c.line4 statt c.street
         const invoiceResult = await pool.query(`
-            SELECT i.*, c.name as customer_name, c.line1, c.line2, c.line3, c.line4, c.city, c.state, c.zip_code, c.account_number
+            SELECT i.*, c.name as customer_name, c.qbo_id as customer_qbo_id,
+                   c.line1, c.line2, c.line3, c.line4, c.city, c.state, c.zip_code, c.account_number,
+                   COALESCE((SELECT SUM(pi.amount) FROM payment_invoices pi WHERE pi.invoice_id = i.id), 0) as amount_paid
             FROM invoices i
             LEFT JOIN customers c ON i.customer_id = c.id
             WHERE i.id = $1
         `, [id]);
-        
+
         if (invoiceResult.rows.length === 0) {
             return res.status(404).json({ error: 'Invoice not found' });
         }
-        
+
+        const invoice = invoiceResult.rows[0];
+        invoice.amount_paid = parseFloat(invoice.amount_paid) || 0;
+        invoice.balance = (parseFloat(invoice.total) || 0) - invoice.amount_paid;
+
         const itemsResult = await pool.query(
             'SELECT * FROM invoice_items WHERE invoice_id = $1 ORDER BY item_order',
             [id]
         );
-        
+
         res.json({
-            invoice: invoiceResult.rows[0],
+            invoice: invoice,
             items: itemsResult.rows
         });
     } catch (error) {
@@ -456,6 +468,9 @@ app.get('/api/invoices/:id', async (req, res) => {
     }
 });
 
+
+
+
 app.post('/api/invoices', async (req, res) => {
     const { invoice_number, customer_id, invoice_date, terms, auth_code, tax_exempt, items, created_from_quote_id, scheduled_send_date } = req.body;