customer report

src/routes/accounting.js

@@ -5,7 +5,12 @@
  */
 const express = require('express');
 const router = express.Router();
+const path = require('path');
+const fs = require('fs').promises;
 const accountingService = require('../services/accounting-service');
+const { pool } = require('../config/database');
+const { generatePdfFromHtml, getLogoHtml } = require('../services/pdf-service');
+const { formatDate, formatMoney } = require('../utils/helpers');
 const multer = require('multer');
 
 // Limit aus ENV, default 5 MB. Akzeptierte Werte z.B. "5", "10", "20"
@@ -124,6 +129,113 @@ router.post('/sales-tax/periods/:id/mark-external', async (req, res) => {
     } catch (err) { handleQboError(err, res, 'sales-tax-mark-external'); }
 });
 
+// ─── Customer Revenue Report ──────────────────────────────────────
+
+router.get('/reports/customer-revenue', async (req, res) => {
+    try {
+        const { startDate, endDate } = req.query;
+        if (!startDate || !endDate) {
+            return res.status(400).json({ error: 'startDate and endDate are required' });
+        }
+        const result = await pool.query(
+            `SELECT
+                c.id,
+                c.name AS customer_name,
+                COUNT(i.id)::integer AS invoice_count,
+                COALESCE(SUM(i.subtotal), 0)::numeric(10,2) AS total_revenue,
+                (SELECT COALESCE(SUM(i2.subtotal), 0)::numeric(10,2)
+                 FROM invoices i2
+                 WHERE i2.invoice_date >= $1 AND i2.invoice_date <= $2
+                ) AS grand_total
+             FROM customers c
+             JOIN invoices i ON i.customer_id = c.id
+             WHERE i.invoice_date >= $1 AND i.invoice_date <= $2
+             GROUP BY c.id, c.name
+             HAVING COUNT(i.id) > 0
+             ORDER BY total_revenue DESC`,
+            [startDate, endDate]
+        );
+        res.json(result.rows);
+    } catch (err) {
+        console.error('customer-revenue error:', err.message);
+        res.status(500).json({ error: err.message });
+    }
+});
+
+router.get('/reports/customer-revenue/pdf', async (req, res) => {
+    try {
+        const { startDate, endDate } = req.query;
+        if (!startDate || !endDate) {
+            return res.status(400).json({ error: 'startDate and endDate are required' });
+        }
+        const result = await pool.query(
+            `SELECT
+                c.name AS customer_name,
+                COUNT(i.id)::integer AS invoice_count,
+                COALESCE(SUM(i.subtotal), 0)::numeric(10,2) AS total_revenue,
+                (SELECT COALESCE(SUM(i2.subtotal), 0)::numeric(10,2)
+                 FROM invoices i2
+                 WHERE i2.invoice_date >= $1 AND i2.invoice_date <= $2
+                ) AS grand_total
+             FROM customers c
+             JOIN invoices i ON i.customer_id = c.id
+             WHERE i.invoice_date >= $1 AND i.invoice_date <= $2
+             GROUP BY c.id, c.name
+             HAVING COUNT(i.id) > 0
+             ORDER BY total_revenue DESC`,
+            [startDate, endDate]
+        );
+
+        const rows = result.rows;
+        const grandTotal = rows.length > 0 ? parseFloat(rows[0].grand_total) || 0 : 0;
+        const totalInvoices = rows.reduce((s, r) => s + parseInt(r.invoice_count), 0);
+
+        let rowsHtml = '';
+        let rank = 0;
+        for (const r of rows) {
+            rank++;
+            const rev = parseFloat(r.total_revenue) || 0;
+            const pct = grandTotal > 0 ? ((rev / grandTotal) * 100).toFixed(1) : '0.0';
+            rowsHtml += `<tr>
+                <td class="name">${rank}. ${r.customer_name}</td>
+                <td class="number">${r.invoice_count}</td>
+                <td class="number">$${formatMoney(rev)}</td>
+                <td class="number">${pct}%</td>
+            </tr>`;
+        }
+        rowsHtml += `<tr class="footer-row">
+            <td class="total-label">TOTAL (${rows.length} customers)</td>
+            <td class="total-amount">${totalInvoices}</td>
+            <td class="total-amount">$${formatMoney(grandTotal)}</td>
+            <td class="total-amount">100.0%</td>
+        </tr>`;
+
+        const templatePath = path.join(__dirname, '..', '..', 'templates', 'customer-revenue-template.html');
+        let html = await fs.readFile(templatePath, 'utf-8');
+        const logoHTML = await getLogoHtml();
+        const dateRange = `${startDate} to ${endDate}`;
+        const generated = new Date().toISOString().split('T')[0];
+
+        html = html
+            .replace('{{LOGO_HTML}}', logoHTML)
+            .replace('{{DATE_RANGE}}', dateRange)
+            .replace('{{GENERATED_DATE}}', generated)
+            .replace('{{ROWS}}', rowsHtml);
+
+        const pdf = await generatePdfFromHtml(html);
+
+        res.set({
+            'Content-Type': 'application/pdf',
+            'Content-Length': pdf.length,
+            'Content-Disposition': `attachment; filename="Customer-Revenue-${startDate}-to-${endDate}.pdf"`
+        });
+        res.end(pdf, 'binary');
+    } catch (err) {
+        console.error('customer-revenue pdf error:', err.message);
+        res.status(500).json({ error: err.message });
+    }
+});
+
 // ════════════════════════════════════════════════════════════════════
 // Phase 2 Lieferung 1 — Sync + Cache-Reads
 // ════════════════════════════════════════════════════════════════════