Add invoice PDF download and unified payment.

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-05-18 22:01:44 +03:30
parent 8b197e69bc
commit d5e6ab0f68
4 changed files with 191 additions and 72 deletions
@@ -490,6 +490,71 @@ export class BillingService {
    return this.invoiceRepo.save(invoice);
  }

+  generateInvoicePdf(invoice: Invoice): Buffer {
+    const formatAmount = (amount: number) => `${Number(amount || 0).toLocaleString('en-US')} Toman`;
+    const formatDate = (date?: Date) => (date ? new Date(date).toLocaleString('en-US') : '-');
+    const clean = (value: unknown) =>
+      String(value ?? '-')
+        .replace(/[^\x20-\x7E]/g, '?')
+        .replace(/[\\()]/g, (match) => `\\${match}`);
+
+    const lines = [
+      'CloudHost Invoice',
+      `Invoice Number: ${invoice.invoiceNumber}`,
+      `Status: ${invoice.status}`,
+      `Payment Method: ${invoice.paymentMethod || '-'}`,
+      `Customer: ${invoice.user?.email || invoice.userId}`,
+      `Application: ${invoice.application?.name || invoice.applicationId || '-'}`,
+      `Created At: ${formatDate(invoice.createdAt)}`,
+      `Paid At: ${formatDate(invoice.paidAt)}`,
+      '',
+      'Line Items:',
+      ...(invoice.lines || []).map(
+        (line) => `- ${line.label}${line.description ? ` (${line.description})` : ''}: ${formatAmount(Number(line.amount))}`,
+      ),
+      '',
+      `Subtotal: ${formatAmount(Number(invoice.subtotal))}`,
+      `Total: ${formatAmount(Number(invoice.total))}`,
+      `Paid: ${formatAmount(Number(invoice.paidAmount))}`,
+      `Due: ${formatAmount(Number(invoice.dueAmount))}`,
+      `Gateway Tracking: ${invoice.gatewayTrackingCode || '-'}`,
+    ].map(clean);
+
+    const content = [
+      'BT',
+      '/F1 12 Tf',
+      '50 790 Td',
+      '16 TL',
+      ...lines.map((line, index) => `${index === 0 ? '' : 'T* '}(${line}) Tj`),
+      'ET',
+    ].join('\n');
+
+    const objects = [
+      '1 0 obj\n<< /Type /Catalog /Pages 2 0 R >>\nendobj\n',
+      '2 0 obj\n<< /Type /Pages /Kids [3 0 R] /Count 1 >>\nendobj\n',
+      '3 0 obj\n<< /Type /Page /Parent 2 0 R /MediaBox [0 0 595 842] /Resources << /Font << /F1 4 0 R >> >> /Contents 5 0 R >>\nendobj\n',
+      '4 0 obj\n<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica >>\nendobj\n',
+      `5 0 obj\n<< /Length ${Buffer.byteLength(content, 'utf8')} >>\nstream\n${content}\nendstream\nendobj\n`,
+    ];
+
+    let pdf = '%PDF-1.4\n';
+    const offsets = [0];
+    for (const object of objects) {
+      offsets.push(Buffer.byteLength(pdf, 'utf8'));
+      pdf += object;
+    }
+
+    const xrefOffset = Buffer.byteLength(pdf, 'utf8');
+    pdf += `xref\n0 ${objects.length + 1}\n`;
+    pdf += '0000000000 65535 f \n';
+    for (let i = 1; i < offsets.length; i += 1) {
+      pdf += `${String(offsets[i]).padStart(10, '0')} 00000 n \n`;
+    }
+    pdf += `trailer\n<< /Size ${objects.length + 1} /Root 1 0 R >>\nstartxref\n${xrefOffset}\n%%EOF\n`;
+
+    return Buffer.from(pdf, 'utf8');
+  }
+
  /**
   * Calculate cost for an existing Application entity.
   * Used by lifecycle service for auto-renew.