feat: QR-Custom Payment + mode webhook secret GOWA

- tabel custom_qr_payments, service, halaman admin + publik share
- kode unik 20 menit, warning bila bayar setelah batas, manual pay/accept/reject
- webhook payment-notif mencocokkan nominal custom
- menu sidebar QR-Custom Payment
- GOWA secret: auto generate (locked) / manual (simpan lalu locked, ubah)
- versi 0.6.0

services/customQrService.js

@@ -0,0 +1,177 @@
+'use strict';
+/**
+ * customQrService.js — QR nominal bebas (di luar billing) dengan kode unik 20 menit.
+ * Status: pending -> paid | expired -> warning | rejected
+ */
+const crypto = require('crypto');
+const db = require('../config/database');
+const { isQrisAmountTaken } = require('./invoiceQrisService');
+const { logger } = require('../config/logger');
+
+const DURATION_MINUTES = 20;
+
+function nowIso() { return new Date().toISOString(); }
+
+function sweepExpired() {
+  try {
+    db.prepare("UPDATE custom_qr_payments SET status='expired' WHERE status='pending' AND expires_at IS NOT NULL AND expires_at < ?").run(nowIso());
+  } catch (e) {}
+}
+
+function isTaken(amount, excludeId) {
+  if (isQrisAmountTaken(amount, { excludeCustomQrId: excludeId || 0 })) return true;
+  try {
+    const row = db.prepare("SELECT id FROM custom_qr_payments WHERE status IN ('pending','expired') AND amount_unique=? AND id!=? LIMIT 1").get(amount, Number(excludeId) || 0);
+    return !!(row && row.id);
+  } catch (e) { return false; }
+}
+
+function create({ title, category, amount, note, createdBy }) {
+  const base = Math.max(1, Math.floor(Number(amount) || 0));
+  if (!title || !String(title).trim()) throw new Error('Judul wajib diisi.');
+  if (!base) throw new Error('Nominal wajib diisi.');
+
+  let code = 0;
+  let amountUnique = 0;
+  for (let i = 0; i < 60; i++) {
+    const c = 1 + Math.floor(Math.random() * 999);
+    if (!isTaken(base + c)) { code = c; amountUnique = base + c; break; }
+  }
+  if (!amountUnique) {
+    for (let c = 1; c <= 999; c++) {
+      if (!isTaken(base + c)) { code = c; amountUnique = base + c; break; }
+    }
+  }
+  if (!amountUnique) throw new Error('Gagal membuat kode unik (slot 1-999 penuh).');
+
+  const token = crypto.randomBytes(12).toString('hex');
+  const expiresAt = new Date(Date.now() + DURATION_MINUTES * 60 * 1000).toISOString();
+  const r = db.prepare(`
+    INSERT INTO custom_qr_payments (title, category, amount, unique_code, amount_unique, status, share_token, note, created_by, expires_at)
+    VALUES (?, ?, ?, ?, ?, 'pending', ?, ?, ?, ?)
+  `).run(String(title).trim(), String(category || '').trim(), base, code, amountUnique, token, String(note || '').trim(), String(createdBy || ''), expiresAt);
+
+  return getById(Number(r.lastInsertRowid));
+}
+
+function getById(id) {
+  sweepExpired();
+  return db.prepare('SELECT * FROM custom_qr_payments WHERE id=?').get(Number(id) || 0);
+}
+
+function getByToken(token) {
+  sweepExpired();
+  return db.prepare('SELECT * FROM custom_qr_payments WHERE share_token=?').get(String(token || ''));
+}
+
+function list(limit = 100) {
+  sweepExpired();
+  return db.prepare('SELECT * FROM custom_qr_payments ORDER BY id DESC LIMIT ?').all(Math.max(1, Math.min(500, Number(limit) || 100)));
+}
+
+function stats() {
+  sweepExpired();
+  const paid = db.prepare("SELECT COUNT(*) c, COALESCE(SUM(amount_unique),0) t FROM custom_qr_payments WHERE status='paid'").get();
+  const pending = db.prepare("SELECT COUNT(*) c FROM custom_qr_payments WHERE status='pending'").get();
+  const warning = db.prepare("SELECT COUNT(*) c FROM custom_qr_payments WHERE status='warning'").get();
+  const rejected = db.prepare("SELECT COUNT(*) c FROM custom_qr_payments WHERE status='rejected'").get();
+  return {
+    paidCount: Number(paid.c || 0),
+    paidTotal: Number(paid.t || 0),
+    pendingCount: Number(pending.c || 0),
+    warningCount: Number(warning.c || 0),
+    rejectedCount: Number(rejected.c || 0)
+  };
+}
+
+function candidatesByAmount(amount) {
+  sweepExpired();
+  return db.prepare("SELECT * FROM custom_qr_payments WHERE amount_unique=? AND status IN ('pending','expired') ORDER BY id DESC LIMIT 2").all(Number(amount) || 0);
+}
+
+function markManualPaid(id, actor, note) {
+  const row = getById(id);
+  if (!row) throw new Error('Data tidak ditemukan.');
+  if (row.status === 'paid') return row;
+  db.prepare("UPDATE custom_qr_payments SET status='paid', paid_at=NOW_LOCAL(), paid_by=?, resolution_note=? WHERE id=?")
+    .run(String(actor || 'Admin'), String(note || 'Manual pay'), row.id);
+  return getById(id);
+}
+
+function acceptWarning(id, actor, note) {
+  const row = getById(id);
+  if (!row) throw new Error('Data tidak ditemukan.');
+  if (row.status !== 'warning') throw new Error('Hanya pembayaran berstatus warning yang bisa diselesaikan.');
+  db.prepare("UPDATE custom_qr_payments SET status='paid', paid_at=NOW_LOCAL(), paid_by=?, resolved_by=?, resolved_at=NOW_LOCAL(), resolution_note=? WHERE id=?")
+    .run(String(actor || 'Admin'), String(actor || 'Admin'), String(note || 'Diterima setelah 20 menit'), row.id);
+  return getById(id);
+}
+
+function reject(id, actor, note) {
+  const row = getById(id);
+  if (!row) throw new Error('Data tidak ditemukan.');
+  if (row.status === 'rejected') return row;
+  db.prepare("UPDATE custom_qr_payments SET status='rejected', resolved_by=?, resolved_at=NOW_LOCAL(), resolution_note=? WHERE id=?")
+    .run(String(actor || 'Admin'), String(note || 'Refund / ditolak'), row.id);
+  return getById(id);
+}
+
+async function notifyAdminPayment(row, isWarning) {
+  try {
+    const waNotify = require('./waNotifyService');
+    const text = isWarning
+      ? `⚠️ *PEMBAYARAN QR CUSTOM (LEWAT 20 MENIT)*\n\n` +
+        `Judul: ${row.title}\nKategori: ${row.category || '-'}\n` +
+        `Nominal: Rp ${Number(row.amount_unique || 0).toLocaleString('id-ID')}\n` +
+        `Dibuat: ${row.created_at}\n\n` +
+        `Nominal persis masuk setelah batas waktu. Buka menu QR-Custom Payment untuk menyelesaikan atau menolak (refund).`
+      : `✅ *PEMBAYARAN QR CUSTOM DITERIMA*\n\n` +
+        `Judul: ${row.title}\nKategori: ${row.category || '-'}\n` +
+        `Nominal: Rp ${Number(row.amount_unique || 0).toLocaleString('id-ID')}\n\n` +
+        `Pembayaran cocok dalam 20 menit.`;
+    await waNotify.notifyAdmin(text);
+  } catch (e) { logger.warn('[CustomQR] notifyAdmin gagal: ' + e.message); }
+}
+
+function markPaidFromWebhook(id, notifId) {
+  const row = getById(id);
+  if (!row) return null;
+  db.prepare("UPDATE custom_qr_payments SET status='paid', paid_at=NOW_LOCAL(), paid_by='Webhook', notif_id=? WHERE id=?")
+    .run(notifId || null, row.id);
+  const fresh = getById(id);
+  notifyAdminPayment(fresh, false).catch(() => {});
+  return fresh;
+}
+
+function markWarningFromWebhook(id, notifId) {
+  const row = getById(id);
+  if (!row) return null;
+  db.prepare("UPDATE custom_qr_payments SET status='warning', warning_at=NOW_LOCAL(), notif_id=? WHERE id=?")
+    .run(notifId || null, row.id);
+  const fresh = getById(id);
+  notifyAdminPayment(fresh, true).catch(() => {});
+  return fresh;
+}
+
+function isExpired(row) {
+  if (!row || !row.expires_at) return false;
+  const t = new Date(row.expires_at).getTime();
+  return Number.isFinite(t) && t < Date.now();
+}
+
+module.exports = {
+  DURATION_MINUTES,
+  create,
+  list,
+  stats,
+  getById,
+  getByToken,
+  candidatesByAmount,
+  markManualPaid,
+  acceptWarning,
+  reject,
+  markPaidFromWebhook,
+  markWarningFromWebhook,
+  isExpired,
+  sweepExpired
+};