OPEN-ISP v0.5 (pickle-lime) — rilis open-source perdana

Aplikasi billing & manajemen ISP (fiber optic) — PWA pelanggan, portal teknisi & kolektor,
admin panel lengkap, multi-vendor OLT, RADIUS, WhatsApp/Telegram, pembayaran QRIS.

Kredit & lisensi (ISC):
- Base kode & repo: alijayanet/billing-rtrw oleh Alijaya Net — terima kasih banyak
  atas base kode dan repo yang bermanfaat.
- Add-on: GoWA, LibreSpeed/OpenSpeedTest, Uptime Kuma, notification-forwarder.
- Dikembangkan menjadi OPEN-ISP oleh oxpoe — https://github.com/oxpoe/open-isp

middleware/attendanceUpload.js

@@ -0,0 +1,55 @@
+const fs = require('fs');
+const path = require('path');
+const multer = require('multer');
+
+const uploadDir = path.join(__dirname, '../public/uploads/attendance');
+
+function ensureUploadDir() {
+  if (!fs.existsSync(uploadDir)) {
+    fs.mkdirSync(uploadDir, { recursive: true });
+  }
+}
+
+const storage = multer.diskStorage({
+  destination(req, file, cb) {
+    ensureUploadDir();
+    cb(null, uploadDir);
+  },
+  filename(req, file, cb) {
+    const uniqueSuffix = `${Date.now()}-${Math.round(Math.random() * 1e9)}`;
+    cb(null, `attendance-${uniqueSuffix}${path.extname(file.originalname)}`);
+  }
+});
+
+const uploadAttendance = multer({
+  storage,
+  limits: { fileSize: 3 * 1024 * 1024 },
+  fileFilter(req, file, cb) {
+    const allowedTypes = /jpeg|jpg|png|webp/;
+    const extname = allowedTypes.test(path.extname(file.originalname).toLowerCase());
+    const mimetype = allowedTypes.test(file.mimetype);
+    if (mimetype && extname) {
+      return cb(null, true);
+    }
+    cb(new Error('Hanya file gambar yang diperbolehkan (JPEG, PNG, WebP)'));
+  }
+});
+
+function removeAttendanceFile(file) {
+  if (!file) return;
+  const targetPath = typeof file === 'string' ? file : file.path;
+  if (!targetPath) return;
+
+  try {
+    if (fs.existsSync(targetPath)) {
+      fs.unlinkSync(targetPath);
+    }
+  } catch (err) {
+    // Ignore cleanup failures so the main request can finish.
+  }
+}
+
+module.exports = {
+  uploadAttendance,
+  removeAttendanceFile
+};