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

services/areaService.js

@@ -0,0 +1,81 @@
+const db = require('../config/database');
+
+/**
+ * Get all areas with customer and collector statistics
+ */
+function getAllAreas() {
+  const sql = `
+    SELECT a.*,
+           (SELECT COUNT(*) FROM customers c WHERE LOWER(TRIM(c.area)) = LOWER(TRIM(a.name))) as customer_count,
+           (SELECT COUNT(*) FROM collectors col WHERE LOWER(TRIM(col.area)) = LOWER(TRIM(a.name))) as collector_count,
+           (SELECT COUNT(*) FROM technicians t WHERE LOWER(TRIM(t.area)) = LOWER(TRIM(a.name))) as technician_count
+    FROM areas a
+    ORDER BY a.name ASC
+  `;
+  return db.prepare(sql).all();
+}
+
+/**
+ * Get single area by ID
+ */
+function getAreaById(id) {
+  return db.prepare('SELECT * FROM areas WHERE id = ?').get(id);
+}
+
+/**
+ * Create new area
+ */
+function createArea(data) {
+  const name = String(data.name || '').trim();
+  if (!name) throw new Error('Nama Area / Wilayah tidak boleh kosong');
+
+  const existing = db.prepare('SELECT id FROM areas WHERE LOWER(TRIM(name)) = LOWER(TRIM(?))').get(name);
+  if (existing) throw new Error(`Area "${name}" sudah ada.`);
+
+  const stmt = db.prepare('INSERT INTO areas (name, description) VALUES (?, ?)');
+  return stmt.run(name, String(data.description || '').trim());
+}
+
+/**
+ * Update existing area
+ */
+function updateArea(id, data) {
+  const oldArea = getAreaById(id);
+  if (!oldArea) throw new Error('Data Area tidak ditemukan');
+
+  const newName = String(data.name || '').trim();
+  if (!newName) throw new Error('Nama Area / Wilayah tidak boleh kosong');
+
+  const existing = db.prepare('SELECT id FROM areas WHERE LOWER(TRIM(name)) = LOWER(TRIM(?)) AND id != ?').get(newName, id);
+  if (existing) throw new Error(`Nama Area "${newName}" sudah digunakan oleh area lain.`);
+
+  const description = String(data.description || '').trim();
+
+  // If area name changed, update references in customers, collectors, technicians
+  if (oldArea.name !== newName) {
+    db.prepare('UPDATE customers SET area = ? WHERE LOWER(TRIM(area)) = LOWER(TRIM(?))').run(newName, oldArea.name);
+    db.prepare('UPDATE collectors SET area = ? WHERE LOWER(TRIM(area)) = LOWER(TRIM(?))').run(newName, oldArea.name);
+    db.prepare('UPDATE technicians SET area = ? WHERE LOWER(TRIM(area)) = LOWER(TRIM(?))').run(newName, oldArea.name);
+  }
+
+  const stmt = db.prepare('UPDATE areas SET name = ?, description = ? WHERE id = ?');
+  return stmt.run(newName, description, id);
+}
+
+/**
+ * Delete area
+ */
+function deleteArea(id) {
+  const area = getAreaById(id);
+  if (!area) throw new Error('Data Area tidak ditemukan');
+
+  return db.prepare('DELETE FROM areas WHERE id = ?').run(id);
+}
+
+module.exports = {
+  getAllAreas,
+  getAreaById,
+  createArea,
+  updateArea,
+  deleteArea
+};