app/Code.gs

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+/**
+ * SchoolHub Launcher - Backend Logic
+ * Core architecture: Google Sheets as Database
+ */
+
+const SPREADSHEET_ID = '1oWvHLC2tnLHHO36IxTErSCuvDWobsbI_LTlQwtMYiZU';
+const APP_ID = 'launcher';
+
+// --- CORE ENTRY POINT ---
+
+function doGet() {
+  return HtmlService
+    .createTemplateFromFile('Index')
+    .evaluate()
+    .setTitle('SchoolHub Launcher')
+    .addMetaTag('viewport', 'width=device-width, initial-scale=1')
+    .setXFrameOptionsMode(HtmlService.XFrameOptionsMode.ALLOWALL);
+}
+
+function include(filename) {
+  return HtmlService.createHtmlOutputFromFile(filename).getContent();
+}
+
+// --- DATABASE SETUP ---
+
+function setupDatabase() {
+  const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+
+  const sheets = [
+    { name: 'Users', headers: ['email', 'name', 'phone', 'status', 'unit', 'isAdmin', 'createdAt', 'updatedAt'] },
+    { name: 'Access', headers: ['email', 'appId', 'roles', 'active', 'notes', 'updatedAt'] },
+    { name: 'Apps', headers: ['appId', 'appName', 'appUrl', 'active', 'sortOrder'] },
+    { name: 'AuditLog', headers: ['timestamp', 'email', 'appId', 'action', 'status', 'message', 'actor'] },
+    { name: 'OTP', headers: ['phone', 'code', 'expiresAt'] },
+    { name: 'Sessions', headers: ['sessionId', 'email', 'expiresAt'] },
+    { name: 'SystemDocs', headers: ['docType', 'content', 'updatedAt'] }
+  ];
+
+  sheets.forEach(({ name, headers }) => {
+    let sheet = ss.getSheetByName(name);
+    if (!sheet) sheet = ss.insertSheet(name);
+    
+    // Always update headers to ensure schema is current
+    sheet.getRange(1, 1, 1, headers.length).setValues([headers]);
+  });
+
+  return { ok: true, message: 'Database setup complete. Sheets and headers initialized.' };
+}
+
+// --- JSON SERIALIZATION HELPERS ---
+
+function serializeForClient(value) {
+  if (value === null || value === undefined) return null;
+
+  if (Object.prototype.toString.call(value) === '[object Date]') {
+    return value.toISOString();
+  }
+
+  if (Array.isArray(value)) {
+    return value.map(serializeForClient);
+  }
+
+  if (typeof value === 'object') {
+    const out = {};
+    Object.keys(value).forEach((k) => {
+      out[k] = serializeForClient(value[k]);
+    });
+    return out;
+  }
+
+  return value;
+}
+
+// --- UTILITY HELPERS ---
+
+function normalizeEmail(email) {
+  if (!email) return '';
+  return String(email).trim().toLowerCase();
+}
+
+function normalizeBoolString(value) {
+  return String(value).toUpperCase() === 'TRUE' ? 'TRUE' : 'FALSE';
+}
+
+function isTrue_(value) {
+  return String(value).toUpperCase() === 'TRUE';
+}
+
+function toSafeText_(value) {
+  return value === null || value === undefined ? '' : String(value).trim();
+}
+
+function getCurrentUserEmail() {
+  return normalizeEmail(Session.getActiveUser().getEmail());
+}
+
+function rowsToObjects_(values) {
+  if (!values || values.length < 2) return [];
+  const headers = values[0];
+  const out = [];
+  for (let i = 1; i < values.length; i++) {
+    const row = values[i];
+    const obj = {};
+    for (let c = 0; c < headers.length; c++) obj[headers[c]] = row[c];
+    out.push(obj);
+  }
+  return out;
+}
+
+// --- PRIVATE DATABASE READERS ---
+
+function readUsers_(ss) {
+  const sheet = ss.getSheetByName('Users');
+  if (!sheet) return {};
+  const rows = rowsToObjects_(sheet.getDataRange().getValues());
+  const map = {};
+  rows.forEach((obj) => {
+    const email = normalizeEmail(obj.email);
+    if (email) map[email] = obj;
+  });
+  return map;
+}
+
+function readUsersByEmail_(ss, email) {
+  const users = readUsers_(ss);
+  return users[normalizeEmail(email)] || null;
+}
+
+function readApps_(ss) {
+  const sheet = ss.getSheetByName('Apps');
+  if (!sheet) return [];
+  return rowsToObjects_(sheet.getDataRange().getValues())
+    .filter(app => isTrue_(app.active))
+    .map(app => ({
+      appId: toSafeText_(app.appId),
+      appName: toSafeText_(app.appName),
+      appUrl: toSafeText_(app.appUrl),
+      active: true,
+      sortOrder: Number(app.sortOrder || 0)
+    }));
+}
+
+function readAccessRow_(ss, email, appId) {
+  const sheet = ss.getSheetByName('Access');
+  if (!sheet) return null;
+  const rows = rowsToObjects_(sheet.getDataRange().getValues());
+  return rows.find(r => normalizeEmail(r.email) === normalizeEmail(email) && String(r.appId) === String(appId)) || null;
+}
+
+function readAccessByEmail_(ss, email) {
+  const sheet = ss.getSheetByName('Access');
+  if (!sheet) return [];
+  return rowsToObjects_(sheet.getDataRange().getValues())
+    .filter(r => normalizeEmail(r.email) === normalizeEmail(email));
+}
+
+// --- AUTH & PERMISSIONS LOGIC ---
+
+function getAuthCacheKey_(email, appId) {
+  return `auth_${appId}_${email}`;
+}
+
+function clearAuthCache_(email, appId = APP_ID) {
+  CacheService.getScriptCache().remove(getAuthCacheKey_(email, appId));
+}
+
+function isAllowed(email, appId) {
+  if (!email) return { isAllowed: false, reason: 'Email is missing.' };
+  const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+  const ownerEmail = normalizeEmail(ss.getOwner().getEmail());
+  const users = readUsers_(ss);
+  let user = users[email];
+
+  // Auto-admin for owner
+  if (!user && email === ownerEmail) {
+    const userSheet = ss.getSheetByName('Users');
+    const now = new Date();
+    userSheet.appendRow([email, 'Owner Admin', '', 'active', 'System', 'TRUE', now, now]);
+    user = { email, status: 'active', isAdmin: 'TRUE' };
+    clearAuthCache_(email, appId);
+  }
+
+  if (!user) return { isAllowed: false, reason: 'Email not whitelisted.' };
+  if (String(user.status || '').toLowerCase() !== 'active') return { isAllowed: false, reason: 'Account is inactive.' };
+  if (isTrue_(user.isAdmin)) return { isAllowed: true, reason: '' };
+  if (appId === APP_ID) return { isAllowed: true, reason: '' };
+
+  const access = readAccessRow_(ss, email, appId);
+  if (!access || !isTrue_(access.active)) return { isAllowed: false, reason: 'No active access for this app.' };
+
+  return { isAllowed: true, reason: '' };
+}
+
+function getAuthContext(email, appId) {
+  const cache = CacheService.getScriptCache();
+  const cacheKey = getAuthCacheKey_(email, appId);
+  const cached = cache.get(cacheKey);
+  if (cached) return JSON.parse(cached);
+
+  const allowed = isAllowed(email, appId);
+  if (!allowed.isAllowed) {
+    const denied = { isAllowed: false, reason: allowed.reason, roles: [] };
+    cache.put(cacheKey, JSON.stringify(denied), 300);
+    return denied;
+  }
+
+  const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+  const userRow = readUsersByEmail_(ss, email);
+  const accessRow = readAccessRow_(ss, email, appId);
+
+  const roles = accessRow && accessRow.roles 
+    ? String(accessRow.roles).split(',').map(r => r.trim()).filter(Boolean)
+    : (userRow && isTrue_(userRow.isAdmin) ? ['admin'] : []);
+
+  const result = {
+    isAllowed: true,
+    user: {
+      email: userRow ? userRow.email : email,
+      name: userRow ? (userRow.name || '') : '',
+      unit: userRow ? (userRow.unit || '') : ''
+    },
+    roles,
+    permissions: {
+      canManageUsers: roles.includes('admin') || (userRow && isTrue_(userRow.isAdmin)),
+      canEditApp: roles.includes('editor') || roles.includes('admin'),
+      canViewApp: true
+    }
+  };
+
+  cache.put(cacheKey, JSON.stringify(result), 300);
+  return result;
+}
+
+function getAllowedApps(email) {
+  const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+  const apps = readApps_(ss);
+  const user = readUsersByEmail_(ss, email);
+  
+  if (user && isTrue_(user.isAdmin)) {
+    return apps.sort((a, b) => a.sortOrder - b.sortOrder);
+  }
+
+  const accessRows = readAccessByEmail_(ss, email);
+  const allowedIds = new Set(accessRows.filter(r => isTrue_(r.active)).map(r => String(r.appId)));
+  
+  return apps
+    .filter(a => allowedIds.has(String(a.appId)))
+    .sort((a, b) => a.sortOrder - b.sortOrder);
+}
+
+// --- PUBLIC API: FRONTEND DATA ---
+
+function getInitialData() {
+  try {
+    const email = getCurrentUserEmail();
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const userSheet = ss.getSheetByName('Users');
+    const isSystemEmpty = !userSheet || userSheet.getLastRow() < 2;
+
+    if (isSystemEmpty) {
+      return { ok: true, data: serializeForClient({ isSystemEmpty: true, userEmail: email }) };
+    }
+
+    if (!email) return { ok: true, data: serializeForClient({ needsAuth: true }) };
+
+    const auth = getAuthContext(email, APP_ID);
+    if (!auth.isAllowed) {
+      logAccess({ email, appId: APP_ID, action: 'ACCESS_DENIED', status: 'FAILURE', message: auth.reason });
+      return { ok: false, message: auth.reason };
+    }
+
+    const apps = getAllowedApps(email);
+    logAccess({ email, appId: APP_ID, action: 'ACCESS_GRANTED', status: 'SUCCESS', message: 'User loaded launcher' });
+
+    return {
+      ok: true,
+      data: serializeForClient({
+        user: auth.user,
+        apps,
+        isAdmin: auth.roles.includes('admin')
+      })
+    };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function registerFirstAdmin(name) {
+  try {
+    const email = getCurrentUserEmail();
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('Users');
+    if (sheet && sheet.getLastRow() >= 2) throw new Error('System already initialized.');
+    if (!email) throw new Error('User email not available.');
+
+    const now = new Date();
+    sheet.appendRow([email, toSafeText_(name), '', 'active', 'System Admin', 'TRUE', now, now]);
+    clearAuthCache_(email);
+    return { ok: true };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+// --- PUBLIC API: ADMIN USER MANAGEMENT ---
+
+function getAdminUsers() {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const values = ss.getSheetByName('Users').getDataRange().getValues();
+    return { ok: true, data: serializeForClient(rowsToObjects_(values)) };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function saveUser(userData) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const targetEmail = normalizeEmail(userData.email);
+    if (!targetEmail || !userData.name) throw new Error('Email and Name are required');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('Users');
+    const values = sheet.getDataRange().getValues();
+    const headers = values[0];
+    const emailIdx = headers.indexOf('email');
+
+    let rowIndex = -1;
+    for (let i = 1; i < values.length; i++) {
+      if (normalizeEmail(values[i][emailIdx]) === targetEmail) {
+        rowIndex = i + 1;
+        break;
+      }
+    }
+
+    const now = new Date();
+    const rowValue = headers.map(h => {
+      if (h === 'email') return targetEmail;
+      if (h === 'name') return toSafeText_(userData.name);
+      if (h === 'status') return toSafeText_(userData.status).toLowerCase() === 'inactive' ? 'inactive' : 'active';
+      if (h === 'unit') return toSafeText_(userData.unit);
+      if (h === 'isAdmin') return normalizeBoolString(userData.isAdmin);
+      if (h === 'updatedAt') return now;
+      if (h === 'createdAt' && rowIndex > 0) return values[rowIndex - 1][headers.indexOf('createdAt')];
+      if (h === 'createdAt') return now;
+      return toSafeText_(userData[h]);
+    });
+
+    if (rowIndex > 0) sheet.getRange(rowIndex, 1, 1, rowValue.length).setValues([rowValue]);
+    else sheet.appendRow(rowValue);
+
+    clearAuthCache_(targetEmail);
+    return { ok: true };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function deleteUser(targetEmail) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const userSheet = ss.getSheetByName('Users');
+    const accessSheet = ss.getSheetByName('Access');
+    const normalizedTarget = normalizeEmail(targetEmail);
+
+    const deleteByEmail = (sheet) => {
+      const data = sheet.getDataRange().getValues();
+      const emailIdx = data[0].indexOf('email');
+      for (let i = data.length - 1; i >= 1; i--) {
+        if (normalizeEmail(data[i][emailIdx]) === normalizedTarget) sheet.deleteRow(i + 1);
+      }
+    };
+
+    deleteByEmail(userSheet);
+    deleteByEmail(accessSheet);
+    clearAuthCache_(normalizedTarget);
+    return { ok: true };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+// --- PUBLIC API: ADMIN APP MANAGEMENT ---
+
+function getAdminApps() {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const values = ss.getSheetByName('Apps').getDataRange().getValues();
+    return { ok: true, data: serializeForClient(rowsToObjects_(values)) };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function saveApp(appData) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const appId = toSafeText_(appData.appId);
+    if (!appId || !appData.appName || !appData.appUrl) throw new Error('App ID, Name, and URL are required');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('Apps');
+    const values = sheet.getDataRange().getValues();
+    const headers = values[0];
+    const appIdIdx = headers.indexOf('appId');
+
+    let rowIndex = -1;
+    for (let i = 1; i < values.length; i++) {
+      if (String(values[i][appIdIdx]) === appId) {
+        rowIndex = i + 1;
+        break;
+      }
+    }
+
+    const rowValue = headers.map(h => {
+      if (h === 'appId') return appId;
+      if (h === 'appName') return toSafeText_(appData.appName);
+      if (h === 'appUrl') return toSafeText_(appData.appUrl);
+      if (h === 'active') return normalizeBoolString(appData.active);
+      if (h === 'sortOrder') return Number(appData.sortOrder || 0);
+      return '';
+    });
+
+    if (rowIndex > 0) sheet.getRange(rowIndex, 1, 1, rowValue.length).setValues([rowValue]);
+    else sheet.appendRow(rowValue);
+
+    return { ok: true };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function deleteApp(appId) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('Apps');
+    const data = sheet.getDataRange().getValues();
+    const appIdIdx = data[0].indexOf('appId');
+
+    for (let i = data.length - 1; i >= 1; i--) {
+      if (String(data[i][appIdIdx]) === String(appId)) {
+        sheet.deleteRow(i + 1);
+        return { ok: true };
+      }
+    }
+    throw new Error('App not found');
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+// --- PUBLIC API: ACCESS MANAGEMENT ---
+
+function getAccessForUser(email) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    return { 
+      ok: true, 
+      data: serializeForClient({
+        userAccess: readAccessByEmail_(ss, email),
+        availableApps: readApps_(ss)
+      }) 
+    };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function saveAccess(accessData) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const targetEmail = normalizeEmail(accessData.email);
+    const appId = toSafeText_(accessData.appId);
+    if (!targetEmail || !appId) throw new Error('Email and App ID are required');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('Access');
+    const values = sheet.getDataRange().getValues();
+    const headers = values[0];
+    const emailIdx = headers.indexOf('email');
+    const appIdIdx = headers.indexOf('appId');
+
+    let rowIndex = -1;
+    for (let i = 1; i < values.length; i++) {
+      if (normalizeEmail(values[i][emailIdx]) === targetEmail && String(values[i][appIdIdx]) === appId) {
+        rowIndex = i + 1;
+        break;
+      }
+    }
+
+    const rowValue = headers.map(h => {
+      if (h === 'email') return targetEmail;
+      if (h === 'appId') return appId;
+      if (h === 'roles') return toSafeText_(accessData.roles);
+      if (h === 'active') return normalizeBoolString(accessData.active);
+      if (h === 'notes') return toSafeText_(accessData.notes);
+      if (h === 'updatedAt') return new Date();
+      return '';
+    });
+
+    if (rowIndex > 0) sheet.getRange(rowIndex, 1, 1, rowValue.length).setValues([rowValue]);
+    else sheet.appendRow(rowValue);
+
+    clearAuthCache_(targetEmail);
+    return { ok: true };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function deleteAccess(email, appId) {
+  try {
+    const auth = getAuthContext(getCurrentUserEmail(), APP_ID);
+    if (!auth.roles.includes('admin')) throw new Error('Unauthorized');
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('Access');
+    const data = sheet.getDataRange().getValues();
+    const emailIdx = data[0].indexOf('email');
+    const appIdIdx = data[0].indexOf('appId');
+
+    for (let i = data.length - 1; i >= 1; i--) {
+      if (normalizeEmail(data[i][emailIdx]) === normalizeEmail(email) && String(data[i][appIdIdx]) === String(appId)) {
+        sheet.deleteRow(i + 1);
+      }
+    }
+    clearAuthCache_(email);
+    return { ok: true };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+// --- PUBLIC API: AUTHENTICATION & OTP ---
+
+const GO_WHATSAPP_API_KEY = 'YOUR_API_KEY'; 
+const GO_WHATSAPP_URL = 'https://api.gowhatsapp.com/send';
+
+function sendOTP(phone) {
+  try {
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const users = rowsToObjects_(ss.getSheetByName('Users').getDataRange().getValues());
+    if (!users.find(u => String(u.phone).trim() === String(phone).trim())) {
+      throw new Error('Nomor WhatsApp Anda belum terdaftar.');
+    }
+
+    const code = Math.floor(100000 + Math.random() * 900000).toString();
+    const expiresAt = new Date(Date.now() + 5 * 60 * 1000);
+
+    const otpSheet = ss.getSheetByName('OTP');
+    const otpData = otpSheet.getDataRange().getValues();
+    for (let i = otpData.length - 1; i >= 1; i--) {
+      if (otpData[i][0] === phone) otpSheet.deleteRow(i + 1);
+    }
+    otpSheet.appendRow([phone, code, expiresAt]);
+
+    UrlFetchApp.fetch(GO_WHATSAPP_URL, {
+      method: 'post',
+      contentType: 'application/json',
+      payload: JSON.stringify({
+        apiKey: GO_WHATSAPP_API_KEY,
+        phone: phone,
+        message: `Kode OTP SchoolHub Anda adalah: ${code}. Berlaku selama 5 menit.`
+      }),
+      muteHttpExceptions: true
+    });
+
+    return { ok: true, message: 'OTP telah dikirim ke WhatsApp Anda.' };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function verifyOTP(phone, code) {
+  try {
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const otpData = ss.getSheetByName('OTP').getDataRange().getValues();
+    
+    const validOtp = otpData.find(r => r[0] === phone && String(r[1]) === String(code) && new Date(r[2]) > new Date());
+    if (!validOtp) throw new Error('Kode OTP salah atau kadaluwarsa.');
+
+    const users = rowsToObjects_(ss.getSheetByName('Users').getDataRange().getValues());
+    const user = users.find(u => String(u.phone).trim() === String(phone).trim());
+    if (!user) throw new Error('User tidak ditemukan.');
+
+    const sessionId = Utilities.getUuid();
+    ss.getSheetByName('Sessions').appendRow([sessionId, user.email, new Date(Date.now() + 24 * 60 * 60 * 1000)]);
+
+    return { ok: true, data: { sessionId, email: user.email } };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+function loginWithGoogle() {
+  try {
+    const email = getCurrentUserEmail();
+    if (!email) return { ok: false, message: 'Email tidak terdeteksi.' };
+    
+    const auth = isAllowed(email, APP_ID);
+    if (!auth.isAllowed) return { ok: false, message: auth.reason };
+
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sessionSheet = ss.getSheetByName('Sessions');
+    
+    if (!sessionSheet) {
+      throw new Error('System Error: "Sessions" sheet not found. Please run setupDatabase().');
+    }
+
+    const sessionId = Utilities.getUuid();
+    sessionSheet.appendRow([sessionId, email, new Date(Date.now() + 24 * 60 * 60 * 1000)]);
+
+    return { ok: true, data: { sessionId, email } };
+  } catch (e) {
+    return { ok: false, message: e.message };
+  }
+}
+
+// --- LOGGING ---
+
+function logAccess(event) {
+  try {
+    const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
+    const sheet = ss.getSheetByName('AuditLog');
+    if (!sheet) return;
+    sheet.appendRow([
+      new Date(),
+      event.email || '',
+      event.appId || '',
+      event.action || '',
+      event.status || '',
+      event.message || '',
+      event.actor || 'System'
+    ]);
+  } catch (e) {
+    console.error('Logging failed: ' + e.message);
+  }
+}