Fungsi inisialisasi sheet otomatis: DB_CHANNELS, DB_USERS, DB_LOGS, default channel, dan auto-header.

/* ========================================================
   FILE 1 — SETUP DATABASE
   Fungsi Otomatisasi Google Spreadsheet Database
   ======================================================== */
function setupDatabase() {
  const ss = SpreadsheetApp.getActiveSpreadsheet();
  
  // 1. SETUP SHEET CHANNELS
  let sheetChannels = ss.getSheetByName('DB_CHANNELS');
  if (!sheetChannels) {
    sheetChannels = ss.insertSheet('DB_CHANNELS');
  }
  if (sheetChannels.getLastRow() === 0) {
    const headers = ['ID', 'CHANNEL_NO', 'NAME', 'RX_FREQ', 'TX_FREQ', 'CTCSS', 'POWER', 'BAND', 'STATUS', 'NOTES', 'CREATED_AT'];
    sheetChannels.appendRow(headers);
    sheetChannels.getRange(1, 1, 1, headers.length).setBackground('#2563EB').setFontColor('#FFFFFF').setFontWeight('bold');
    
    // Default Frequencies
    sheetChannels.appendRow(['CH-01', '01', 'APRS & CALL LOCAL', '144.390', '144.390', '88.5', 'HIGH', 'VHF', 'ACTIVE', 'National APRS Packets', new Date()]);
    sheetChannels.appendRow(['CH-02', '02', 'RAPI LOKAL 01 JAKARTA', '142.500', '142.500', 'None', 'HIGH', 'VHF', 'ACTIVE', 'Calling 10-28', new Date()]);
    sheetChannels.appendRow(['CH-03', '03', 'RPU ORARI REGIONAL', '146.820', '146.220', '88.5', 'HIGH', 'VHF', 'ACTIVE', 'Repeater -0.600 MHz', new Date()]);
    sheetChannels.appendRow(['CH-04', '04', 'SAR & EMERGENCY FREQ', '143.600', '143.600', 'None', 'HIGH', 'VHF', 'ACTIVE', 'Basarnas Disaster Coord', new Date()]);
    sheetChannels.appendRow(['CH-05', '05', 'TACTICAL DISPATCH UHF', '435.000', '430.000', '100.0', 'MID', 'UHF', 'ACTIVE', 'Repeater -5.000 MHz', new Date()]);
  }

  // 2. SETUP SHEET USERS & OPERATORS
  let sheetUsers = ss.getSheetByName('DB_USERS');
  if (!sheetUsers) {
    sheetUsers = ss.insertSheet('DB_USERS');
  }
  if (sheetUsers.getLastRow() === 0) {
    const userHeaders = ['ID', 'USERNAME', 'PASSWORD', 'CALLSIGN', 'NAME', 'ROLE', 'STATUS', 'CREATED_AT'];
    sheetUsers.appendRow(userHeaders);
    sheetUsers.getRange(1, 1, 1, userHeaders.length).setBackground('#059669').setFontColor('#FFFFFF').setFontWeight('bold');
    sheetUsers.appendRow(['USR-01', 'admin', 'admin123', 'JZ10AERO', 'Super Admin Dispatcher', 'ADMIN', 'ACTIVE', new Date()]);
    sheetUsers.appendRow(['USR-02', 'operator1', 'op123', 'YB0AER', 'Radio Operator 1', 'OPERATOR', 'ACTIVE', new Date()]);
  }

  // 3. SETUP SHEET LOGS
  let sheetLogs = ss.getSheetByName('DB_LOGS');
  if (!sheetLogs) {
    sheetLogs = ss.insertSheet('DB_LOGS');
  }
  if (sheetLogs.getLastRow() === 0) {
    const logHeaders = ['LOG_ID', 'TIMESTAMP', 'CHANNEL_ID', 'CALLSIGN', 'DURATION_SEC', 'NOTES'];
    sheetLogs.appendRow(logHeaders);
    sheetLogs.getRange(1, 1, 1, logHeaders.length).setBackground('#7C3AED').setFontColor('#FFFFFF').setFontWeight('bold');
  }

  return { success: true, message: 'Database AeroWave HT berhasil disiapkan!' };
}

Handler web app doGet(), login auth, CRUD endpoint channels, dan export dataset.

/* ========================================================
   FILE 3 — CODE.GS
   Core Web App Controller & CRUD Google Apps Script
   ======================================================== */
function doGet(e) {
  return HtmlService.createHtmlOutputFromFile('Index')
    .setTitle('AeroWave HT Radio Frequency & Dispatcher')
    .addMetaTag('viewport', 'width=device-width, initial-scale=1.0')
    .setXFrameOptionsMode(HtmlService.XFrameOptionsMode.ALLOWALL);
}

function include(filename) {
  return HtmlService.createHtmlOutputFromFile(filename).getContent();
}

function getDatabaseData() {
  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const chSheet = ss.getSheetByName('DB_CHANNELS');
  const userSheet = ss.getSheetByName('DB_USERS');
  
  if (!chSheet) setupDatabase();
  
  const chData = chSheet.getDataRange().getValues();
  const chHeaders = chData[0];
  const channels = chData.slice(1).map(row => {
    let obj = {};
    chHeaders.forEach((h, i) => obj[h] = row[i]);
    return obj;
  });

  const userData = userSheet.getDataRange().getValues();
  const userHeaders = userData[0];
  const users = userData.slice(1).map(row => {
    let obj = {};
    userHeaders.forEach((h, i) => obj[h] = row[i]);
    return obj;
  });

  return { channels: channels, users: users };
}

function saveChannel(payload) {
  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const sheet = ss.getSheetByName('DB_CHANNELS');
  if (payload.id) {
    // Update logic
    const data = sheet.getDataRange().getValues();
    for (let i = 1; i < data.length; i++) {
      if (data[i][0] == payload.id) {
        sheet.getRange(i+1, 2).setValue(payload.channelNo);
        sheet.getRange(i+1, 3).setValue(payload.name);
        sheet.getRange(i+1, 4).setValue(payload.rxFreq);
        sheet.getRange(i+1, 5).setValue(payload.txFreq);
        sheet.getRange(i+1, 6).setValue(payload.ctcss);
        sheet.getRange(i+1, 7).setValue(payload.power);
        sheet.getRange(i+1, 8).setValue(payload.band);
        sheet.getRange(i+1, 9).setValue(payload.status);
        return { success: true, message: 'Kanal berhasil diperbarui!' };
      }
    }
  } else {
    // Insert new logic
    const newId = 'CH-' + Utilities.formatString('%02d', sheet.getLastRow());
    sheet.appendRow([newId, payload.channelNo, payload.name, payload.rxFreq, payload.txFreq, payload.ctcss, payload.power, payload.band, payload.status, payload.notes, new Date()]);
    return { success: true, message: 'Kanal berhasil ditambahkan!', id: newId };
  }
}

function deleteChannel(channelId) {
  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const sheet = ss.getSheetByName('DB_CHANNELS');
  const data = sheet.getDataRange().getValues();
  for (let i = 1; i < data.length; i++) {
    if (data[i][0] == channelId) {
      sheet.deleteRow(i + 1);
      return { success: true, message: 'Kanal berhasil dihapus!' };
    }
  }
  return { success: false, message: 'Kanal tidak ditemukan!' };
}