Populate Fields on Insert

(function executeRule(current, previous /*null when async*/) {

  // Only run on new records
  if (!current.isNewRecord()) {
    return;
  }

  // Example 1: Set default priority based on caller's VIP status
  if (current.caller_id.vip.toString() === 'true' && current.isNil('priority')) {
    current.priority = '2';  // High priority for VIPs
    current.work_notes = 'Priority set to High due to VIP caller';
  }

  // Example 2: Auto-populate due date based on priority
  if (!current.isNil('priority') && current.isNil('due_date')) {
    var priorityToDueDays = {
      '1': 4,    // Critical: 4 hours
      '2': 8,    // High: 8 hours
      '3': 24,   // Moderate: 24 hours
      '4': 72,   // Low: 72 hours
      '5': 120   // Planning: 120 hours
    };

    var hoursToAdd = priorityToDueDays[current.priority.toString()] || 24;
    var gdt = new GlideDateTime();
    gdt.addHours(hoursToAdd);
    current.due_date = gdt;

    gs.info('Set due date to ' + gdt.getDisplayValue() + ' for priority ' + current.priority);
  }

  // Example 3: Set category based on configuration item
  if (!current.cmdb_ci.nil() && current.isNil('category')) {
    var ciClass = current.cmdb_ci.sys_class_name.toString();

    var classToCategory = {
      'cmdb_ci_computer': 'hardware',
      'cmdb_ci_server': 'hardware',
      'cmdb_ci_app_software': 'software',
      'cmdb_ci_database': 'database',
      'cmdb_ci_network_adapter': 'network'
    };

    if (classToCategory[ciClass]) {
      current.category = classToCategory[ciClass];
      current.work_notes = 'Category auto-populated based on CI type: ' + ciClass;
    }
  }

  // Example 4: Copy location from caller if not set
  if (!current.caller_id.nil() && current.isNil('location')) {
    current.location = current.caller_id.location;
  }

  // Example 5: Generate unique reference number
  if (current.isNil('u_reference_number')) {
    var prefix = 'REF';
    var timestamp = new GlideDateTime().getNumericValue();
    current.u_reference_number = prefix + '-' + timestamp.toString().substring(8);
  }

})(current, previous);