Populate Fields from Current User

function onLoad() {
  // Only run when creating a new record
  if (g_form.isNewRecord()) {

    // Configuration: Define which fields to populate
    var populateFields = true;

    // Get current user information
    var userId = g_user.userID;
    var userName = g_user.userName;
    var userFullName = g_user.firstName + ' ' + g_user.lastName;

    // Example 1: Populate caller with current user
    if (g_form.getValue('caller_id') === '') {
      g_form.setValue('caller_id', userId);
    }

    // Example 2: Populate opened_by with current user (usually automatic)
    // This is typically set automatically by ServiceNow
    // Uncomment only if you have a custom field
    /*
    if (g_form.getValue('opened_by') === '') {
      g_form.setValue('opened_by', userId);
    }
    */

    // Example 3: Get additional user details via GlideAjax
    // This fetches more detailed user information from the server
    var ga = new GlideAjax('UserInfoUtils');
    ga.addParam('sysparm_name', 'getUserDetails');
    ga.addParam('sysparm_user_id', userId);

    ga.getXMLAnswer(function(response) {
      if (response) {
        try {
          var userDetails = JSON.parse(response);

          // Populate fields with user details
          if (userDetails.email && g_form.getValue('u_contact_email') === '') {
            g_form.setValue('u_contact_email', userDetails.email);
          }

          if (userDetails.phone && g_form.getValue('u_contact_phone') === '') {
            g_form.setValue('u_contact_phone', userDetails.phone);
          }

          if (userDetails.location && g_form.getValue('location') === '') {
            g_form.setValue('location', userDetails.location);
          }

          if (userDetails.department && g_form.getValue('u_department') === '') {
            g_form.setValue('u_department', userDetails.department);
          }

          // Optional: Show info message
          if (userDetails.vip) {
            g_form.addInfoMessage('You are marked as a VIP user. Your request will be prioritized.');
          }

          // Display open tickets count
          if (userDetails.openTickets > 0) {
            g_form.addInfoMessage('You currently have ' + userDetails.openTickets + ' open tickets.');
          }
        } catch (e) {
          console.error('Error parsing user details: ' + e);
        }
      }
    });

    // Example 4: Pre-populate custom message
    /*
    var welcomeMsg = 'Request created by ' + userFullName + ' (' + userName + ')';
    g_form.setValue('u_created_by_message', welcomeMsg);
    */
  }
}