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<?php

/**
 * Implements hook_menu_alter().
 */
function custom_homepage_role_menu_alter(&$items) {
  global $user;

  $desired_roles = ['IS', 'MMS', 'AA IS'];

  // Check if the user has any of the desired roles.
  foreach ($desired_roles as $role) {
    if (in_array($role, $user->roles)) {
      // Set a different path as the front page for users with the desired roles.
      $items['<front>']['page callback'] = 'custom_homepage_role_custom_frontpage';
      break; // Once a matching role is found, exit the loop.
    }
  }
}

/**
 * Custom callback for the new front page.
 */
function custom_homepage_role_custom_frontpage() {
  // You can return the path of the desired homepage here.
  return 'custom-homepage';
}