Statistics counter based on user role

Question

I need to track some basic usage statistics for a subset of my authenticated user roles in Drupal 9.

Is there a way to make the core statistics counter only count node views based on user roles? The three counters it provides are all I need, I just need them to only record certain user roles.

Answer 1

The statistics module adds a js library to the node build. You can remove it if you don't want to count the node:

mymodule.module

/**
 * Implements hook_ENTITY_TYPE_view_alter() for node entities.
 */
function mymodule_node_view_alter(array &$build) {
  $roles = \Drupal::currentUser()->getRoles();
  if (!in_array('special_role', $roles)) {
    if (isset($build['#attached']['library'])) {
      $key = array_search('statistics/drupal.statistics', $build['#attached']['library']);
      if ($key !== FALSE) {
        unset($build['#attached']['library'][$key]);
      }
    }
  }
}

This only works if the roles are altering permissions. If not, add a cache context for the user roles:

$build['#cache']['contexts'][] = 'user.roles';