Prevent certain user roles from showing up in results

Question

I have a special role (role A) that I have to have set with view user profiles permission. I then have another role (role B) as well as the administrator role that I don't want for that roles users to show up in a views exposed filter and/or for the users with role A to be able to view their profiles. Is there:

a. a way to stop users from certain roles showing up in the exposed filters.

b. a generic way (or module) that stops certain roles being able to view other certain roles.

UPDATE:

I solved b with this module which works well:

http://drupal.org/project/view_profiles_perms

So just need to come up with a way of preventing certain roles from showing in a views exposed filter

Answer 1

For A.

Set up another filter in your view for "User: Roles". Choose the Operator "Is none of" and then, choose in the options the role you dont want seen. You can use the roles filter after the exposed one.

Attached is a pic of the user:roles filter section. The options are cutoff to the right (taken from a working site..want to leave the role names private)

You can also expose the role filter and, limit it to the selections you choose in the options pane.

Answer 2

Thanks to googletorp's answer here, I have figured it out. If anyone has a better way of doing it then please add. Basically you do a form_alter on the exposed filter:

function mymodule_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'views_exposed_form') {
    $form['field_my_field_target_id']['#options'] = mymodule_options_filtered_by_roles();
  }
}

function mymodule_options_filtered_by_roles() {
  $role_users = db_select('users_roles', 'ur')
    ->fields('ur', array('uid'))
    ->condition('rid', array(3, 6)) //Here I add the role id's I dont want to show
    ->execute();

  foreach ($role_users as $ru) {
    $role_uids[] = $ru->uid;
  }

  $users = db_select('users', 'u')
    ->fields('u', array('uid','name'))
    ->condition('uid', $role_uids, 'NOT IN') // get all the uids of users not in the above roles
    ->condition('uid', 0, '!=') // get rid of uid 0
    ->execute();

  $user_array = array('All' => t('- Any -')); //Start the array with all
  foreach ($users as $user) {
    $uid = $user->uid;
    $name = $user->name;
    $user_array[$uid] = $name;
  }
  return $user_array;
}