/**
 * Implements hook_install().
 */
function achievements_optout_install() {
  field_create_field(array(
    'field_name'  => 'achievements_optout',
    'type'        => 'list_boolean',
    'settings'    => array(
      'allowed_values' => array(0 => '', 1 => ''),
    ),
  ));

  field_create_instance(array(
    'bundle'      => 'user',
    'entity_type' => 'user',
    'field_name'  => 'achievements_optout',
    'label'       => t('I DO NOT wish to participate in or unlock achievements'),
    'description' => t('DANGER! Checking this box will remove your unlocked achievements and delete your stored statistics.'),
    'widget' => array(
      'type'      => 'options_onoff',
      'weight'    => 1,
      'settings'  => array(
        'display_label' => 1,
      ),
    ),
  ));
}

/**
 * Implements hook_uninstall().
 */
function achievements_optout_uninstall() {
  field_delete_field('achievements_optout');
}