/**
* Add field filter to collection
*
* @param string|array $field
* @param string|int|array|null $condition
* @return \Magento\Cms\Model\ResourceModel\Block\Collection
*/
public function addFieldToFilter($field, $condition = null)
{
if ($field == 'visitor_type') {
$field = 'customer_id';
if (is_array($condition) && isset($condition['eq'])) {
$condition = $condition['eq'] == Visitor::VISITOR_TYPE_CUSTOMER ? ['gt' => 0] : ['null' => true];
}
}
return parent::addFieldToFilter($field, $condition);
}
