/**
* Set or update the category of the mailing.
*
* A mailing category is simply a mailing group of type 'Mailing Category', in addition to being of type 'Mailing
* List'.
*
* A mailing can only ever be associated with one category (i.e. mailing group of type 'Mailing Category')
*
* @param $params
*
* @return $this
*/
protected static function setMailingCategory($params)
{
if (!empty($params['category_id'])) {
$group = new CRM_Mailing_DAO_MailingGroup();
$group->reset();
$group->selectAdd('*');
$group->mailing_id = $params['crm_mailing_id'];
$group->group_type = static::MAILING_GROUP_TYPE_BASE;
$group->entity_table = 'civicrm_group';
if ($group->find(TRUE)) {
$group->entity_id = $params['category_id'];
return $group->save();
}
$group->entity_id = $params['category_id'];
return $group->save();
}
}