Insert if not exists with Codeigniter - php

Question

I am encountering the following problem I am trying to insert data into the table if
phone, sushi_service_id both has a row with active = 1
for example:
ID | Phone | sushi_service_id | active
---------------------------------------
1 | 455 | 1 | 1 (LEGAL)
3 | 455 | 1 | 0 (LEGAL)
4 | 455 | 1 | 0 (LEGAL)
5 | 455 | 1 | 1 (NOT LEGAL! HAS THE SAME PHONE+SUSHI_SERVICE_ID+ACTIVE=1)
This is my codeigniter code:
how can I improve it in order to work like I said above?
public function add($service, $phone, $sushi_subscription_id, $answer_id, $affiliate_id, $ip, $query, $invite_type, $invite_msg_id)
{
$this->db->set('service_id', $service->id);
$this->db->set('sushi_service_id', $service->sushi_service_id);
$this->db->set('phone', $phone);
if ($sushi_subscription_id) {
$this->db->set('sushi_subscription_id', $sushi_subscription_id);
}
$this->db->set('answer_id', $answer_id);
if ($affiliate_id) {
$this->db->set('affiliate_id', $affiliate_id);
}
$this->db->set('added', 'NOW()', FALSE);
$this->db->set('active', 1);
$this->db->set('ip', $ip);
$this->db->set('query', $query);
if ($invite_type) {
$this->db->set('invite_type', $invite_type);
}
if ($invite_msg_id) {
$this->db->set('invite_msg_id', $invite_msg_id);
}
return ($this->db->insert($this->_table_name)) ? $this->db->insert_id() : FALSE;
}

Answer 1

I would just do a select * from XX where active = 1 and then based on the result of num_rows the insert query.

Answer 2

Easiest way to do this would be in a single INSERT with ON DUPLICATE KEY UPDATE query.
Example structure:
INSERT INTO table ... VALUES .... ON DUPLICATE KEY UPDATE