Codeignighter Cart class base fee - php

Question

I have a unique shop where some products incur a base fee, lets say
A photographer charges $20 for the first hour then $1 there-after.
I am passing a variable into my codeignighter cart ; so for 5 hours I would pass the variable into cart->insert();
$item['id'] = 1;
$item['qty'] = 5;
$item['base'] = 20.00;
I made some changes to the cart class so this would work and has been fine so far, what I now need and cant seem to figure this out is when there are options it considers it a different product and this fee is charged once per rowid.
I would like my class to only allow 1 charge for the item regardless of the various options.
Below are the three functions I created inside my Cart class
and I call set_base($item) in the _save_cart() function.
private function set_base($item)
{
if( $this->base_exist($item) )
{
return FALSE;
}
// Only allow the base cost for 1 row id, it doesnt matter which one, just one
$this->_base_indexes['rowid'][$item['id']] = $item['rowid'];
$this->_cart_contents['cart_total'] += $item['base'];
return TRUE;
}
private function base_exist($item)
{
if ( array_key_exists($item['id'] , $this->_base_indexes['applied']) )
{
if ( ( $item['rowid'] == $this->_base_indexes['applied'][$item['id']] ) )
{
return TRUE;
}
}
return FALSE;
}
private function base_reset()
{
$this->_base_indexes = array();
$this->_base_indexes['applied'] = array();
return $this->_base_indexes;
}
Inside _save_cart();
I call
$this->base_reset();
Inside the cart_contents() loop I have added;
if(isset($val['base']))
{
$this->set_base($val);
}
$this->_cart_contents['cart_total'] += ($val['price'] * $val['qty']);
Hope this was clear :/

Answer 1

OK i changed it a little bit,
the foreach loop in the save_cart function now looks like; and I can remove the three functions I had before.
foreach ($this->_cart_contents as $key => $val)
{
// We make sure the array contains the proper indexes
if ( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty']))
{
continue;
}
if(isset($val['base']))
{
//If it doesnt exist, add the fee
if (!(isset($this->_base_indexes[$val['id']]) == $val['rowid']) )
{
$this->_base_indexes[$val['id']] = $val['rowid'];
$this->_cart_contents['cart_total'] += $val['base'];
$sub = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']) + $val['base'];
}
else
{
//$this->_cart_contents[$key]['base'] = 0;
$sub = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']);
}
}
$this->_cart_contents['cart_total'] += ($val['price'] * $val['qty']);
$this->_cart_contents['total_items'] += $val['qty'];
$this->_cart_contents[$key]['subtotal'] = $sub;
}