/**
* Creates a duplicate of the line item tree, except only includes billable items
* and the portion of line items attributed to billable things
* @param EE_Line_Item $line_item
* @param EE_Registration[] $registrations
* @return \EE_Line_Item
*/
public static function billable_line_item_tree(EE_Line_Item $line_item, $registrations)
{
$copy_li = EEH_Line_Item::billable_line_item($line_item, $registrations);
foreach ($line_item->children() as $child_li) {
$copy_li->add_child_line_item(EEH_Line_Item::billable_line_item_tree($child_li, $registrations));
}
//if this is the grand total line item, make sure the totals all add up
//(we could have duplicated this logic AS we copied the line items, but
//it seems DRYer this way)
if ($copy_li->type() === EEM_Line_Item::type_total) {
$copy_li->recalculate_total_including_taxes();
}
return $copy_li;
}
