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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

require_once("Summary_report.php");

class Summary_items extends Summary_report
{
    function __construct()
    {
        parent::__construct();
    }

    protected function _get_data_columns()
    {
        return array(
            array('item_name' => $this->lang->line('reports_item')),
            array('quantity' => $this->lang->line('reports_quantity')),
            array('subtotal' => $this->lang->line('reports_subtotal'), 'sorter' => 'number_sorter'),
            array('tax' => $this->lang->line('reports_tax'), 'sorter' => 'number_sorter'),
            array('total' => $this->lang->line('reports_total'), 'sorter' => 'number_sorter'),
            array('cost' => $this->lang->line('reports_cost'), 'sorter' => 'number_sorter'),
            array('profit' => $this->lang->line('reports_profit'), 'sorter' => 'number_sorter'));
    }

    protected function _select(array $inputs)
    {
        parent::_select($inputs);

        $this->db->select('
                MAX(items.name) AS name,
                SUM(sales_items.quantity_purchased) AS quantity_purchased
        ');
    }

    protected function _from()
    {
        parent::_from();

        $this->db->join('items AS items', 'sales_items.item_id = items.item_id', 'inner');
    }

    protected function _group_order()
    {
        $this->db->group_by('items.item_id');
        $this->db->order_by('name');
    }
}
?>