1:  2:  3:  4:  5:  6:  7:  8:  9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28: 29: 30: 31: 32: 33: 34: 35: 36: 37: 38: 39: 40: 41: 42: 43: 44: 45: 46: 47: 48: 49: 50: 51: 52: 53: 54: 55: 56: 57: 58: 59: 60: 61: 62: 63: 64: 65: 66: 67: 68: 69: 70: 71: 72: 73: 74: 75: 76: 77: 78: 79: 80: 81: 82: 83: 84: 85: 

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

require_once("Report.php");

class Inventory_summary extends Report
{
    function __construct()
    {
        parent::__construct();
    }

    public function getDataColumns()
    {
        return array(array('item_name' => $this->lang->line('reports_item_name')),
                    array('item_number' => $this->lang->line('reports_item_number')),
                    array('quantity' => $this->lang->line('reports_quantity')),
                    array('reorder_level' => $this->lang->line('reports_reorder_level')),
                    array('location_name' => $this->lang->line('reports_stock_location')),
                    array('cost_price' => $this->lang->line('reports_cost_price'), 'sorter' => 'number_sorter'),
                    array('unit_price' => $this->lang->line('reports_unit_price'), 'sorter' => 'number_sorter'),
                    array('subtotal' => $this->lang->line('reports_sub_total_value'), 'sorter' => 'number_sorter'));
    }

    public function getData(array $inputs)
    {   
        $this->db->select('items.name, items.item_number, item_quantities.quantity, items.reorder_level, stock_locations.location_name, items.cost_price, items.unit_price, (items.cost_price * item_quantities.quantity) AS sub_total_value');
        $this->db->from('items AS items');
        $this->db->join('item_quantities AS item_quantities', 'items.item_id = item_quantities.item_id');
        $this->db->join('stock_locations AS stock_locations', 'item_quantities.location_id = stock_locations.location_id');
        $this->db->where('items.deleted', 0);
        $this->db->where('items.stock_type', 0);
        $this->db->where('stock_locations.deleted', 0);

        // should be corresponding to values Inventory_summary::getItemCountDropdownArray() returns...
        if($inputs['item_count'] == 'zero_and_less')
        {
            $this->db->where('item_quantities.quantity <= 0');
        }
        elseif($inputs['item_count'] == 'more_than_zero')
        {
            $this->db->where('item_quantities.quantity > 0');
        }

        if($inputs['location_id'] != 'all')
        {
            $this->db->where('stock_locations.location_id', $inputs['location_id']);
        }

        $this->db->order_by('items.name');

        return $this->db->get()->result_array();
    }

    /**
     * calculates the total value of the given inventory summary by summing all sub_total_values (see Inventory_summary::getData())
     * 
     * @param array $inputs expects the reports-data-array which Inventory_summary::getData() returns
     * @return array
     */
    public function getSummaryData(array $inputs)
    {
        $return = array('total_inventory_value' => 0);

        foreach($inputs as $input)
        {
            $return['total_inventory_value'] += $input['sub_total_value'];
        }

        return $return;
    }

    /**
     * returns the array for the dropdown-element item-count in the form for the inventory summary-report
     * 
     * @return array
     */
    public function getItemCountDropdownArray()
    {
        return array('all' => $this->lang->line('reports_all'),
                    'zero_and_less' => $this->lang->line('reports_zero_and_less'),
                    'more_than_zero' => $this->lang->line('reports_more_than_zero'));
    }
}
?>