<?
session_start();
session_register("items_id");
session_register("items_quantity");
session_register("items_price");

if(empty($dblink)){
                  $dblink = mysql_connect($sql_host,$sql_user,$sql_pass) or err_ret("2007");
                  mysql_select_db($db_name) or err_ret("2008");
}
/*--------------------------------------------------
Function name:

         basket_item_add($id,$quantity,$expire)

Description:

        function add item to the basket.
--------------------------------------------------*/
function basket_item_add($id,$quantity,$price,$expiry)
{
global $items_id,$items_quantity,$items_price;
global $db_products_tbl,$db_sessions_tbl;
//echo $price;
        check_int($id,$quantity);

        //check if product exist in the product table
        $strSQL = "select * from $db_products_tbl where id=$id";
       // echo $strSQL;
        $result = mysql_query($strSQL) or err_ret("2009");
        $num_rows = mysql_num_rows($result);

        if(!$num_rows)
                #product isn't exist
                err_ret("2004");

        //Check if item exist in basket
        $place = basket_item_place($id);
        if($place != -1)
        {
                //echo "The item exist in your basket";
                return 0;
        }

        if(session_is_registered ("items_id"))
                $arr_length = count($items_id);
        else
                $arr_length = 0;

        $items_id[$arr_length] = $id;
        $items_quantity[$arr_length] = $quantity;
		$items_price[$arr_length] = $price;
}

/*--------------------------------------------------
For internal use.

Function name:

         basket_item_place($id)

Description:

        function check if cpecify item exist in basket.
        Return value :
                -1  - not exist;
                num - item place in array.
--------------------------------------------------*/


function basket_item_place($id)
{
        global $items_id;
        for($i = 0; $i < count($items_id); $i++)
                if($items_id[$i] == $id)
                {
                        return($i);
                        break;
                }
        return -1;
}


/*--------------------------------------------------
Function name:

         basket_item_del($id)

Description:

        function delete cpecify item from the basket.
--------------------------------------------------*/

function basket_item_del($id)
{
global $items_id,$items_quantity,$items_price,$db_sessions_tbl;

        check_int($id);
        //find place of iditem in array
        $place = -1;
        for ($i = 0; $i < count($items_id); $i++)
        {
                if ($items_id[$i] == $id)
                {
                        $place =  $i;
                        for ($j = 0; $j < (count($items_id) - $place); $j++)
                        {
                                $tmp[$j] =  $items_id[$i+$j+1];
                        }
                        break;

                }
        }
        if ($place == -1)
                return 0;

        array_splice ($items_id, $place, count($tmp), $tmp);
        array_pop($items_id);

        for ($j = 0; $j < (count($items_quantity) - $place); $j++)
        {
                $tmp[$j] =  $items_quantity[$i+$j+1];
        }
				
    array_splice ($items_quantity, $place, count($tmp), $tmp);
    array_pop($items_quantity);
	
	  for ($j = 0; $j < (count($items_price) - $place); $j++)
        {
                $tmp[$j] =  $items_price[$i+$j+1];
        }
		array_splice ($items_price, $place, count($tmp), $tmp);
    	array_pop($items_price);
}

/*--------------------------------------------------
Function name:

         basket_item_list()

Description:


--------------------------------------------------*/


function basket_item_list()
{
global $items_id,$items_quantity;
        if(empty($items_id))
                echo "Your cart is currently empty.";
        else
        //TODO: Get the data from db (name,etc..) and return array.
                for ($i = 0; $i < count($items_id); $i++ )
                {
                  //      $items_id[$i];
                }
}
/*--------------------------------------------------
Function name:

        basket_item_delall()

Description:

        function delete all items from the basket.
--------------------------------------------------*/


function basket_item_delall()
{
        global $items_id,$items_quantity,$db_sessions_tbl,$items_price;
        if (isset($items_id))
        {
                session_unset("items_id");
                unset($items_id);
        }
        if (isset($items_quantity))
        {
                session_unset("items_quantity");
                unset($items_quantity);
        }
		if (isset($items_price))
        {
                session_unset("items_price");
                unset($items_price);
        }
        session_destroy();
        //echo "item->".$items_id[0];
}

/*--------------------------------------------------
Function name:

        basket_item_update($id,$quantity)

Description:

        function update the item in the basket.
--------------------------------------------------*/


function basket_item_update($id,$quantity,$price)
{
        global $items_id,$items_quantity,$db_sessions_tbl,$items_price;
        check_int($id,$quantity);

        $place = basket_item_place($id);
        if($place == -1)
                die("Item isn't exist in your basket!");

        for($i = 0; $i < count($items_id); $i++)
                if($items_id[$i] == $id)
                {
                        $items_quantity[$i] = $quantity;
						$items_price[$i] = $price;
                }

}


/*function basket_sum(){
                global $items_id,$items_quantity,$db_products_tbl,$price,$pnp,$percent_cost,$p_price_sales,$p_sales;

                 if(count($items_id))
                 {
                 $sum = 0;
                 for($i = 0; $i < count($items_id); $i++)
                        {
                                settype($items_id[$i],"integer");
                                prod_get($items_id[$i]);
                                if($p_sales)
                                    $prod_price = $p_price_sales;
                                else
                                    $prod_price = $price;
								if(!$percent_cost)	
									$percent_cost = 1;
                                $numPostCost = intval($items_quantity[$i]/$percent_cost);
                                if($items_quantity[$i] % $percent_cost)
                                        $numPostCost ++;
                                if($numPostCost == 0)
                                        $numPostCost = 1;
                                $sum += ($prod_price*$items_quantity[$i] + $numPostCost*$pnp);
                        }
                 }
                 return $sum;
}
*/


function basket_count(){
         return count($items_id);
}

?>