function cartAddToCart($productID, $variants)
{
$is = GetProductInStockCount($productID);
$sql = '
SELECT
min_order_amount
FROM ' . PRODUCTS_TABLE . '
WHERE productID=' . (int) $productID;
$q = db_query($sql);
$min_order_amount = db_fetch_row($q);
$min_order_amount = $min_order_amount[0];
$count_to_order = 1;
if (!isset($_SESSION['log'])) {
//save shopping cart in the session variables
//$_SESSION['gids'] contains product IDs
//$_SESSION['counts'] contains product quantities
// ($_SESSION['counts'][$i] corresponds to $_SESSION['gids'][$i])
//$_SESSION['configurations'] contains variants
//$_SESSION[gids][$i] == 0 means $i-element is 'empty'
if (!isset($_SESSION['gids'])) {
$_SESSION['gids'] = array();
$_SESSION['counts'] = array();
$_SESSION['configurations'] = array();
}
//check for current item in the current shopping cart content
$item_index = SearchConfigurationInSessionVariable($variants, $productID);
if ($item_index == -1) {
$count_to_order = $min_order_amount;
}
if ($item_index != -1) {
//increase current product's quantity
if (CONF_CHECKSTOCK == 0 || $_SESSION['counts'][$item_index] + $count_to_order <= $is) {
$_SESSION['counts'][$item_index] += $count_to_order;
} else {
return false;
}
} else {
if (CONF_CHECKSTOCK == 0 || $is >= $count_to_order) {
//no item - add it to $gids array
$_SESSION['gids'][] = $productID;
$_SESSION['counts'][] = $count_to_order;
$_SESSION['configurations'][] = $variants;
} else {
return false;
}
}
} else {
//authorized customer - get cart from database
$itemID = SearchConfigurationInDataBase($variants, $productID);
if ($itemID != -1) {
// if this configuration exists in database
$sql = '
SELECT
Quantity
FROM ' . SHOPPING_CARTS_TABLE . '
WHERE customerID=' . (int) regGetIdByLogin($_SESSION['log']) . ' AND itemID=' . (int) $itemID;
$q = db_query($sql);
$row = db_fetch_row($q);
$quantity = $row['Quantity'];
if (CONF_CHECKSTOCK == 0 || $quantity + $count_to_order <= $is) {
$sql = '
UPDATE ' . SHOPPING_CARTS_TABLE . '
SET Quantity=' . (int) ($row[0] + $count_to_order) . '
WHERE customerID=' . (int) regGetIdByLogin($_SESSION['log']) . ' AND itemID=' . (int) $itemID;
db_query($sql);
} else {
return false;
}
} else {
//insert new item
$count_to_order = $min_order_amount;
if (CONF_CHECKSTOCK == 0 || $is >= $count_to_order) {
$itemID = InsertNewItem($variants, $productID);
InsertItemIntoCart($itemID);
$sql = '
UPDATE ' . SHOPPING_CARTS_TABLE . '
SET Quantity=' . (int) $count_to_order . '
WHERE customerID=' . (int) regGetIdByLogin($_SESSION['log']) . ' AND itemID=' . (int) $itemID;
db_query($sql);
} else {
return false;
}
}
}
return true;
}
$is = GetProductInStockCount($productID);
if ($val > 0) {
//$val is a new items count in the shopping cart
if (CONF_CHECKSTOCK == 1) {
$val = min($val, $is);
}
//check stock level
$q = db_query("UPDATE " . SHOPPING_CARTS_TABLE . " SET Quantity=" . floor($val) . " WHERE customerID=" . regGetIdByLogin($_SESSION["log"]) . " AND itemID=" . (int) str_replace("count_", "", $key));
} else {
//$val<=0 => delete item from cart
$q = db_query("DELETE FROM " . SHOPPING_CARTS_TABLE . " WHERE customerID=" . regGetIdByLogin($_SESSION["log"]) . " AND itemID=" . (int) str_replace("count_", "", $key));
}
} else {
//session vars
$res = DeCodeItemInClient(str_replace("count_", "", $key));
$is = GetProductInStockCount($res["productID"]);
if ($val > 0) {
$i = SearchConfigurationInSessionVariable($res["variants"], $res["productID"]);
//check stock level
if (CONF_CHECKSTOCK == 1) {
$val = min($val, $is);
}
$_SESSION["counts"][$i] = floor($val);
} else {
//remove
$i = SearchConfigurationInSessionVariable($res["variants"], $res["productID"]);
$_SESSION["gids"][$i] = 0;
}
}
}
}