/**
* Returns PayPal's cart items in Nette\ArrayHash or false if there are no items.
*
* @param $data Data from PayPal response
* @return Nette\ArrayHash or boolean
*/
public function getCartItems()
{
$patternKeys = '';
$iterator = new CachingIterator($this->CART_ITEM_KEYS);
for ($iterator->rewind(); $iterator->valid(); $iterator->next()) {
if ($iterator->isFirst()) {
$patternKeys .= '(';
}
$patternKeys .= $iterator->current();
if ($iterator->hasNext()) {
$patternKeys .= '|';
}
if ($iterator->isLast()) {
$patternKeys .= ')';
}
}
$pattern = '/^' . $patternKeys . '[0-9]+$/';
$itemsData = Utils::array_keys_by_ereg($this->responseData, $pattern);
$items = array();
$itemsCount = count($items);
if (!empty($itemsData)) {
$itemsCount = count($itemsData) / count($this->CART_ITEM_KEYS);
}
// We must control if the result of division is integer.
// Because if not, it means the count of keys in PayPal cart item changed.
assert(is_int($itemsCount));
for ($i = 0; $i < $itemsCount; ++$i) {
$keys = array();
foreach ($this->CART_ITEM_KEYS as $key) {
$keys[] = $key . $i;
}
if (Utils::array_keys_exist($itemsData, $keys)) {
$items[] = array('name' => $itemsData['l_name' . $i], 'quantity' => $itemsData['l_qty' . $i], 'taxAmount' => $itemsData['l_taxamt' . $i], 'amount' => $itemsData['l_amt' . $i], 'description' => $itemsData['l_desc' . $i], 'weightValue' => $itemsData['l_itemweightvalue' . $i], 'lengthValue' => $itemsData['l_itemlengthvalue' . $i], 'widthValue' => $itemsData['l_itemwidthvalue' . $i], 'heightValue' => $itemsData['l_itemheightvalue' . $i]);
}
}
return ArrayHash::from($items);
}
