Исходный код метода:
$this->language->load('payment/google_checkout');
$json = array();
if ($this->cart->hasShipping() && !isset($this->session->data['shipping_method'])) {
$json['error'] = $this->language->get('error_shipping');
}
if (!$json) {
$xml = '<?xml version="1.0" encoding="UTF-8"?>';
$xml .= '<checkout-shopping-cart xmlns="http://checkout.google.com/schema/2">';
$xml .= ' <shopping-cart>';
// $xml .= ' <merchant-private-data>';
// $xml .= ' <order_id>' . $this->session->data['order_id'] . '</order_id>';
// $xml .= ' </merchant-private-data>';
$xml .= ' <items>';
$products = $this->cart->getProducts();
foreach ($products as $product) {
$xml .= ' <item>';
$xml .= ' <merchant-item-id>' . $product['key'] . '</merchant-item-id>';
$option_data = array();
foreach ($product['option'] as $option) {
$option_data[] = $option['name'] . ': ' . $option['value'];
}
if ($option_data) {
$xml .= ' <item-name>' . $product['name'] . ' ' . implode('; ', $option_data) . '</item-name>';
$xml .= ' <item-description>' . $product['name'] . ' ' . implode('; ', $option_data) . '</item-description>';
} else {
$xml .= ' <item-name>' . $product['name'] . '</item-name>';
$xml .= ' <item-description>' . $product['name'] . '</item-description>';
}
$xml .= ' <unit-price currency="' . $this->currency->getCode() . '">' . $this->currency->format($product['price'], $this->currency->getCode(), false, false) . '</unit-price>';
$xml .= ' <quantity>' . $product['quantity'] . '</quantity>';
$xml .= ' </item>';
}
$xml .= ' </items>';
$xml .= ' </shopping-cart>';
if ($this->cart->hasShipping()) {
$xml .= ' <checkout-flow-support>';
$xml .= ' <merchant-checkout-flow-support>';
$xml .= ' <shipping-methods>';
$xml .= ' <flat-rate-shipping name="' . $this->session->data['shipping_method']['title'] . '">';
$xml .= ' <price currency="' . $this->currency->getCode() . '">' . $this->currency->format($this->session->data['shipping_method']['cost'], $this->currency->getCode(), false, false) . '</price>';
$xml .= ' </flat-rate-shipping>';
$xml .= ' </shipping-methods>';
$xml .= ' </merchant-checkout-flow-support>';
$xml .= ' </checkout-flow-support>';
}
if ($this->cart->hasShipping()) {
$xml .= ' <checkout-flow-support>';
$xml .= ' <merchant-checkout-flow-support>';
$xml .= ' <shipping-methods>';
$xml .= ' <flat-rate-shipping name="' . $this->session->data['shipping_method']['title'] . '">';
$xml .= ' <price currency="' . $this->currency->getCode() . '">' . $this->currency->format($this->session->data['shipping_method']['cost'], $this->currency->getCode(), false, false) . '</price>';
$xml .= ' </flat-rate-shipping>';
$xml .= ' </shipping-methods>';
$xml .= ' </merchant-checkout-flow-support>';
$xml .= ' </checkout-flow-support>';
}
$xml .= '</checkout-shopping-cart>';
$key = $this->config->get('google_checkout_merchant_key');
$blocksize = 64;
$hash = 'sha1';
if (strlen($key) > $blocksize) {
$key = pack('H*', $hash($key));
}
$key = str_pad($key, $blocksize, chr(0x00));
$ipad = str_repeat(chr(0x36), $blocksize);
$opad = str_repeat(chr(0x5c), $blocksize);
$hmac = pack('H*', $hash(($key ^ $opad) . pack('H*', $hash(($key ^ $ipad) . $xml))));
$json['cart'] = base64_encode($xml);
$json['signature'] = base64_encode($hmac);
}
$this->response->setOutput(json_encode($json));
