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<?php
namespace Braintree;
use InvalidArgumentException;
/**
* Braintree ClientTokenGateway module
*
* Manages Braintree ClientTokens
* For more detailed information on ClientTokens, see {@link https://developer.paypal.com/braintree/docsreference/response/client-token/php our developer docs}. <br />
*/
class ClientTokenGateway
{
private $_gateway;
private $_config;
private $_http;
// phpcs:ignore PEAR.Commenting.FunctionComment.Missing
public function __construct($gateway)
{
$this->_gateway = $gateway;
$this->_config = $gateway->config;
$this->_config->assertHasAccessTokenOrKeys();
$this->_http = new Http($gateway->config);
}
/**
* Generate a client token for client-side authorization
*
* @param Optional $params containing request parameters
*
* @return string client token
*/
public function generate($params = [])
{
if (!array_key_exists("version", $params)) {
$params["version"] = ClientToken::DEFAULT_VERSION;
}
$this->conditionallyVerifyKeys($params);
$generateParams = ["client_token" => $params];
return $this->_doGenerate('/client_token', $generateParams);
}
// phpcs:ignore PEAR.Commenting.FunctionComment.Missing
public function _doGenerate($subPath, $params)
{
$fullPath = $this->_config->merchantPath() . $subPath;
$response = $this->_http->post($fullPath, $params);
return $this->_verifyGatewayResponse($response);
}
/*
* Checks if customer id is provided prior to verifying keys provided in params
*
* @param array $params to be verified
*
* @return array
*/
public function conditionallyVerifyKeys($params)
{
if (array_key_exists("customerId", $params)) {
Util::verifyKeys($this->generateWithCustomerIdSignature(), $params);
} else {
Util::verifyKeys($this->generateWithoutCustomerIdSignature(), $params);
}
}
/*
* returns an array of keys including customer id
*
* @return array
*
*/
public function generateWithCustomerIdSignature()
{
return [
"version", "customerId", "proxyMerchantId",
["options" => ["makeDefault", "verifyCard", "failOnDuplicatePaymentMethod"]],
"merchantAccountId"];
}
/*
* returns an array of keys without customer id
*
* @return array
*/
public function generateWithoutCustomerIdSignature()
{
return ["version", "proxyMerchantId", "merchantAccountId"];
}
/**
* generic method for validating incoming gateway responses
*
* If the request is successful, returns a client token string.
* Otherwise, throws an InvalidArgumentException with the error
* response from the Gateway or an HTTP status code exception.
*
* @param array $response gateway response values
*
* @throws InvalidArgumentException | HTTP status code exception
*
* @return string client token
*/
private function _verifyGatewayResponse($response)
{
if (isset($response['clientToken'])) {
return $response['clientToken']['value'];
} elseif (isset($response['apiErrorResponse'])) {
throw new InvalidArgumentException(
$response['apiErrorResponse']['message']
);
} else {
throw new Exception\Unexpected(
"Expected clientToken or apiErrorResponse"
);
}
}
}