/**
* @param object|array $input A PHP object or array
*
* @return string JSON representation of the PHP object or array
*/
public static function jsonEncode($input)
{
$json = json_encode($input);
if (function_exists('json_last_error') && ($errno = json_last_error())) {
JWT::handleJsonError($errno);
} else {
if ($json === 'null' && $input !== null) {
throw new DomainException('Null result with non-null input');
}
}
return $json;
}
/**
* This function generates the required JWT token to create a HTML embed code required for creating a purchase.
*
* Example:
*
* ```
* $purchaseOptions = new PurchasedAt\PurchaseOptions($customerEmail);
*
* echo PurchasedAt\PurchaseScript::token($apiKey, $purchaseOptions);
* ```
*
* @param string $apiKey the api key
* @param PurchaseOptions $purchaseOptions the purchase options
* @param JWTOptions $jwtOptions the jwt options
*
* @return string JWT token
*
* @throws \InvalidArgumentException if an invalid type was provided to any of the parameters.
*/
public static function token($apiKey, $purchaseOptions, $jwtOptions = null)
{
if (!$purchaseOptions instanceof PurchaseOptions) {
if (is_object($purchaseOptions)) {
$type = get_class($purchaseOptions);
} else {
$type = gettype($purchaseOptions);
}
throw new \InvalidArgumentException('Invalid parameter type ' . $type . ' for purchaseOptions in PurchaseScript::render. ' . 'Please use an instance of the PurchaseOptions class instead.');
}
if (!is_null($jwtOptions) && !$jwtOptions instanceof JWTOptions) {
if (is_object($jwtOptions)) {
$type = get_class($jwtOptions);
} else {
$type = gettype($jwtOptions);
}
throw new \InvalidArgumentException('Invalid parameter type ' . $type . ' for jwtOptions in PurchaseScript::render. Please use an instance of the JWTOptions class instead.');
}
$parts = explode(':', $apiKey);
if (count($parts) != 2 || strlen($parts[0]) < 1 || strlen($parts[1]) < 1) {
throw new \InvalidArgumentException('Invalid API key (must contain exactly two parts separated by a colon)');
}
$key = $parts[1];
$keyId = $parts[0];
$utc = new \DateTimeZone('UTC');
if (!isset($jwtOptions)) {
$jwtOptions = new JWTOptions();
}
if (!$jwtOptions->getJwtId()) {
$jwtOptions->setJwtId(base64_encode(mt_rand()));
}
if (!$jwtOptions->getNotBefore()) {
$jwtOptions->setNotBefore((new \DateTime('now', $utc))->sub(new \DateInterval(Constants::DEFAULT_JWT_NOT_BEFORE_INTERVAL)));
}
if (!$jwtOptions->getExpiration()) {
$jwtOptions->setExpiration(new \DateTime(Constants::DEFAULT_JWT_EXPIRATION, $utc));
}
$payload = $purchaseOptions->getPayload();
if (!$payload->getCustomer()->getEmail()) {
throw new \InvalidArgumentException('The purchaseOptions parameter must contain the customers e-mail address. (Empty string found.)');
}
if (!$payload->getSdk()) {
$payload->setSdk('PHP/' . Constants::SDK_VERSION);
}
return JWT::encode(array('jti' => $jwtOptions->getJwtId(), 'aud' => 'pat-api', 'nbf' => $jwtOptions->getNotBefore()->getTimestamp(), 'exp' => $jwtOptions->getExpiration()->getTimestamp(), 'pat:payload' => $payload->build()), $key, $keyId);
}