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<?php declare(strict_types=1);
namespace Automattic\WooCommerce\Vendor\GraphQL\Server;
use Automattic\WooCommerce\Vendor\GraphQL\Error\InvariantViolation;
use Automattic\WooCommerce\Vendor\GraphQL\Executor\ExecutionResult;
use Automattic\WooCommerce\Vendor\GraphQL\Executor\Promise\Promise;
use Automattic\WooCommerce\Vendor\GraphQL\Utils\Utils;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamInterface;
/**
* Automattic\WooCommerce\Vendor\GraphQL server compatible with both: [express-graphql](https://github.com/graphql/express-graphql)
* and [Apollo Server](https://github.com/apollographql/graphql-server).
* Usage Example:.
*
* $server = new StandardServer([
* 'schema' => $mySchema
* ]);
* $server->handleRequest();
*
* Or using [ServerConfig](class-reference.md#graphqlserverserverconfig) instance:
*
* $config = Automattic\WooCommerce\Vendor\GraphQL\Server\ServerConfig::create()
* ->setSchema($mySchema)
* ->setContext($myContext);
*
* $server = new Automattic\WooCommerce\Vendor\GraphQL\Server\StandardServer($config);
* $server->handleRequest();
*
* See [dedicated section in docs](executing-queries.md#using-server) for details.
*
* @see \Automattic\WooCommerce\Vendor\GraphQL\Tests\Server\StandardServerTest
*/
class StandardServer
{
protected ServerConfig $config;
protected Helper $helper;
/**
* @param ServerConfig|array<string, mixed> $config
*
* @api
*
* @throws InvariantViolation
*/
public function __construct($config)
{
if (is_array($config)) {
$config = ServerConfig::create($config);
}
// @phpstan-ignore-next-line necessary until we can use proper union types
if (! $config instanceof ServerConfig) {
$safeConfig = Utils::printSafe($config);
throw new InvariantViolation("Expecting valid server config, but got {$safeConfig}");
}
$this->config = $config;
$this->helper = new Helper();
}
/**
* Parses HTTP request, executes and emits response (using standard PHP `header` function and `echo`).
*
* When $parsedBody is not set, it uses PHP globals to parse a request.
* It is possible to implement request parsing elsewhere (e.g. using framework Request instance)
* and then pass it to the server.
*
* See `executeRequest()` if you prefer to emit the response yourself
* (e.g. using the Response object of some framework).
*
* @param OperationParams|array<OperationParams> $parsedBody
*
* @api
*
* @throws \Exception
* @throws InvariantViolation
* @throws RequestError
*/
public function handleRequest($parsedBody = null): void
{
$result = $this->executeRequest($parsedBody);
$this->helper->sendResponse($result);
}
/**
* Executes a Automattic\WooCommerce\Vendor\GraphQL operation and returns an execution result
* (or promise when promise adapter is different from SyncPromiseAdapter).
*
* When $parsedBody is not set, it uses PHP globals to parse a request.
* It is possible to implement request parsing elsewhere (e.g. using framework Request instance)
* and then pass it to the server.
*
* PSR-7 compatible method executePsrRequest() does exactly this.
*
* @param OperationParams|array<OperationParams> $parsedBody
*
* @throws \Exception
* @throws InvariantViolation
* @throws RequestError
*
* @return ExecutionResult|array<int, ExecutionResult>|Promise
*
* @api
*/
public function executeRequest($parsedBody = null)
{
if ($parsedBody === null) {
$parsedBody = $this->helper->parseHttpRequest();
}
if (is_array($parsedBody)) {
return $this->helper->executeBatch($this->config, $parsedBody);
}
return $this->helper->executeOperation($this->config, $parsedBody);
}
/**
* Executes PSR-7 request and fulfills PSR-7 response.
*
* See `executePsrRequest()` if you prefer to create response yourself
* (e.g. using specific JsonResponse instance of some framework).
*
* @throws \Exception
* @throws \InvalidArgumentException
* @throws \JsonException
* @throws \RuntimeException
* @throws InvariantViolation
* @throws RequestError
*
* @return ResponseInterface|Promise
*
* @api
*/
public function processPsrRequest(
RequestInterface $request,
ResponseInterface $response,
StreamInterface $writableBodyStream
) {
$result = $this->executePsrRequest($request);
return $this->helper->toPsrResponse($result, $response, $writableBodyStream);
}
/**
* Executes Automattic\WooCommerce\Vendor\GraphQL operation and returns execution result
* (or promise when promise adapter is different from SyncPromiseAdapter).
*
* @throws \Exception
* @throws \JsonException
* @throws InvariantViolation
* @throws RequestError
*
* @return ExecutionResult|array<int, ExecutionResult>|Promise
*
* @api
*/
public function executePsrRequest(RequestInterface $request)
{
$parsedBody = $this->helper->parsePsrRequest($request);
return $this->executeRequest($parsedBody);
}
}