Migrated BodyParserMiddleware to psr-15 middleware

module/Rest/src/Middleware/BodyParserMiddleware.php

@@ -1,55 +1,45 @@
 <?php
 namespace Shlinkio\Shlink\Rest\Middleware;
 
+use Fig\Http\Message\RequestMethodInterface;
+use Interop\Http\ServerMiddleware\DelegateInterface;
+use Interop\Http\ServerMiddleware\MiddlewareInterface;
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Shlinkio\Shlink\Common\Exception\RuntimeException;
-use Zend\Stratigility\MiddlewareInterface;
 
-class BodyParserMiddleware implements MiddlewareInterface
+class BodyParserMiddleware implements MiddlewareInterface, RequestMethodInterface
 {
     /**
-     * Process an incoming request and/or response.
-     *
-     * Accepts a server-side request and a response instance, and does
-     * something with them.
-     *
-     * If the response is not complete and/or further processing would not
-     * interfere with the work done in the middleware, or if the middleware
-     * wants to delegate to another process, it can use the `$out` callable
-     * if present.
-     *
-     * If the middleware does not return a value, execution of the current
-     * request is considered complete, and the response instance provided will
-     * be considered the response to return.
-     *
-     * Alternately, the middleware may return a response instance.
-     *
-     * Often, middleware will `return $out();`, with the assumption that a
-     * later middleware will return a response.
+     * Process an incoming server request and return a response, optionally delegating
+     * to the next middleware component to create the response.
      *
      * @param Request $request
-     * @param Response $response
-     * @param null|callable $out
-     * @return null|Response
+     * @param DelegateInterface $delegate
+     *
+     * @return Response
      */
-    public function __invoke(Request $request, Response $response, callable $out = null)
+    public function process(Request $request, DelegateInterface $delegate)
     {
         $method = $request->getMethod();
         $currentParams = $request->getParsedBody();
 
         // In requests that do not allow body or if the body has already been parsed, continue to next middleware
-        if (in_array($method, ['GET', 'HEAD', 'OPTIONS']) || ! empty($currentParams)) {
-            return $out($request, $response);
+        if (! empty($currentParams) || in_array($method, [
+            self::METHOD_GET,
+            self::METHOD_HEAD,
+            self::METHOD_OPTIONS
+        ], true)) {
+            return $delegate->process($request);
         }
 
         // If the accepted content is JSON, try to parse the body from JSON
         $contentType = $this->getRequestContentType($request);
-        if (in_array($contentType, ['application/json', 'text/json', 'application/x-json'])) {
-            return $out($this->parseFromJson($request), $response);
+        if (in_array($contentType, ['application/json', 'text/json', 'application/x-json'], true)) {
+            return $delegate->process($this->parseFromJson($request));
         }
 
-        return $out($this->parseFromUrlEncoded($request), $response);
+        return $delegate->process($this->parseFromUrlEncoded($request));
     }
 
     /**