fix(openapi): entrypoint access vnd+openapi (#6012)

fixes #6010

Author: soyuka

features/openapi/entrypoint.feature

@@ -0,0 +1,19 @@
+Feature: Entrypoint support
+ In order to build an auto-discoverable API
+ As a client software developer
+ I need to access to an entrypoint listing top-level resources
+
+ Scenario: Retrieve the Entrypoint
+ When I add "Accept" header equal to "application/vnd.openapi+json"
+ When I send a "GET" request to "/"
+ Then the response status code should be 200
+ And the response should be in JSON
+ And the header "Content-Type" should be equal to "application/vnd.openapi+json; charset=utf-8"
+ And the JSON should be sorted
+
+ Scenario: Retrieve the Entrypoint with url format
+ When I send a "GET" request to "/index.jsonopenapi"
+ Then the response status code should be 200
+ And the response should be in JSON
+ And the header "Content-Type" should be equal to "application/vnd.openapi+json; charset=utf-8"
+ And the JSON should be sorted

src/Symfony/Bundle/Resources/config/legacy/events.xml

@@ -10,7 +10,7 @@
  <argument>%api_platform.formats%</argument>
  <argument>%api_platform.error_formats%</argument>
  <argument>%api_platform.docs_formats%</argument>
- <argument>%api_platform.event_listeners_backward_compatibility_layer%</argument>
+ <argument>null</argument>
 
  <tag name="kernel.event_listener" event="kernel.request" method="onKernelRequest" priority="28" />
  </service>

src/Symfony/EventListener/AddFormatListener.php

@@ -34,7 +34,7 @@ final class AddFormatListener
 {
  use OperationRequestInitiatorTrait;
 
- public function __construct(private readonly Negotiator $negotiator, ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory = null, private readonly array $formats = [], private readonly array $errorFormats = [], private readonly array $docsFormats = [], private readonly bool $eventsBackwardCompatibility = true)
+ public function __construct(private readonly Negotiator $negotiator, ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory = null, private readonly array $formats = [], private readonly array $errorFormats = [], private readonly array $docsFormats = [], private readonly ?bool $eventsBackwardCompatibility = null) // @phpstan-ignore-line
  {
  $this->resourceMetadataCollectionFactory = $resourceMetadataCollectionFactory;
  }
@@ -50,7 +50,11 @@ public function onKernelRequest(RequestEvent $event): void
  $request = $event->getRequest();
  $operation = $this->initializeOperation($request);
 
- if ('api_platform.symfony.main_controller' === $operation?->getController() || ($this->eventsBackwardCompatibility && 'api_platform.action.entrypoint' === $request->attributes->get('_controller')) || $request->attributes->get('_api_platform_disable_listeners')) {
+ if ('api_platform.action.entrypoint' === $request->attributes->get('_controller')) {
+ return;
+ }
+
+ if ('api_platform.symfony.main_controller' === $operation?->getController() || $request->attributes->get('_api_platform_disable_listeners')) {
  return;
  }