docs(state): advertising Linked Data Platform headers (Allow & Accept-Post)

Author: LaurentHuzard

src/State/Processor/LinkedDataPlatformProcessor.php

@@ -61,14 +61,14 @@ public function process(mixed $data, Operation $operation, array $uriVariables =
             foreach ($resource->getOperations() as $op) {
                 if ($op->getUriTemplate() === $operation->getUriTemplate()) {
                     $allowedMethods[] = $method = $op->getMethod();
-                    if ('POST' === $method && $outputFormats = $op->getOutputFormats()) {
-                        $acceptPost = array_map('strval', $outputFormats);
+                    if ('POST' === $method && \is_array($outputFormats = $op->getOutputFormats())) {
+                        $acceptPost = implode(', ', array_merge(...array_values($outputFormats)));
                     }
                 }
             }
         }
         if ($acceptPost) {
-            $response->headers->set('Accept-Post', implode(', ', array_values($acceptPost)));
+            $response->headers->set('Accept-Post', $acceptPost);
         }
 
         $response->headers->set('Allow', implode(', ', $allowedMethods));

src/State/Tests/Processor/LinkedDataPlatformProcessorTest.php

@@ -67,8 +67,9 @@ protected function setUp(): void
 
     public function testHeadersAcceptPostIsReturnWhenPostAllowed(): void
     {
-//        $operation = (new HttpOperation('GET', '/dummy{._format}', class: 'DummyResource'));
-        $operation = new Get('/dummy{._format}');
+        /** @var class-string $dummy */
+        $dummy = "dummy";
+        $operation = new Get('/dummy{._format}', class: $dummy);
 
         $context = $this->getContext();
 
@@ -101,7 +102,9 @@ public function testHeadersAcceptPostIsNotSetWhenPostIsNotAllowed(): void
 
     public function testHeaderAllowReflectsResourceAllowedMethods(): void
     {
-        $operation = new Get('/dummy{._format}', class: Dummy::class);
+        /** @var class-string $dummy */
+        $dummy = 'dummy';
+        $operation = new Get('/dummy{._format}', class: $dummy);
         $context = $this->getContext();
 
         $processor = new LinkedDataPlatformProcessor(
@@ -116,8 +119,9 @@ public function testHeaderAllowReflectsResourceAllowedMethods(): void
         $this->assertStringContainsString('HEAD', $allowHeader);
         $this->assertStringContainsString('GET', $allowHeader);
         $this->assertStringContainsString('POST', $allowHeader);
-
-        $operation = new Get('/dummy/{dummyResourceId}{._format}');
+        /** @var class-string $dummy */
+        $dummy = 'dummy';
+        $operation = new Get('/dummy/{dummyResourceId}{._format}', class: $dummy);
 
 
         /** @var Response $response */