Fix message handler removal in RemoveUnusedPublicMethodParameterRector

rules-tests/DeadCode/Rector/ClassMethod/RemoveUnusedPublicMethodParameterRector/Fixture/skip_command_handler.php.inc

@@ -0,0 +1,13 @@
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveUnusedPublicMethodParameterRector\Fixture;
+
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler]
+final readonly class SkipCommandHandler
+{
+    public function __invoke(string $name): void
+    {
+    }
+}

rules/DeadCode/Rector/ClassMethod/RemoveUnusedPublicMethodParameterRector.php

@@ -11,6 +11,7 @@
 use Rector\DeadCode\NodeManipulator\ClassMethodParamRemover;
 use Rector\DeadCode\NodeManipulator\VariadicFunctionLikeDetector;
 use Rector\NodeAnalyzer\MagicClassMethodAnalyzer;
+use Rector\Php80\NodeAnalyzer\PhpAttributeAnalyzer;
 use Rector\Rector\AbstractRector;
 use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
 use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
@@ -23,7 +24,8 @@ final class RemoveUnusedPublicMethodParameterRector extends AbstractRector
     public function __construct(
         private readonly VariadicFunctionLikeDetector $variadicFunctionLikeDetector,
         private readonly ClassMethodParamRemover $classMethodParamRemover,
-        private readonly MagicClassMethodAnalyzer $magicClassMethodAnalyzer
+        private readonly MagicClassMethodAnalyzer $magicClassMethodAnalyzer,
+        private readonly PhpAttributeAnalyzer $phpAttributeAnalyzer,
     ) {
     }
 
@@ -72,26 +74,14 @@ public function getNodeTypes(): array
      */
     public function refactor(Node $node): ?Node
     {
-        // may has child, or override parent that needs follow signature
+        // may have child, or override parent that needs to follow the signature
         if (! $node->isFinal() || $node->extends instanceof FullyQualified || $node->implements !== []) {
             return null;
         }
 
         $hasChanged = false;
         foreach ($node->getMethods() as $classMethod) {
-            if (! $classMethod->isPublic()) {
-                continue;
-            }
-
-            if ($classMethod->params === []) {
-                continue;
-            }
-
-            if ($this->magicClassMethodAnalyzer->isUnsafeOverridden($classMethod)) {
-                continue;
-            }
-
-            if ($this->variadicFunctionLikeDetector->isVariadic($classMethod)) {
+            if ($this->shouldSkipClassMethod($classMethod, $node)) {
                 continue;
             }
 
@@ -109,4 +99,30 @@ public function refactor(Node $node): ?Node
 
         return null;
     }
+
+    private function shouldSkipClassMethod(ClassMethod $classMethod, Class_ $class): bool
+    {
+        // private method is handled by different rule
+        if (! $classMethod->isPublic()) {
+            return true;
+        }
+
+        if ($classMethod->params === []) {
+            return true;
+        }
+
+        // parameter is required for contract coupling
+        if ($this->isName($classMethod->name, '__invoke') && $this->phpAttributeAnalyzer->hasPhpAttribute(
+            $class,
+            'Symfony\Component\Messenger\Attribute\AsMessageHandler'
+        )) {
+            return true;
+        }
+
+        if ($this->magicClassMethodAnalyzer->isUnsafeOverridden($classMethod)) {
+            return true;
+        }
+
+        return $this->variadicFunctionLikeDetector->isVariadic($classMethod);
+    }
 }