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<?php declare (strict_types=1); namespace Rector\DeadCode\Rector\ClassMethod; use PhpParser\Node; use PhpParser\Node\Expr; use PhpParser\Node\Expr\StaticCall; use PhpParser\Node\Stmt; use PhpParser\Node\Stmt\Class_; use PhpParser\Node\Stmt\ClassLike; use PhpParser\Node\Stmt\ClassMethod; use PhpParser\Node\Stmt\Expression; use PhpParser\Node\Stmt\Return_; use Rector\Core\Rector\AbstractRector; use Rector\DeadCode\Comparator\CurrentAndParentClassMethodComparator; use Rector\Php80\NodeAnalyzer\PhpAttributeAnalyzer; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\DeadCode\Rector\ClassMethod\RemoveDelegatingParentCallRector\RemoveDelegatingParentCallRectorTest */ final class RemoveDelegatingParentCallRector extends AbstractRector { /** * @var string[] */ private const ALLOWED_ANNOTATIONS = ['Route', 'required']; /** * @var string[] */ private const ALLOWED_ATTRIBUTES = ['Symfony\\Component\\Routing\\Annotation\\Route', 'Symfony\\Contracts\\Service\\Attribute\\Required']; /** * @readonly * @var \Rector\DeadCode\Comparator\CurrentAndParentClassMethodComparator */ private $currentAndParentClassMethodComparator; /** * @readonly * @var \Rector\Php80\NodeAnalyzer\PhpAttributeAnalyzer */ private $phpAttributeAnalyzer; public function __construct(CurrentAndParentClassMethodComparator $currentAndParentClassMethodComparator, PhpAttributeAnalyzer $phpAttributeAnalyzer) { $this->currentAndParentClassMethodComparator = $currentAndParentClassMethodComparator; $this->phpAttributeAnalyzer = $phpAttributeAnalyzer; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Removed dead parent call, that does not change anything', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { public function prettyPrint(array $stmts): string { return parent::prettyPrint($stmts); } } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [ClassMethod::class]; } /** * @param ClassMethod $node */ public function refactor(Node $node) : ?Node { $classLike = $this->betterNodeFinder->findParentType($node, Class_::class); if ($this->shouldSkipClass($classLike)) { return null; } $onlyStmt = $this->matchClassMethodOnlyStmt($node); if ($onlyStmt === null) { return null; } // are both return? if ($this->isMethodReturnType($node, 'void') && !$onlyStmt instanceof Return_) { return null; } $staticCall = $this->matchStaticCall($onlyStmt); if (!$staticCall instanceof StaticCall) { return null; } if (!$this->currentAndParentClassMethodComparator->isParentCallMatching($node, $staticCall)) { return null; } if ($this->shouldSkipWithAnnotationsOrAttributes($node)) { return null; } // the method is just delegation, nothing extra $this->removeNode($node); return null; } private function shouldSkipClass(?ClassLike $classLike) : bool { if (!$classLike instanceof Class_) { return \true; } return $classLike->extends === null; } private function isMethodReturnType(ClassMethod $classMethod, string $type) : bool { if ($classMethod->returnType === null) { return \false; } return $this->isName($classMethod->returnType, $type); } /** * @param \PhpParser\Node\Expr|\PhpParser\Node\Stmt $node */ private function matchStaticCall($node) : ?StaticCall { // must be static call if ($node instanceof Return_) { if ($node->expr instanceof StaticCall) { return $node->expr; } return null; } if ($node instanceof StaticCall) { return $node; } return null; } private function shouldSkipWithAnnotationsOrAttributes(ClassMethod $classMethod) : bool { $phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($classMethod); if ($phpDocInfo->hasByNames(self::ALLOWED_ANNOTATIONS)) { return \true; } return $this->phpAttributeAnalyzer->hasPhpAttributes($classMethod, self::ALLOWED_ATTRIBUTES); } /** * @return null|\PhpParser\Node\Stmt|\PhpParser\Node\Expr */ private function matchClassMethodOnlyStmt(ClassMethod $classMethod) { $classMethodStmts = $classMethod->stmts; if ($classMethodStmts === null) { return null; } if (\count($classMethodStmts) !== 1) { return null; } // recount empty notes $stmtsValues = \array_values($classMethodStmts); $stmtValue = $stmtsValues[0]; if ($stmtValue instanceof Expression) { return $stmtValue->expr; } return $stmtValue; } }
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