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<?php declare (strict_types=1); namespace Rector\DeadCode\Rector\ClassConst; use PhpParser\Node; use PhpParser\Node\Stmt\ClassConst; use PHPStan\Reflection\ClassReflection; use Rector\Core\NodeAnalyzer\EnumAnalyzer; use Rector\Core\NodeManipulator\ClassConstManipulator; use Rector\Core\Rector\AbstractRector; use Rector\Core\Reflection\ReflectionResolver; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\DeadCode\Rector\ClassConst\RemoveUnusedPrivateClassConstantRector\RemoveUnusedPrivateClassConstantRectorTest */ final class RemoveUnusedPrivateClassConstantRector extends AbstractRector { /** * @readonly * @var \Rector\Core\NodeManipulator\ClassConstManipulator */ private $classConstManipulator; /** * @readonly * @var \Rector\Core\NodeAnalyzer\EnumAnalyzer */ private $enumAnalyzer; /** * @readonly * @var \Rector\Core\Reflection\ReflectionResolver */ private $reflectionResolver; public function __construct(ClassConstManipulator $classConstManipulator, EnumAnalyzer $enumAnalyzer, ReflectionResolver $reflectionResolver) { $this->classConstManipulator = $classConstManipulator; $this->enumAnalyzer = $enumAnalyzer; $this->reflectionResolver = $reflectionResolver; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Remove unused class constants', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { private const SOME_CONST = 'dead'; public function run() { } } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { public function run() { } } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [ClassConst::class]; } /** * @param ClassConst $node */ public function refactor(Node $node) : ?Node { if ($this->shouldSkipClassConst($node)) { return null; } $classReflection = $this->reflectionResolver->resolveClassReflection($node); if (!$classReflection instanceof ClassReflection) { return null; } if ($this->classConstManipulator->hasClassConstFetch($node, $classReflection)) { return null; } $this->removeNode($node); return null; } private function shouldSkipClassConst(ClassConst $classConst) : bool { if (!$classConst->isPrivate()) { return \true; } if (\count($classConst->consts) !== 1) { return \true; } return $this->enumAnalyzer->isEnumClassConst($classConst); } }
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