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<?php declare (strict_types=1); namespace Rector\Strict\Rector\Empty_; use PhpParser\Node; use PhpParser\Node\Expr; use PhpParser\Node\Expr\ArrayDimFetch; use PhpParser\Node\Expr\BooleanNot; use PhpParser\Node\Expr\Empty_; use PHPStan\Analyser\Scope; use Rector\NodeTypeResolver\Node\AttributeKey; use Rector\Strict\NodeFactory\ExactCompareFactory; use Rector\Strict\Rector\AbstractFalsyScalarRuleFixerRector; use Symplify\RuleDocGenerator\ValueObject\CodeSample\ConfiguredCodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\Strict\Rector\Empty_\DisallowedEmptyRuleFixerRector\DisallowedEmptyRuleFixerRectorTest */ final class DisallowedEmptyRuleFixerRector extends AbstractFalsyScalarRuleFixerRector { /** * @readonly * @var \Rector\Strict\NodeFactory\ExactCompareFactory */ private $exactCompareFactory; public function __construct(ExactCompareFactory $exactCompareFactory) { $this->exactCompareFactory = $exactCompareFactory; } public function getRuleDefinition() : RuleDefinition { $errorMessage = \sprintf('Fixer for PHPStan reports by strict type rule - "%s"', 'PHPStan\\Rules\\DisallowedConstructs\\DisallowedEmptyRule'); return new RuleDefinition($errorMessage, [new ConfiguredCodeSample(<<<'CODE_SAMPLE' final class SomeEmptyArray { public function run(array $items) { return empty($items); } } CODE_SAMPLE , <<<'CODE_SAMPLE' final class SomeEmptyArray { public function run(array $items) { return $items === []; } } CODE_SAMPLE , [self::TREAT_AS_NON_EMPTY => \false])]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [Empty_::class, BooleanNot::class]; } /** * @param Empty_|BooleanNot $node * @return \PhpParser\Node\Expr|null */ public function refactor(Node $node) { $scope = $node->getAttribute(AttributeKey::SCOPE); if (!$scope instanceof Scope) { return null; } if ($node instanceof BooleanNot) { return $this->refactorBooleanNot($node, $scope); } if ($node->expr instanceof ArrayDimFetch) { return null; } return $this->refactorEmpty($node, $scope, $this->treatAsNonEmpty); } /** * @return \PhpParser\Node\Expr|null */ private function refactorBooleanNot(BooleanNot $booleanNot, Scope $scope) { if (!$booleanNot->expr instanceof Empty_) { return null; } $empty = $booleanNot->expr; $emptyExprType = $scope->getType($empty->expr); return $this->exactCompareFactory->createNotIdenticalFalsyCompare($emptyExprType, $empty->expr, $this->treatAsNonEmpty); } /** * @return \PhpParser\Node\Expr|null */ private function refactorEmpty(Empty_ $empty, Scope $scope, bool $treatAsNonEmpty) { $exprType = $scope->getType($empty->expr); return $this->exactCompareFactory->createIdenticalFalsyCompare($exprType, $empty->expr, $treatAsNonEmpty); } }
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