mirror of https://github.com/rectorphp/rector.git
102 lines
2.8 KiB
PHP
102 lines
2.8 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\TypeDeclaration\Rector\Empty_;
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use PhpParser\Node;
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use PhpParser\Node\Expr\ArrayDimFetch;
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use PhpParser\Node\Expr\BooleanNot;
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use PhpParser\Node\Expr\Empty_;
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use PhpParser\Node\Expr\Instanceof_;
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use PhpParser\Node\Name;
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use PHPStan\Type\ObjectType;
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use Rector\PHPStanStaticTypeMapper\Enum\TypeKind;
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use Rector\Rector\AbstractRector;
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use Rector\StaticTypeMapper\StaticTypeMapper;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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/**
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* @see \Rector\Tests\TypeDeclaration\Rector\Empty_\EmptyOnNullableObjectToInstanceOfRector\EmptyOnNullableObjectToInstanceOfRectorTest
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*/
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final class EmptyOnNullableObjectToInstanceOfRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\StaticTypeMapper\StaticTypeMapper
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*/
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private $staticTypeMapper;
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public function __construct(StaticTypeMapper $staticTypeMapper)
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{
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$this->staticTypeMapper = $staticTypeMapper;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Change empty() on nullable object to instanceof check', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run(?AnotherObject $anotherObject)
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{
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if (empty($anotherObject)) {
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return false;
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}
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return true;
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run(?AnotherObject $anotherObject)
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{
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if (! $anotherObject instanceof AnotherObject) {
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return false;
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}
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return true;
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}
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}
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CODE_SAMPLE
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)]);
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}
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/**
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* @return array<class-string<Node>>
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*/
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public function getNodeTypes() : array
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{
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return [Empty_::class, BooleanNot::class];
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}
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/**
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* @param Empty_|BooleanNot $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if ($node instanceof BooleanNot) {
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if (!$node->expr instanceof Empty_) {
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return null;
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}
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$isNegated = \true;
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$empty = $node->expr;
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} else {
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$empty = $node;
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$isNegated = \false;
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}
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if ($empty->expr instanceof ArrayDimFetch) {
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return null;
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}
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$exprType = $this->nodeTypeResolver->getNativeType($empty->expr);
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if (!$exprType instanceof ObjectType) {
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return null;
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}
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$objectType = $this->staticTypeMapper->mapPHPStanTypeToPhpParserNode($exprType, TypeKind::RETURN);
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if (!$objectType instanceof Name) {
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return null;
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}
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$instanceof = new Instanceof_($empty->expr, $objectType);
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if ($isNegated) {
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return $instanceof;
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}
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return new BooleanNot($instanceof);
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}
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}
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