mirror of https://github.com/rectorphp/rector.git
133 lines
4.2 KiB
PHP
133 lines
4.2 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\DeadCode\Rector\Cast;
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use PhpParser\Node;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Expr\Cast;
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use PhpParser\Node\Expr\Cast\Array_;
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use PhpParser\Node\Expr\Cast\Bool_;
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use PhpParser\Node\Expr\Cast\Double;
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use PhpParser\Node\Expr\Cast\Int_;
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use PhpParser\Node\Expr\Cast\Object_;
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use PhpParser\Node\Expr\Cast\String_;
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use PhpParser\Node\Expr\MethodCall;
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use PhpParser\Node\Expr\StaticCall;
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use PHPStan\Reflection\Php\PhpPropertyReflection;
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use PHPStan\Type\ArrayType;
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use PHPStan\Type\BooleanType;
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use PHPStan\Type\FloatType;
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use PHPStan\Type\IntegerType;
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use PHPStan\Type\MixedType;
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use PHPStan\Type\ObjectType;
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use PHPStan\Type\StringType;
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use PHPStan\Type\Type;
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use Rector\NodeAnalyzer\ExprAnalyzer;
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use Rector\NodeAnalyzer\PropertyFetchAnalyzer;
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use Rector\Rector\AbstractRector;
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use Rector\Reflection\ReflectionResolver;
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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\DeadCode\Rector\Cast\RecastingRemovalRector\RecastingRemovalRectorTest
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*/
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final class RecastingRemovalRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\NodeAnalyzer\PropertyFetchAnalyzer
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*/
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private $propertyFetchAnalyzer;
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/**
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* @readonly
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* @var \Rector\Reflection\ReflectionResolver
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*/
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private $reflectionResolver;
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/**
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* @readonly
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* @var \Rector\NodeAnalyzer\ExprAnalyzer
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*/
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private $exprAnalyzer;
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/**
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* @var array<class-string<Node>, class-string<Type>>
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*/
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private const CAST_CLASS_TO_NODE_TYPE = [String_::class => StringType::class, Bool_::class => BooleanType::class, Array_::class => ArrayType::class, Int_::class => IntegerType::class, Object_::class => ObjectType::class, Double::class => FloatType::class];
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public function __construct(PropertyFetchAnalyzer $propertyFetchAnalyzer, ReflectionResolver $reflectionResolver, ExprAnalyzer $exprAnalyzer)
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{
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$this->propertyFetchAnalyzer = $propertyFetchAnalyzer;
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$this->reflectionResolver = $reflectionResolver;
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$this->exprAnalyzer = $exprAnalyzer;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Removes recasting of the same type', [new CodeSample(<<<'CODE_SAMPLE'
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$string = '';
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$string = (string) $string;
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$array = [];
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$array = (array) $array;
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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$string = '';
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$string = $string;
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$array = [];
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$array = $array;
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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 [Cast::class];
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}
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/**
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* @param Cast $node
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*/
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public function refactor(Node $node) : ?Node
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{
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$nodeClass = \get_class($node);
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if (!isset(self::CAST_CLASS_TO_NODE_TYPE[$nodeClass])) {
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return null;
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}
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$nodeType = $this->nodeTypeResolver->getNativeType($node->expr);
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if ($nodeType instanceof MixedType) {
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return null;
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}
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$sameNodeType = self::CAST_CLASS_TO_NODE_TYPE[$nodeClass];
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if (!$nodeType instanceof $sameNodeType) {
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return null;
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}
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if ($this->shouldSkip($node->expr)) {
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return null;
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}
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if ($this->shouldSkipCall($node->expr)) {
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return null;
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}
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return $node->expr;
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}
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private function shouldSkipCall(Expr $expr) : bool
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{
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if (!$expr instanceof MethodCall && !$expr instanceof StaticCall) {
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return \false;
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}
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$type = $this->nodeTypeResolver->getNativeType($expr);
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return $type instanceof MixedType && !$type->isExplicitMixed();
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}
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private function shouldSkip(Expr $expr) : bool
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{
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if (!$this->propertyFetchAnalyzer->isPropertyFetch($expr)) {
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return $this->exprAnalyzer->isNonTypedFromParam($expr);
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}
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$phpPropertyReflection = $this->reflectionResolver->resolvePropertyReflectionFromPropertyFetch($expr);
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if (!$phpPropertyReflection instanceof PhpPropertyReflection) {
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return \true;
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}
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$nativeType = $phpPropertyReflection->getNativeType();
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return $nativeType instanceof MixedType;
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}
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}
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