rector/rules/Php71/NodeAnalyzer/CountableAnalyzer.php

<?php

declare (strict_types=1);
namespace Rector\Php71\NodeAnalyzer;

use PhpParser\Node\Expr;
use PhpParser\Node\Expr\Array_;
use PhpParser\Node\Expr\PropertyFetch;
use PhpParser\Node\Stmt;
use PHPStan\Reflection\ReflectionProvider;
use PHPStan\Type\TypeWithClassName;
use PHPStan\Type\UnionType;
use Rector\NodeNameResolver\NodeNameResolver;
use Rector\NodeTypeResolver\NodeTypeResolver;
final class CountableAnalyzer
{
    /**
     * @var \Rector\NodeTypeResolver\NodeTypeResolver
     */
    private $nodeTypeResolver;
    /**
     * @var \Rector\NodeNameResolver\NodeNameResolver
     */
    private $nodeNameResolver;
    /**
     * @var \PHPStan\Reflection\ReflectionProvider
     */
    private $reflectionProvider;
    public function __construct(\Rector\NodeTypeResolver\NodeTypeResolver $nodeTypeResolver, \Rector\NodeNameResolver\NodeNameResolver $nodeNameResolver, \PHPStan\Reflection\ReflectionProvider $reflectionProvider)
    {
        $this->nodeTypeResolver = $nodeTypeResolver;
        $this->nodeNameResolver = $nodeNameResolver;
        $this->reflectionProvider = $reflectionProvider;
    }
    public function isCastableArrayType(\PhpParser\Node\Expr $expr) : bool
    {
        if (!$expr instanceof \PhpParser\Node\Expr\PropertyFetch) {
            return \false;
        }
        $callerObjectType = $this->nodeTypeResolver->resolve($expr->var);
        $propertyName = $this->nodeNameResolver->getName($expr->name);
        if (!\is_string($propertyName)) {
            return \false;
        }
        if ($callerObjectType instanceof \PHPStan\Type\UnionType) {
            $callerObjectType = $callerObjectType->getTypes()[0];
        }
        if (!$callerObjectType instanceof \PHPStan\Type\TypeWithClassName) {
            return \false;
        }
        if (\is_a($callerObjectType->getClassName(), \PhpParser\Node\Stmt::class, \true)) {
            return \false;
        }
        if (\is_a($callerObjectType->getClassName(), \PhpParser\Node\Expr\Array_::class, \true)) {
            return \false;
        }
        // this must be handled reflection, as PHPStan ReflectionProvider does not provide default values for properties in any way
        $classReflection = $this->reflectionProvider->getClass($callerObjectType->getClassName());
        $nativeReflectionClass = $classReflection->getNativeReflection();
        $propertiesDefaults = $nativeReflectionClass->getDefaultProperties();
        if (!\array_key_exists($propertyName, $propertiesDefaults)) {
            return \false;
        }
        $propertyDefaultValue = $propertiesDefaults[$propertyName];
        return $propertyDefaultValue === null;
    }
}