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ForbiddenExtendOfNonAbstractClassRule.php
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ForbiddenExtendOfNonAbstractClassRule.php
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<?php
declare(strict_types=1);
namespace Symplify\PHPStanRules\Rules;
use PhpParser\Node;
use PHPStan\Analyser\Scope;
use PHPStan\Node\InClassNode;
use PHPStan\Reflection\ClassReflection;
use PHPStan\Rules\Rule;
use Symplify\RuleDocGenerator\Contract\DocumentedRuleInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @see \Symplify\PHPStanRules\Tests\Rules\ForbiddenExtendOfNonAbstractClassRule\ForbiddenExtendOfNonAbstractClassRuleTest
*/
final class ForbiddenExtendOfNonAbstractClassRule implements Rule, DocumentedRuleInterface
{
/**
* @var string
*/
public const ERROR_MESSAGE = 'Only abstract classes can be extended';
/**
* @return class-string<Node>
*/
public function getNodeType(): string
{
return InClassNode::class;
}
/**
* @param InClassNode $node
* @return string[]
*/
public function processNode(Node $node, Scope $scope): array
{
$classReflection = $node->getClassReflection();
if ($classReflection->isAnonymous()) {
return [];
}
$parentClassReflection = $classReflection->getParentClass();
if (! $parentClassReflection instanceof ClassReflection) {
return [];
}
if ($parentClassReflection->isAbstract()) {
return [];
}
// skip native PHP classes
if ($parentClassReflection->isBuiltin()) {
return [];
}
// skip vendor based classes, as designed for extension
$fileName = $parentClassReflection->getFileName();
if (is_string($fileName) && str_contains($fileName, 'vendor')) {
return [];
}
return [self::ERROR_MESSAGE];
}
public function getRuleDefinition(): RuleDefinition
{
return new RuleDefinition(self::ERROR_MESSAGE, [
new CodeSample(
<<<'CODE_SAMPLE'
final class SomeClass extends ParentClass
{
}
class ParentClass
{
}
CODE_SAMPLE
,
<<<'CODE_SAMPLE'
final class SomeClass extends ParentClass
{
}
abstract class ParentClass
{
}
CODE_SAMPLE
),
]);
}
}