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<?php |
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declare(strict_types=1); |
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namespace SavinMikhail\CommentsDensity\MissingDocblock\Visitors; |
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use phpDocumentor\Reflection\DocBlockFactory; |
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use PhpParser\Node; |
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use PhpParser\Node\Expr\MethodCall; |
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use PhpParser\Node\Expr\Throw_; |
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use PhpParser\Node\Expr\Variable; |
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use PhpParser\Node\Stmt\Class_; |
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use PhpParser\Node\Stmt\ClassMethod; |
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use PhpParser\Node\Stmt\TryCatch; |
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use PhpParser\NodeVisitorAbstract; |
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use ReflectionClass; |
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final class UncaughtExceptionVisitor extends NodeVisitorAbstract |
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{ |
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private MethodRegistrar $methodRegistrar; |
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private ExceptionChecker $exceptionChecker; |
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private DocBlockFactory $docBlockFactory; |
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public function __construct(?Class_ $class) |
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{ |
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$this->methodRegistrar = new MethodRegistrar($class); |
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$this->exceptionChecker = new ExceptionChecker(); |
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$this->docBlockFactory = DocBlockFactory::createInstance(); |
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} |
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public function hasUncaughtException(): bool |
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{ |
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return $this->exceptionChecker->hasUncaughtThrows; |
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} |
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public function enterNode(Node $node): ?Node |
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{ |
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if ($node instanceof ClassMethod) { |
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$this->methodRegistrar->registerClassMethod($node); |
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} |
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if ($node instanceof TryCatch) { |
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$this->exceptionChecker->pushTryCatch($node); |
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} |
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if ($node instanceof Throw_) { |
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$this->exceptionChecker->checkIfExceptionIsCaught($node); |
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} |
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if ($node instanceof MethodCall) { |
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$this->checkMethodCallForThrowingUncaughtException($node); |
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} |
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return null; |
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} |
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public function leaveNode(Node $node): ?Node |
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{ |
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if ($node instanceof TryCatch) { |
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$this->exceptionChecker->popTryCatch(); |
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} |
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return null; |
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} |
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private function checkMethodCallForThrowingUncaughtException(MethodCall $node): void |
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{ |
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$methodName = $node->name->name; |
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if (!isset($node->var->name)) { |
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return; |
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} |
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$objectName = (string) $node->var->name; |
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$class = $this->methodRegistrar->getVariableTypes()[$objectName] ?? null; |
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if (!$class) { |
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return; |
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} |
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$exceptions = $this->getMethodThrownExceptions($class, $methodName); |
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foreach ($exceptions as $exception) { |
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$throwNode = new Throw_(new Variable($exception), $node->getAttributes()); |
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$this->exceptionChecker->checkIfExceptionIsCaught($throwNode); |
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} |
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} |
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private function getMethodThrownExceptions(string $className, string $methodName): array |
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{ |
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if (!class_exists($className)) { |
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return []; |
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} |
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$reflectionClass = new ReflectionClass($className); |
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if (!$reflectionClass->hasMethod($methodName)) { |
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return []; |
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} |
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$reflectionMethod = $reflectionClass->getMethod($methodName); |
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$docComment = $reflectionMethod->getDocComment(); |
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if (!$docComment) { |
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return []; |
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} |
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$docBlock = $this->docBlockFactory->create($docComment); |
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$exceptions = []; |
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foreach ($docBlock->getTagsByName('throws') as $tag) { |
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$exceptions[] = (string)$tag->getType(); |
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} |
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return $exceptions; |
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} |
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} |
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savinmikhail /
Comments-Density
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