class GetDeprecatedServiceRule

final class GetDeprecatedServiceRule implements Rule {
    
    /**
     * @var ServiceMap
     */
    private $serviceMap;
    public function __construct(ServiceMap $serviceMap) {
        $this->serviceMap = $serviceMap;
    }
    public function getNodeType() : string {
        return Node\Expr\MethodCall::class;
    }
    public function processNode(Node $node, Scope $scope) : array {
        if (!$node->name instanceof Node\Identifier) {
            return [];
        }
        $method_name = $node->name
            ->toString();
        if ($method_name !== 'get') {
            return [];
        }
        $methodReflection = $scope->getMethodReflection($scope->getType($node->var), $node->name
            ->toString());
        if ($methodReflection === null) {
            return [];
        }
        $declaringClass = $methodReflection->getDeclaringClass();
        if ($declaringClass->getName() !== 'Symfony\\Component\\DependencyInjection\\ContainerInterface') {
            return [];
        }
        $serviceNameArg = $node->args[0];
        assert($serviceNameArg instanceof Node\Arg);
        $serviceName = $serviceNameArg->value;
        // @todo check if var, otherwise throw.
        // ACTUALLY what if it was a constant? can we use a resolver.
        if (!$serviceName instanceof Node\Scalar\String_) {
            return [];
        }
        $service = $this->serviceMap
            ->getService($serviceName->value);
        if ($service instanceof DrupalServiceDefinition && $service->isDeprecated()) {
            return [
                $service->getDeprecatedDescription(),
            ];
        }
        return [];
    }

}