IndexControllerFactory::createService()   B
last analyzed

Complexity

Conditions 3
Paths 4

Size

Total Lines 36
Code Lines 19

Duplication

Lines 0
Ratio 0 %

Importance

Changes 3
Bugs 0 Features 2
Metric Value
c 3
b 0
f 2
dl 0
loc 36
rs 8.8571
cc 3
eloc 19
nc 4
nop 1
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<?php
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namespace T4web\Authentication\Controller\User;
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use Zend\ServiceManager\FactoryInterface;
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use Zend\ServiceManager\ServiceLocatorInterface;
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use Zend\Mvc\Controller\Plugin\Redirect;
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use Zend\Mvc\Router\Http\RouteMatch;
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use Zend\Mvc\Application;
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use T4web\Authentication\Service\InteractiveAuth;
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class IndexControllerFactory implements FactoryInterface
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{
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    /**
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     * @param ServiceLocatorInterface $cm
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     * @return IndexController
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     */
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    public function createService(ServiceLocatorInterface $cm)
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    {
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        $sl = $cm->getServiceLocator();
0 ignored issues
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Bug introduced by
It seems like you code against a concrete implementation and not the interface Zend\ServiceManager\ServiceLocatorInterface as the method getServiceLocator() does only exist in the following implementations of said interface: Zend\Filter\FilterPluginManager, Zend\Form\FormElementMan...lementManagerV2Polyfill, Zend\Form\FormElementMan...lementManagerV3Polyfill, Zend\Hydrator\HydratorPluginManager, Zend\InputFilter\InputFilterPluginManager, Zend\Mvc\Controller\ControllerManager, Zend\Mvc\Controller\PluginManager, Zend\Mvc\Router\RoutePluginManager, Zend\ServiceManager\AbstractPluginManager, Zend\Validator\ValidatorPluginManager, Zend\View\HelperPluginManager, Zend\View\Helper\Navigation\PluginManager.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.

Available Fixes

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
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        /** @var Application $app */
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        $app = $sl->get('Application');
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        $event = $app->getMvcEvent();
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        /** @var RouteMatch $routeMatch */
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        $routeMatch = $event->getRouteMatch();
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        if ($routeMatch->getParam('layout')) {
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            $viewModel = $event->getViewModel();
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            $viewModel->setTemplate($routeMatch->getParam('layout'));
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        }
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        $redirectToUrl = '/';
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        if ($routeMatch->getParam('redirect-to-url')) {
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            $redirectToUrl = $routeMatch->getParam('redirect-to-url');
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        }
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        $plugins = $sl->get('ControllerPluginManager');
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        /** @var Redirect $redirect */
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        $redirect = $plugins->get('redirect');
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        $controller = new IndexController(
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            $sl->get(InteractiveAuth::class),
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            $redirect,
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            $redirectToUrl
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        );
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        $redirect->setController($controller);
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        return $controller;
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    }
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}
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