DoctrineStep::checkRequirements()   A
last analyzed

Complexity

Conditions 3
Paths 3

Size

Total Lines 20
Code Lines 12

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
c 0
b 0
f 0
dl 0
loc 20
rs 9.4285
cc 3
eloc 12
nc 3
nop 0
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<?php
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/**
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 * This file is part of Dedipanel project
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 *
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 * (c) 2010-2015 Dedipanel <http://www.dedicated-panel.net>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace DP\Core\DistributionBundle\Configurator\Step;
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use Symfony\Component\DependencyInjection\ContainerInterface;
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use DP\Core\DistributionBundle\Configurator\Form\DoctrineStepType;
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use Symfony\Component\Validator\Constraints as Assert;
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use Doctrine\DBAL\DriverManager;
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/**
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 * Doctrine Step.
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 *
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 * @author Fabien Potencier <[email protected]>
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 */
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class DoctrineStep implements StepInterface
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{
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    /**
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     * @Assert\NotBlank(message="configurator.db.host.blank")
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     */
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    public $host;
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    public $port;
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    /**
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     * @Assert\NotBlank(message="configurator.db.name.blank")
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     */
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    public $name;
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    /**
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     * @Assert\NotBlank(message="configurator.db.user.blank")
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     */
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    public $user;
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    public $password;
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    private $container;
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    public function __construct(ContainerInterface $container)
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    {
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        $this->container = $container;
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        $installer = $container->get('dp.webinstaller');
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        $parameters = $installer->getConfigParameters();
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        foreach ($parameters as $key => $value) {
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            if (0 === strpos($key, 'database_')) {
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                $parameters[substr($key, 9)] = $value;
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                $key = substr($key, 9);
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                switch ($key) {
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                    case 'host':
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                    case 'port':
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                    case 'name':
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                    case 'user':
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                    case 'password':
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                        $this->$key = $value;
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                    break;
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                }
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            }
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        }
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    }
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    /**
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     * @see StepInterface
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     */
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    public function getFormType()
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    {
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        return new DoctrineStepType();
0 ignored issues
show
Bug Best Practice introduced by
The return type of return new \DP\Core\Dist...orm\DoctrineStepType(); (DP\Core\DistributionBund...r\Form\DoctrineStepType) is incompatible with the return type declared by the interface DP\Core\DistributionBund...pInterface::getFormType of type DP\Core\DistributionBund...rator\Step\UserStepType.

If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.

Let’s take a look at an example:

class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}

Our function my_function expects a Post object, and outputs the author of the post. The base class Post returns a simple string and outputting a simple string will work just fine. However, the child class BlogPost which is a sub-type of Post instead decided to return an object, and is therefore violating the SOLID principles. If a BlogPost were passed to my_function, PHP would not complain, but ultimately fail when executing the strtoupper call in its body.

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    }
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    /**
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     * @see StepInterface
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     */
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    public function checkRequirements()
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    {
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        $messages = array();
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        $messages['configurator.pdo_mandatory'] = true;
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        $messages['configurator.mysql_extension_mandatory'] = true;
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        if (!class_exists('\PDO')) {
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             $messages['configurator.pdo_mandatory'] = false;
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             $messages['configurator.mysql_extension_mandatory'] = false;
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        } else {
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            $drivers = \PDO::getAvailableDrivers();
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            if (!in_array('mysql', $drivers)) {
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                $messages['configurator.mysql_extension_mandatory'] = false;
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            }
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        }
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        return $messages;
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    }
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    /**
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     * @see StepInterface
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     */
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    public function checkOptionalSettings()
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    {
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        return array();
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    }
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    public function run(StepInterface $data, $configType)
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    {
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        if (!$data instanceof DoctrineStep) {
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            throw new \RuntimeException("Can't manage another step that itself.");
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        }
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        $errors = array();
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        $configurator = $this->container->get('dp.webinstaller');
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        $parameters = array();
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        /*
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         * @var array $data
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         */
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        foreach ($data as $key => $value) {
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            $parameters['database_' . $key] = $value;
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        }
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        if (!$configurator->isFileWritable()) {
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            $errors[] =  'Your app/config/parameters.yml is not writable.';
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        }
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        if (!$this->testConnection($data->host, $data->user, $data->password, $data->port, $data->name)) {
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            return array_merge($errors, array('configurator.db.connectionTest'));
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        }
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        $configurator->mergeParameters($parameters);
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        if (!$configurator->write()) {
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            return array_merge($errors, array('An error occured while writing the app/config/parameters.yml file.'));
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        }
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        // Suppression "hard" du cache (sinon les nouveaux paramètres ne sont pas pris en compte)
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        $cacheFile = $configurator->getKernelDir() . '/cache/installer/appInstallerProjectContainer.php';
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        if (file_exists($cacheFile)) {
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            unlink($cacheFile);
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        }
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    }
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    /**
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     * Trying to connect to the database
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     *
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     * @param string $dbname
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     * @return bool
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     */
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    private function testConnection($host, $user, $password, $port, $dbname)
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    {
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        try {
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            $conn = DriverManager::getConnection(array(
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                'driver' => 'pdo_mysql',
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                'user' => $user,
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                'password' => $password,
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                'host' => $host,
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                'port' => $port,
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                'dbname' => $dbname,
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            ));
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            $conn->connect();
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            $conn->close();
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            return true;
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        }
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        catch (\Exception $e) {
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            // var_dump($e->getMessage());
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        }
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        return false;
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    }
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    /**
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     * @see StepInterface
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     */
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    public function getTemplate()
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    {
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        return 'DPDistributionBundle:Configurator/Step:doctrine.html.twig';
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    }
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    public function getTitle()
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    {
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        return 'configurator.db.title';
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    }
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    /**
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     * @return array
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     */
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    static public function getDriverKeys()
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    {
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        return array_keys(static::getDrivers());
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    }
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    /**
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     * @return array
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     */
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    static public function getDrivers()
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    {
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        return array(
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            'pdo_mysql'  => 'MySQL (PDO)',
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            'pdo_sqlite' => 'SQLite (PDO)',
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            'pdo_pgsql'  => 'PosgreSQL (PDO)',
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            'oci8'       => 'Oracle (native)',
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            'ibm_db2'    => 'IBM DB2 (native)',
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            'pdo_oci'    => 'Oracle (PDO)',
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            'pdo_ibm'    => 'IBM DB2 (PDO)',
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            'pdo_sqlsrv' => 'SQLServer (PDO)',
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        );
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    }
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    public function isInstallStep()
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    {
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        return true;
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    }
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    public function isUpdateStep()
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    {
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        return false;
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    }
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}
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