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CommandHandler/ComposerToolCommandHandler.php (2 issues)

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strict.coding_against_concrete_implementation

Bug Minor
Introduced By

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1 
<?php
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namespace PhpGitHooks\Module\Composer\Contract\CommandHandler;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use PhpGitHooks\Infrastructure\CommandBus\CommandBus\CommandHandlerInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use PhpGitHooks\Infrastructure\CommandBus\CommandBus\CommandInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use PhpGitHooks\Module\Composer\Contract\Command\ComposerToolCommand;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use PhpGitHooks\Module\Composer\Service\ComposerTool;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class ComposerToolCommandHandler implements CommandHandlerInterface

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @var ComposerTool

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    private $composerTool;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * ComposerToolCommandHandler constructor.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     *

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param ComposerTool $composerTool

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function __construct(ComposerTool $composerTool)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->composerTool = $composerTool;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     * @param CommandInterface|ComposerToolCommand $command

            


            
                                                        
            
                                    
            
            

                
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     */

            


            
                                                        
            
                                    
            
            

                
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    public function handle(CommandInterface $command)

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        $this->composerTool->execute($command->getFiles(), $command->getErrorMessage());

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                                                                        
                        

                            
                            
0 ignored issues

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            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
It seems like you code against a concrete implementation and not the interface PhpGitHooks\Infrastructu...andBus\CommandInterface as the method getFiles() does only exist in the following implementations of said interface: PhpGitHooks\Module\Compo...and\ComposerToolCommand, PhpGitHooks\Module\JsonL...and\JsonLintToolCommand, PhpGitHooks\Module\PhpCs...d\PhpCsFixerToolCommand, PhpGitHooks\Module\PhpCs...ommand\PhpCsToolCommand, PhpGitHooks\Module\PhpLi...mand\PhpLintToolCommand, PhpGitHooks\Module\PhpMd...ommand\PhpMdToolCommand.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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. 

  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.'
            );
        }

    }
}

    

    

    3. 




 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();
}

    

    

    2. 



                        

                                                    

                     Loading history...
                

                    


    




                                                                                            




    

        
            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
It seems like you code against a concrete implementation and not the interface PhpGitHooks\Infrastructu...andBus\CommandInterface as the method getErrorMessage() does only exist in the following implementations of said interface: PhpGitHooks\Module\Compo...and\ComposerToolCommand, PhpGitHooks\Module\JsonL...and\JsonLintToolCommand, PhpGitHooks\Module\PhpCs...d\PhpCsFixerToolCommand, PhpGitHooks\Module\PhpCs...ommand\PhpCsToolCommand, PhpGitHooks\Module\PhpLi...mand\PhpLintToolCommand, PhpGitHooks\Module\PhpMd...ommand\PhpMdToolCommand, PhpGitHooks\Module\PhpUn...mand\PhpUnitToolCommand, PhpGitHooks\Module\PhpUn...d\StrictCoverageCommand.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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. 

  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.'
            );
        }

    }
}

    

    

    3. 




 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();
}

    

    

    2. 



                        

                                                    

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