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Application   A
last analyzed

↳ Parent: Project

Complexity

Total Complexity 3

Size/Duplication

Total Lines 21
Duplicated Lines 0 %

Coupling/Cohesion

Components 0
Dependencies 1

Importance

Changes 0
Metric Value
wmc 3
lcom 0
cbo 1
dl 0
loc 21
rs 10
c 0
b 0
f 0

3 Methods

Rating   Name   Duplication   Size   Complexity  
A getCommandName() 0 4 1
A getDefaultCommands() 0 6 1
A getDefinition() 0 6 1
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace AlreadyExtract\Application;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use AlreadyExtract\Command\AlreadyExtractCommand;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Symfony\Component\Console\Application as ApplicationBase;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Symfony\Component\Console\Input\InputInterface;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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class Application extends ApplicationBase

            


            
                                                                        
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    protected function getCommandName(InputInterface $input)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return 'already-extract';

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    protected function getDefaultCommands()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $defaultCommands = parent::getDefaultCommands();

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $defaultCommands[] = new AlreadyExtractCommand();

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $defaultCommands;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

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            Best Practice
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
The expression return $defaultCommands; seems to be an array, but some of its elements' types (AlreadyExtract\Command\AlreadyExtractCommand) are incompatible with the return type of the parent method Symfony\Component\Consol...ion::getDefaultCommands of type array<Symfony\Component\...le\Command\ListCommand>.
                                                                                                                                                                                                                                                                                                                

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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 new Author('Johannes');
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return '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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    public function getDefinition()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $inputDefinition = parent::getDefinition();

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $inputDefinition->setArguments();

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $inputDefinition;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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