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Completed
Push — master ( 84d676...607d64 )
by Oscar
04:24
created

Templates::getFactories()   A

↳ Parent: Templates

Complexity

Conditions 1
Paths 1

Size

Total Lines 19
Code Lines 10

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 19
rs 9.4285
c 0
b 0
f 0
cc 1
eloc 10
nc 1
nop 0
1 
<?php
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namespace Folk\Providers;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Fol\App;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Interop\Container\ServiceProviderInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use League\Plates\Engine;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use InlineSvg\Collection;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class Templates implements ServiceProviderInterface

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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{

            


            
                                                                        
                            
            
                                    
            
            

                
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    public function getFactories()

            


            
                                                                        
                            
            
                                    
            
            

                
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    {

            


            
                                                                        
                            
            
                                    
            
            

                
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        return [

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

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            Best Practice
    
    
    
        introduced 
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The return type of return array('templates'... return $templates; }); (array<string,Closure>) is incompatible with the return type declared by the interface Interop\Container\Servic...Interface::getFactories of type callable[].
                                                                                                                                                                                                                                                                                                                

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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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            'templates' => function (App $app): Engine {

            


            
                                                                        
                            
            
                                    
            
            

                
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                $root = dirname(dirname(__DIR__));

            


            
                                                                        
                            
            
                                    
            
            

                
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                $templates = new Engine($root.'/templates');

            


            
                                                                        
                            
            
                                    
            
            

                
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                $icons = Collection::fromPath($root.'/assets/icons');

            


            
                                                                        
                            
            
                                    
            
            

                
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                $templates->addData(['app' => $app]);

            


            
                                                                        
                            
            
                                    
            
            

                
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                $templates->registerFunction('icon', function ($name) use ($icons) {

            


            
                                                                        
                            
            
                                    
            
            

                
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                    return $icons->get($name);

            


            
                                                                        
                            
            
                                    
            
            

                
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                });

            


            
                                                                        
                            
            
                                    
            
            

                
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                return $templates;

            


            
                                                                        
                            
            
                                    
            
            

                
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            }

            


            
                                                                        
                            
            
                                    
            
            

                
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        ];

            


            
                                                                        
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function getExtensions() {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return [];

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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