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Completed
Pull Request — master (#457)
by Claus
02:10
created

CViewHelper::renderStatic()   A

↳ Parent: CViewHelper

Complexity

Conditions 3
Paths 4

Size

Total Lines 16

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 3
nc 4
nop 3
dl 0
loc 16
rs 9.7333
c 0
b 0
f 0
1 
<?php
2 
namespace TYPO3Fluid\Fluid\ViewHelpers;
3 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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/*

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * This file belongs to the package "TYPO3 Fluid".

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * See LICENSE.txt that was shipped with this package.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ViewHelperNode;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use TYPO3Fluid\Fluid\Core\Variables\VariableProviderInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class CViewHelper extends AbstractViewHelper

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    protected $escapeChildren = false;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    protected $escapeOutput = false;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function initializeArguments()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('s', 'string', 'A string argument');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('i', 'int', 'An integer argument');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('f', 'float', 'A float argument');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('b', 'bool', 'A boolean argument');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('a', 'array', 'An array argument');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('dt', \DateTime::class, 'A DateTime object argument');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->registerArgument('return', 'bool', 'Return the arguments array, do not encode');

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        $data = [

            


            
                                                        
            
                                    
            
            

                
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            'string' => $arguments['s'],

            


            
                                                        
            
                                    
            
            

                
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            'int' => $arguments['i'],

            


            
                                                        
            
                                    
            
            

                
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            'float' => $arguments['f'],

            


            
                                                        
            
                                    
            
            

                
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            'bool' => $arguments['b'],

            


            
                                                        
            
                                    
            
            

                
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            'array' => $arguments['a'],

            


            
                                                        
            
                                    
            
            

                
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            'datetime' => ($arguments['dt'] instanceof \DateTime ? $arguments['dt']->format('U') : null),

            


            
                                                        
            
                                    
            
            

                
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            'child' => $renderChildrenClosure(),

            


            
                                                        
            
                                    
            
            

                
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        ];

            


            
                                                        
            
                                    
            
            

                
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        if ($arguments['return']) {

            


            
                                                        
            
                                    
            
            

                
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            return $data;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

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            Bug
            Best Practice
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
The return type of return $data; (array) is incompatible with the return type declared by the interface TYPO3Fluid\Fluid\Core\Vi...Interface::renderStatic of type string.
                                                                                                                                                                                                                                                                                                                

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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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        return json_encode($data, JSON_PRETTY_PRINT);

            


            
                                                        
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}