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Completed
Pull Request — master (#13)
by Jérémy
04:00 queued 02:10
created

WaterfallTrait::callOnce()   A

↳ Parent: WaterfallTrait

Complexity

Conditions 2
Paths 1

Size

Total Lines 8
Code Lines 5

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
c 0
b 0
f 0
dl 0
loc 8
rs 9.4285
cc 2
eloc 5
nc 1
nop 1
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace CapMousse\ReactRestify\Traits;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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trait WaterfallTrait

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * Call callback one

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param  \Closure $fn 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @return \Closure

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     */

            


            
                                                                        
                            
            
                                    
            
            

                
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    private function callOnce ($fn) 

            


            
                                                                        
                            
            
                                    
            
            

                
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    {

            


            
                                                                        
                            
            
                                    
            
            

                
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        return function (...$args) use ($fn) {

            


            
                                                                        
                            
            
                                    
            
            

                
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            if ($fn === null) return;

            


            
                                                                        
                            
            
                                    
            
            

                
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            $fn(...$args);

            


            
                                                                        
                            
            
                                    
            
            

                
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            $fn = null;

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
1 ignored issue

                            –
                            show
                        


                        

                                                                                        




    

        
            Unused Code
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
$fn is not used, you could remove the assignment.
                                                                                                

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
This check looks for variable assignements that are either overwritten by other
assignments or where the variable is not used subsequently.


$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}





Both the $myVar assignment in line 1 and the $higher assignment in line 2
are dead. The first because $myVar is never used and the second because
$higher is always overwritten for every possible time line.


                        

                                                    

                     Loading history...
                

                    


    




                                                                                    


                    		
                

            
                                                                        
                            
            
                                    
            
            

                
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        };

            


            
                                                                        
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * Run tasks in series

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param  \Closure[]  $tasks 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param  array       $args

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @return void

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    private function waterfall (array $tasks, array $args)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $index = 0;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $next = function () use (&$index, &$tasks, &$next, &$args) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            if ($index == count($tasks)) { 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                return;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            $callback = $this->callOnce(function () use (&$next) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                $next();

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            });

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            $tasks[$index++]($callback, ...$args);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        };

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $next();

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}