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PaginateProcessor::process()   A

↳ Parent: PaginateProcessor

Complexity

Conditions 1
Paths 1

Size

Total Lines 7
Code Lines 4

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 4
CRAP Score 1

Importance

Changes 2
Bugs 1 Features 0
Metric Value
c 2
b 1
f 0
dl 0
loc 7
ccs 4
cts 4
cp 1
rs 9.4285
cc 1
eloc 4
nc 1
nop 2
crap 1
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace ViewComponents\Eloquent\Processor;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Illuminate\Database\Eloquent\Builder as EloquentBuilder;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Illuminate\Database\Query\Builder;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use ViewComponents\ViewComponents\Data\Operation\OperationInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use ViewComponents\ViewComponents\Data\Operation\PaginateOperation;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use ViewComponents\ViewComponents\Data\Processor\AbstractPaginateProcessor;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class PaginateProcessor extends AbstractPaginateProcessor

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param Builder|EloquentBuilder $src

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param OperationInterface|PaginateOperation $operation

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @return mixed

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     */

            


            
                                                        
            
                                    
            
            

                
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    public function process($src, OperationInterface $operation)

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        $src->limit($operation->getPageSize())

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                                                                        
                        

                            
                            
0 ignored issues

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                            show
                        


                        

                                                                                        




    

        
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        introduced 
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It seems like you code against a concrete implementation and not the interface ViewComponents\ViewCompo...tion\OperationInterface as the method getPageSize() does only exist in the following implementations of said interface: ViewComponents\ViewCompo...ation\PaginateOperation.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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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            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
The method limit does only exist in Illuminate\Database\Query\Builder, but not in Illuminate\Database\Eloquent\Builder.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
It seems like the method you are trying to call exists only in some of the
possible types.


Let’s take a look at an example:


class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}







Available Fixes


  1. Add an additional type-check:
    

    /**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo();

    if ($x instanceof B) {
        $x->bar();
    }
}

    

    

    2. 

  2. Only allow a single type to be passed if the variable comes from a parameter:
    

    function someFunction(B $x) { /** ... */ }

    

    

    3. 



                        

                                                    

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            ->offset($this->getOffset($operation));

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

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                            show
                        


                        

                                                                                        




    

        
            Compatibility
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
$operation of type object<ViewComponents\Vi...ion\OperationInterface> is not a sub-type of object<ViewComponents\Vi...tion\PaginateOperation>. It seems like you assume a concrete implementation of the interface ViewComponents\ViewCompo...tion\OperationInterface to be always present.
                                                                                                                                                                                                                                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
This check looks for parameters that are defined as one type in their type
hint or doc comment but seem to be used as a narrower type, i.e an
implementation of an interface or a subclass.


Consider changing the type of the parameter or doing an instanceof check before assuming
your parameter is of the expected type.


                        

                                                    

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        return $src;

            


            
                                                        
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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