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Completed
Push — master ( ebcbe7...06aa7a )
by Ryosuke
04:11
created

TypeUtils   A

↳ Parent: Project

Complexity

Total Complexity 5

Size/Duplication

Total Lines 33
Duplicated Lines 0 %

Coupling/Cohesion

Components 0
Dependencies 0

Test Coverage

Coverage 100%

Importance

Changes 1
Bugs 0 Features 0
Metric Value
wmc 5
c 1
b 0
f 0
lcom 0
cbo 0
dl 0
loc 33
ccs 10
cts 10
cp 1
rs 10

3 Methods

Rating   Name   Duplication   Size   Complexity  
A isCurl() 0 4 2
A isGeneratorContainer() 0 4 1
A isGeneratorClosure() 0 5 2
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace mpyw\Co\Internal;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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class TypeUtils

            


            
                                                                        
                            
            
                                    
            
            

                
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{

            


            
                                                                        
                            
            
                                    
            
            

                
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    /**

            


            
                                                                        
                            
            
                                    
            
            

                
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     * Check if value is a valid cURL handle.

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @param  mixed $value

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @return bool

            


            
                                                                        
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public static function isCurl($value)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return is_resource($value) && get_resource_type($value) === 'curl';

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    /**

            


            
                                                                        
                            
            
                                    
            
            

                
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     * Check if value is a valid Generator.

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @param  mixed $value

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @return bool

            


            
                                                                        
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public static function isGeneratorContainer($value)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $value instanceof GeneratorContainer;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    /**

            


            
                                                                        
                            
            
                                    
            
            

                
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     * Check if value is a valid Generator closure.

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @param  mixed $value

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @return bool

            


            
                                                                        
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public static function isGeneratorClosure($value)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $value instanceof \Closure

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            && (new \ReflectionFunction($value))->isGenerator();

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
1 ignored issue

                            –
                            show
                        


                        

                                                                                        




    

        
            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
It seems like you code against a specific sub-type and not the parent class ReflectionFunction as the method isGenerator() does only exist in the following sub-classes of ReflectionFunction: Go\ParserReflection\ReflectionFunction. Maybe you want to instanceof check for one of these explicitly?
                                                                                                                                                                                                                                                            

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s take a look at an example:


abstract class User
{
    /** @return string */
    abstract public function getPassword();
}

class MyUser extends 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 sub-classes
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 parent class:
    

    abstract class User
{
    /** @return string */
    abstract public function getPassword();

    /** @return string */
    abstract public function getDisplayName();
}

    

    

    2. 



                        

                                                    

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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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