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Completed
Push — refactor-04-parser-tests ( dc4950...bd4663 )
by John
06:06
created

FieldParserDateOffset::getDateTime()   A

↳ Parent: FieldParserDateOffset

Complexity

Conditions 1
Paths 1

Size

Total Lines 11
Code Lines 6

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 6
CRAP Score 1

Importance

Changes 0
Metric Value
dl 0
loc 11
ccs 6
cts 6
cp 1
rs 9.4285
c 0
b 0
f 0
cc 1
eloc 6
nc 1
nop 0
crap 1
1 
<?php
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namespace Graze\CiffRenderer\Parser\FieldParser;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Graze\CiffRenderer\Parser\FieldParser\AbstractFieldParserDate;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Graze\CiffRenderer\Parser\FieldParser\FieldParserInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class FieldParserDateOffset extends AbstractFieldParserDate implements FieldParserInterface

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @return \DateTimeInterface

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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     */

            


            
                                                        
            
                                    
            
            

                
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    protected function getDateTime()

            


            
                                                        
            
                                    
            
            

                
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    {

            


            
                                                        
            
                                    
            
            

                
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        $offsetFieldName = (string) $this->xmlField->Data->Object->OffsetDate['SrcOffset'];

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

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            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
Accessing Data on the interface Graze\CiffRenderer\Parse...mpleXmlElementInterface suggest that you code against a concrete implementation. How about adding an instanceof check?
                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
If you access a property on an interface, you most likely code against a
concrete implementation of the interface.




Available Fixes


  1. Adding an additional type check:
    

    interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeInterface $object) {
    if ($object instanceof SomeClass) {
        $a = $object->a;
    }
}

    

    

    2. 

  2. Changing the type hint:
    

    interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeClass $object) {
    $a = $object->a;
}

    

    

    3. 



                        

                                                    

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        $offsetField = $this->xmlHeader->xpath('//DateOffset[@Name="'. $offsetFieldName .'"]')[0];

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
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            Bug
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
It seems like you code against a concrete implementation and not the interface Graze\CiffRenderer\Parse...mpleXmlElementInterface as the method xpath() does only exist in the following implementations of said interface: Graze\CiffRenderer\Parse...lement\SimpleXmlElement.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
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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        // currenty only supports offset days

            


            
                                                        
            
                                    
            
            

                
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        $offsetDays = (string) $offsetField->DefaultOffset->Day; // @codingStandardsIgnoreLine

            


            
                                                        
            
                                    
            
            

                
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        $dateInterval = new \DateInterval('P' . $offsetDays . 'D');

            


            
                                                        
            
                                    
            
            

                
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        return $this->dateTimeNow->add($dateInterval);

            


            
                                                        
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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