Completed
Push — master ( b9260b...b1a7da )
by Joachim
06:19
created

StaticExchangeRateCurrencyConverter   A

Complexity

Total Complexity 3

Size/Duplication

Total Lines 23
Duplicated Lines 0 %

Importance

Changes 0
Metric Value
wmc 3
eloc 6
dl 0
loc 23
rs 10
c 0
b 0
f 0

3 Methods

Rating   Name   Duplication   Size   Complexity  
A __construct() 0 3 1
A supports() 0 3 1
A convert() 0 8 1
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<?php
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declare(strict_types=1);
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namespace Setono\SyliusStockMovementPlugin\CurrencyConverter;
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use Money\Currency;
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use Money\Money;
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use Sylius\Component\Currency\Converter\CurrencyConverterInterface;
0 ignored issues
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Bug introduced by
This use statement conflicts with another class in this namespace, Setono\SyliusStockMoveme...rencyConverterInterface. Consider defining an alias.

Let?s assume that you have a directory layout like this:

.
|-- OtherDir
|   |-- Bar.php
|   `-- Foo.php
`-- SomeDir
    `-- Foo.php

and let?s assume the following content of Bar.php:

// Bar.php
namespace OtherDir;

use SomeDir\Foo; // This now conflicts the class OtherDir\Foo

If both files OtherDir/Foo.php and SomeDir/Foo.php are loaded in the same runtime, you will see a PHP error such as the following:

PHP Fatal error:  Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php

However, as OtherDir/Foo.php does not necessarily have to be loaded and the error is only triggered if it is loaded before OtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias:

// Bar.php
namespace OtherDir;

use SomeDir\Foo as SomeDirFoo; // There is no conflict anymore.
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final class StaticExchangeRateCurrencyConverter extends CurrencyConverter
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{
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    /** @var CurrencyConverterInterface */
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    private $currencyConverter;
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    public function __construct(CurrencyConverterInterface $currencyConverter)
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    {
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        $this->currencyConverter = $currencyConverter;
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    }
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    public function convert(int $amount, string $sourceCurrency, string $targetCurrency, array $conversionContext = []): Money
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    {
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        // notice that Sylius' currency converter will return the same amount if the source > target currency pair does not exist
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        // i.e. if you input EUR 100 and your target is DKK, but no exchange rate exists between EUR and DKK
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        // Sylius' currency converter will return 100 although the expected result is something like 745
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        $converted = $this->currencyConverter->convert($amount, $sourceCurrency, $targetCurrency);
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        return new Money($converted, new Currency($targetCurrency));
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    }
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    public function supports(int $amount, string $sourceCurrency, string $targetCurrency, array $conversionContext = []): bool
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    {
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        return true;
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    }
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}
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