vendor/florianv/exchanger/src/Service/Chain.php line 53

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  1. <?php
  3. declare(strict_types=1);
  5. /*
  6.  * This file is part of Exchanger.
  7.  *
  8.  * (c) Florian Voutzinos <florian@voutzinos.com>
  9.  *
  10.  * For the full copyright and license information, please view the LICENSE
  11.  * file that was distributed with this source code.
  12.  */
  14. namespace Exchanger\Service;
  16. use Exchanger\Contract\ExchangeRate;
  17. use Exchanger\Contract\ExchangeRateQuery;
  18. use Exchanger\Contract\ExchangeRateService;
  19. use Exchanger\Exception\ChainException;
  21. /**
  22.  * A service using other services in a chain.
  23.  *
  24.  * @author Florian Voutzinos <florian@voutzinos.com>
  25.  */
  26. final class Chain implements ExchangeRateService
  27. {
  28.     /**
  29.      * The services.
  30.      *
  31.      * @var array|ExchangeRateService[]
  32.      */
  33.     private $services;
  35.     /**
  36.      * Creates a new chain service.
  37.      *
  38.      * @param ExchangeRateService[] $services
  39.      */
  40.     public function __construct(iterable $services = [])
  41.     {
  42.         if (!\is_array($services)) {
  43.             /** @var \Iterator $services */
  44.             $services = iterator_to_array($services);
  45.         }
  47.         $this->services = $services;
  48.     }
  50.     /**
  51.      * {@inheritdoc}
  52.      */
  53.     public function getExchangeRate(ExchangeRateQuery $exchangeQuery): ExchangeRate
  54.     {
  55.         $exceptions = [];
  57.         foreach ($this->services as $service) {
  58.             if (!$service->supportQuery($exchangeQuery)) {
  59.                 continue;
  60.             }
  62.             try {
  63.                 return $service->getExchangeRate($exchangeQuery);
  64.             } catch (\Throwable $e) {
  65.                 $exceptions[] = $e;
  66.             }
  67.         }
  69.         throw new ChainException($exceptions);
  70.     }
  72.     /**
  73.      * {@inheritdoc}
  74.      */
  75.     public function supportQuery(ExchangeRateQuery $exchangeQuery): bool
  76.     {
  77.         foreach ($this->services as $service) {
  78.             if ($service->supportQuery($exchangeQuery)) {
  79.                 return true;
  80.             }
  81.         }
  83.         return false;
  84.     }
  86.     /**
  87.      * {@inheritdoc}
  88.      */
  89.     public function getName(): string
  90.     {
  91.         return 'chain';
  92.     }
  93. }