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<?php |
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|
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declare(strict_types=1); |
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|
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namespace Http\Client\Common; |
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|
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use Http\Client\Common\Exception\LoopException; |
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use Http\Promise\Promise; |
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use Psr\Http\Message\RequestInterface; |
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|
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final class PluginChain |
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{ |
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/** @var Plugin[] */ |
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private $plugins; |
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|
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/** @var callable(RequestInterface): Promise */ |
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private $clientCallable; |
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|
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/** @var int */ |
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private $maxRestarts; |
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|
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/** @var int */ |
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private $restarts = 0; |
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|
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/** |
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* @param Plugin[] $plugins A plugin chain |
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* @param callable(RequestInterface): Promise $clientCallable Callable making the HTTP call |
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* @param array{'max_restarts'?: int} $options |
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*/ |
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public function __construct(array $plugins, callable $clientCallable, array $options = []) |
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{ |
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$this->plugins = $plugins; |
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$this->clientCallable = $clientCallable; |
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$this->maxRestarts = (int) ($options['max_restarts'] ?? 0); |
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} |
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|
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private function createChain(): callable |
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{ |
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$lastCallable = $this->clientCallable; |
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$reversedPlugins = \array_reverse($this->plugins); |
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|
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foreach ($reversedPlugins as $plugin) { |
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$lastCallable = function (RequestInterface $request) use ($plugin, $lastCallable) { |
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return $plugin->handleRequest($request, $lastCallable, $this); |
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}; |
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} |
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|
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return $lastCallable; |
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} |
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|
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public function __invoke(RequestInterface $request): Promise |
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{ |
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if ($this->restarts > $this->maxRestarts) { |
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throw new LoopException('Too many restarts in plugin client', $request); |
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} |
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|
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++$this->restarts; |
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|
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return $this->createChain()($request); |
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} |
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} |
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