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<?php |
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declare(strict_types=1); |
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namespace Churn\Event; |
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use Churn\Event\Hook\AfterAnalysisHook; |
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use Churn\Event\Hook\AfterFileAnalysisHook; |
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use Churn\Event\Hook\BeforeAnalysisHook; |
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use Churn\Event\Subscriber\AfterAnalysisHookDecorator; |
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use Churn\Event\Subscriber\AfterFileAnalysisHookDecorator; |
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use Churn\Event\Subscriber\BeforeAnalysisHookDecorator; |
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use Churn\File\FileHelper; |
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use InvalidArgumentException; |
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/** |
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* @internal |
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*/ |
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final class HookLoader |
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{ |
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/** |
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* @var array<string, string> |
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*/ |
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private $decorators; |
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/** |
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* @var string |
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*/ |
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private $basePath; |
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/** |
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* @param string $basePath The base path for the hooks files. |
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*/ |
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public function __construct(string $basePath) |
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{ |
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$this->decorators = [ |
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AfterAnalysisHookDecorator::class => AfterAnalysisHook::class, |
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AfterFileAnalysisHookDecorator::class => AfterFileAnalysisHook::class, |
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BeforeAnalysisHookDecorator::class => BeforeAnalysisHook::class, |
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]; |
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$this->basePath = $basePath; |
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} |
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/** |
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* @param array<string> $hooks The list of hooks to attach. |
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* @param Broker $broker The event broker. |
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* @throws InvalidArgumentException If a hook is invalid. |
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*/ |
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public function attachHooks(array $hooks, Broker $broker): void |
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{ |
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if ([] === $hooks) { |
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return; |
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} |
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foreach ($hooks as $hook) { |
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if (!$this->attach($hook, $broker)) { |
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throw new InvalidArgumentException('Invalid hook: ' . $hook); |
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} |
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} |
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} |
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/** |
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* @param string $hookPath The class name or the file path of the hook. |
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* @param Broker $broker The event broker. |
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*/ |
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public function attach(string $hookPath, Broker $broker): bool |
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{ |
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$foundSubscriber = false; |
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$subscribers = []; |
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foreach ($this->loadHooks($hookPath) as $hookName) { |
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$subscribers = \array_merge($subscribers, $this->hookToSubscribers($hookName)); |
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} |
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foreach ($subscribers as $subscriber) { |
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$broker->subscribe($subscriber); |
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$foundSubscriber = true; |
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} |
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return $foundSubscriber; |
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} |
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/** |
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* @param string $hookPath The class name or the file path of the hook. |
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* @return array<mixed> |
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*/ |
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private function loadHooks(string $hookPath): array |
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{ |
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if (\class_exists($hookPath)) { |
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return [$hookPath]; |
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} |
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$hookPath = FileHelper::toAbsolutePath($hookPath, $this->basePath); |
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if (!\is_file($hookPath)) { |
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return []; |
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} |
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$numberOfClasses = \count(\get_declared_classes()); |
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\Churn\Event\includeOnce($hookPath); |
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return \array_slice(\get_declared_classes(), $numberOfClasses); |
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} |
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/** |
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* @param string $hookName The class name of the hook. |
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* @return array<mixed> |
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*/ |
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private function hookToSubscribers(string $hookName): array |
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{ |
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$subscribers = []; |
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foreach ($this->decorators as $decorator => $hook) { |
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if (!\is_subclass_of($hookName, $hook)) { |
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continue; |
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} |
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$subscribers[] = new $decorator($hookName); |
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} |
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return $subscribers; |
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} |
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} |
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/** |
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* Scope isolated include. |
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* |
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* Prevents access to $this/self from included files. |
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* |
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* @param string $file The PHP file to include. |
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*/ |
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function includeOnce(string $file): void |
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{ |
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include_once $file; |
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} |
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bmitch /
churn-php
