gistfile1.php

abstract class ChainEventAbstract implements ChainEventInterface
{
    /**
     * Define the method to be called on the way into the filter.
     *
     * @param Proem\Service\AssetManagerInterface $assets
     */
    abstract public function in(AssetManagerInterface $assets);

    /**
     * Define the method to be called on the way out of the filter.
     *
     * @param Proem\Service\AssetManagerInterface $assets
     */
    abstract public function out(AssetManagerInterface $assets);

    /**
     * Bootstrap this event.
     *
     * Executes in() then init() on the next event= in the filter chain
     * before returning to execute out().
     *
     * @param Proem\Filter\ChainManagerInterface $chainManager
     * @param array Optional extra parameters.
     */
    public function init(ChainManagerInterface $chainManager, array $params = [])
    {
        $this->in($chainManager->getAssetManager());

        if ($chainManager->getQueue()->valid()) {
            $event = $chainManager->getQueue()->next();
            if (is_object($event)) {
                $event->init($chainManager);
            }
        }

        $this->out($chainManager->getAssetManager());

        return $this;
    }
}