--- /dev/null
+<?php
+
+namespace Drupal\automated_cron\EventSubscriber;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\CronInterface;
+use Drupal\Core\State\StateInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\PostResponseEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+/**
+ * A subscriber running cron after a response is sent.
+ */
+class AutomatedCron implements EventSubscriberInterface {
+
+ /**
+ * The cron service.
+ *
+ * @var \Drupal\Core\CronInterface
+ */
+ protected $cron;
+
+ /**
+ * The cron configuration.
+ *
+ * @var \Drupal\Core\Config\Config
+ */
+ protected $config;
+
+ /**
+ * The state key value store.
+ *
+ * @var \Drupal\Core\State\StateInterface;
+ */
+ protected $state;
+
+ /**
+ * Constructs a new automated cron runner.
+ *
+ * @param \Drupal\Core\CronInterface $cron
+ * The cron service.
+ * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+ * The config factory.
+ * @param \Drupal\Core\State\StateInterface $state
+ * The state key-value store service.
+ */
+ public function __construct(CronInterface $cron, ConfigFactoryInterface $config_factory, StateInterface $state) {
+ $this->cron = $cron;
+ $this->config = $config_factory->get('automated_cron.settings');
+ $this->state = $state;
+ }
+
+ /**
+ * Run the automated cron if enabled.
+ *
+ * @param \Symfony\Component\HttpKernel\Event\PostResponseEvent $event
+ * The Event to process.
+ */
+ public function onTerminate(PostResponseEvent $event) {
+ $interval = $this->config->get('interval');
+ if ($interval > 0) {
+ $cron_next = $this->state->get('system.cron_last', 0) + $interval;
+ if ((int) $event->getRequest()->server->get('REQUEST_TIME') > $cron_next) {
+ $this->cron->run();
+ }
+ }
+ }
+
+ /**
+ * Registers the methods in this class that should be listeners.
+ *
+ * @return array
+ * An array of event listener definitions.
+ */
+ public static function getSubscribedEvents() {
+ return [KernelEvents::TERMINATE => [['onTerminate', 100]]];
+ }
+
+}