Add Schedule class

includes/Schedule.php

+<?php
+
+namespace RRZE\Cache;
+
+defined('ABSPATH') || exit;
+
+class Schedule
+{
+    public function __construct()
+    {
+        //
+    }
+
+    public function onLoaded()
+    {
+        add_action('wp', [$this, 'activateScheduledEvents']);
+        add_filter('cron_schedules', [$this, 'customCronSchedules']);
+        add_action('rrze_cache_every10minutes_event', [$this, 'every10MinutesEvent']);
+    }
+
+    /**
+     * customCronSchedules
+     * Add custom cron schedules.
+     * @param array $schedules Available cron schedules
+     * @return array New cron schedules
+     */
+    public function customCronSchedules(array $schedules): array
+    {
+        $schedules['rrze_cache_every10minutes'] = [
+            'interval' => 2 * MINUTE_IN_SECONDS,
+            'display' => __('Every 10 minutes', 'rrze-cache')
+        ];
+        return $schedules;
+    }
+
+    /**
+     * activateScheduledEvents
+     * Activate all scheduled events.
+     * @return void
+     */
+    public function activateScheduledEvents()
+    {
+        if (!wp_next_scheduled('rrze_cache_every10minutes_event')) {
+            wp_schedule_event(time(), 'rrze_cache_every10minutes', 'rrze_cache_every10minutes_event');
+        }
+    }
+
+    /**
+     * every10MinutesEvent
+     * Run the event every 10 minutes.
+     * @return void
+     */
+    public function every10MinutesEvent()
+    {
+        File::removeDir(File::getCacheOldDir(), true, 10000);
+    }
+
+}