MDL-57888 core_calendar: moved functions from calendar/lib.php

Part of MDL-55611 epic.

lib/classes/task/calendar_cron_task.php

@@ -23,6 +23,10 @@
  */
 namespace core\task;
 
+defined('MOODLE_INTERNAL') || die();
+
+require_once($CFG->libdir . '/cronlib.php');
+
 /**
  * Simple task to run the calendar cron.
  */
@@ -42,11 +46,32 @@ class calendar_cron_task extends scheduled_task {
      * Throw exceptions on errors (the job will be retried).
      */
     public function execute() {
-        global $CFG;
+        global $CFG, $DB;
 
-        // Run calendar cron.
-        require_once("{$CFG->dirroot}/calendar/lib.php");
-        calendar_cron();
+        require_once($CFG->libdir . '/bennu/bennu.inc.php');
+
+        mtrace('Updating calendar subscriptions:');
+        cron_trace_time_and_memory();
+
+        $time = time();
+        $sql = "SELECT *
+                  FROM {event_subscriptions}
+                 WHERE pollinterval > 0
+                   AND lastupdated + pollinterval < :time";
+        $subscriptions = $DB->get_records_sql($sql, array('time' => $time));
+        foreach ($subscriptions as $sub) {
+            mtrace("Updating calendar subscription {$sub->name} in course {$sub->courseid}");
+            try {
+                $log = \core_calendar\api::update_subscription_events($sub->id);
+                mtrace(trim(strip_tags($log)));
+            } catch (\moodle_exception $ex) {
+                mtrace('Error updating calendar subscription: ' . $ex->getMessage());
+            }
+        }
+
+        mtrace('Finished updating calendar subscriptions.');
+
+        return true;
     }
 
 }