Events can have the following statuses:

• New: the event is newly created, its notifications are not yet scheduled, this status should not remain longer than a short moment. The event is considered not active and not scheduled in this status
• Scheduled: notifications are scheduled. The event is considered active and scheduled in this status
• Running: the first notification was sent successfully, further notification(s) are scheduled. The event is considered active and scheduled in this status
• Completed: all notifications were handled and sent successfully. The event is considered not active (anymore) and not scheduled (anymore) in this status. The event cannot be edited anymore
• Failed: all notifications were handled, but some failed execution. There should be status messages indicating the exact failures, such as: "problem sending e-mail". The event is considered not active (anymore) and not scheduled (anymore) in this status. The event cannot be edited anymore
• User paused: not currently implemented. The event is considered active and not scheduled in this status
• Waiting for user: not currently implemented. The event is considered active and not scheduled in this status
• User aborted: not currently implemented. The event is considered not active and not scheduled in this status. The event cannot be edited anymore