NewCheckLateArrival returns a new instance of CheckLateArrival.

NewCheckOverStays returns a new instance of CheckOverStays.

NewGetAllAlerts returns a new instance of GetAllAlerts.

NewGetSingleAlert returns a new instance of GetSingleAlert.

CheckLateArrival provides business logic to check when an arrival notification hasn't been received within a given threshold from the parking request start time.

GetAllAlerts provides business logic to get all alerts.

GetSingleAlert provides business logic to get a single alert.