private BosiStatusModel CreateBosiStatusModel(ExternalSystem system, BatchHistory batch, Severity severity) { var defaultDate = DateTime.Parse("01/01/1970"); var count = EventLogger.CountLogEntriesWithStatus(system.Id, severity, batch == null ? defaultDate : batch.RunEnd); return(count > 0 ? new BosiStatusModel(system, severity, batch) { LogCount = count } : null); }