API.TransitManager.InterleaveRouteScheduleAndEstimates C# (CSharp) Method

        private static List<BusArrivalTime> InterleaveRouteScheduleAndEstimates(BusStopRouteSchedule routeSchedule,
            Dictionary<string, List<int>> stopEstimates, DateTimeOffset currentTime)
        {
            var arrivalTimes = Enumerable.Empty<BusArrivalTime>();

            var daySchedule = routeSchedule.DaySchedules.FirstOrDefault(ds => DaysOfWeekUtils.IsToday(ds.Days, currentTime));
            if (daySchedule != null)
            {
                var relativeSchedule = MakeRelativeScheduleWithinCutoff(daySchedule, currentTime);
                arrivalTimes = relativeSchedule.Select(minutes => new BusArrivalTime(minutes, isEstimate: false));
            }
            
            if (stopEstimates.ContainsKey(routeSchedule.RouteNo))
            {
                var routeEstimates = stopEstimates[routeSchedule.RouteNo];
                arrivalTimes = arrivalTimes.Where(arrivalTime =>
                        !routeEstimates.Any(estimate =>
                            Math.Abs(arrivalTime.MinutesFromNow - estimate) <= ESTIMATE_CORRELATION_TOLERANCE_MINUTES));
                arrivalTimes = arrivalTimes.Concat(
                    routeEstimates.Select(estimate => new BusArrivalTime(estimate, isEstimate: true)));
            }

            arrivalTimes = arrivalTimes.OrderBy(arrivalTime => arrivalTime);

            return arrivalTimes.ToList();
        }