API.TransitManager.ToRouteArrivalsSummaries C# (CSharp) Method

        private static List<RouteArrivalsSummary> ToRouteArrivalsSummaries(List<string> routeNames,
            Dictionary<string, List<BusArrivalTime>> stopArrivals, DateTimeOffset currentTime)
        {
            var arrivalsSummaries =
                routeNames.Select(routeName =>
                            new KeyValuePair<string, List<BusArrivalTime>>(routeName,
                                stopArrivals.ContainsKey(routeName) ? stopArrivals[routeName] : new List<BusArrivalTime>()))
                          .OrderBy(kvp => kvp.Value.DefaultIfEmpty(ARRIVAL_TIME_SEED).Min())
                          .Select(kvp => new RouteArrivalsSummary(routeName: kvp.Key,
                                routeArrivalTimes: kvp.Value, currentTime: currentTime))
                          .ToList();

            return arrivalsSummaries;
        }
    }