public async Task <List <WindParametersVm> > Handle(GetWindParametersQuery request,
CancellationToken cancellationToken)
{
var currentDate = _dateTimeProvider.GetUtcNow();
request.WithDefaultValues(currentDate.AddDays(-2), currentDate);
int granulation = (int)(request.Granulation ?? default);
Debug.Assert(request.From != null, "request.From != null");
var fromDate = request.From.Value;
var result = await _applicationDbContext.WeatherStationWindParameters
.AsNoTracking()
.Where(x => x.MeasurementStartTime >= request.From && x.MeasurementEndTime <= request.To)
.Select(x => new
{
TimestampGroup = granulation == (int)DateRangeGranulation.Year
? EF.Functions.DateDiffYear(fromDate, x.MeasurementEndTime)
: granulation == (int)DateRangeGranulation.Month
? EF.Functions.DateDiffMonth(fromDate, x.MeasurementEndTime)
: EF.Functions.DateDiffSecond(fromDate, x.MeasurementEndTime) / granulation,
x.AverageWindSpeed,
x.MaxWindSpeed,
x.MinWindSpeed,
x.MostFrequentWindDirection
})
.ToListAsync(cancellationToken);
//EF Core 3.1 cannot do nested grouping on DB side so we need do this in-memory ...
return(result.GroupBy(x => x.TimestampGroup)
.OrderBy(x => x.Key)
.Select(g => new WindParametersVm
{
Timestamp = DateTime.SpecifyKind(
granulation == (int)DateRangeGranulation.Year
? fromDate.AddYears(g.Key)
: granulation == (int)DateRangeGranulation.Month
? fromDate.AddMonths(g.Key)
: fromDate.AddSeconds(g.Key * granulation),
DateTimeKind.Utc),
AverageWindSpeed = Math.Round(g.Average(x => x.AverageWindSpeed), 2),
MaxWindSpeed = Math.Round(g.Max(x => x.MaxWindSpeed), 2),
MinWindSpeed = Math.Round(g.Min(x => x.MinWindSpeed), 2),
MostFrequentWindDirection = g
.GroupBy(x => x.MostFrequentWindDirection)
.Select(f => new { Direction = f.Key, Count = f.Count() })
.OrderByDescending(f => f.Count).First().Direction
})
.ToList());
}
public Task <IEnumerable <WindParametersVm> > GetWindParameters(GetWindParametersQuery query)
{
return(_apiClient.Get <GetWindParametersQuery, IEnumerable <WindParametersVm> >("WeatherData/wind", query));
}
public async Task <IActionResult> GetWindParameters([FromQuery] GetWindParametersQuery query)
{
return(Ok(await _mediator.Send(query)));
}
