public async ValueTask <IEnumerable <Observation> > FindObservationAsync(Guid sequenceId)
{
var sequence = await context.Sequences
.Include(s => s.Observations)
.FirstOrDefaultAsync(s => s.Id == sequenceId);
if (sequence == null)
{
Throws.SequenceNotFound();
}
return(sequence.Observations
.OrderBy(o => o.Date)
.Select(o =>
{
var trafficLight = new Light(
o.Color,
new TrafficLightDigits(o.High, o.Low));
var predictedDigits = o
.Digits
.Select(x => new TrafficLightDigits(x))
.ToArray();
return new Observation(sequenceId, trafficLight, predictedDigits);
}));
}
public async Task SaveObservationAsync(Guid sequenceId, Light trafficLight, IEnumerable <TrafficLightDigits> digits)
{
var sequence = await context.Sequences.FindAsync(sequenceId);
if (sequence == null)
{
Throws.SequenceNotFound();
}
var observation = new ObservationEntity
{
Date = DateTimeOffset.UtcNow,
Color = trafficLight.Color,
High = trafficLight.Digits.High.ToBitString(),
Low = trafficLight.Digits.Low.ToBitString(),
Digits = digits.Select(x => x.ToNumber()).ToArray()
};
sequence.Observations.Add(observation);
await context.SaveChangesAsync();
}
