protected override IEnumerable <Datum> Poll(CancellationToken cancellationToken)
{
List <Datum> data = new List <Datum>();
NSError error;
HKBloodTypeObject bloodType = HealthStore.GetBloodType(out error);
if (error == null)
{
if (bloodType.BloodType == HKBloodType.ABNegative)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.ABNegative));
}
else if (bloodType.BloodType == HKBloodType.ABPositive)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.ABPositive));
}
else if (bloodType.BloodType == HKBloodType.ANegative)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.ANegative));
}
else if (bloodType.BloodType == HKBloodType.APositive)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.APositive));
}
else if (bloodType.BloodType == HKBloodType.BNegative)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.BNegative));
}
else if (bloodType.BloodType == HKBloodType.BPositive)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.BPositive));
}
else if (bloodType.BloodType == HKBloodType.ONegative)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.ONegative));
}
else if (bloodType.BloodType == HKBloodType.OPositive)
{
data.Add(new BloodTypeDatum(DateTimeOffset.Now, BloodType.OPositive));
}
else
{
throw new Exception("User has not provided -- or has not allowed access to -- their blood type.");
}
}
else
{
throw new Exception("Error reading blood type: " + error.Description);
}
return(data);
}