public string CreateExercise(IProvideRandomNumbers randomNumberGenerator)
{
var numbers = _numberDefinitions.Select(n => n.GetNumber(randomNumberGenerator)).ToArray();
var invalidConstraintCount = 0;
while (!ConstraintsAreValid(numbers))
{
if (invalidConstraintCount > 100)
throw new CannotSatisfyConstraintException("Het is onmogelijk om getallen te maken waarvoor de regel klopt (in 100 pogingen)");
numbers = _numberDefinitions.Select(n => n.GetNumber(randomNumberGenerator)).ToArray();
invalidConstraintCount++;
}
return string.Format(
_exerciseTemplate.Template,
numbers.Select(n => (object)n).ToArray()
);
}
public decimal GetNumber(IProvideRandomNumbers randomNumberGenerator)
{
var generatedNumber = randomNumberGenerator.GetRandomNumber(MinValue, MaxValue);
return generatedNumber / (decimal)Math.Pow(10, Decimals);
}
public CreateExerciseSheetHandler(IRepository repository, IGetExerciseHandler getExerciseHandler, IProvideRandomNumbers randomNumberGenerator)
{
_repository = repository;
_getExerciseHandler = getExerciseHandler;
_randomNumberGenerator = randomNumberGenerator;
}
