/// <summary>
/// Returns the sum of a set of delimited numbers.
/// </summary>
/// <param name="numbers">A string containing delimited numbers. This should contain one or more lines.</param>
/// <returns>The sum.</returns>
public int Add(string numbers)
{
var delimiters = _delimiterParser.Parse(numbers);
var lines = _numberLinesParser.GetLines(numbers);
var linesOfNumbers = lines.Select(line => _numbersParser.Parse(line, delimiters));
var filteredNumbers = linesOfNumbers.Select(line => _numberFilter.Filter(line));
var detectedNumbers = filteredNumbers.Select(nums => _numberDetector.Detect(nums)).SelectMany(arr => arr);
if (detectedNumbers.Any())
{
throw new InvalidNumbersException($"Invalid numbers encountered", detectedNumbers);
}
return(_numberAdder.Add(filteredNumbers));
}
