using System.Text.RegularExpressions;

namespace WindowsFormsApp1.Services.RegexAnalyse
{
    class RegexAnalyseService : IRegexAnalyseService
    {
        public string OnlyPositiveDigitNumbers(string number)
        {
            string pattern = @"^[0-9]([.,][0-9]{1,3})?$";
            //string pattern = @"^[1-9]\d{0,4}$";

            var regex = new Regex(pattern);

            bool match = regex.IsMatch(number);

            if (!match && !string.IsNullOrEmpty(number))
            {
                number = number.Remove(number.Length - 1);
            }

            return number;
        }
    }
}