public static string CreditCardNumber(Bogus.DataSets.CardType provider) => Finance.CreditCardNumber(provider);
/// <summary>
/// Generate a random credit card number with valid Luhn checksum.
/// </summary>
/// <param name="provider">The type of credit card to generate (ie: American Express, Discover, etc.). Passing null, a random card provider will be chosen.</param>
public string CreditCardNumber(CardType provider = null)
{
if (provider is null)
{
provider = this.Random.ListItem(CardType.All);
}
var format = GetRandomArrayItem($"credit_card.{provider.Value}");
var symbol = '#';
var expandedFormat = RegexStyleStringParse(format); // replace [4-9] with a random number in range etc...
var cardNumber = this.Random.ReplaceNumbers(expandedFormat, symbol); // replace ### with random numbers
var numberList = cardNumber.Where(char.IsDigit)
.Select(c => int.Parse(c.ToString())).ToList();
var checkNum = numberList.CheckDigit();
return(cardNumber.Replace("L", checkNum.ToString()));
string RegexStyleStringParse(string str = "")
{
// Deal with range repeat `{min,max}`
var RANGE_REP_REG = new Regex(@"(.)\{(\d+)\,(\d+)\}");
var REP_REG = new Regex(@"(.)\{(\d+)\}");
var RANGE_REG = new Regex(@"\[(\d+)\-(\d+)\]");
int min, max, tmp, repetitions;
var token = RANGE_REP_REG.Match(str);
while (token.Success)
{
min = Int32.Parse(token.Groups[2].Value);
max = Int32.Parse(token.Groups[3].Value);
if (min > max)
{
tmp = max;
max = min;
min = tmp;
}
repetitions = this.Random.Number(min, max);
str = str.Substring(0, token.Index) +
new string(token.Groups[1].Value[0], repetitions) +
str.Substring(token.Index + token.Groups[0].Length);
token = RANGE_REP_REG.Match(str);
}
// Deal with repeat `{num}`
token = REP_REG.Match(str);
while (token.Success)
{
repetitions = Int32.Parse(token.Groups[2].Value);
str = str.Substring(0, token.Index) +
new string(token.Groups[1].Value[0], repetitions) +
str.Substring(token.Index + token.Groups[0].Length);
token = REP_REG.Match(str);
}
// Deal with range `[min-max]` (only works with numbers for now)
//TODO: implement for letters e.g. [0-9a-zA-Z] etc.
token = RANGE_REG.Match(str);
while (token.Success)
{
min = Int32.Parse(token.Groups[1].Value); // This time we are not capturing the char befor `[]`
max = Int32.Parse(token.Groups[2].Value);
// switch min and max
if (min > max)
{
tmp = max;
max = min;
min = tmp;
}
str = str.Substring(0, token.Index) +
this.Random.Number(min, max) +
str.Substring(token.Index + token.Groups[0].Length);
token = RANGE_REG.Match(str);
}
return(str);
}
}
