public static bool IsMixedKebabSnakeCase(this string check,
int minLength = 2,
int maxLength = 20,
bool allowNumbers = true,
RegexLetterCase allowedLetters = RegexLetterCase.LowerOnly)
{
return(CheckSymbolSeparatedCase(check, minLength, maxLength, allowNumbers, allowedLetters, '_', '-'));
}
/// <summary>
/// Checks if a string is in dot.notation.
/// Allows to set length constraints and include/exclude numbers.
/// </summary>
/// <param name="check"></param>
/// <param name="minLength"></param>
/// <param name="maxLength"></param>
/// <param name="allowNumbers"></param>
/// <returns></returns>
public static bool IsDotNotation(
this string check,
int minLength = 2,
int maxLength = 20,
bool allowNumbers = true,
RegexLetterCase allowedLetters = RegexLetterCase.LowerOnly)
{
return(CheckSymbolSeparatedCase(check, minLength, maxLength, allowNumbers, allowedLetters, '.'));
}
/// <summary>
/// Internal check for kebab and snake case.
/// </summary>
/// <param name="check"></param>
/// <param name="kebab"></param>
/// <param name="minLength"></param>
/// <param name="maxLength"></param>
/// <param name="allowNumbers"></param>
/// <returns></returns>
private static bool CheckSymbolSeparatedCase(
string check,
int minLength,
int maxLength,
bool allowNumbers,
RegexLetterCase allowedLetters,
params char[] symbols)
{
ValidateLengthInputs(minLength, maxLength);
int len = check.Length;
if (len < minLength || len > maxLength)
{
return(false);
}
string numPattern = allowNumbers ? "0-9" : String.Empty;
string letterPattern = String.Empty;
// determine which letters are allowed
switch (allowedLetters)
{
case RegexLetterCase.LowerOnly:
letterPattern = "a-z";
break;
case RegexLetterCase.CapitalOnly:
letterPattern = "A-Z";
break;
case RegexLetterCase.Both:
letterPattern = "A-Za-z";
break;
}
string pattern = String.Format("^[{2}{0}]+([{1}]{{1}}[{2}{0}]+)*$", numPattern, String.Join(String.Empty, symbols), letterPattern);
return(check.IsRegexMatch(pattern));
}