public static void SetSpecialChars(this RandomString str, char[] specialChars)
{
var pattern = @"!@#$%^&*(),.?""'`:;\\\/{}|<>=\-+~_\[\]¬¦".ToCharArray();
if (specialChars.Any(c => !pattern.Contains(c)))
{
throw new Exception($"The special character array contains a non special character '{ string.Join(",", specialChars)}'");
}
str._specialChars = specialChars;
}
private static void randomize(this RandomString str)
{
str._buff = new char[str._size];
for (var iterate = 0; iterate < str._size; iterate++)
{
var i = str.RandomNumber(1, 100);
str.rngChar((i <= 25 ? AlphanumericFormat.Numeric : i <= 55 ? AlphanumericFormat.Uppercase : i <= 85 ? AlphanumericFormat.Lowercase : AlphanumericFormat.NonAlphanumeric), iterate);
}
str.ensureAllChars();
str._isRandomized = true;
}
private static int getUnusedPosition(this RandomString str, AlphanumericFormat format)
{
do
{
var i = str.RandomNumber(0, str._size);
if (str.checkPositions(i))
{
return(i);
}
} while (true);
}
private static void ensureAllChars(this RandomString str)
{
var length = str._positions.Count;
for (var i = 0; i < length; i++)
{
var posKvp = str._positions.ElementAt(i);
if (posKvp.Value == null)
{
str.rngChar(posKvp.Key, str.getUnusedPosition(posKvp.Key));
}
}
}
public static void UpdateFormat(this RandomString str, AlphanumericFormat format, bool included)
{
var has = str._positions.ContainsKey(format);
if (included && !has)
{
str._positions.Add(format, 0);
}
if (!included && has)
{
str._positions.Remove(format);
}
str.handleSize();
}
private static void generateChar(this RandomString str, AlphanumericFormat format, int position, int byteBuffer)
{
if (format != AlphanumericFormat.NonAlphanumeric)
{
str._buff[position] = (char)(format + byteBuffer);
}
else
{
str._buff[position] = str._specialChars[byteBuffer];
}
str._positions[format] = position;
}
private static void rngChar(this RandomString str, AlphanumericFormat format, int position)
{
var byteBuffer = 0;
switch (format)
{
case AlphanumericFormat.Numeric:
byteBuffer = str.RandomNumber(0, 9);
break;
case AlphanumericFormat.Lowercase:
case AlphanumericFormat.Uppercase:
byteBuffer = str.RandomNumber(0, 26);
break;
default:
byteBuffer = str.RandomNumber(0, str._specialChars.Length);
break;
}
str.generateChar(format, position, byteBuffer);
}
private static bool checkPositions(this RandomString str, int position)
{
return(str._positions.All(p => p.Value != position));
}