private static string GenerateAlias(string input, int desiredLength, bool mapToAnsi, bool skipInvalidCharacter, char invalidCharacterReplacement)
{
if (string.IsNullOrEmpty(input))
{
throw new ArgumentNullException("input");
}
if (AliasHelper.Analyze(invalidCharacterReplacement) != AliasHelper.CharacterCategory.RegularCharacter)
{
throw new ArgumentOutOfRangeException("invalidCharacterReplacement", invalidCharacterReplacement, new LocalizedString("DEV BUG: Parameter 'invalidCharacterReplacement' should be category of CharacterCategory.RegularCharacter."));
}
if (mapToAnsi)
{
input = UnicodeToAnsiConverter.Convert(input, skipInvalidCharacter, invalidCharacterReplacement);
}
StringBuilder stringBuilder = new StringBuilder(input.Length);
AliasHelper.RecognisingState recognisingState = AliasHelper.RecognisingState.Start;
int num = 0;
int num2 = 0;
while (input.Length > num && desiredLength > num2)
{
char c = input[num];
AliasHelper.CharacterCategory characterCategory = AliasHelper.Analyze(c);
if (characterCategory != AliasHelper.CharacterCategory.WhiteSpaceSymbol)
{
switch (recognisingState)
{
case AliasHelper.RecognisingState.Start:
switch (characterCategory)
{
case AliasHelper.CharacterCategory.RegularCharacter:
recognisingState = AliasHelper.RecognisingState.Terminal;
break;
case AliasHelper.CharacterCategory.InvalidCharacter:
case AliasHelper.CharacterCategory.DotSymbol:
if (skipInvalidCharacter)
{
goto IL_149;
}
c = invalidCharacterReplacement;
recognisingState = AliasHelper.RecognisingState.Terminal;
break;
}
break;
case AliasHelper.RecognisingState.Terminal:
switch (characterCategory)
{
case AliasHelper.CharacterCategory.InvalidCharacter:
if (skipInvalidCharacter)
{
goto IL_149;
}
c = invalidCharacterReplacement;
break;
case AliasHelper.CharacterCategory.DotSymbol:
if (input.Length - 1 == num || desiredLength - 1 == num2)
{
if (skipInvalidCharacter)
{
goto IL_149;
}
c = invalidCharacterReplacement;
}
else
{
recognisingState = AliasHelper.RecognisingState.Middle;
}
break;
}
break;
case AliasHelper.RecognisingState.Middle:
switch (characterCategory)
{
case AliasHelper.CharacterCategory.RegularCharacter:
recognisingState = AliasHelper.RecognisingState.Terminal;
break;
case AliasHelper.CharacterCategory.InvalidCharacter:
case AliasHelper.CharacterCategory.DotSymbol:
if (skipInvalidCharacter && input.Length - 1 > num && desiredLength - 1 > num2)
{
goto IL_149;
}
c = invalidCharacterReplacement;
recognisingState = AliasHelper.RecognisingState.Terminal;
break;
}
break;
}
stringBuilder.Append(c);
num2++;
}
IL_149:
num++;
}
if (AliasHelper.RecognisingState.Terminal != recognisingState)
{
return(null);
}
return(stringBuilder.ToString());
}
public static string GenerateAlias(string input, bool skipInvalidCharacter)
{
return(AliasHelper.GenerateAlias(input, AliasHelper.MaximalAliasLength, true, skipInvalidCharacter, '?'));
}
public static string GenerateAlias(string input, char invalidCharacterReplacement)
{
return(AliasHelper.GenerateAlias(input, AliasHelper.MaximalAliasLength, true, false, invalidCharacterReplacement));
}
public static string GenerateAlias(string input)
{
return(AliasHelper.GenerateAlias(input, AliasHelper.MaximalAliasLength, true, false, '?'));
}