public static string ToSnakeCase(string s)
{
if (string.IsNullOrEmpty(s))
{
return(s);
}
StringBuilder stringBuilder = new StringBuilder();
StringUtils.SnakeCaseState snakeCaseState = StringUtils.SnakeCaseState.Start;
for (int i = 0; i < s.Length; i++)
{
if (s[i] == ' ')
{
if (snakeCaseState != StringUtils.SnakeCaseState.Start)
{
snakeCaseState = StringUtils.SnakeCaseState.NewWord;
}
}
else if (char.IsUpper(s[i]))
{
switch (snakeCaseState)
{
case StringUtils.SnakeCaseState.Lower:
case StringUtils.SnakeCaseState.NewWord:
{
stringBuilder.Append('\u005F');
break;
}
case StringUtils.SnakeCaseState.Upper:
{
if (!(i > 0 & i + 1 < s.Length))
{
break;
}
char chr = s[i + 1];
if (char.IsUpper(chr) || chr == '\u005F')
{
break;
}
stringBuilder.Append('\u005F');
break;
}
}
char lower = char.ToLower(s[i], CultureInfo.InvariantCulture);
stringBuilder.Append(lower);
snakeCaseState = StringUtils.SnakeCaseState.Upper;
}
else if (s[i] != '\u005F')
{
if (snakeCaseState == StringUtils.SnakeCaseState.NewWord)
{
stringBuilder.Append('\u005F');
}
stringBuilder.Append(s[i]);
snakeCaseState = StringUtils.SnakeCaseState.Lower;
}
else
{
stringBuilder.Append('\u005F');
snakeCaseState = StringUtils.SnakeCaseState.Start;
}
}
return(stringBuilder.ToString());
}
public static string ToSnakeCase(string s)
{
if (string.IsNullOrEmpty(s))
{
return(s);
}
StringBuilder stringBuilder = new StringBuilder();
StringUtils.SnakeCaseState snakeCaseState = StringUtils.SnakeCaseState.Start;
for (int index = 0; index < s.Length; ++index)
{
if (s[index] == ' ')
{
if (snakeCaseState != StringUtils.SnakeCaseState.Start)
{
snakeCaseState = StringUtils.SnakeCaseState.NewWord;
}
}
else if (char.IsUpper(s[index]))
{
switch (snakeCaseState)
{
case StringUtils.SnakeCaseState.Lower:
case StringUtils.SnakeCaseState.NewWord:
stringBuilder.Append('_');
break;
case StringUtils.SnakeCaseState.Upper:
bool flag = index + 1 < s.Length;
if (index > 0 & flag)
{
char c = s[index + 1];
if (!char.IsUpper(c) && c != '_')
{
stringBuilder.Append('_');
break;
}
break;
}
break;
}
char lower = char.ToLower(s[index], CultureInfo.InvariantCulture);
stringBuilder.Append(lower);
snakeCaseState = StringUtils.SnakeCaseState.Upper;
}
else if (s[index] == '_')
{
stringBuilder.Append('_');
snakeCaseState = StringUtils.SnakeCaseState.Start;
}
else
{
if (snakeCaseState == StringUtils.SnakeCaseState.NewWord)
{
stringBuilder.Append('_');
}
stringBuilder.Append(s[index]);
snakeCaseState = StringUtils.SnakeCaseState.Lower;
}
}
return(stringBuilder.ToString());
}
