public bool MoveNext()
{
var span = _sourceStringSegment;
// Empty string
if (span.Length == 0)
{
return(false);
}
// Look for bot command prefix index (typically '!')
var commandIndex = span.IndexOf(_botPrefix);
// No command in there
if (commandIndex == -1)
{
return(false);
}
// Skip the first part of the message and the bot prefix char
span = span.Slice(commandIndex + 1);
// Find the end of the command word
var endWordIndex = 0;
while (endWordIndex < span.Length && char.IsLetterOrDigit(span[endWordIndex]))
{
++endWordIndex;
}
// Null command or just an isolated prefix char, recurse to look for next command
if (endWordIndex == 0)
{
_sourceStringSegment = span;
return(MoveNext());
}
if (endWordIndex == span.Length)
{
Current = new BotCommandItem(span);
_sourceStringSegment = ReadOnlySpan <char> .Empty;
return(true);
}
Current = new BotCommandItem(span.Slice(0, endWordIndex));
_sourceStringSegment = span.Slice(endWordIndex + 1);
return(true);
}
public BotCommandEnumerator(ReadOnlySpan <char> sourceString, char botPrefix)
{
_sourceStringSegment = sourceString;
_botPrefix = botPrefix;
Current = default;
}
