package util

// TruncateString returns at most max characters from the start of s. It counts
// characters rather than bytes, so a multi-byte character is never cut in half
// and the result is always valid text. A max of zero or less returns an empty
// string, and a string already at or below the limit is returned unchanged.
func TruncateString(s string, max int) string {
	if max <= 0 {
		return ""
	}

	count := 0
	for offset := range s {
		if count == max {
			return s[:offset]
		}
		count++
	}

	return s
}