package sensitive

// ScanText folds text, runs the matcher, and optionally masks the original body.
func ScanText(m *Matcher, text string) (matches []Match, masked string, ok bool) {
	idx := FoldAndIndex(text)
	if len(idx.Norm) == 0 || m == nil {
		return nil, text, true
	}
	matches = m.FindAll(idx.Norm)
	if len(matches) == 0 {
		return nil, text, true
	}
	intervals, ok := IntervalsFromMatches(&idx, matches)
	if !ok {
		return matches, text, false
	}
	return matches, Mask(idx.OrigBytes, intervals, "***"), true
}