package bufr

import "git.milar.in/milarin/ds"

type RuneFunc = func(rn rune) bool

func IsNewLine(rn rune) bool {
	return rn == '\n'
}

func IsSpace(rn rune) bool {
	return rn == ' '
}

func IsTab(rn rune) bool {
	return rn == '\t'
}

func IsWhitespace(rn rune) bool {
	return IsSpace(rn) || IsTab(rn) || IsNewLine(rn)
}

func And(f ...RuneFunc) RuneFunc {
	return func(rn rune) bool {
		return findFirstFalse(rn, f)
	}
}

func Or(f ...RuneFunc) RuneFunc {
	return func(rn rune) bool {
		return findFirstTrue(rn, f)
	}
}

func Not(f RuneFunc) RuneFunc {
	return func(rn rune) bool {
		return !f(rn)
	}
}

func Is(rn rune) RuneFunc {
	return func(r rune) bool {
		return rn == r
	}
}

func OneOf(runes string) RuneFunc {
	m := ds.NewSet[rune]()
	for _, rn := range runes {
		m.Add(rn)
	}

	return func(r rune) bool {
		return m.Has(r)
	}
}