package nechotron

import "strings"

type FilterFn func(u *Update) bool

func TextStartsWith(text string) FilterFn {
	return func(u *Update) bool {
		return strings.HasPrefix(u.Text(), text)
	}
}

func TextStartsWithAny(subs ...string) FilterFn {
	return func(u *Update) bool {
		text := u.Text()
		for _, sub := range subs {
			if strings.HasPrefix(text, sub) {
				return true
			}
		}
		return false
	}
}

func TextHas(text string) FilterFn {
	return func(u *Update) bool {
		return strings.Contains(u.Text(), text)
	}
}

func TextHasAny(subs ...string) FilterFn {
	return func(u *Update) bool {
		text := u.Text()
		for _, sub := range subs {
			if strings.Contains(text, sub) {
				return true
			}
		}
		return false
	}
}