package ledger

import (
	"regexp"
)

type Like func(Delta) bool

type likes []Like

func LikeBefore(date string) Like {
	return func(d Delta) bool {
		return date >= d.Date
	}
}

func LikeAfter(date string) Like {
	return func(d Delta) bool {
		return date <= d.Date
	}
}

func LikeName(pattern string) Like {
	return func(d Delta) bool {
		return like(pattern, d.Name)
	}
}

func like(pattern string, other string) bool {
	return regexp.MustCompile(pattern).MatchString(other)
}

func (likes likes) all(delta Delta) bool {
	for i := range likes {
		if !likes[i](delta) {
			return false
		}
	}
	return true
}