package accessctl

import (
	"errors"
)

// FilterNot wraps another Filter. If that filter matches, FilterNot does not
// match, and vice-versa.
type FilterNot struct {
	Filter FilterUnion `yaml:"filter"`
}

var _ Filter = FilterNot{}

// MatchCommit implements the method for FilterInterface.
func (f FilterNot) MatchCommit(req CommitRequest) error {
	if err := f.Filter.Filter().MatchCommit(req); errors.As(err, new(ErrFilterNoMatch)) {
		return nil
	} else if err != nil {
		return err
	}
	return ErrFilterNoMatch{Err: errors.New("sub-filter did match")}
}

// TODO FilterAll
// TODO FilterAny