package allowlist

import "fmt"

type Allowlist struct {
	owners map[string]struct{}
}

func New(owners []string) *Allowlist {
	m := make(map[string]struct{}, len(owners))
	for _, o := range owners {
		m[o] = struct{}{}
	}
	return &Allowlist{owners: m}
}

func (a *Allowlist) Check(owner string) error {
	if owner == "" {
		return fmt.Errorf("owner required")
	}
	if _, ok := a.owners[owner]; !ok {
		return fmt.Errorf("owner %q not in allowlist", owner)
	}
	return nil
}