package common

type Perm string

const (
	PermRead  Perm = "read"
	PermWrite Perm = "write"
	PermAdmin Perm = "admin"
)

// PermRank gives perm a hierarchy for implication checks: a grant of rank N
// satisfies a request of rank <= N.
func (perm Perm) PermRank() int {
	switch perm {
	case PermAdmin:
		return 3
	case PermWrite:
		return 2
	default:
		return 1
	}
}