package meshmoduleassignerclient

import (
	"fmt"
	"regexp"
)

var proposalIDOK = regexp.MustCompile(`^[a-z0-9][a-z0-9-]{2,62}$`)

// CheckProposalID refuses an id that is no proposal's: lower-case letters, digits and dashes, 3 to 63 of them, so it is one
// key token. The holder writes proposals under it, and the keys of the asks about a proposal (`placement.<id>`) carry it.
func CheckProposalID(id string) error {
	if !proposalIDOK.MatchString(id) {
		return fmt.Errorf("mesh-module-assigner: %q is no proposal id (lower-case letters, digits and dashes, one key token)", id)
	}
	return nil
}