// Ported from filius-ipad (GPLv2/GPLv3), ios/FiliusPad/TopologyEditor.
// Swift orders identifiers by `UUID.uuidString`, which is upper case. Every
// deterministic ordering in the runtime depends on it, so identifiers are
// compared the same way here whatever case they were written in.

/** A node, port, link or socket identifier: a UUID string. */
export type Id = string;

/** `lhs.uuidString < rhs.uuidString` in Swift. */
export function idLess(lhs: Id, rhs: Id): boolean {
  return lhs.toUpperCase() < rhs.toUpperCase();
}

/** Comparator for `Array.prototype.sort` with the Swift ordering. */
export function compareIds(lhs: Id, rhs: Id): number {
  const left = lhs.toUpperCase();
  const right = rhs.toUpperCase();
  return left < right ? -1 : left > right ? 1 : 0;
}