package caps

import (
	"encoding/json"

	"github.com/google/uuid"
)

// parseUUID parses a canonical UUID string, returning uuid.Nil for empty or
// malformed input (host-side values are always canonical; this mirrors the
// tolerant decode the render-context shim uses).
func parseUUID(s string) uuid.UUID {
	if s == "" {
		return uuid.Nil
	}
	id, err := uuid.Parse(s)
	if err != nil {
		return uuid.Nil
	}
	return id
}

// unmarshalMap decodes a JSON object into map[string]any, returning nil for
// empty or undecodable input (callers treat absent maps as nil).
func unmarshalMap(raw []byte) map[string]any {
	if len(raw) == 0 {
		return nil
	}
	var m map[string]any
	if err := json.Unmarshal(raw, &m); err != nil {
		return nil
	}
	return m
}