package diagram

import (
	"context"
	"fmt"

	"modelRT/common"
	"modelRT/constants"
)

func clientTokenFromContext(ctx context.Context) (string, error) {
	if ctx == nil {
		return "", common.ErrGetClientToken
	}
	token, ok := ctx.Value(constants.CtxKeyClientToken).(string)
	if !ok || token == "" {
		return "", fmt.Errorf("%w: missing or invalid context value", common.ErrGetClientToken)
	}
	return token, nil
}