preExecute method

@protected Future<bool> preExecute(NodeSpec action, ActionContext context)

An initial run of validations before executing an Action. E.g.: a confirmation message like "Are you sure you want to delete this record?".

Implementation

@protected
Future<bool> preExecute(NodeSpec action, ActionContext context) async {
  final props = action.props;
  final evaluatorContext = getEvaluatorContext(
      context.actionValue, context.state, context.actionContext);
  properties.evaluateMap(props, evaluatorContext);

  if (props["executeCondition"] != null &&
      !properties.evaluateCondition(props["executeCondition"])) {
    log.warningWithContext(
        "Execute condition not met for Action '${action.type}' (${action.id}).",
        props["executeCondition"]);
    return false;
  }

  if (props["confirmation"] is Map) {
    final confirmSpec = props["confirmation"] as Map;
    return await widgets.showConfirmation(
      title: confirmSpec["title"],
      message: confirmSpec["message"],
      props: confirmSpec,
    );
  }

  log.infoWithContext(
      "Executing Action '${action.type}' (${action.id})",
      {}
        ..addAll({"action": props})
        ..addAll(evaluatorContext));
  return true;
}