class Rule {
  static final String rulesName = 'rules';
  static final String RULE_ADJUSTMENT_BASED_ON_SELECTED_FIELD_VALUE = "adjustment-based-on-selected-field-value";
  static final String RULE_SELECT_LIMIT_IF_FIELD_EQUALS_TO = "select-limit-if-field-equals-to";
  static final String RULE_DISABLED_IF_FIELD_EQUALS_TO = "disabled-if-field-equals-to";
  static final String RULE_EXCLUSIVE_SELECTION = "exclusive-selection";
  static final String RULE_MAX_QTY_LIMIT = "max-qty-limit";
  static final String RULE_ACTUAL_QTY_IS = "actual-quantity-is";

  static final String RULE_KEY_FORCE_LIMITED = 'force_limited';
  static final String RULE_KEY_FIELD_KEY = 'field-key';

  static dynamic getRule(Map<String, dynamic> json, String ruleName) {
    if (json != null && json.containsKey(rulesName)) {
      if ((json[rulesName] as Map).containsKey(ruleName)) {
        if (json[rulesName][ruleName] is bool) {
          return {ruleName: true};
        } else if (json[rulesName][ruleName] is int) {
          return {ruleName: json[rulesName][ruleName]};
        }
        return json[rulesName][ruleName];
      }
    }
    return null;
  }
}