@nocobase/flow-engine/src/utils/inheritance.ts

A standalone flow engine for NocoBase, managing workflows, models, and actions.

/**
 * This file is part of the NocoBase (R) project.
 * Copyright (c) 2020-2024 NocoBase Co., Ltd.
 * Authors: NocoBase Team.
 *
 * This project is dual-licensed under AGPL-3.0 and NocoBase Commercial License.
 * For more information, please refer to: https://www.nocobase.com/agreement.
 */

import type { ModelConstructor } from '../types';

/**
 * 检查一个类是否继承自指定的父类（支持多层继承）
 * @param {ModelConstructor} childClass 要检查的子类
 * @param {ModelConstructor} parentClass 父类
 * @returns {boolean} 如果子类继承自父类则返回 true
 */
export function isInheritedFrom(childClass: ModelConstructor, parentClass: ModelConstructor): boolean {
  // 如果是同一个类，返回 false（不包括自身）
  if (childClass === parentClass) {
    return false;
  }

  // 检查直接继承
  if (childClass.prototype instanceof parentClass) {
    return true;
  }

  // 递归检查原型链
  let currentProto = Object.getPrototypeOf(childClass.prototype);
  while (currentProto && currentProto !== Object.prototype) {
    if (currentProto.constructor === parentClass) {
      return true;
    }
    currentProto = Object.getPrototypeOf(currentProto);
  }

  return false;
}