Clean Architecture是什么？怎么用Node实现？

├── server
│   ├── core // 核心业务逻辑
│   │   └── src
│   │       ├── domain
│   │       ├── repository
│   │       └── useCase
│   ├── koa
│   │   └── src
│   │       ├── post
│   │       └── user
│   └── nestjs-app
│       ├── src
│           ├── post
│           │   ├── dto
│           │   └── entities
│           └── user
│               └── entities
└── WEB

// server/core/src/domain/post.ts
import { User } from "./user";

export class Post {
  author: User | null = null;
  content: string = "";
  updateAt: Date = new Date(); // timestamp;
  createdAt: Date = new Date(); // timestamp;
  title: string = "";
  id: number = -1;
}

// server/core/src/domain/user.ts
export class User {
  name: string = ''

  email: string = ''

  id: number = -1
}

import { Post } from "../domain/post";

export interface IPostRepository {
  create(post: Post): Promise<boolean>;

  find(id: number): Promise<Post>;

  update(post: Post): Promise<boolean>;

  delete(post: Post): Promise<boolean>;

  findMany(options: { authorId: number }): Promise<Post[]>;
}

...
import { User } from "../domain/user";

export interface IUserRepository {
  create(user: User): Promise<boolean>;
  find(id: number): Promise<User>;
}

import { User } from "../domain/user";
import { IUserRepository } from "../repository/user";

export class UCUser {
  constructor(public userRepo: IUserRepository) {}

  find(id: number) {
    return this.userRepo.find(id);
  }

  create(name: string, email: string) {
    if (email.includes("@test.com")) {
      const user = new User();
      user.email = email;
      user.name = name;
      return this.userRepo.create(user);
    }
    throw Error("Please use legal email");
  }
}

// server/koa/src/user/user.repo.ts
import { PrisMaclient } from "@prisma/client";
import { IUserRepository, User } from "core";

export class UserRepository implements IUserRepository {
  prisma = new PrismaClient();

  async create(user: User): Promise<boolean> {
    const d = await this.prisma.user_ORM_entity.create({
      data: {
        email: user.email,
        name: user.name,
      },
    });

    return !!d;
  }

  async find(id: number): Promise<User> {
    const d = await this.prisma.user_orm_entity.findFirst({
      where: {
        id: id,
      },
    });

    if (d) {
      const u = new User();
      u.email = d?.email;
      u.id = d?.id;
      u.name = d?.name;
      return u;
    }
    throw Error("user id " + id + "not found");
  }
}

// server/koa/src/user/user.controller.ts
import Router from "@koa/router";
import { UCUser } from "core";
import { UserRepository } from "./user.repo";

export const userRouter = new Router({
  prefix: "/user",
});

userRouter.get("/:id", async (ctx, next) => {
  try {
    const service = new UCUser(new UserRepository());
    if (ctx.params.id) {
      const u = await service.find(+ctx.params.id);
      ctx.response.body = JSON.stringify(u);
    }
  } catch (e) {
    ctx.throw(400, "some error on get user", e.message);
  }
  await next();
});