plane/packages/decorators

@plane/decorators

A lightweight TypeScript decorator library for building Express.js controllers with a clean, declarative syntax.

Features

• TypeScript-first design
• Decorators for HTTP methods (GET, POST, PUT, PATCH, DELETE)
• WebSocket support
• Middleware support
• No build step required - works directly with TypeScript files

Installation

This package is part of the Plane workspace and can be used by adding it to your project's dependencies:

{
  "dependencies": {
    "@plane/decorators": "workspace:*"
  }
}

Usage

Basic REST Controller

import { Controller, Get, Post, BaseController } from "@plane/decorators";
import { Router, Request, Response } from "express";

@Controller("/api/users")
class UserController extends BaseController {
  @Get("/")
  async getUsers(req: Request, res: Response) {
    return res.json({ users: [] });
  }

  @Post("/")
  async createUser(req: Request, res: Response) {
    return res.json({ success: true });
  }
}

// Register routes
const router = Router();
const userController = new UserController();
userController.registerRoutes(router);

WebSocket Controller

import {
  Controller,
  WebSocket,
  BaseWebSocketController,
} from "@plane/decorators";
import { Request } from "express";
import { WebSocket as WS } from "ws";

@Controller("/ws/chat")
class ChatController extends BaseWebSocketController {
  @WebSocket("/")
  handleConnection(ws: WS, req: Request) {
    ws.on("message", (message) => {
      ws.send(`Received: ${message}`);
    });
  }
}

// Register WebSocket routes
const router = require("express-ws")(app).router;
const chatController = new ChatController();
chatController.registerWebSocketRoutes(router);

API Reference

Decorators

• @Controller(baseRoute: string) - Class decorator for defining a base route
• @Get(route: string) - Method decorator for HTTP GET endpoints
• @Post(route: string) - Method decorator for HTTP POST endpoints
• @Put(route: string) - Method decorator for HTTP PUT endpoints
• @Patch(route: string) - Method decorator for HTTP PATCH endpoints
• @Delete(route: string) - Method decorator for HTTP DELETE endpoints
• @WebSocket(route: string) - Method decorator for WebSocket endpoints
• @Middleware(middleware: RequestHandler) - Method decorator for applying middleware

Classes

• BaseController - Base class for REST controllers
• BaseWebSocketController - Base class for WebSocket controllers

License

This project is licensed under the GNU Affero General Public License v3.0.