api_extr/src/frameworks/express/routers/api-router.ts

import { Request, Response, Router } from "express";

import PostController from "../../../controllers/api/posts-controller";

export default class ApiRouter {
  private static _instance: Router;

  private constructor() {
    return this;
  }

  private static initRoutes() {
    this._instance.get("/status", (req: Request, res: Response) => {
      res.json("OK").status(200);
    });

    const postController = new PostController();

    this._instance.get("/posts", async (req: Request, res: Response) => {
      postController.petition = this.buildPetition(req, res);
      const response = await postController.index();
      return res.status(response.statusCode).json(response);
    });

    this._instance.post("/posts", async (req: Request, res: Response) => {
      postController.petition = this.buildPetition(req, res);
      const response = await postController.store();
      return res.status(response.statusCode).json(response);
    });

    this._instance.get("/posts/:id", async (req: Request, res: Response) => {
      postController.petition = this.buildPetition(req, res);
      const response = await postController.show();
      return res.status(response.statusCode).json(response);
    });

    this._instance.put("/posts/:id", async (req: Request, res: Response) => {
      postController.petition = this.buildPetition(req, res);
      const response = await postController.update();
      return res.status(response.statusCode).json(response);
    });

    this._instance.delete("/posts/:id", async (req: Request, res: Response) => {
      postController.petition = this.buildPetition(req, res);
      const response = await postController.destroy();
      return res.status(response.statusCode).json(response);
    });
  }

  private static buildPetition(req: Request, res: Response) {
    return {
      request: { ...req, payload: req.body },
      response: { ...res, status: "OK" }
    };
  }

  public static get instance(): Router {
    if (!this._instance) {
      this._instance = Router();
      this.initRoutes();
    }
    return this._instance;
  }
}