webstudio/server/src/core/controllers/app.ts

import express from "express";
import { Routes } from "../interfaces/router";
import cors from "cors";
import { Server } from "socket.io";
import { createServer } from "http";
import { SocketSubscriber } from "./socket_controller";
import { dirname } from "path";
import fileUpload from "express-fileupload";
import { SetLastActivePipelineToRealTimeServiceUseCase } from "../usecases/set_active_pipeline_to_realtime_service_usecase";
import { CheckAndCreateStaticFilesFolderUseCase } from "../usecases/check_and_create_static_files_folder_usecase";
import { DataBaseConnectUseCase } from "../usecases/database_connect_usecase";

export class App {
  public app: express.Application;
  public port: number;
  public env: string;
  public socketSubscribers: SocketSubscriber<any>[];
  public io: Server;

  constructor(routes: Routes[], socketSubscribers: SocketSubscriber<any>[]) {
    this.port = 4001;
    this.socketSubscribers = socketSubscribers;
    this.env = "dev";
    this.app = express();
    this.loadAppDependencies().then(() => {
      this.initializeMiddlewares();
      this.initializeRoutes(routes);
    });
  }

  public listen() {
    const httpServer = createServer(this.app);
    const io = new Server(httpServer, {
      cors: { origin: "*" },
    });

    io.on("connection", (socket) => {
      this.socketSubscribers.map((el) => {
        el.emitter.on((e) => {
          socket.emit(el.event, e);
        });
      });
    });

    httpServer.listen(this.port, () => {
      console.info(`=================================`);
      console.info(`======= ENV: ${this.env} =======`);
      console.info(`🚀 HTTP http://localhost:${this.port}`);
      console.info(`🚀 WS ws://localhost:${this.port}`);
      console.info(`=================================`);
    });
    this.io = io;
  }

  public getServer() {
    return this.app;
  }

  private initializeMiddlewares() {
    this.app.use(cors());
    this.app.use(express.json());
    this.app.use(express.urlencoded({ extended: true }));
    this.app.use(express.static("public"));
    this.app.use(
      fileUpload({
        createParentPath: true,
      })
    );
  }

  private initializeRoutes(routes: Routes[]) {
    routes.forEach((route) => {
      this.app.use("/", route.router);
    });
  }
  async loadAppDependencies() {
    await new DataBaseConnectUseCase().call();
    await new CheckAndCreateStaticFilesFolderUseCase().call();
    await new SetLastActivePipelineToRealTimeServiceUseCase().call();
  }

  static staticFilesStoreDir = () => {
    const dir = dirname(__filename);
    const rootDir = dir.slice(0, dir.length - 20);
    return rootDir + "public/";
  };
}