ckn.backend/server/FrontendMiddleware.js

CKN Framework for Backend

import {File} from 'ckn.stream';
import {Middleware} from "../core/Middleware.js";
import express from "express";
import webpack from "webpack";
import path from "path";
import fs from "fs";

class FrontendMiddleware extends Middleware {
    constructor() {
        super();
        this.priority = 5;
        this.clientFolder = './client/';
        this.appFolder = './apps';
        this.entry = ['./apps/app.js'];
        this.output = 'app.js';
    }

    changeClientFolder(folder) {
        this.clientFolder = folder
        return this;
    }

    changeAppFolder(folder) {
        this.appFolder = folder;
        return this;
    }

    changeOutputFileName(file) {
        this.output = file;
        return this;
    }

    async onStartingServer(backend, next) {
        backend.server.use("/ckn.core/", express.static("./node_modules/ckn.core/"));
        backend.server.use("/ckn.frontend/", express.static("./node_modules/ckn.frontend/"));
        backend.server.use("/ckn.frontend/ui", express.static("./node_modules/ckn.frontend/ui"));
        if (!fs.existsSync(path.resolve(process.cwd(), this.appFolder))) {
            fs.mkdirSync(path.resolve(process.cwd(), this.appFolder));
        }
        if (!fs.existsSync(path.resolve(process.cwd(), this.clientFolder))) {
            fs.mkdirSync(path.resolve(process.cwd(), this.clientFolder));
        }
        webpack({
            entry: this.entry,
            mode: 'production',
            output: {
                path: path.resolve(process.cwd(), this.clientFolder),
                filename: this.output
            },
            optimization: {
                minimize: false
            }
        }, async (err, stats) => {
            if (err || stats.hasErrors()) {
                throw new Error(stats);
            }
            else {
                next();
            }
        });
    }
}

export {FrontendMiddleware}