Refactoring code-InitManager initialization manager

Project structure:

Code:

// app.js
const Koa = require('koa')
const requireDirectory = require('require-directory')
const Router = require('koa-router')
// app就是应用程序对象,里面包含各种中间件
const app = new Koa()

requireDirectory(module, './app/api/v1', {
    
    
  visit: whenLoadModule
})

function whenLoadModule(obj) {
    
    
  if (obj instanceof Router) {
    
    
    app.use(obj.routes())
  }
}

app.listen(9999, () => {
    
    
  console.log('server running at port 9999...')
})

// book.js
const Router = require('koa-router')
// 实例化router
const router = new Router()

router.get('/v1/book/latest', (ctx, next) => {
    
    
  ctx.body = {
    
     key: 'book'}
})
module.exports = router

// classic.js
const Router = require('koa-router')
// 实例化router
const router = new Router()

router.get('/v1/classic/latest', (ctx, next) => {
    
    
  ctx.body = {
    
     key: 'classic'}
})

module.exports = router

Our app.js is the entry file, and the code should not be too redundant and complicated. For example, the code here is not good to put in app.js:

so let's refactor the code, create a new core folder in the root directory, and use To put all public methods or classes, create a new file init.js:

// init.js
const requireDirectory = require('require-directory')
const Router = require('koa-router')
class InitManager {
    
    
  static initCore(app) {
    
    
    // 入口方法
    InitManager.app = app
    InitManager.initLoadRouters()
  }

  static initLoadRouters() {
    
    
    requireDirectory(module, `${
      
      process.cwd()}/app/api/`, {
    
    
      visit: whenLoadModule
    })

    function whenLoadModule(obj) {
    
    
      if (obj instanceof Router) {
    
    
        InitManager.app.use(obj.routes())
      }
    }
  }
}

module.exports = InitManager