lark-mvc

MVC for building web server using lark.js

Features:

* Seperate bussiness codes into layers such as `pageServices`, `dataServices` and `daoServices`, which accord to `MVC` concept. (`C`in `MVC` implements in `lark-router`).
* Make calling rules between MVC layers.
* Support hook between MVC layers (not implemented yet).

Install:

npm install lark-mvc

Example:

First of all, import web server and this module in the app.

import mvc from 'lark-mvc/middleware';
import KOA from 'koa'; // koa2.x
const app = new Koa();
app.use(mvc()) 
app.run(3000)

Secondely, write pageServices layer to implement V in MVC, which generates html codes by rendering tempalate and data.

import MVC from 'lark-mvc';
const service = MVC.getInstance().createService();
const access = service.access();

service.render = async (ctx) => {
    let res = '';
    let categroy = await access.data.demo.getArticles(ctx.params.id);
    let articles = await access.data.demo.getArticles(categroy);
    let data = {
        'categroy': categroy,
        'articles': articles
    };
    res = await ctx.render('demo.html', data);
    return res;
})
export default service;

Thirdly, write dataServices layer to implement M in MVC, which collects data from database and passes them to pageServices.

import MVC from 'lark-mvc';
const service = MVC.getInstance().createService();
const access = service.access();

service.getData = async (ctx) => {
    // get data by dao
    let articles = {}
    articles = await access.dao.demo.get(ctx.request.id);
    return articles
}

export default service;

Forthly, write daoServices layer, which is a wrapper of accessing database.

import MVC from 'lark-mvc';
const service = MVC.getInstance().createService();
const access = service.access();

service.getData = async (ctx) => {
    db = redis.conn();
    data = await db.get('test-key');
    return data;
}

export default service;

We have all done here. And then, run the app to see the results. (Remember to compile with babel before running it)