lark-mvc

MVC for building web server using lark.js

Features:

* Seperate bussiness codes into `pageService`, `dataService` and `dao`, which accord to `MVC` concept. (`C`in `MVC` implements in `lark-router`).
* Make calling rules between MVC layers.
* Support hook between MVC layers.

Install:

npm install lark-mvc

Example:

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

var larkMVC = require('lark-mvc')
var app = require('lark')
app.use(larkMVC()) 
app.run(3000)

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

var pageService = require('lark-mvc').pageService
var demo = pageService.create('demo')
demo.render = function(){
    var res = ''
    co(function *(){
    var categroy = yield this.dataService.demo.getArticles(this.params.id)
    var articles = yield this.dataService.demo.getArticles(categroy)
    var data = {
        'categroy': categroy,
        'articles': articles
    }
    res = yield this.render('demo.html', data)
    })
    return res
})
module.exports = demo

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

var dataService = require('lark-mvc').dataService
var demo = dataService.create('demo')
demo.getData = * function(){
    // get data by dao
    articles = {}
    co (function *(){
        var articles = yeild this.dao.demo.get(this.request.id);
        if articles
    })
    return articles
}

module.exports = demo

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

var dao = require('lark-mvc').dataService
var demo = dao.create('dao')
demo.getData = * function(){
    db = redis.conn()
    data = db.get('test-key')
    return data
}
module.exports = demo

We have all done here. And then, run the app to see the results.

node --harmony app.js

---

一个支持MVC模式的中间件

功能:

* MVC 分层逻辑
* app中只能相邻层调用，不允许跨层调用
* hook功能支持：支持hook功能，在跨层调用前后，发送相应事件，添加自定义逻辑。

示例:

在 bootstrap 中启用本模块

var larkMVC = require('lark-mvc')
var app = require('lark')
app.use(larkMVC()) // lark 默认是支持本模块的，本行代码可以删除

controller层在 lark-router中实现 view 层在template 模板目录里 model 层又分3层: pageService, dataService, dao， 功能如下:

* pageService 负责页面数据逻辑, 被action调用，调用dataService
* dataService 负责业务数据逻辑，被pageService调用，调用dao
* dao 负责数据库相关业务逻辑

pageService 样例:

var pageService = require('lark-mvc').pageService
var demo = pageService.create('demo')
demo.render = function(){
    var res = ''
    co(function *(){
    var categroy = yield this.dataService.demo.getArticles(this.params.id)
    var articles = yield this.dataService.demo.getArticles(categroy)
    var data = {
        'categroy': categroy,
        'articles': articles
    }
    res = yield this.render('demo.html', data)
    })
    return res
})
module.exports = demo

action 层调

this.pageService.demo.render() [ok]
this.dataService.demo.getArticles() [no]

dataService 样例:

var dataService = require('lark-mvc').dataService
var demo = dataService.create('demo')
demo.getData = * function(){
    // get data by dao
    articles = {}
    co (function *(){
        var articles = yeild this.dao.demo.get(this.request.id);
        if articles
    })
    return articles
}

module.exports = demo

dao 样例:

var dao = require('lark-mvc').dataService
var demo = dao.create('dao')
demo.getData = * function(){
    db = redis.conn()
    data = db.get('test-key')
    return data
}
module.exports = demo

层之间hook样例：

pageSerice.on('beferDataService', function(params){
    validate(params)
})