NodeJS-MVC/system/lib/core/handler.js

/**
 * @Author  HonorLee (dev@honorlee.me)
 * @Version 1.0 (2018-05-04)
 * @License MIT
 */
'use strict'
module.exports = function(req,res){
    this.Request  = req;
    this.Response = res;
    this.COOKIE   = req._Cookie;
    this.GET      = req._GET;
    this.POST     = req._POST;
    this.UPLOAD   = req._UPLOAD;

    /**
     * [response description]
     * @return {[type]} [description]
     */
    this.end = this.response = function(){
        let mimeType = 'text/plain';
        let status = null;
        let endContent = '';
        switch(arguments.length){
            case 1:
                endContent = arguments[0];
                break;
            case 2:
                status = arguments[0];
                endContent = arguments[1];
                break;
            case 3:
                status = arguments[0];
                endContent = arguments[1];
                mimeType = arguments[2];
                break;
        }
        if(status) this.Response.statusCode = status;
        if(mimeType) this.Response.setHeader('Content-Type', `${mimeType}; charset=UTF-8`);
        this.Response.write(endContent);
        this.Response.end();
    }
    this.endRedirect = this.responseRedirect = function(location,permanently){
        let status = permanently?301:302;
        this.Response.writeHead(status,{'Location':location});
        this.Response.end();
    }
    /**
     * [responseInJSON description]
     * @param  {[type]} somthing [String,Number,Object]
     */
    this.endJSON = this.responseInJSON = function(somthing){
        let endContent;
        if(typeof somthing == 'string' || typeof somthing == 'number'){
            endContent = {data:somthing};
        }else if(typeof somthing == 'object'){
            endContent = somthing;
        }else{
            return LOGGER.error('Function endInJSON argument type must be string,number or object');
        }
        this.end(200,JSON.stringify(endContent),'text/json');
    }
    /**
     * [responseAPI description]
     * @param  {[type]} statusCode [description]
     * @param  {[type]} somthing   [description]
     */
    this.endAPI = this.responseAPI = function(statusCode,somthing){
        let endContent = {statusCode:statusCode,data:null};
        if(typeof somthing == 'string' || typeof somthing == 'number' || typeof somthing == 'object'){
            endContent.data = somthing;
            this.end(200,JSON.stringify(endContent),'text/json');
        }else{
            return LOGGER.error('Function endAPI argument type must be string,number or object');
        }

    }
    /**
     * [responseView description]
     * @param  {[type]} viewName [description]
     * @param  {[type]} data     [description]
     * @return {[type]}          [description]
     */
    this.endView = this.responseView = function(viewName,data){
        let view = new VIEW(viewName,data);
        if(view && view.html){
            this.end(200,view.html,'text/html');
        }else{
            this.end(502,`View [${viewName}] not found`,'text/plain');
        }
    }

    this.setCookie = function(key,value,expire,path){
        let cookie,originCookie;
        if(this.Response.hasHeader('Set-Cookie')){
            originCookie = this.Response.getHeader('Set-Cookie');
        }
        if(!originCookie) originCookie = [];
        if(typeof originCookie == 'string') originCookie = [originCookie];
        cookie = `${key}=${value}`;
        if(path) cookie += ';path=' + path;
        if(expire){
            let expireTime;
            if(expire=='forever'){
                expireTime = new Date('9999/01/01 00:00:00').toGMTString();
            }else{
                expireTime = new Date(new Date().getTime()+Number(expire)*1000*60).toGMTString();
            }
            cookie += ';expires=' + expireTime;
        }
        originCookie.push(cookie);
        this.Response.setHeader('Set-Cookie',cookie);
    }

    this.renewCookie = function(key,expire,path){
        let originCookieValue = this.COOKIE[key];
        if(!originCookieValue) return false;
        this.setCookie(key,originCookieValue,expire,path);
    }
}