一、APP原型

参考另一篇博客：https://my.oschina.net/u/2480757/blog/788578

二、项目需求

为签到App提供登录、注册、请假，签到等相关数据接口。

三、项目结构

四、数据库设计

用到了Mongoose将实体类和数据库对象一一对应起来，同时通过Mongoose操作数据库也极为简单。

###五、编写相关实体类

用户
var userschema=new mongoose.Schema({
username:String,
password:String
});
签到记录
var signinschema=new mongoose.Schema({
user_name:String,
unique_id:String,/username+日期/
am_signin:String,
am_signout:String,
pm_signin:String,
pm_signout:String,
night_signout:String,
night_signin:String,
create_date:{type: Date, default: Date.now}
});
请假记录
var holidayschema=new mongoose.Schema({
user_name:String,
begin_time:String,
end_time:String,
reason:String,
feedback:String
});

六、路由控制

APP需要什么样的接口，在此文件里配置，然后再在相应的控制器中写相应的函数逻辑处理代码。

module.exports = function(app) {/*处理用户登录请求*/app.post('/phone_api/login',User.login);/*处理用户登录请求*/app.post('/phone_api/register',User.register);/*用户提交请假请求*/app.post('/phone_api/add_holiday',Holiday.addHoliday);/*获取用户提交请假记录*/app.post('/phone_api/get_holidays',Holiday.getHolidays);/*用户签到*/app.post('/phone_api/sign_in',Signin.signin);/*用户签到签到记录*/app.post('/phone_api/get_signins',Signin.getSignins);
};

七、主要代码

7.1、用户登录

/*处理用户登录请求*/
exports.login=function(req,res){var username=req.body.username;var password=req.body.password;User.findOne({username:username}, function (err, docs) {if(err){res.json({"status":"error","msg":"error_system"});/*系统错误*/}else if(docs==null){res.json({"status":"error","msg":"error_username"});/*用户名不存在*/} else {if(docs.password==password){res.json({"status":"success","msg":""});}else{res.json({"status":"error","msg":"error_password"});}}})
}

7.2、用户签到：主要判断用户点击的按钮，同时需要当前是否存在用户签到记录，通过一个可预见性的Unique_id来实现。及用户名加日期来限制该记录当天的唯一性。

exports.signin=function(req,res){var unique_id=req.body.unique_id;var user_name=req.body.user_name;var type=req.body.type;var date=req.body.date;Signin.findOne({unique_id:unique_id}, function (err, docs) {if(err){res.json({"status":"error","msg":"error_system"});/*系统错误*/}else if(docs==null){/*如何没有找到签到记录，那么是当天第一次签到*/var newSignin=new Signin();newSignin.unique_id=unique_id;newSignin.user_name=user_name;if(type=="am_signin"){newSignin.am_signin=date;newSignin.am_signout="0";newSignin.pm_signin="0";newSignin.pm_signout="0";newSignin.night_signin="0";newSignin.night_signout="0";newSignin.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else if(type=="am_signout"){newSignin.am_signin="0";newSignin.am_signout=date;newSignin.pm_signin="0";newSignin.pm_signout="0";newSignin.night_signin="0";newSignin.night_signout="0";newSignin.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else if(type=="pm_signin"){newSignin.am_signin="0";newSignin.am_signout="0";newSignin.pm_signin=date;newSignin.pm_signout="0";newSignin.night_signin="0";newSignin.night_signout="0";newSignin.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else if(type=="pm_signout"){newSignin.am_signin="0";newSignin.am_signout="0";newSignin.pm_signin="0";newSignin.pm_signout=date;newSignin.night_signin="0";newSignin.night_signout="0";newSignin.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else if(type=="night_signin"){newSignin.am_signin="0";newSignin.am_signout="0";newSignin.pm_signin="0";newSignin.pm_signout="0";newSignin.night_signin=date;newSignin.night_signout="0";newSignin.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else if(type=="night_signout"){newSignin.am_signin="0";newSignin.am_signout="0";newSignin.pm_signin="0";newSignin.pm_signout="0";newSignin.night_signin="0";newSignin.night_signout=date;newSignin.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}} else {/*如果有记录，只需要修改签到记录即可*/if(type=="am_signin"){/*修改签到记录*/if(docs.am_signin=="0"){docs.am_signin=date;docs.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else{/*如果有记录，则表示已经签到过了*/res.json({"status":"error","msg":"already_signin"});}}else if(type=="am_signout"){if(docs.am_signout=="0"){docs.am_signout=date;docs.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else{/*如果有记录，则表示已经签到过了*/res.json({"status":"error","msg":"already_signin"});}}else if(type=="pm_signin"){if(docs.pm_signin=="0"){docs.pm_signin=date;docs.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else{/*如果有记录，则表示已经签到过了*/res.json({"status":"error","msg":"already_signin"});}}else if(type=="pm_signout"){if(docs.pm_signout=="0"){docs.pm_signout=date;docs.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else{/*如果有记录，则表示已经签到过了*/res.json({"status":"error","msg":"already_signin"});}}else if(type=="night_signin"){if(docs.night_signin=="0"){docs.night_signin=date;docs.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else{/*如果有记录，则表示已经签到过了*/res.json({"status":"error","msg":"already_signin"});}}else if(type=="night_signout"){if(docs.night_signout=="0"){docs.night_signout=date;docs.save(function(err){if(err){res.json({"status":"error","msg":"error_system"})}else{res.json({"status":"success","msg":""});}});}else{/*如果有记录，则表示已经签到过了*/res.json({"status":"error","msg":"already_signin"});}}}})
}

7.3 关于分页获取签到记录 sort按照id倒序排列，limit每页显示10条记录，skip跳过多少条记录。

/*获得用户签到记录*/
exports.getSignins=function(req,res){/*用户id*/var user_name=req.body.user_name;/*页数*/var page_num=req.body.page_num;/*分页*/Signin.find({user_name:user_name}).sort({'_id':-1}).limit(10).skip((page_num-1)*10).exec(function (err, doc) {if(err){res.json({"status":"error","msg":"error_system"});}else{if(doc.isNull){res.json({"status":"success","msg":"data_empty"});}res.json({"status":"success","msg":doc});}})
}

###八、问题与总结 使用Natapp内外网映射工具的时候需要修改端口号，将其从默认3000修改为80。
APP项目源码： https://github.com/dpc761218914/SignIn
Node.js服务端源码： https://github.com/dpc761218914/SignIn_Server