app.js

const express = require('express');
const path = require('path');
const favicon = require('serve-favicon');
const logger = require('morgan');
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');
const session = require('express-session');
const flash = require('connect-flash');
const MongoStore = require('connect-mongo')(session);
const settings = require('./models/settings');
const glob = require('glob');
//const index = require('./routes/index');

const app = express();


//引入socket.io
const server = require('http').Server(app);
const io = require('socket.io')(server);
server.listen(808);

let userList = new Map();
io.on('connection', function (socket) {
  socket.on('login', function (userData) {
    socket.join(userData.room);
    userData.socketId = socket.id;
    userList.set(userData.userId,userData);
    socket.userId = userData.userId;
    let length = io.sockets.adapter.rooms[userData.room].length;
    io.sockets.in(userData.room).emit('system', userData.nickName,'加入',length);
  });
  socket.on('disconnect', function() {
    let userData = userList.get(socket.userId);
    if(userData){
      if(io.sockets.adapter.rooms[userData.room]){
        //通知除自己以外的所有人
        let length = io.sockets.adapter.rooms[userData.room].length;
        socket.broadcast.to(userData.room).emit('system', userData.nickName,'退出',length);
      }
      //将断开连接的用户删除
      socket.leave(userData.room);
      userList.set(socket.userId,null); 
    }
  });
  socket.on('postMsg', function(userData) {
    //将消息发送到除自己外的所有用户
    socket.broadcast.to(userData.room).emit('newMsg', userData.nickName, userData.msg);
  });
});
// let userList = [];
// io.on('connection', function (socket) {
//   //socket.emit('conn', userList);
//   socket.on('login', function (nickName) {
//     socket.nickName = nickName;
//     socket.userIndex = userList.length;
//     userList.push(nickName);
//     io.sockets.emit('system', socket.nickName,'加入',userList)
//   });
//   socket.on('disconnect', function() {
//     //将断开连接的用户删除
//     userList.splice(socket.userIndex, 1);
//     //通知除自己以外的所有人
//     socket.broadcast.emit('system', socket.nickName,'退出',userList);
//   });
//   socket.on('postMsg', function(msg) {
//     //将消息发送到除自己外的所有用户
//     socket.broadcast.emit('newMsg', socket.nickName, msg);
//   });
// });

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(flash());
// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
// app.use(multer({
//   dest: 'public/img/temp',
//   rename: function (fieldname, filename) {
//     //原来文件名
//     return filename;
//     //return Date.now()+filename;
//   }
// }));
app.use(session({
  secret: settings.cookieSecret,
  key: settings.db,//cookie name
  cookie: {maxAge: 1000 * 60 * 60 * 24 * 30},//30 days
  store: new MongoStore({
    //db: settings.db,
    //host: settings.host,
    port: settings.port,
    url:settings.url,
    autoRemove:'native'
  })
}));

// 加载路由
//app.use('/', index);
glob.sync('routes/**/*.js').sort((x,y) =>{
    //排序，先加载所有index的路由
    if(x.indexOf('index') > -1)return -1;
    return 1;
}).forEach(file => {
  const route = require("./"+file);
  //生成URL路径,去掉.js,去掉routes
  let urlPath = file.replace(/\.[^.]*$/, '').replace('routes', '').replace('index','');
  app.use(urlPath, route);
});


// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

module.exports = app;