working chat with new message indicator, user profile, and real time feeds

.gitignore

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+/node_modules/

README.md

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 # project_superchat
 Build a realtime multi-room chat application. Make it super.
+
+Richard Bell
+
+To run, clone repo
+Install Redis
+npm start

app.js

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+var express = require('express');
+var path = require('path');
+var favicon = require('serve-favicon');
+var logger = require('morgan');
+var cookieParser = require('cookie-parser');
+var bodyParser = require('body-parser');
+
+var index = require('./routes/index');
+var users = require('./routes/users');
+
+var app = express();
+var server = require('http').Server(app);
+var io = require('socket.io')(server);
+
+const dataMgr = require('./bin/dataMgr');
+// dispatcher for IO requests from client_sockets
+io.on('connection', client => {
+  console.log("New connection!")
+
+  client.on('addRoom', (roomName) => {
+    dataMgr.addRoom(roomName).then(function(){
+      io.emit('newRoom', roomName);
+    });
+  });
+
+  client.on('getMessages', (roomName) => {
+    dataMgr.getMessages(roomName).then(function(data){
+      client.emit('messageList', data);
+    })
+  });
+
+  client.on('sendMessage', (message) => {
+    dataMgr.sendMessage(message.room, message.user, message.text).then(function(data){
+      io.emit('newMessage', {room: message.room, user: message.user, text: message.text});
+    })
+  });
+});
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'hbs');
+
+// uncomment after placing your favicon in /public
+//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
+app.use(function(req, res, next){
+  res.io = io;
+  req.io = io;
+  next();
+});
+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('/', index);
+app.use('/users', users);
+
+// 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 handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+module.exports = {app: app, server: server};

bin/dataMgr.js

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+const redisClient = require("redis").createClient();
+const debug = require('debug')('dataMgr');
+const ROOMKEY = "rooms";
+const USERKEY = "users";
+
+// uncomment for clean-up
+// redisClient.flushall();
+
+// promise returns 1 for room add 0 for duplicate room
+function addRoom(room) {
+  debug(`requesting add room "${room}"`);
+  return new Promise(function(resolve, reject) {
+    redisClient.sadd(ROOMKEY, room, function(err, data) {
+      if (err) reject(err);
+      debug(`room added "${room}"`);
+      resolve(data);
+    });
+  });
+}
+
+// promise returns array with list of rooms
+function listRooms() {
+  debug(`requesting room list`);
+  return new Promise(function(resolve, reject) {
+    redisClient.smembers(ROOMKEY, function(err, data) {
+      if (err) reject(err);
+      debug('returning room list');
+      resolve(data);
+    });
+  });
+}
+
+function addUser(userName, userProfile) {
+  debug(`adding new user "${userName}" with profile ${userProfile}`);
+  return new Promise(function(resolve, reject) {
+    redisClient.hset(USERKEY, userName, JSON.stringify(userProfile), function(err, data) {
+      if (err) reject(err);
+      debug(`user added "${userName}"`);
+      resolve(data);
+    });
+  });
+}
+
+// promise returns object containing the profile associated with userName or Null object if doesn't exist
+function getUser(userName) {
+  debug(`requesting user "${userName}"`);
+  return new Promise(function(resolve, reject) {
+    redisClient.hget(USERKEY, userName, function( err, data) {
+      if (err) reject(err);
+      debug(`user "${userName}" returned with profile ${data}`);
+      resolve(JSON.parse(data));
+    });
+  });
+}
+
+// promise returns 1 if user exists and 0 otherwise
+function isUser(userName) {
+  debug(`checking user exists "${userName}"`);
+  return new Promise(function(resolve, reject) {
+    redisClient.hexists(USERKEY, userName, function (err, data) {
+      if (err) reject(err);
+      debug(`user "${userName}" hexist with response ${data}`);
+      resolve(data);
+    })
+  });
+}
+
+// promise resolves to number for message added where number is count of messages in room
+function sendMessage(roomName, userName, msgText) {
+  debug(`sending message "${msgText}" to room "${roomName}" from user "${userName}"`);
+  return new Promise(function(resolve, reject) {
+    let message = {text: msgText,
+                   sender: userName,
+                   sentTime: Date.now() };
+    redisClient.rpush(roomName, JSON.stringify(message), function (err, data) {
+      if (err) reject(err);
+      debug(`sent "${msgText}" to "${roomName}" from "${userName}"`);
+      resolve(data);
+    })
+  });
+}
+
+// promise resolves to array containing message objects
+function getMessages(roomName) {
+  debug(`requesting messages for "${roomName}"`);
+  return new Promise(function(resolve, reject) {
+    redisClient.lrange(roomName, 0, -1, function(err,data) {
+      if (err) reject(err);
+      debug(`messages for room "${roomName}" are "${data}"`);
+      let msgList = [];
+      data.forEach(function(message) {
+        msgList.push(JSON.parse(message));
+      });
+      resolve(msgList);
+    })
+  });
+}
+
+module.exports = {
+  addRoom,
+  listRooms,
+  addUser,
+  getUser,
+  isUser,
+  sendMessage,
+  getMessages
+};
+
+
+/*
+sendMessage('test room', 'fred', 'hello world').then(function(data){
+  console.log(data);
+});
+sendMessage('test room', 'george', 'Goodbye cruel world').then(function(data){
+  console.log(data);
+});
+getMessages('test room').then(function(data){
+  console.log(data);
+});
+
+addUser('fred', {fullname: 'Fred Smith', createDate: Date.now()}).then(function(data){
+  console.log(data);
+});
+
+getUser('fred').then(function(data){
+  console.log(data);
+});
+
+getUser('george').then(function(data){
+  console.log(data);
+});
+
+isUser('fred').then(function(data){
+  console.log(data);
+});
+isUser('george').then(function(data){
+  console.log(data);
+});
+
+addRoom("test").then(function(data){
+  console.log(data);
+});
+addRoom("test1").then(function(data){
+  console.log(data);
+});
+addRoom("test1").then(function(data){
+  console.log(data);
+});
+listRooms().then(function(data){
+  console.log(data);
+  process.exit();
+});
+*/

bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app').app;
+var debug = require('debug')('project-superchat:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = require('../app').server;
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

package.json

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+{
+  "name": "project-superchat",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "body-parser": "~1.17.1",
+    "cookie-parser": "~1.4.3",
+    "debug": "^2.6.6",
+    "express": "^4.15.2",
+    "hbs": "~4.0.1",
+    "morgan": "~1.8.1",
+    "redis": "^2.7.1",
+    "serve-favicon": "~2.4.2",
+    "socket.io": "^2.0.1",
+    "socket.io-client": "^2.0.1"
+  }
+}