i add my project

challenge-chat-server/server/.gitignore

@@ -0,0 +1,5 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+

challenge-chat-server/server/index.js

@@ -0,0 +1,95 @@
+const express = require("express");
+const app = express();
+const server = require("http").createServer(app);
+const io = require("socket.io").listen(server);
+const PORT = process.env.PORT || 5000;
+const router = require("./rouetr.js");
+const cors = require("cors");
+let mongoose = require("mongoose");
+let MsgSchema = require("./modules");
+mongoose.connect("mongodb://localhost/chat-app", err => {
+  if (err) {
+    console.log(err);
+  } else {
+    console.log("Connencted to mongodb!");
+  }
+});
+let Chat = mongoose.model("Message", MsgSchema);
+app.use(router);
+app.use(cors());
+let users = [];
+let offline = [];
+io.sockets.on("connection", socket => {
+  function updateMsg() {
+    Chat.find({}, (err, docs) => {
+      if (err) throw err;
+      console.log("loading messages");
+      io.emit("new message", docs);
+    });
+  }
+  console.log("new user is connected");
+  socket.on("delete msg", id => {
+    Chat.deleteOne({ _id: id }, (err, msg) => {
+      if (err) throw err;
+      console.log("success delete");
+    });
+  });
+  socket.on("update msg", (id, data) => {
+    console.log(data);
+
+    Chat.updateOne({ _id: id }, { message: data }, (err, res) => {
+      if (err) throw err;
+      console.log("success update");
+      updateMsg();
+    });
+  });
+
+  socket.on("new user", (data, callback) => {
+    if (users.indexOf(data) !== -1) {
+      callback(false);
+    } else {
+      callback(true);
+      socket.newUser = data;
+      console.log(socket.newUser);
+      users.push(socket.newUser);
+
+      // users[socket.newUser] = socket;
+      updateUsers();
+    }
+  });
+  function updateUsers() {
+    console.log(users, "users");
+    console.log(offline, "offline");
+
+    io.sockets.emit("users name", users, offline);
+  }
+  socket.on("send message", (data, name) => {
+    console.log(data);
+
+    let newMsg = new Chat({ message: data, name: name });
+    newMsg.save(error => {
+      if (error) throw error;
+      updateMsg();
+      console.log("success add msg");
+    });
+  });
+
+  socket.on("disconnect", () => {
+    console.log("there is user was left!");
+    if (!socket.newUser) return;
+    users.splice(users.indexOf(socket.newUser), 1);
+    if (
+      offline.indexOf(socket.newUser) === -1 &&
+      users.indexOf(socket.newUser) > 0
+    ) {
+      offline.push(socket.newUser);
+    }
+
+    updateUsers();
+  });
+  updateMsg();
+});
+
+server.listen(PORT, () =>
+  console.log(`your server is running on port: ${PORT}`)
+);

challenge-chat-server/server/modules.js

@@ -0,0 +1,15 @@
+let mongoose = require("mongoose");
+
+let Schema = mongoose.Schema;
+
+let MsgSchema = new Schema({
+  name: String,
+
+  message: String,
+  Created_date: {
+    type: Date,
+    default: Date.now
+  }
+});
+
+module.exports = MsgSchema;