initial commit

chat.js

@@ -0,0 +1,112 @@
+// Load the TCP Library
+net = require('net');
+clc = require('cli-color');
+moment = require('moment');
+
+// Keep track of the chat clients
+var clients = [];
+var names = {};
+
+var broadcastService = {
+  sendMessageHome: function(socket, message) {
+    socket.write(message + '\n');
+  },
+  sendMessage: function(sender, message) {
+    var message = String(message);
+    var date = moment().format('HH:mm:ss');
+    clientService.clients.forEach(function (client) {
+        // Don't want to send it to sender
+        if (client === sender) return;
+        client.write(date + ' - ' + message.trim() + "\n");
+    });
+    
+    // Log it to the server output too
+    process.stdout.write(message)
+  }
+};
+
+var serverService = {
+  getHelpCommands: function(socket) {
+    broadcastService.sendMessageHome(socket, clc.green('List of commands you can run'));
+    broadcastService.sendMessageHome(socket, clc.yellow('/list') + ' - List all connected users.');
+    broadcastService.sendMessageHome(socket, clc.yellow('/name {name}') + ' - Set your user name.');
+  }
+}
+
+var clientService = {
+
+  clients: [],
+  names: {},
+  addNewUser: function (socket) {
+    // Identify this client
+    socket.name = socket.remoteAddress + ":" + socket.remotePort
+    this.names[socket.name] = socket.name;
+    // Put this new client in the list
+    this.clients.push(socket);
+    broadcastService.sendMessageHome(socket, 'Welcome ' + socket.name + ', if you need any help type /help');
+
+    broadcastService.sendMessage(socket, socket.name + " joined the chat");
+    return socket;
+  },
+  removeUser: function(socket) {
+    this.clients.splice(this.clients.indexOf(socket), 1);
+    var name = this.names[socket.name];
+    delete this.names[socket.name];
+
+    broadcastService.sendMessage(socket, name + " left the chat.");
+  },
+  getUserName: function(socket) {
+    return this.names[socket.name];
+  },
+  setUserName: function(socket, name) {
+    this.names[socket.name] = name.trim();
+
+    broadcastService.sendMessageHome(socket, clc.green('Your name has been updated')); 
+  },
+  getListOfNames: function() {
+    var list = [];
+    for (var key in this.names) {
+
+        list.push(this.names[key].trim());
+    }
+    
+    return list.join(', ');
+  }
+
+};
+
+// Start a TCP Server
+net.createServer(function (socket) {
+
+  socket = clientService.addNewUser(socket);
+
+  // Handle incoming messages from clients.
+  socket.on('data', function (data) {
+      var data = String(data);
+      if (data.indexOf('/help') > -1) {
+          serverService.getHelpCommands(socket);
+      }
+      else if (data.indexOf('/list') > -1) {
+        broadcastService.sendMessageHome(socket, clientService.getListOfNames());
+      }
+      else if (data.indexOf('/name ') > -1) {
+        clientService.setUserName(socket, data.substring(6));
+      }
+      else {
+        var name = clientService.getUserName(socket);
+
+        broadcastService.sendMessage(
+          socket,
+          clc.redBright(name) + clc.blueBright(": ") + data
+        );
+      }
+  });
+
+  // Remove the client from the list when it leaves
+  socket.on('end', function () {
+      clientService.removeUser(socket);
+  });
+}).listen(5000);
+
+// Put a friendly message on the terminal of the server.
+console.log("Chat server running at port 5000");