Add concept of channels and allow users to create them

src/channel.js

@@ -0,0 +1,11 @@
+function Channel(name) {
+  this.name = name
+  this.userlist = []
+
+  this.join = function(user) {
+    this.userlist.push(user)
+    user.sendRaw(`:${user.nickname} JOIN ${this.name}`)
+  }
+}
+
+module.exports = Channel

src/server.js

@@ -1,5 +1,6 @@
 const net = require("net")
 const User = require("../src/user.js")
+const Channel = require("../src/channel.js")
 
 const RPL_WELCOME = '001'
 const ERR_NOSUCHNICK = '401'
@@ -20,6 +21,7 @@ server.create = function create(config = {}) {
         password = config.password
     }
     let userlist = {}
+    let channellist = {}
     let server = net.createServer((socket) => {
         const user = new User(socket)
         if (!config.password) {
@@ -85,6 +87,12 @@ server.create = function create(config = {}) {
 
                         }
                         break;
+                    case "JOIN":
+                        let channelname = tokenized[1]
+                        let channel = new Channel(channelname)
+                        channel.join(user)
+                        channellist[channelname] = channel
+                        break;
                     case "QUIT":
                         server.closeConnection(user.nickname)
                         break;

src/user.js

@@ -44,6 +44,9 @@ function User(socket) {
     this.sendMsg = function (from, message) {
         this.connection.write(`:${from.nickname} PRIVMSG ${this.nickname} :${message}\r\n`, "ascii")
     }
+    this.sendRaw = function(message) {
+      this.connection.write(`${message}\r\n`, "ascii")
+    }
 }
 
 module.exports = User

test/command_join.js

@@ -0,0 +1,28 @@
+const assert = require('assert');
+const EventEmitter = require('events');
+const IRCServer = require("../src/server.js");
+
+describe("JOIN OK", function () {
+    it("should handle a JOIN command -> JOIN #testchan", function (done) {
+        const server = IRCServer.create()
+        let mockedSock = new EventEmitter()
+        mockedSock.address = function () {
+            return {port: 12346, family: 'IPv4', address: '127.0.0.1'}
+        }
+        mockedSock.write = function (data) {
+            let answer = data.toString("ascii")
+            if (answer.indexOf("JOIN") >= 0) {
+                assert.equal(answer, ":some_nick JOIN #testchan\r\n")
+                done()
+            }
+        }
+        mockedSock.destroy = function () {
+            done("Destroyed socket without answering")
+        }
+
+        server.emit("connection", mockedSock)
+        mockedSock.emit('data', Buffer.from("NICK some_nick\r\n", "ascii"))
+        mockedSock.emit('data', Buffer.from("USER guest tolmoon tolsun :Ronnie Reagan\r\n", "ascii"))
+        mockedSock.emit('data', Buffer.from("JOIN #testchan\r\n", "ascii"))
+    })
+})