app.js

@@ -24,7 +24,7 @@ let servePort;
 
 // Object to store all the information we want to save
 let config = {
-  userName: 'Anonymous',
+  userName: '',
   userAvatar: '',
   rooms: []
 };
@@ -95,8 +95,13 @@ async function initialize() {
     });
   }
 
+  readConfigFromFile();
+  config.rooms.forEach(room => {
+    addRoomToList(room);
+  });
+
   const registerDiv = document.querySelector('#register');
-  if (registerDiv) {
+  if (registerDiv && !config.userName) {
     registerDiv.classList.remove('hidden');
   }
 
@@ -185,7 +190,7 @@ async function continueRegistration(regUsername) {
     return;
   }
 
-  config.username = regUsername;
+  config.userName = regUsername;
   setupDiv.classList.remove('hidden');
   document.querySelector('#register').classList.add('hidden');
   loadingDiv.classList.add('hidden');
@@ -193,7 +198,7 @@ async function continueRegistration(regUsername) {
   const randomTopic = crypto.randomBytes(32);
   document.querySelector('#chat-room-topic').innerText = truncateHash(b4a.toString(randomTopic, 'hex'));
 
-  writeJsonToFile("./config.json", config);
+  writeConfigToFile("./config.json");
 }
 
 async function createChatRoom() {
@@ -240,7 +245,7 @@ function addRoomToList(topic) {
   roomList.appendChild(roomItem);
 
   config.rooms.push(topic);
-  writeJsonToFile("./config.json", config);
+  writeConfigToFile("./config.json");
 }
 
 function switchRoom(topic) {
@@ -262,7 +267,7 @@ function leaveRoom() {
   document.querySelector('#setup').classList.remove('hidden');
 
   config.rooms = config.rooms.filter(e => e !== currentRoom.topic);
-  writeJsonToFile("./config.json", config);
+  writeConfigToFile("./config.json");
 }
 
 function sendMessage(e) {
@@ -397,7 +402,7 @@ async function updateIcon(username, avatarBuffer) {
     userIcon.src = avatarUrl;
 
     config.userAvatar = avatarUrl;
-    writeJsonToFile("./config.json", config);
+    writeConfigToFile("./config.json");
   }
 }
 
@@ -413,11 +418,18 @@ function toggleSetupView() {
   setupDiv.classList.toggle('hidden');
 }
 
-function writeJsonToFile(filePath, data) {
-  fs.writeFile(filePath, JSON.stringify(data), (err) => {
+function writeConfigToFile(filePath) {
+  fs.writeFile(filePath, JSON.stringify(config), (err) => {
     if (err) return console.error(err);
     console.log("File has been created");
   });
 }
 
+function readConfigFromFile(filePath) {
+  fs.readFile(filePath, 'utf8', (err, data) => {
+    if(err) return console.error("Error while reading config.json! ", err);
+    config = JSON.parse(data);
+  });
+}
+
 initialize();