connect and list usernames methods and more comments

index.js

@@ -1,6 +1,6 @@
 // Global logging toggles
 const fileLogging = false;
-const consoleLogging = true;
+const consoleLogging = false;
 
 
 // Imports
@@ -53,31 +53,41 @@ app.post('/disconnect', (req, res) => {
     res.status(200).send();
 });
 
+// Check if string is already in array
+function isStringUnique(arr, str) {
+    let match = true;
+    for (const s of arr)
+        if (s === str) {
+            match = false;
+            break;
+        }
+    return match;
+}
+
 // User wants to change name
 app.post('/nickname', (req, res) => {
     const { id, name } = req.body;
 
-    // Check if name is taken
-    let success = true;
-    for (const u of users)
-        if (u.name === name) {
-            success = false;
-            break;
+    // Check if name is taken, if not, append id until unique
+    const usernames = users.map(u => u.name);
+    let currentChar = 0, newname = name;
+    while (!isStringUnique(usernames, newname)) {
+        if (newname === name)
+            newname += '_';
+        newname += id.charAt(currentChar++);
     }
 
-    if (success) {
-        // Change name if not taken
+    // Change username
     for (const u of users)
         if (u.id === id) {
             if (consoleLogging)
                 console.log(`(Re-)named user with ID '${id}'.`);
-                u.name = name;
+            u.name = newname;
             break;
         }
-    }
 
     // Confirm renaming
-    res.status(200).json({ success });
+    res.status(200).json({ name: newname });
 });
 
 // User is pulling messages
@@ -149,6 +159,30 @@ app.post('/message', (req, res) => {
     res.status(200).send();
 });
 
+// User requesting all names
+app.get('/getNames', (req, res) => {
+    if (consoleLogging)
+        console.log('User requested all names.');
+
+    let names = [{name: "Anonymous", id: "0"}];
+    for (const u of users) {
+        if (u.name === "") {
+            names[0].id = (parseInt(names[0].id) + 1).toString();
+            continue;
+        }
+        names.push({
+            id: u.id,
+            name: u.name
+        });
+    }
+    if (names[0].id === "0")
+        names.splice(0, 1);
+    else
+        names[0].id = `${names[0].id} time(/-s)`;
+
+    res.status(200).json(names);
+});
+
 // Internal server error
 server.on('error', err => {
     console.error('Internal server error', err);