auto delete on inactivity

index.js

@@ -34,6 +34,18 @@ function generatePartialID() {
     return Math.floor(Math.random()*10000).toString().padStart(4, '0');
 }
 
+// Check for user inactivity and delete accordingly
+function userInactivity(name, id) {
+    for (let i = 0; i < users.length; i++)
+        if (users[i].name === name && users[i].id === id && new Date() - users[i].seen > 86400000) {
+            if (consoleLogging)
+                console.log(`Deleting user with ID '${name}#${id}' because of inactivity.`);
+
+            users.splice(i, 1);
+            break;
+        }
+}
+
 
 // User data
 const users = [];
@@ -46,8 +58,10 @@ app.post('/connect', (req, res) => {
     while (!isStringUnique(name_id, `${name}#${id}`))
         id = generatePartialID();
     users.push({
-        socket: req.socket,
-        date: new Date(),
+        deletion: setInterval(
+            ()=>userInactivity(name, id),
+            3600000),
+        seen: new Date(),
         chats: {},
         name,
         id
@@ -95,6 +109,7 @@ app.post('/nickname', (req, res) => {
                 console.log(`(Re-)named user with ID '${oldName}#${id}'.`);
             u.name = name;
             u.id = currentID;
+            u.seen = new Date();
             break;
         }
 
@@ -106,6 +121,12 @@ app.post('/nickname', (req, res) => {
 app.post('/getChat', (req, res) => {
     const { name, id } = req.body;
 
+    for (const u of users)
+        if (u.name === name && u.id === id) {
+            u.seen = new Date();
+            break;
+        }
+
     // Go through users' chats, retrieve messages, save by username
     let chats = {};
     const fullName = `${name}#${id}`;
@@ -140,12 +161,13 @@ app.post('/message', (req, res) => {
             if (!u.chats[recipient])
                 u.chats[recipient] = [];
             u.chats[recipient].push(message);
+            u.seen = new Date();
             break;
         }
 
     // Log message for debugging
     if (consoleLogging)
-        console.log(`User '${name}#${id}' sent message '${message}'.`);
+        console.log(`User with ID '${name}#${id}' sent message '${message}'.`);
 
     // Confirm process
     res.status(200).send();
@@ -154,7 +176,7 @@ app.post('/message', (req, res) => {
 // User requesting all names
 app.get('/getNames', (req, res) => {
     if (consoleLogging)
-        console.log('Some user requested all names.');
+        console.log('Some user requested all usernames + IDs.');
 
     res.status(200).json(users.map(u => {
         return {
@@ -164,6 +186,39 @@ app.get('/getNames', (req, res) => {
     }));
 });
 
+// User sends activity notification
+app.post('/activity', (req, res) => {
+    const { name, id } = req.body;
+
+    if (consoleLogging)
+        console.log(`User with ID '${name}#${id}' is online.`);
+
+    for (const u of users)
+        if (u.name === name && u.id === id) {
+            u.seen = new Date();
+            break;
+        }
+
+    res.status(200).send();
+});
+
+app.post('/login', (req, res) => {
+    const { name, id } = req.body;
+
+    if (consoleLogging)
+        console.log(`Some user requested existence of '${name}#${id}'.`);
+
+    let success = false;
+    for (const u of users)
+        if (u.name === name && u.id === id) {
+            success = true;
+            u.seen = new Date();
+            break;
+        }
+
+    res.status(200).json({success});
+})
+
 // Internal server error
 server.on('error', err => {
     console.error('Internal server error', err);