add online sessions info

.env

@@ -19,7 +19,7 @@ APP_ENV=dev
 APP_SECRET=EDIT_ME
 ###< symfony/framework-bundle ###
 
-APP_VERSION=1.0.3
+APP_VERSION=1.1.0
 
 APP_NAME=KevaChat
 
@@ -61,6 +61,9 @@ APP_KEVACOIN_ROOM_NAMESPACE_DEFAULT=EDIT_ME
 # Allow users to read external node rooms
 APP_KEVACOIN_ROOM_NAMESPACES_EXTERNAL=
 
+# Online session expiration timeout
+APP_SESSION_ONLINE_TIMEOUT=900
+
 # Allow remotes to create new rooms (namespaces)
 APP_ADD_ROOM_REMOTE_IP_REGEX=/.*/
 

config/services.yaml

@@ -23,6 +23,7 @@ parameters:
     app.kevacoin.explorer.url: '%env(APP_KEVACOIN_EXPLORER_URL)%'
     app.kevacoin.mine.pool.url: '%env(APP_KEVACOIN_MINE_POOL_URL)%'
     app.kevacoin.mine.solo.url: '%env(APP_KEVACOIN_MINE_SOLO_URL)%'
+    app.session.online.timeout: '%env(APP_SESSION_ONLINE_TIMEOUT)%'
     app.add.room.remote.ip.regex: '%env(APP_ADD_ROOM_REMOTE_IP_REGEX)%'
     app.add.post.remote.ip.regex: '%env(APP_ADD_POST_REMOTE_IP_REGEX)%'
     app.add.post.remote.ip.delay: '%env(APP_ADD_POST_REMOTE_IP_DELAY)%'

src/Controller/ModuleController.php

@@ -10,8 +10,11 @@ use Symfony\Component\HttpFoundation\Request;
 
 class ModuleController extends AbstractController
 {
-    public function info(): Response
+    public function info(
+        Request $request
+    ): Response
     {
+        // Connect kevacoin
         $client = new \Kevachat\Kevacoin\Client(
             $this->getParameter('app.kevacoin.protocol'),
             $this->getParameter('app.kevacoin.host'),
@@ -20,9 +23,49 @@ class ModuleController extends AbstractController
             $this->getParameter('app.kevacoin.password')
         );
 
+        // Connect memcached
+        $memcached = new \Memcached();
+        $memcached->addServer(
+            $this->getParameter('app.memcached.host'),
+            $this->getParameter('app.memcached.port')
+        );
+
+        // Get sessions registry
+        $online = md5(
+            sprintf(
+                '%s.ModuleController::info:sessions',
+                __DIR__
+            )
+        );
+
+        // Drop offline sessions
+        $sessions = [];
+
+        foreach ((array) $memcached->get($online) as $ip => $time)
+        {
+            if (time() - $time < $this->getParameter('app.session.online.timeout'))
+            {
+                $sessions[$ip] = $time;
+            }
+        }
+
+        // Update current session time
+        $sessions[$request->getClientIp()] = time();
+
+        // Update session registry
+        $memcached->set(
+            $online,
+            $sessions,
+            $this->getParameter('app.session.online.timeout')
+        );
+
+        // Render the template
         return $this->render(
             'default/module/info.html.twig',
             [
+                'online' => count(
+                    $sessions
+                ),
                 'wallet' =>
                 [
                     'balance' => (float) $client->getBalance(),

templates/default/layout.html.twig

@@ -20,7 +20,10 @@
                 {{
                     render(
                         controller(
-                            'App\\Controller\\ModuleController::info'
+                            'App\\Controller\\ModuleController::info',
+                            {
+                                request : request
+                            }
                         )
                     )
                 }}

templates/default/module/info.html.twig

@@ -1,4 +1,6 @@
 <div>
+    {{ 'online:' | trans }} {{ online }}
+    /
     {{ 'block:' | trans }} {{ wallet.block }}
     /
     {{ 'balance:' | trans }} {{ wallet.balance }}