Adds session expiration debug message

app/templates/page-footer.php

@@ -4,13 +4,74 @@
             </div>
 
         </div>
-
 <?php } ?>
-        <!-- Footer -->
-        <div id="footer">Jilo Web <?= htmlspecialchars($config['version']) ?> &copy;2024-<?= date('Y') ?> - web interface for <a href="https://lindeas.com/jilo">Jilo</a></div>
-        <!-- /Footer -->
 
+<?php
+        // Preparing the remaining session time debug message
+        $sessionDebugMarkup = '';
+        if (Session::getUsername()) {
+            $canSeeSessionDebug = false;
+            if (isset($userId, $userObject) && method_exists($userObject, 'hasRight')) {
+                $canSeeSessionDebug = ($userId === 1) || (bool)$userObject->hasRight($userId, 'superuser');
+            }
+
+            if ($canSeeSessionDebug) {
+                Session::startSession();
+                $remember = !empty($_SESSION['REMEMBER_ME']);
+                $timeoutSeconds = $remember ? (30 * 24 * 60 * 60) : 7200;
+                $lastActivity = $_SESSION['LAST_ACTIVITY'] ?? null;
+
+                $remainingLabel = 'Session activity timestamp unavailable.';
+                $expiresAtLabel = 'unknown expiry';
+
+                if ($lastActivity !== null) {
+                    $elapsed = time() - (int)$lastActivity;
+                    $secondsRemaining = max(0, $timeoutSeconds - $elapsed);
+
+                    $days = intdiv($secondsRemaining, 86400);
+                    $hours = intdiv($secondsRemaining % 86400, 3600);
+                    $minutes = intdiv($secondsRemaining % 3600, 60);
+                    $seconds = $secondsRemaining % 60;
+
+                    $parts = [];
+                    if ($days > 0) {
+                        $parts[] = $days . ' ' . ($days === 1 ? 'day' : 'days');
+                    }
+                    if ($hours > 0) {
+                        $parts[] = $hours . ' ' . ($hours === 1 ? 'hour' : 'hours');
+                    }
+                    if ($minutes > 0) {
+                        $parts[] = $minutes . ' ' . ($minutes === 1 ? 'minute' : 'minutes');
+                    }
+                    if ($seconds > 0 || empty($parts)) {
+                        $parts[] = $seconds . ' ' . ($seconds === 1 ? 'second' : 'seconds');
+                    }
+
+                    $remainingLabel = implode(' ', $parts);
+                    $expiresAtLabel = date('Y-m-d H:i:s', time() + $secondsRemaining);
+                }
+
+                ob_start();
+?>
+            <span class="tm-session-debug">
+                <strong>Session debug:</strong>
+                <?= $remember ? 'Remember-me' : 'Standard' ?> session expires in <?= htmlspecialchars($remainingLabel) ?> (<?= htmlspecialchars($expiresAtLabel) ?>)
+            </span>
+<?php
+                $sessionDebugMarkup = ob_get_clean();
+            }
+        }
+?>
+
+        <!-- Footer -->
+        <div id="footer">
+            &laquo; <?= htmlspecialchars($config['site_name'] . (!empty($config['site_slogan']) ? ' - ' . ucfirst($config['site_slogan']) : '')) ?> &raquo; 
+            v.<?= htmlspecialchars($config['version']) ?> &copy; 2024-<?= date('Y') ?> &mdash; web interface for <a href="https://lindeas.com/jilo">Jilo</a>
+<?php if ($sessionDebugMarkup !== ''): ?>
+            <?= $sessionDebugMarkup ?>
+<?php endif; ?>
         </div>
+        <!-- /Footer -->
 
 <?php if (Session::getUsername() && $page !== 'logout') { ?>
     <script src="static/js/sidebar.js"></script>
@@ -42,6 +103,5 @@ document.addEventListener('DOMContentLoaded', function() {
 });
 </script>
 
-</body>
+    </body>
-
 </html>

public_html/static/css/main.css

@@ -1,3 +1,13 @@
+.tm-session-debug {
+    display: inline-block;
+    margin-left: 1rem;
+    background: #fff3cd;
+    color: #533f03;
+    border: 1px solid #ffe69c;
+    border-radius: 0.4rem;
+    font-size: 0.75rem;
+}
+
 .tm-profile-view {
     display: flex;
     flex-direction: column;