Added a DISABLE_LOGOUT constant, to allow the logout command to be disabled, for support of external SSO solutions.

app/Controller/Auth.php

@@ -55,9 +55,14 @@ class Auth extends Base
      */
     public function logout()
     {
+        if (! DISABLE_LOGOUT) {
             $this->sessionManager->close();
             $this->response->redirect($this->helper->url->to('auth', 'login'));
         }
+        else {
+            $this->response->redirect($this->helper->url->to('auth', 'index'));
+        }
+    }
 
     /**
      * Redirect the user after the authentication

app/Template/header.php

@@ -84,10 +84,12 @@
                             <i class="fa fa-life-ring fa-fw"></i>
                             <?= $this->url->link(t('Documentation'), 'doc', 'show') ?>
                         </li>
+                        <?php if (! DISABLE_LOGOUT): ?>
                             <li>
                                 <i class="fa fa-sign-out fa-fw"></i>
                                 <?= $this->url->link(t('Logout'), 'auth', 'logout') ?>
                             </li>
+                        <?php endif ?>
                     </ul>
                 </div>
             </li>

app/constants.php

@@ -111,3 +111,6 @@ defined('HTTP_PROXY_HOSTNAME') or define('HTTP_PROXY_HOSTNAME', '');
 defined('HTTP_PROXY_PORT') or define('HTTP_PROXY_PORT', '3128');
 defined('HTTP_PROXY_USERNAME') or define('HTTP_PROXY_USERNAME', '');
 defined('HTTP_PROXY_PASSWORD') or define('HTTP_PROXY_PASSWORD', '');
+
+// Disabling logout (for external SSO authentication)
+defined('DISABLE_LOGOUT') or define('DISABLE_LOGOUT', 0);