Added recaptcha

README.md

@@ -4,26 +4,47 @@
 
 ## Anpassung der Useranmeldung
 
-#### Registrierung ohne Captcha und E-Mail-Verifikation
+#### Registrierung mit Google reCAPTCHA v3
 
 **Beschreibung:**
-Die Registrierung wurde so angepasst, dass Benutzer ohne Captcha und E-Mail-Verifikation registriert werden können. Benutzer werden nach der Registrierung automatisch aktiviert.
+Die Registrierung wurde mit Google reCAPTCHA v3 abgesichert. reCAPTCHA v3 arbeitet unsichtbar im Hintergrund und analysiert das Benutzerverhalten, um Bots zu erkennen. E-Mail-Verifizierung ist deaktiviert - Benutzer werden nach der Registrierung automatisch aktiviert.
 
 **Technische Umsetzung:**
-- Entfernung des Captcha-Features aus dem Registrierungsprozess
-- Deaktivierung der E-Mail-Verifizierung
-- Automatische Aktivierung neuer Benutzerkonten
-- Vereinfachung des Registrierungsformulars
+- Integration von Google reCAPTCHA v3 (unsichtbar, keine Checkbox)
+- Score-basierte Validierung (0.0 = Bot, 1.0 = Mensch)
+- Blockierung bei Score unter 0.5
+- Konfiguration über `RECAPTCHA_SITE_KEY` und `RECAPTCHA_SECRET_KEY`
 
-**Admin-Funktion:**
-- Nur Administratoren können über das gleiche Formular neue Benutzer anlegen
-- Sicherstellung, dass nur autorisierte Personen Benutzerkonten erstellen können
+**Code-Beispiel (View):**
+```html
+<script src="https://www.google.com/recaptcha/api.js?render=SITE_KEY"></script>
+<script>
+grecaptcha.ready(function() {
+    grecaptcha.execute('SITE_KEY', {action: 'register'}).then(function(token) {
+        document.getElementById('recaptcha-response').value = token;
+    });
+});
+</script>
+```
+
+**Code-Beispiel (Server-Validierung):**
+```php
+$response = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret=' . $secret_key . '&response=' . $recaptcha_response);
+$response_data = json_decode($response);
+if (!$response_data->success || $response_data->score < 0.5) {
+    // Bot erkannt oder Validierung fehlgeschlagen
+}
+```
+
+**Vorteile von v3:**
+- Keine Benutzerinteraktion erforderlich
+- Bessere User Experience
+- Intelligente Bot-Erkennung durch Verhaltensanalyse
 
 ```
 <!-- Screenshot Platzhalter -->
-[📸 Screenshot: Vereinfachtes Registrierungsformular]
-[📸 Screenshot: Admin-Benutzererstellung]
-[📸 Screenshot: Automatisch aktivierter Benutzer]
+[📸 Screenshot: Registrierungsformular]
+[📸 Screenshot: reCAPTCHA Badge]
 ```
 
 ---
@@ -70,6 +91,38 @@ Implementierung einer öffentlichen Benutzerliste, die alle Benutzer und ihre Gr
 
 ---
 
+## Notizen-App
+
+#### Persönliche Notizen mit Markdown-Unterstützung
+
+**Beschreibung:**
+Implementierung einer vollständigen Notizen-Anwendung mit CRUD-Funktionalität (Create, Read, Update, Delete). Benutzer können persönliche Notizen erstellen, bearbeiten und löschen.
+
+**Features:**
+- **Markdown-Unterstützung**: Notizen werden mit SimpleMarkdown gerendert
+- **AJAX-Integration**: Alle Operationen ohne Seiten-Neuladung
+- **Benutzergebunden**: Jeder Benutzer sieht nur seine eigenen Notizen
+- **Echtzeit-Vorschau**: Markdown wird direkt in HTML umgewandelt
+
+**Technische Umsetzung:**
+- NoteController mit vollständiger CRUD-Implementierung
+- NoteModel für Datenbankoperationen
+- SimpleMarkdown-Library für Markdown-Parsing
+- AJAX-Endpoints für dynamische Interaktion
+
+**Zugriffsrechte:**
+- Nur für angemeldete Benutzer verfügbar
+- Jeder Benutzer hat nur Zugriff auf seine eigenen Notizen
+
+```
+<!-- Screenshot Platzhalter -->
+[📸 Screenshot: Notizen-Übersicht]
+[📸 Screenshot: Notiz erstellen/bearbeiten]
+[📸 Screenshot: Markdown-Vorschau]
+```
+
+---
+
 ## jQuery - Einführung und Grundlagen
 
 #### JavaScript Basics

application/config/config.development.php

@@ -63,19 +63,17 @@ return array(
      * DB_CHARSET The charset, necessary for security reasons. Check Database.php class for more info.
      */
     'DB_TYPE' => 'mysql',
-    'DB_HOST' => 'localhost',
+    'DB_HOST' => '127.0.0.1',
     'DB_NAME' => 'huge',
     'DB_USER' => 'root',
     'DB_PASS' => 'root',
     'DB_PORT' => '3306',
     'DB_CHARSET' => 'utf8',
     /**
-     * Configuration for: Captcha size
-     * The currently used Captcha generator (https://github.com/Gregwar/Captcha) also runs without giving a size,
-     * so feel free to use ->build(); inside CaptchaModel.
+     * Configuration for: Google reCAPTCHA v2
      */
-    'CAPTCHA_WIDTH' => 359,
-    'CAPTCHA_HEIGHT' => 100,
+    'RECAPTCHA_SITE_KEY' => 'recaptcha-site-key',
+    'RECAPTCHA_SECRET_KEY' => 'recaptcha-secret-key',
     /**
      * Configuration for: Cookies
      * 1209600 seconds = 2 weeks

application/controller/DatabaseController.php

@@ -0,0 +1,144 @@
+<?php
+
+/**
+ * Class DatabaseController
+ * 
+ * Controller for managing databases and showing their structure
+ */
+class DatabaseController extends Controller
+{
+    /**
+     * Construct this object by extending the basic Controller class
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        
+        // Only logged-in users can access the database manager
+        Auth::checkAuthentication();
+    }
+
+    /**
+     * Main database management interface
+     */
+    public function index()
+    {
+        $this->View->render('database/index', array(
+            'databases' => DatabaseModel::getAllDatabases(),
+            'current_db' => Config::get('DB_NAME')
+        ));
+    }
+
+    /**
+     * Show details of a specific database
+     * @param string $database_name
+     */
+    public function show($database_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+
+        $this->View->render('database/show', array(
+            'tables' => DatabaseModel::getTablesInDatabase($database_name),
+            'database_name' => $database_name,
+            'table_info' => DatabaseModel::getTableDetails($database_name)
+        ));
+    }
+
+    /**
+     * Create a new database
+     */
+    public function create()
+    {
+        $database_name = Request::post('database_name');
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            
+            if (DatabaseModel::createDatabase($database_name)) {
+                echo json_encode([
+                    'success' => true, 
+                    'message' => 'Database created successfully'
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false, 
+                    'message' => 'Failed to create database'
+                ]);
+            }
+            return;
+        }
+        
+        Redirect::to('database');
+    }
+
+    /**
+     * Delete a database
+     * @param string $database_name
+     */
+    public function delete($database_name)
+    {
+        // Prevent deletion of the current database
+        if ($database_name === Config::get('DB_NAME')) {
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                echo json_encode([
+                    'success' => false, 
+                    'message' => 'Cannot delete the currently connected database'
+                ]);
+                return;
+            }
+            Redirect::to('database');
+            return;
+        }
+
+        $success = DatabaseModel::deleteDatabase($database_name);
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            if ($success) {
+                echo json_encode([
+                    'success' => true, 
+                    'message' => 'Database deleted successfully'
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false, 
+                    'message' => 'Failed to delete database'
+                ]);
+            }
+            return;
+        }
+        
+        Redirect::to('database');
+    }
+
+    /**
+     * Get database structure as JSON (AJAX endpoint)
+     * @param string $database_name
+     */
+    public function getStructure($database_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+
+        $structure = DatabaseModel::getDatabaseStructure($database_name);
+        
+        header('Content-Type: application/json');
+        echo json_encode([
+            'success' => true,
+            'structure' => $structure
+        ]);
+    }
+
+    /**
+     * Check if the request is an AJAX request
+     */
+    private function isAjaxRequest()
+    {
+        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && 
+               strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
+    }
+}

application/controller/DbUserController.php

@@ -0,0 +1,201 @@
+<?php
+
+/**
+ * Class UserController for Database Manager
+ * 
+ * Controller for managing MySQL users and privileges
+ */
+class DbUserController extends Controller
+{
+    /**
+     * Construct this object by extending the basic Controller class
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        
+        // Only admin users can access database user management
+        Auth::checkAuthentication();
+        Auth::checkAdminAuthentication();
+    }
+
+    /**
+     * List all database users
+     */
+    public function index()
+    {
+        $this->View->render('dbuser/index', array(
+            'users' => DbUserModel::getAllUsers(),
+            'current_user' => Config::get('DB_USER')
+        ));
+    }
+
+    /**
+     * Create a new database user
+     */
+    public function create()
+    {
+        if (Request::post('submit_create_user')) {
+            $username = Request::post('username');
+            $password = Request::post('password');
+            $host = Request::post('host');
+            
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                
+                if (DbUserModel::createUser($username, $password, $host)) {
+                    echo json_encode([
+                        'success' => true,
+                        'message' => 'User created successfully',
+                        'reload' => true
+                    ]);
+                } else {
+                    echo json_encode([
+                        'success' => false,
+                        'message' => 'Failed to create user'
+                    ]);
+                }
+                return;
+            }
+            
+            if (DbUserModel::createUser($username, $password, $host)) {
+                Redirect::to('dbuser');
+            } else {
+                Redirect::to('dbuser');
+            }
+            return;
+        }
+
+        // Show create user form
+        $this->View->render('dbuser/create');
+    }
+
+    /**
+     * Edit user details and privileges
+     * @param string $username
+     * @param string $host
+     */
+    public function edit($username, $host)
+    {
+        if (Request::post('submit_edit_user')) {
+            $new_password = Request::post('password');
+            $privileges = Request::post('privileges');
+            
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                
+                $success = true;
+                $message = 'User updated successfully';
+                
+                if (!empty($new_password)) {
+                    if (!DbUserModel::updateUserPassword($username, $host, $new_password)) {
+                        $success = false;
+                        $message = 'Failed to update user password';
+                    }
+                }
+                
+                if ($success && !DbUserModel::updateUserPrivileges($username, $host, $privileges)) {
+                    $success = false;
+                    $message = 'Failed to update user privileges';
+                }
+                
+                if ($success) {
+                    echo json_encode([
+                        'success' => true,
+                        'message' => $message
+                    ]);
+                } else {
+                    echo json_encode([
+                        'success' => false,
+                        'message' => $message
+                    ]);
+                }
+                return;
+            }
+            
+            $success = true;
+            if (!empty($new_password)) {
+                $success = DbUserModel::updateUserPassword($username, $host, $new_password);
+            }
+            
+            if ($success && !DbUserModel::updateUserPrivileges($username, $host, $privileges)) {
+                $success = false;
+            }
+            
+            Redirect::to('dbuser');
+            return;
+        }
+
+        // Show edit user form
+        $this->View->render('dbuser/edit', array(
+            'user' => DbUserModel::getUserDetails($username, $host),
+            'privileges' => DbUserModel::getUserPrivileges($username, $host),
+            'databases' => DatabaseModel::getAllDatabases()
+        ));
+    }
+
+    /**
+     * Delete a user
+     * @param string $username
+     * @param string $host
+     */
+    public function delete($username, $host)
+    {
+        // Prevent deletion of current user
+        if ($username === Config::get('DB_USER')) {
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                echo json_encode([
+                    'success' => false,
+                    'message' => 'Cannot delete the currently connected user'
+                ]);
+                return;
+            }
+            Redirect::to('dbuser');
+            return;
+        }
+
+        $success = DbUserModel::deleteUser($username, $host);
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            
+            if ($success) {
+                echo json_encode([
+                    'success' => true,
+                    'message' => 'User deleted successfully'
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false,
+                    'message' => 'Failed to delete user'
+                ]);
+            }
+            return;
+        }
+        
+        Redirect::to('dbuser');
+    }
+
+    /**
+     * Show user privileges
+     * @param string $username
+     * @param string $host
+     */
+    public function privileges($username, $host)
+    {
+        $this->View->render('dbuser/privileges', array(
+            'user' => DbUserModel::getUserDetails($username, $host),
+            'privileges' => DbUserModel::getUserPrivileges($username, $host)
+        ));
+    }
+
+    /**
+     * Check if the request is an AJAX request
+     */
+    private function isAjaxRequest()
+    {
+        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && 
+               strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
+    }
+}

application/controller/MessageController.php

@@ -5,34 +5,23 @@ class MessageController extends Controller
     public function __construct()
     {
         parent::__construct();
-        
-        // Require login for all message features
         Auth::checkAuthentication();
     }
 
-    /**
-     * Check if the request is an AJAX request
-     */
     private function isAjaxRequest()
     {
         return isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&
                strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
     }
 
-    /**
-     * Send a message to a specific user via URL parameters
-     * URL format: message/send/{receiver_id}/{subject}/{message}
-     */
     public function send()
     {
-        // Handle POST request
         if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             $receiver_id = isset($_POST['receiver_id']) ? $_POST['receiver_id'] : null;
             $subject = isset($_POST['subject']) ? $_POST['subject'] : 'No Subject';
             $message = isset($_POST['message']) ? $_POST['message'] : null;
 
             if (!$receiver_id || !$message) {
-                // Return JSON for AJAX requests
                 if ($this->isAjaxRequest()) {
                     header('Content-Type: application/json');
                     echo json_encode(['success' => false, 'message' => 'Receiver and message are required']);
@@ -44,11 +33,9 @@ class MessageController extends Controller
                 return;
             }
 
-            // Send the message
             $sender_id = Session::get('user_id');
             $success = MessageModel::sendToUser($sender_id, $receiver_id, $subject, $message);
 
-            // Return JSON for AJAX requests
             if ($this->isAjaxRequest()) {
                 header('Content-Type: application/json');
                 if ($success) {
@@ -59,14 +46,12 @@ class MessageController extends Controller
                 return;
             }
 
-            // Regular request handling
             if ($success) {
                 Session::add('feedback_positive', 'Message sent successfully');
             } else {
                 Session::add('feedback_negative', 'Failed to send message');
             }
 
-            // If coming from conversation view, return there
             if (isset($_SERVER['HTTP_REFERER']) && strpos($_SERVER['HTTP_REFERER'], 'conversation') !== false) {
                 Redirect::to('message/conversation/' . $receiver_id);
             } else {
@@ -75,7 +60,7 @@ class MessageController extends Controller
             return;
         }
 
-        // Handle GET request
+        // GET request: message/send/{receiver_id}/{subject}/{message}
         $url_parts = explode('/', trim($_SERVER['REQUEST_URI'], '/'));
         $receiver_id = isset($url_parts[2]) ? $url_parts[2] : null;
         $subject = isset($url_parts[3]) ? urldecode($url_parts[3]) : null;
@@ -87,7 +72,6 @@ class MessageController extends Controller
             return;
         }
 
-        // Verify receiver exists
         $receiver = UserModel::getPublicProfileOfUser($receiver_id);
         if (!$receiver) {
             header('Content-Type: application/json');
@@ -95,7 +79,6 @@ class MessageController extends Controller
             return;
         }
 
-        // Send the message
         $sender_id = Session::get('user_id');
         $success = MessageModel::sendToUser($sender_id, $receiver_id, $subject, $message);
 
@@ -107,14 +90,8 @@ class MessageController extends Controller
         }
     }
 
-    /**
-     * Send a message to a group via URL parameters
-     * URL format: message/sendgroup/{group_type}/{subject}/{message}
-     * group_type can be: admins, moderators, all_users
-     */
     public function sendgroup()
     {
-        // Handle POST request
         if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             $group_type = isset($_POST['group_type']) ? $_POST['group_type'] : null;
             $subject = isset($_POST['subject']) ? $_POST['subject'] : 'No Subject';
@@ -126,14 +103,12 @@ class MessageController extends Controller
                 return;
             }
 
-            // Validate group type
             if (!in_array($group_type, ['admins', 'moderators', 'all_users'])) {
                 Session::add('feedback_negative', 'Invalid group type');
                 Redirect::to('message');
                 return;
             }
 
-            // Send the message
             $sender_id = Session::get('user_id');
             $success = MessageModel::sendToGroup($sender_id, $group_type, $subject, $message);
 
@@ -147,7 +122,7 @@ class MessageController extends Controller
             return;
         }
 
-        // Handle GET request
+        // GET request: message/sendgroup/{group_type}/{subject}/{message}
         $url_parts = explode('/', trim($_SERVER['REQUEST_URI'], '/'));
         $group_type = isset($url_parts[2]) ? $url_parts[2] : null;
         $subject = isset($url_parts[3]) ? urldecode($url_parts[3]) : null;
@@ -159,14 +134,12 @@ class MessageController extends Controller
             return;
         }
 
-        // Validate group type
         if (!in_array($group_type, ['admins', 'moderators', 'all_users'])) {
             header('Content-Type: application/json');
             echo json_encode(['success' => false, 'message' => 'Invalid group type. Must be: admins, moderators, or all_users']);
             return;
         }
 
-        // Send the message
         $sender_id = Session::get('user_id');
         $success = MessageModel::sendToGroup($sender_id, $group_type, $subject, $message);
 
@@ -178,72 +151,50 @@ class MessageController extends Controller
         }
     }
 
-    /**
-     * Handle reply to a message
-     */
     public function reply()
     {
-        // Always return JSON for this endpoint
+        while (ob_get_level()) ob_end_clean();
+
         header('Content-Type: application/json');
 
-        // Start output buffering to catch any accidental output
-        ob_start();
-        
-        try {
-            if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
-                echo json_encode(['success' => false, 'message' => 'Invalid request method']);
-                exit();
-            }
-            
-            $receiver_id = isset($_POST['receiver_id']) ? $_POST['receiver_id'] : null;
-            $message = isset($_POST['message']) ? $_POST['message'] : null;
-            
-            if (!$receiver_id || !$message) {
-                echo json_encode(['success' => false, 'message' => 'Receiver and message are required']);
-                exit();
-            }
-            
-            $sender_id = Session::get('user_id');
-            if (!$sender_id) {
-                echo json_encode(['success' => false, 'message' => 'Not logged in']);
-                exit();
-            }
-            
-            // Send the message (using sendToUser without subject)
-            $success = MessageModel::sendToUser($sender_id, $receiver_id, 'Re: Message', $message);
-            
-            if ($success) {
-                echo json_encode(['success' => true, 'message' => 'Reply sent successfully']);
-            } else {
-                echo json_encode(['success' => false, 'message' => 'Failed to send reply']);
-            }
-        } catch (Exception $e) {
-            // Catch any PHP errors
-            echo json_encode(['success' => false, 'message' => 'Server error: ' . $e->getMessage()]);
+        if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+            echo json_encode(['success' => false, 'message' => 'Invalid request method']);
+            exit();
         }
 
-        // Clean any output buffer and exit
-        ob_end_clean();
+        $receiver_id = isset($_POST['receiver_id']) ? $_POST['receiver_id'] : null;
+        $message = isset($_POST['message']) ? $_POST['message'] : null;
+
+        if (!$receiver_id || !$message) {
+            echo json_encode(['success' => false, 'message' => 'Receiver and message are required']);
+            exit();
+        }
+
+        $sender_id = Session::get('user_id');
+        if (!$sender_id) {
+            echo json_encode(['success' => false, 'message' => 'Not logged in']);
+            exit();
+        }
+
+        $success = MessageModel::sendToUser($sender_id, $receiver_id, 'Direct Message', $message);
+
+        if ($success) {
+            echo json_encode(['success' => true, 'message' => 'Reply sent successfully']);
+        } else {
+            echo json_encode(['success' => false, 'message' => 'Failed to send reply']);
+        }
         exit();
     }
 
-    /**
-     * Show global chat interface
-     */
     public function global()
     {
-        // Redirect to main messages page with global chat hash
         Redirect::to('message#load-global');
     }
 
-    /**
-     * Show the messenger interface
-     */
     public function index()
     {
         $user_id = Session::get('user_id');
 
-        // Get conversations and unread count
         $conversations = MessageModel::getConversations($user_id);
         $unread_count = MessageModel::getUnreadCount($user_id);
 
@@ -254,9 +205,6 @@ class MessageController extends Controller
         ));
     }
 
-    /**
-     * Show conversation with a specific user
-     */
     public function conversation()
     {
         $user_id = Session::get('user_id');
@@ -268,113 +216,90 @@ class MessageController extends Controller
             return;
         }
 
-        // Get user info for the other person
         $other_user = UserModel::getPublicProfileOfUser($other_user_id);
         if (!$other_user) {
             Redirect::to('message');
             return;
         }
 
-        // Redirect to main messages page with conversation hash
         Redirect::to('message#load-conversation-' . $other_user_id);
     }
 
-    /**
-     * Get conversation messages as JSON (AJAX endpoint)
-     */
     public function getConversationMessages()
     {
+        while (ob_get_level()) ob_end_clean();
+
         $user_id = Session::get('user_id');
         $url_parts = explode('/', trim($_SERVER['REQUEST_URI'], '/'));
         $other_user_id = isset($url_parts[2]) ? $url_parts[2] : null;
 
+        header('Content-Type: application/json');
+
         if (!$other_user_id) {
-            header('Content-Type: application/json');
             echo json_encode(['success' => false, 'message' => 'Missing user ID']);
-            return;
+            exit();
         }
 
-        // Get messages
         $messages = MessageModel::getMessagesWithUser($user_id, $other_user_id);
-        
-        // Mark messages as read when loading the conversation
         MessageModel::markAsRead($user_id, $other_user_id);
 
-        header('Content-Type: application/json');
         echo json_encode(['success' => true, 'messages' => $messages]);
+        exit();
     }
 
-    /**
-     * Get global chat messages as JSON (AJAX endpoint)
-     */
     public function getGlobalMessages()
     {
-        // Always return JSON for this endpoint
-        header('Content-Type: application/json');
+        while (ob_get_level()) ob_end_clean();
 
+        header('Content-Type: application/json');
         $messages = MessageModel::getGlobalMessages();
         echo json_encode(['success' => true, 'messages' => $messages]);
-        
-        // Stop any further execution
         exit();
     }
 
-    /**
-     * Send message to global chat
-     */
     public function sendToGlobal()
     {
-        // Always return JSON for this endpoint
+        while (ob_get_level()) ob_end_clean();
+
         header('Content-Type: application/json');
 
-        // Start output buffering to catch any accidental output
-        ob_start();
-        
-        try {
-            if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
-                echo json_encode(['success' => false, 'message' => 'Invalid request method']);
-                exit();
-            }
-            
-            $message = isset($_POST['message']) ? $_POST['message'] : null;
-            $sender_id = Session::get('user_id');
-            
-            if (!$message) {
-                echo json_encode(['success' => false, 'message' => 'Message is required']);
-                exit();
-            }
-            
-            if (!$sender_id) {
-                echo json_encode(['success' => false, 'message' => 'Not logged in']);
-                exit();
-            }
-            
-            $success = MessageModel::sendToGlobal($sender_id, $message);
-            
-            if ($success) {
-                echo json_encode(['success' => true, 'message' => 'Message sent to global chat']);
-            } else {
-                echo json_encode(['success' => false, 'message' => 'Failed to send message']);
-            }
-        } catch (Exception $e) {
-            // Catch any PHP errors
-            echo json_encode(['success' => false, 'message' => 'Server error: ' . $e->getMessage()]);
+        if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+            echo json_encode(['success' => false, 'message' => 'Invalid request method']);
+            exit();
         }
 
-        // Clean any output buffer and exit
-        ob_end_clean();
+        $message = isset($_POST['message']) ? $_POST['message'] : null;
+        $sender_id = Session::get('user_id');
+
+        if (!$message) {
+            echo json_encode(['success' => false, 'message' => 'Message is required']);
+            exit();
+        }
+
+        if (!$sender_id) {
+            echo json_encode(['success' => false, 'message' => 'Not logged in']);
+            exit();
+        }
+
+        $success = MessageModel::sendToGlobal($sender_id, $message);
+
+        if ($success) {
+            echo json_encode(['success' => true, 'message' => 'Message sent to global chat']);
+        } else {
+            echo json_encode(['success' => false, 'message' => 'Failed to send message']);
+        }
         exit();
     }
 
-    /**
-     * Get unread count as JSON
-     */
     public function unreadcount()
     {
+        while (ob_get_level()) ob_end_clean();
+
         $user_id = Session::get('user_id');
         $unread_count = MessageModel::getUnreadCount($user_id);
 
         header('Content-Type: application/json');
         echo json_encode(['unread_count' => $unread_count]);
+        exit();
     }
 }

application/controller/RegisterController.php

@@ -22,23 +22,25 @@ class RegisterController extends Controller
      */
     public function index()
     {
-        // only admins can access registration; reuse existing admin auth check
-        Auth::checkAdminAuthentication();
+        if (Session::userIsLoggedIn()) {
+            Redirect::to('index');
+            return;
+        }
         $this->View->render('register/index');
     }
 
-    /**
-     * Register page action
-     * POST-request after form submit
-     */
     public function register_action()
     {
-        // enforce admin-only for registration
-        Auth::checkAdminAuthentication();
+        if (Session::userIsLoggedIn()) {
+            Redirect::to('index');
+            return;
+        }
 
-        RegistrationModel::registerNewUser();
-
-        Redirect::to('admin/index');
+        if (RegistrationModel::registerNewUser()) {
+            Redirect::to('login');
+        } else {
+            Redirect::to('register');
+        }
     }
 
     /**

application/controller/SqlController.php

@@ -0,0 +1,181 @@
+<?php
+
+/**
+ * Class SqlController
+ * 
+ * Controller for executing raw SQL queries
+ */
+class SqlController extends Controller
+{
+    /**
+     * Construct this object by extending the basic Controller class
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        
+        // Only logged-in users can access the SQL console
+        Auth::checkAuthentication();
+    }
+
+    /**
+     * Show SQL console interface
+     * @param string $database_name
+     */
+    public function index($database_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+
+        $this->View->render('sql/index', array(
+            'database_name' => $database_name,
+            'databases' => DatabaseModel::getAllDatabases(),
+            'history' => SqlModel::getQueryHistory(Session::get('user_id'))
+        ));
+    }
+
+    /**
+     * Execute SQL query
+     */
+    public function execute()
+    {
+        $database_name = Request::post('database_name') ?: Config::get('DB_NAME');
+        $sql_query = Request::post('sql_query');
+        
+        if (empty($sql_query)) {
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                echo json_encode([
+                    'success' => false,
+                    'message' => 'SQL query cannot be empty'
+                ]);
+                return;
+            }
+            Redirect::to('sql');
+            return;
+        }
+
+        $result = SqlModel::executeQuery($database_name, $sql_query, Session::get('user_id'));
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            
+            if ($result['success']) {
+                echo json_encode([
+                    'success' => true,
+                    'message' => $result['message'],
+                    'result' => $result['result'],
+                    'affected_rows' => $result['affected_rows'],
+                    'execution_time' => $result['execution_time'],
+                    'query_type' => $result['query_type']
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false,
+                    'message' => $result['message'],
+                    'error' => $result['error']
+                ]);
+            }
+            return;
+        }
+        
+        // Non-AJAX: redirect with results in session
+        Session::set('sql_result', $result);
+        Redirect::to('sql/index/' . urlencode($database_name));
+    }
+
+    /**
+     * Get query history as JSON (AJAX endpoint)
+     */
+    public function getHistory()
+    {
+        $history = SqlModel::getQueryHistory(Session::get('user_id'));
+        
+        header('Content-Type: application/json');
+        echo json_encode([
+            'success' => true,
+            'history' => $history
+        ]);
+    }
+
+    /**
+     * Clear query history
+     */
+    public function clearHistory()
+    {
+        $success = SqlModel::clearQueryHistory(Session::get('user_id'));
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            
+            if ($success) {
+                echo json_encode([
+                    'success' => true,
+                    'message' => 'Query history cleared successfully'
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false,
+                    'message' => 'Failed to clear query history'
+                ]);
+            }
+            return;
+        }
+        
+        Redirect::to('sql');
+    }
+
+    /**
+     * Get database schema for autocomplete
+     * @param string $database_name
+     */
+    public function getSchema($database_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+
+        $schema = SqlModel::getDatabaseSchema($database_name);
+        
+        header('Content-Type: application/json');
+        echo json_encode([
+            'success' => true,
+            'schema' => $schema
+        ]);
+    }
+
+    /**
+     * Format SQL query (AJAX endpoint)
+     */
+    public function formatQuery()
+    {
+        $query = Request::post('query');
+        
+        if (empty($query)) {
+            header('Content-Type: application/json');
+            echo json_encode([
+                'success' => false,
+                'message' => 'Query cannot be empty'
+            ]);
+            return;
+        }
+
+        $formatted = SqlModel::formatQuery($query);
+        
+        header('Content-Type: application/json');
+        echo json_encode([
+            'success' => true,
+            'formatted' => $formatted
+        ]);
+    }
+
+    /**
+     * Check if the request is an AJAX request
+     */
+    private function isAjaxRequest()
+    {
+        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && 
+               strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
+    }
+}

application/controller/TableController.php

@@ -0,0 +1,248 @@
+<?php
+
+/**
+ * Class TableController
+ * 
+ * Controller for managing database tables
+ */
+class TableController extends Controller
+{
+    /**
+     * Construct this object by extending the basic Controller class
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        
+        // Only logged-in users can access the table manager
+        Auth::checkAuthentication();
+    }
+
+    /**
+     * Show table content with pagination
+     * @param string $database_name
+     * @param string $table_name
+     * @param int $page
+     */
+    public function show($database_name = null, $table_name = null, $page = 1)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+        
+        if (!$table_name) {
+            Redirect::to('database/show/' . urlencode($database_name));
+            return;
+        }
+
+        $page = (int)$page;
+        $per_page = 20;
+        
+        $this->View->render('table/show', array(
+            'database_name' => $database_name,
+            'table_name' => $table_name,
+            'columns' => TableModel::getTableColumns($database_name, $table_name),
+            'rows' => TableModel::getTableRows($database_name, $table_name, $page, $per_page),
+            'total_rows' => TableModel::getTableRowCount($database_name, $table_name),
+            'current_page' => $page,
+            'per_page' => $per_page,
+            'table_info' => TableModel::getTableInfo($database_name, $table_name)
+        ));
+    }
+
+    /**
+     * Create a new table
+     * @param string $database_name
+     */
+    public function create($database_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+
+        if (Request::post('submit_create_table')) {
+            $table_name = Request::post('table_name');
+            $columns = Request::post('columns');
+            
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                
+                if (TableModel::createTable($database_name, $table_name, $columns)) {
+                    echo json_encode([
+                        'success' => true,
+                        'message' => 'Table created successfully',
+                        'redirect' => Config::get('URL') . 'table/show/' . urlencode($database_name) . '/' . urlencode($table_name)
+                    ]);
+                } else {
+                    echo json_encode([
+                        'success' => false,
+                        'message' => 'Failed to create table'
+                    ]);
+                }
+                return;
+            }
+            
+            if (TableModel::createTable($database_name, $table_name, $columns)) {
+                Redirect::to('table/show/' . urlencode($database_name) . '/' . urlencode($table_name));
+            } else {
+                Redirect::to('database/show/' . urlencode($database_name));
+            }
+            return;
+        }
+
+        // Show create table form
+        $this->View->render('table/create', array(
+            'database_name' => $database_name
+        ));
+    }
+
+    /**
+     * Show table structure
+     * @param string $database_name
+     * @param string $table_name
+     */
+    public function structure($database_name = null, $table_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+        
+        if (!$table_name) {
+            Redirect::to('database/show/' . urlencode($database_name));
+            return;
+        }
+
+        $this->View->render('table/structure', array(
+            'database_name' => $database_name,
+            'table_name' => $table_name,
+            'columns' => TableModel::getTableColumns($database_name, $table_name),
+            'indexes' => TableModel::getTableIndexes($database_name, $table_name),
+            'table_info' => TableModel::getTableInfo($database_name, $table_name)
+        ));
+    }
+
+    /**
+     * Add a column to a table
+     * @param string $database_name
+     * @param string $table_name
+     */
+    public function addColumn($database_name = null, $table_name = null)
+    {
+        if (!$database_name) {
+            $database_name = Config::get('DB_NAME');
+        }
+        
+        if (!$table_name) {
+            Redirect::to('database/show/' . urlencode($database_name));
+            return;
+        }
+
+        if (Request::post('submit_add_column')) {
+            $column_name = Request::post('column_name');
+            $column_type = Request::post('column_type');
+            $column_null = Request::post('column_null');
+            $column_key = Request::post('column_key');
+            $column_default = Request::post('column_default');
+            $column_extra = Request::post('column_extra');
+            
+            if ($this->isAjaxRequest()) {
+                header('Content-Type: application/json');
+                
+                if (TableModel::addColumn($database_name, $table_name, $column_name, $column_type, $column_null, $column_key, $column_default, $column_extra)) {
+                    echo json_encode([
+                        'success' => true,
+                        'message' => 'Column added successfully',
+                        'reload' => true
+                    ]);
+                } else {
+                    echo json_encode([
+                        'success' => false,
+                        'message' => 'Failed to add column'
+                    ]);
+                }
+                return;
+            }
+            
+            if (TableModel::addColumn($database_name, $table_name, $column_name, $column_type, $column_null, $column_key, $column_default, $column_extra)) {
+                Redirect::to('table/structure/' . urlencode($database_name) . '/' . urlencode($table_name));
+            } else {
+                Redirect::to('table/structure/' . urlencode($database_name) . '/' . urlencode($table_name));
+            }
+            return;
+        }
+
+        // Show add column form
+        $this->View->render('table/add_column', array(
+            'database_name' => $database_name,
+            'table_name' => $table_name
+        ));
+    }
+
+    /**
+     * Drop a column from a table
+     * @param string $database_name
+     * @param string $table_name
+     * @param string $column_name
+     */
+    public function dropColumn($database_name, $table_name, $column_name)
+    {
+        $success = TableModel::dropColumn($database_name, $table_name, $column_name);
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            if ($success) {
+                echo json_encode([
+                    'success' => true,
+                    'message' => 'Column dropped successfully',
+                    'reload' => true
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false,
+                    'message' => 'Failed to drop column'
+                ]);
+            }
+            return;
+        }
+        
+        Redirect::to('table/structure/' . urlencode($database_name) . '/' . urlencode($table_name));
+    }
+
+    /**
+     * Delete a table
+     * @param string $database_name
+     * @param string $table_name
+     */
+    public function delete($database_name, $table_name)
+    {
+        $success = TableModel::deleteTable($database_name, $table_name);
+        
+        if ($this->isAjaxRequest()) {
+            header('Content-Type: application/json');
+            if ($success) {
+                echo json_encode([
+                    'success' => true,
+                    'message' => 'Table deleted successfully',
+                    'redirect' => Config::get('URL') . 'database/show/' . urlencode($database_name)
+                ]);
+            } else {
+                echo json_encode([
+                    'success' => false,
+                    'message' => 'Failed to delete table'
+                ]);
+            }
+            return;
+        }
+        
+        Redirect::to('database/show/' . urlencode($database_name));
+    }
+
+    /**
+     * Check if the request is an AJAX request
+     */
+    private function isAjaxRequest()
+    {
+        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && 
+               strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
+    }
+}

application/model/DatabaseModel.php

@@ -0,0 +1,183 @@
+<?php
+
+/**
+ * Class DatabaseModel
+ * 
+ * Model for database operations using PDO
+ */
+class DatabaseModel
+{
+    /**
+     * Get all databases on the server
+     * @return array
+     */
+    public static function getAllDatabases()
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SHOW DATABASES";
+        $query = $database->prepare($sql);
+        $query->execute();
+        
+        $databases = $query->fetchAll(PDO::FETCH_COLUMN);
+        
+        // Filter out system databases
+        $system_dbs = ['information_schema', 'performance_schema', 'mysql', 'sys'];
+        return array_diff($databases, $system_dbs);
+    }
+
+    /**
+     * Get all tables in a specific database
+     * @param string $database_name
+     * @return array
+     */
+    public static function getTablesInDatabase($database_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SHOW TABLES FROM " . $database_name;
+        $query = $database->prepare($sql);
+        $query->execute();
+        
+        return $query->fetchAll(PDO::FETCH_COLUMN);
+    }
+
+    /**
+     * Get detailed information about tables in a database
+     * @param string $database_name
+     * @return array
+     */
+    public static function getTableDetails($database_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        $tables = self::getTablesInDatabase($database_name);
+        $table_details = array();
+        
+        foreach ($tables as $table) {
+            $sql = "SHOW TABLE STATUS FROM " . $database_name . " LIKE :table_name";
+            $query = $database->prepare($sql);
+            $query->execute(array(':table_name' => $table));
+            
+            $details = $query->fetch(PDO::FETCH_ASSOC);
+            if ($details) {
+                $table_details[$table] = array(
+                    'engine' => $details['Engine'],
+                    'rows' => $details['Rows'],
+                    'data_size' => self::formatBytes($details['Data_length']),
+                    'index_size' => self::formatBytes($details['Index_length']),
+                    'total_size' => self::formatBytes($details['Data_length'] + $details['Index_length']),
+                    'collation' => $details['Collation'],
+                    'comment' => $details['Comment']
+                );
+            }
+        }
+        
+        return $table_details;
+    }
+
+    /**
+     * Get complete database structure (tables and columns)
+     * @param string $database_name
+     * @return array
+     */
+    public static function getDatabaseStructure($database_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        $structure = array();
+        $tables = self::getTablesInDatabase($database_name);
+        
+        foreach ($tables as $table) {
+            $sql = "DESCRIBE " . $database_name . "." . $table;
+            $query = $database->prepare($sql);
+            $query->execute();
+            
+            $columns = $query->fetchAll(PDO::FETCH_ASSOC);
+            $structure[$table] = $columns;
+        }
+        
+        return $structure;
+    }
+
+    /**
+     * Create a new database
+     * @param string $database_name
+     * @return bool
+     */
+    public static function createDatabase($database_name)
+    {
+        if (!$database_name || !preg_match('/^[a-zA-Z0-9_]+$/', $database_name)) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "CREATE DATABASE `" . $database_name . "` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci";
+            $query = $database->prepare($sql);
+            return $query->execute();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Delete a database
+     * @param string $database_name
+     * @return bool
+     */
+    public static function deleteDatabase($database_name)
+    {
+        if (!$database_name) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "DROP DATABASE `" . $database_name . "`";
+            $query = $database->prepare($sql);
+            return $query->execute();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Get table columns with details
+     * @param string $database_name
+     * @param string $table_name
+     * @return array
+     */
+    public static function getTableColumns($database_name, $table_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SHOW COLUMNS FROM " . $database_name . "." . $table_name;
+        $query = $database->prepare($sql);
+        $query->execute();
+        
+        return $query->fetchAll(PDO::FETCH_ASSOC);
+    }
+
+    /**
+     * Format bytes to human readable format
+     * @param int $bytes
+     * @return string
+     */
+    private static function formatBytes($bytes)
+    {
+        if ($bytes >= 1073741824) {
+            return number_format($bytes / 1073741824, 2) . ' GB';
+        } elseif ($bytes >= 1048576) {
+            return number_format($bytes / 1048576, 2) . ' MB';
+        } elseif ($bytes >= 1024) {
+            return number_format($bytes / 1024, 2) . ' KB';
+        } elseif ($bytes > 1) {
+            return $bytes . ' bytes';
+        } elseif ($bytes == 1) {
+            return '1 byte';
+        } else {
+            return '0 bytes';
+        }
+    }
+}

application/model/RegistrationModel.php

@@ -15,15 +15,13 @@ class RegistrationModel
      */
     public static function registerNewUser($isAdmin = false)
     {
-        // clean the input
         $user_name = strip_tags(Request::post('user_name'));
         $user_email = strip_tags(Request::post('user_email'));
-        // Use 'user_password' if provided (admin registration), otherwise 'user_password_new'
-        $user_password_new = $isAdmin ? Request::post('user_password_new') : Request::post('user_password_new');
-        $user_password_repeat = $user_password_new; // no repeat field
+        $user_password_new = Request::post('user_password_new');
+        $user_password_repeat = $user_password_new;
 
-        // validate using existing validators and messages
         $valid = true;
+        if (!self::validateRecaptcha()) { $valid = false; }
         if (!self::validateUserName($user_name)) { $valid = false; }
         if (!self::validateUserEmail($user_email, $user_email)) { $valid = false; }
         if (!self::validateUserPassword($user_password_new, $user_password_repeat)) { $valid = false; }
@@ -77,12 +75,35 @@ class RegistrationModel
         return $return;
     }
 
-    /**
-     * Validates the username
-     *
-     * @param $user_name
-     * @return bool
-     */
+    public static function validateRecaptcha()
+    {
+        $recaptcha_response = Request::post('g-recaptcha-response');
+
+        if (empty($recaptcha_response)) {
+            Session::add('feedback_negative', 'reCAPTCHA verification failed. Please try again.');
+            return false;
+        }
+
+        $secret_key = Config::get('RECAPTCHA_SECRET_KEY');
+        $verify_url = 'https://www.google.com/recaptcha/api/siteverify';
+
+        $response = file_get_contents($verify_url . '?secret=' . $secret_key . '&response=' . $recaptcha_response);
+        $response_data = json_decode($response);
+
+        if (!$response_data->success) {
+            Session::add('feedback_negative', 'reCAPTCHA verification failed. Please try again.');
+            return false;
+        }
+
+        // v3 returns a score from 0.0 to 1.0 (1.0 = likely human, 0.0 = likely bot)
+        if (isset($response_data->score) && $response_data->score < 0.5) {
+            Session::add('feedback_negative', 'Registration blocked due to suspicious activity.');
+            return false;
+        }
+
+        return true;
+    }
+
     public static function validateUserName($user_name)
     {
         if (empty($user_name)) {
@@ -90,7 +111,6 @@ class RegistrationModel
             return false;
         }
 
-        // if username is too short (2), too long (64) or does not fit the pattern (aZ09)
         if (!preg_match('/^[a-zA-Z0-9]{2,64}$/', $user_name)) {
             Session::add('feedback_negative', Text::get('FEEDBACK_USERNAME_DOES_NOT_FIT_PATTERN'));
             return false;

application/model/SqlModel.php

@@ -0,0 +1,289 @@
+<?php
+
+/**
+ * Class SqlModel
+ * 
+ * Model for executing raw SQL queries
+ */
+class SqlModel
+{
+    /**
+     * Execute a SQL query and return the result
+     * @param string $database_name
+     * @param string $sql_query
+     * @param int $user_id
+     * @return array
+     */
+    public static function executeQuery($database_name, $sql_query, $user_id = null)
+    {
+        $start_time = microtime(true);
+        
+        // Save query to history if user_id is provided
+        if ($user_id) {
+            self::saveQueryToHistory($user_id, $database_name, $sql_query);
+        }
+        
+        try {
+            $database = DatabaseFactory::getFactory()->getConnection();
+            
+            // Determine query type
+            $query_type = self::getQueryType($sql_query);
+            
+            // Execute the query
+            $query = $database->prepare($sql_query);
+            $query->execute();
+            
+            $execution_time = number_format((microtime(true) - $start_time) * 1000, 2);
+            
+            // Handle different query types
+            if ($query_type === 'SELECT' || $query_type === 'SHOW' || $query_type === 'DESCRIBE' || $query_type === 'EXPLAIN') {
+                // Return result set
+                $result = $query->fetchAll(PDO::FETCH_ASSOC);
+                $message = 'Query executed successfully. ' . count($result) . ' rows returned.';
+                
+                return array(
+                    'success' => true,
+                    'message' => $message,
+                    'result' => $result,
+                    'query_type' => $query_type,
+                    'execution_time' => $execution_time,
+                    'affected_rows' => 0
+                );
+            } else {
+                // Return affected rows count
+                $affected_rows = $query->rowCount();
+                $message = 'Query executed successfully. ' . $affected_rows . ' row(s) affected.';
+                
+                return array(
+                    'success' => true,
+                    'message' => $message,
+                    'query_type' => $query_type,
+                    'execution_time' => $execution_time,
+                    'affected_rows' => $affected_rows,
+                    'result' => array()
+                );
+            }
+        } catch (PDOException $e) {
+            return array(
+                'success' => false,
+                'message' => 'Query execution failed',
+                'error' => $e->getMessage(),
+                'query_type' => 'ERROR',
+                'execution_time' => 0,
+                'result' => array()
+            );
+        }
+    }
+
+    /**
+     * Save query to history
+     * @param int $user_id
+     * @param string $database_name
+     * @param string $sql_query
+     * @return bool
+     */
+    private static function saveQueryToHistory($user_id, $database_name, $sql_query)
+    {
+        // Create history table if it doesn't exist
+        self::createHistoryTableIfNotExists();
+        
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "INSERT INTO sql_query_history (user_id, database_name, query_text, query_timestamp) 
+                    VALUES (:user_id, :database_name, :query_text, NOW())";
+            $query = $database->prepare($sql);
+            $query->execute(array(
+                ':user_id' => $user_id,
+                ':database_name' => $database_name,
+                ':query_text' => $sql_query
+            ));
+            
+            // Keep only last 50 queries per user
+            $sql = "DELETE FROM sql_query_history 
+                    WHERE user_id = :user_id 
+                    AND id NOT IN (
+                        SELECT id FROM (
+                            SELECT id FROM sql_query_history 
+                            WHERE user_id = :user_id 
+                            ORDER BY query_timestamp DESC 
+                            LIMIT 50
+                        ) AS temp
+                    )";
+            $query = $database->prepare($sql);
+            $query->execute(array(':user_id' => $user_id));
+            
+            return true;
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Create SQL query history table if it doesn't exist
+     */
+    private static function createHistoryTableIfNotExists()
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "CREATE TABLE IF NOT EXISTS sql_query_history (
+                        id INT AUTO_INCREMENT PRIMARY KEY,
+                        user_id INT NOT NULL,
+                        database_name VARCHAR(64) NOT NULL,
+                        query_text TEXT NOT NULL,
+                        query_timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                        INDEX idx_user_timestamp (user_id, query_timestamp)
+                    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
+            $database->exec($sql);
+        } catch (PDOException $e) {
+            // Table creation failed
+        }
+    }
+
+    /**
+     * Get query history for a user
+     * @param int $user_id
+     * @param int $limit
+     * @return array
+     */
+    public static function getQueryHistory($user_id, $limit = 50)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "SELECT database_name, query_text, query_timestamp 
+                    FROM sql_query_history 
+                    WHERE user_id = :user_id 
+                    ORDER BY query_timestamp DESC 
+                    LIMIT :limit";
+            $query = $database->prepare($sql);
+            $query->bindValue(':user_id', $user_id, PDO::PARAM_INT);
+            $query->bindValue(':limit', $limit, PDO::PARAM_INT);
+            $query->execute();
+            
+            return $query->fetchAll(PDO::FETCH_ASSOC);
+        } catch (PDOException $e) {
+            return array();
+        }
+    }
+
+    /**
+     * Clear query history for a user
+     * @param int $user_id
+     * @return bool
+     */
+    public static function clearQueryHistory($user_id)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "DELETE FROM sql_query_history WHERE user_id = :user_id";
+            $query = $database->prepare($sql);
+            return $query->execute(array(':user_id' => $user_id));
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Get database schema for autocomplete
+     * @param string $database_name
+     * @return array
+     */
+    public static function getDatabaseSchema($database_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        $schema = array();
+        
+        try {
+            // Get all tables
+            $sql = "SHOW TABLES FROM " . $database_name;
+            $query = $database->prepare($sql);
+            $query->execute();
+            $tables = $query->fetchAll(PDO::FETCH_COLUMN);
+            
+            foreach ($tables as $table) {
+                // Get columns for each table
+                $sql = "SHOW COLUMNS FROM " . $database_name . "." . $table;
+                $query = $database->prepare($sql);
+                $query->execute();
+                $columns = $query->fetchAll(PDO::FETCH_ASSOC);
+                
+                $schema[$table] = array_map(function($column) {
+                    return $column['Field'];
+                }, $columns);
+            }
+            
+            return $schema;
+        } catch (PDOException $e) {
+            return array();
+        }
+    }
+
+    /**
+     * Format SQL query (basic formatting)
+     * @param string $query
+     * @return string
+     */
+    public static function formatQuery($query)
+    {
+        // Basic SQL formatting
+        $query = trim($query);
+        
+        // Uppercase SQL keywords
+        $keywords = array(
+            'SELECT', 'FROM', 'WHERE', 'AND', 'OR', 'ORDER BY', 'GROUP BY', 
+            'HAVING', 'LIMIT', 'OFFSET', 'INSERT', 'INTO', 'VALUES', 
+            'UPDATE', 'SET', 'DELETE', 'CREATE', 'TABLE', 'ALTER', 'DROP',
+            'INDEX', 'PRIMARY KEY', 'FOREIGN KEY', 'REFERENCES', 'JOIN', 
+            'INNER JOIN', 'LEFT JOIN', 'RIGHT JOIN', 'ON', 'AS', 'DISTINCT',
+            'COUNT', 'SUM', 'AVG', 'MIN', 'MAX', 'EXISTS', 'IN', 'BETWEEN',
+            'LIKE', 'IS NULL', 'IS NOT NULL', 'UNION', 'ALL'
+        );
+        
+        foreach ($keywords as $keyword) {
+            $query = preg_replace('/\b' . preg_quote($keyword) . '\b/i', $keyword, $query);
+        }
+        
+        // Add line breaks for better readability
+        $query = preg_replace('/\b(FROM|WHERE|GROUP BY|ORDER BY|HAVING|LIMIT|UNION)\b/', "\n$1", $query);
+        $query = preg_replace('/,\s*(\w)/', ",\n    $1", $query);
+        
+        return $query;
+    }
+
+    /**
+     * Determine the type of SQL query
+     * @param string $sql_query
+     * @return string
+     */
+    private static function getQueryType($sql_query)
+    {
+        $query = strtoupper(trim($sql_query));
+        
+        if (strpos($query, 'SELECT') === 0) {
+            return 'SELECT';
+        } elseif (strpos($query, 'INSERT') === 0) {
+            return 'INSERT';
+        } elseif (strpos($query, 'UPDATE') === 0) {
+            return 'UPDATE';
+        } elseif (strpos($query, 'DELETE') === 0) {
+            return 'DELETE';
+        } elseif (strpos($query, 'CREATE') === 0) {
+            return 'CREATE';
+        } elseif (strpos($query, 'ALTER') === 0) {
+            return 'ALTER';
+        } elseif (strpos($query, 'DROP') === 0) {
+            return 'DROP';
+        } elseif (strpos($query, 'SHOW') === 0) {
+            return 'SHOW';
+        } elseif (strpos($query, 'DESCRIBE') === 0) {
+            return 'DESCRIBE';
+        } elseif (strpos($query, 'EXPLAIN') === 0) {
+            return 'EXPLAIN';
+        } else {
+            return 'OTHER';
+        }
+    }
+}

application/model/TableModel.php

@@ -0,0 +1,284 @@
+<?php
+
+/**
+ * Class TableModel
+ * 
+ * Model for table operations using PDO
+ */
+class TableModel
+{
+    /**
+     * Get table rows with pagination
+     * @param string $database_name
+     * @param string $table_name
+     * @param int $page
+     * @param int $per_page
+     * @return array
+     */
+    public static function getTableRows($database_name, $table_name, $page = 1, $per_page = 20)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $offset = ($page - 1) * $per_page;
+        
+        $sql = "SELECT * FROM `" . $database_name . "`.`" . $table_name . "` LIMIT :offset, :per_page";
+        $query = $database->prepare($sql);
+        $query->bindParam(':offset', $offset, PDO::PARAM_INT);
+        $query->bindParam(':per_page', $per_page, PDO::PARAM_INT);
+        $query->execute();
+        
+        return $query->fetchAll(PDO::FETCH_ASSOC);
+    }
+
+    /**
+     * Get total number of rows in a table
+     * @param string $database_name
+     * @param string $table_name
+     * @return int
+     */
+    public static function getTableRowCount($database_name, $table_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SELECT COUNT(*) as count FROM `" . $database_name . "`.`" . $table_name . "`";
+        $query = $database->prepare($sql);
+        $query->execute();
+        
+        $result = $query->fetch(PDO::FETCH_ASSOC);
+        return (int)$result['count'];
+    }
+
+    /**
+     * Get table column information
+     * @param string $database_name
+     * @param string $table_name
+     * @return array
+     */
+    public static function getTableColumns($database_name, $table_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SHOW COLUMNS FROM `" . $database_name . "`.`" . $table_name . "`";
+        $query = $database->prepare($sql);
+        $query->execute();
+        
+        return $query->fetchAll(PDO::FETCH_ASSOC);
+    }
+
+    /**
+     * Get table indexes
+     * @param string $database_name
+     * @param string $table_name
+     * @return array
+     */
+    public static function getTableIndexes($database_name, $table_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SHOW INDEX FROM `" . $database_name . "`.`" . $table_name . "`";
+        $query = $database->prepare($sql);
+        $query->execute();
+        
+        return $query->fetchAll(PDO::FETCH_ASSOC);
+    }
+
+    /**
+     * Get table information
+     * @param string $database_name
+     * @param string $table_name
+     * @return array
+     */
+    public static function getTableInfo($database_name, $table_name)
+    {
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $sql = "SHOW TABLE STATUS FROM `" . $database_name . "` LIKE :table_name";
+        $query = $database->prepare($sql);
+        $query->execute(array(':table_name' => $table_name));
+        
+        $result = $query->fetch(PDO::FETCH_ASSOC);
+        
+        if ($result) {
+            return array(
+                'engine' => $result['Engine'],
+                'rows' => $result['Rows'],
+                'data_size' => self::formatBytes($result['Data_length']),
+                'index_size' => self::formatBytes($result['Index_length']),
+                'total_size' => self::formatBytes($result['Data_length'] + $result['Index_length']),
+                'collation' => $result['Collation'],
+                'comment' => $result['Comment'],
+                'auto_increment' => $result['Auto_increment'],
+                'create_time' => $result['Create_time'],
+                'update_time' => $result['Update_time']
+            );
+        }
+        
+        return array();
+    }
+
+    /**
+     * Create a new table
+     * @param string $database_name
+     * @param string $table_name
+     * @param array $columns
+     * @return bool
+     */
+    public static function createTable($database_name, $table_name, $columns)
+    {
+        if (!$database_name || !$table_name || empty($columns)) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        // Build column definitions
+        $column_definitions = array();
+        foreach ($columns as $column) {
+            $definition = "`" . $column['name'] . "` " . $column['type'];
+            
+            if (isset($column['null']) && $column['null'] === 'NO') {
+                $definition .= " NOT NULL";
+            }
+            
+            if (isset($column['default']) && $column['default'] !== '') {
+                $definition .= " DEFAULT '" . $column['default'] . "'";
+            }
+            
+            if (isset($column['extra']) && $column['extra'] === 'auto_increment') {
+                $definition .= " AUTO_INCREMENT";
+            }
+            
+            $column_definitions[] = $definition;
+        }
+        
+        // Handle primary key
+        foreach ($columns as $column) {
+            if (isset($column['key']) && $column['key'] === 'PRI') {
+                $column_definitions[] = "PRIMARY KEY (`" . $column['name'] . "`)";
+                break;
+            }
+        }
+        
+        $columns_sql = implode(', ', $column_definitions);
+        
+        try {
+            $sql = "CREATE TABLE `" . $database_name . "`.`" . $table_name . "` (" . $columns_sql . ") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
+            $query = $database->prepare($sql);
+            return $query->execute();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Delete a table
+     * @param string $database_name
+     * @param string $table_name
+     * @return bool
+     */
+    public static function deleteTable($database_name, $table_name)
+    {
+        if (!$database_name || !$table_name) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "DROP TABLE `" . $database_name . "`.`" . $table_name . "`";
+            $query = $database->prepare($sql);
+            return $query->execute();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Add a column to a table
+     * @param string $database_name
+     * @param string $table_name
+     * @param string $column_name
+     * @param string $column_type
+     * @param string $column_null
+     * @param string $column_key
+     * @param string $column_default
+     * @param string $column_extra
+     * @return bool
+     */
+    public static function addColumn($database_name, $table_name, $column_name, $column_type, $column_null, $column_key, $column_default, $column_extra)
+    {
+        if (!$database_name || !$table_name || !$column_name || !$column_type) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        $definition = "`" . $column_name . "` " . $column_type;
+        
+        if ($column_null === 'NO') {
+            $definition .= " NOT NULL";
+        }
+        
+        if ($column_default !== '') {
+            $definition .= " DEFAULT '" . $column_default . "'";
+        }
+        
+        if ($column_extra === 'auto_increment') {
+            $definition .= " AUTO_INCREMENT";
+        }
+        
+        try {
+            $sql = "ALTER TABLE `" . $database_name . "`.`" . $table_name . "` ADD " . $definition;
+            $query = $database->prepare($sql);
+            return $query->execute();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Drop a column from a table
+     * @param string $database_name
+     * @param string $table_name
+     * @param string $column_name
+     * @return bool
+     */
+    public static function dropColumn($database_name, $table_name, $column_name)
+    {
+        if (!$database_name || !$table_name || !$column_name) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+        
+        try {
+            $sql = "ALTER TABLE `" . $database_name . "`.`" . $table_name . "` DROP COLUMN `" . $column_name . "`";
+            $query = $database->prepare($sql);
+            return $query->execute();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Format bytes to human readable format
+     * @param int $bytes
+     * @return string
+     */
+    private static function formatBytes($bytes)
+    {
+        if ($bytes >= 1073741824) {
+            return number_format($bytes / 1073741824, 2) . ' GB';
+        } elseif ($bytes >= 1048576) {
+            return number_format($bytes / 1048576, 2) . ' MB';
+        } elseif ($bytes >= 1024) {
+            return number_format($bytes / 1024, 2) . ' KB';
+        } elseif ($bytes > 1) {
+            return $bytes . ' bytes';
+        } elseif ($bytes == 1) {
+            return '1 byte';
+        } else {
+            return '0 bytes';
+        }
+    }
+}

application/view/login/index.php

@@ -37,6 +37,9 @@
                 <div class="link-forgot-my-password">
                     <a href="<?php echo Config::get('URL'); ?>login/requestPasswordReset">I forgot my password</a>
                 </div>
+                <div class="link-register" style="margin-top: 15px;">
+                    <a href="<?php echo Config::get('URL'); ?>register" class="button">Register new account</a>
+                </div>
             </div>
         </div>
     </div>

application/view/message/index.php

@@ -2,98 +2,82 @@
     <h1>Messenger</h1>
     <?php $this->renderFeedbackMessages(); ?>
 
-    <!-- Add user ID for JavaScript -->
     <meta name="user-id" content="<?= Session::get('user_id') ?>">
     
     <script src="<?= Config::get('URL') ?>public/js/messaging.js"></script>
 
-    <div style="display: flex; gap: 20px; margin-top: 20px;">
-        <!-- Left Sidebar -->
+    <div class="messenger-container">
         <div style="width: 300px;" class="messaging-sidebar">
-            <div style="margin-bottom: 20px; padding: 15px; background: #f5f5f5; border: 1px solid #ddd;">
-                <h3 style="margin: 0 0 15px 0;">Channels</h3>
-                <div onclick="loadGlobalChat()" style="display: block; padding: 10px; margin-bottom: 8px; background: white; border: 1px solid #ddd; text-decoration: none; color: #333; cursor: pointer; transition: background-color 0.2s;" onmouseover="this.style.backgroundColor='#f0f0f0'" onmouseout="this.style.backgroundColor='white'" id="global-chat-link">
-                    <div style="display: flex; align-items: center; gap: 8px;">
-                        <span style="color: #2196F3;">#</span>
+            <div class="sidebar-section">
+                <h3>Channels</h3>
+                <div onclick="loadGlobalChat()" class="chat-item" id="global-chat-link">
+                    <div class="chat-item-title">
+                        <span class="chat-item-icon" style="color: #2196F3;">#</span>
                         <strong>Global Chat</strong>
                     </div>
-                    <small style="color: #666; font-size: 11px;">Public chatroom</small>
+                    <div class="chat-item-meta">Public chatroom</div>
                 </div>
             </div>
 
-            <div style="margin-bottom: 20px; padding: 15px; background: #f5f5f5; border: 1px solid #ddd;">
-                <h3 style="margin: 0 0 15px 0;">Direct Messages</h3>
+            <div class="sidebar-section">
+                <h3>Direct Messages</h3>
                 <?php if (empty($this->conversations)): ?>
-                    <p style="text-align: center; padding: 20px; background: white; border: 1px solid #ddd;">No conversations yet</p>
+                    <p class="chat-item" style="text-align: center; cursor: default;">No conversations yet</p>
                 <?php else: ?>
                     <?php foreach ($this->conversations as $conv): ?>
                         <div onclick="loadConversation(<?= $conv->other_user_id ?>, '<?= htmlspecialchars(addslashes($conv->user_name)) ?>')"
-                             style="display: block; padding: 10px; margin-bottom: 8px; background: white; border: 1px solid #ddd; text-decoration: none; color: #333; cursor: pointer; transition: background-color 0.2s;" 
-                             onmouseover="this.style.backgroundColor='#f0f0f0'" 
-                             onmouseout="this.style.backgroundColor='white'"
+                             class="chat-item"
                              id="conversation-<?= $conv->other_user_id ?>">
-                            <div style="display: flex; justify-content: space-between; align-items: center;">
-                                <div style="display: flex; align-items: center; gap: 8px;">
-                                    <span style="color: #4CAF50;">@</span>
+                            <div class="chat-item-header">
+                                <div class="chat-item-title">
+                                    <span class="chat-item-icon" style="color: #4CAF50;">@</span>
                                     <strong><?= htmlspecialchars($conv->user_name) ?></strong>
                                 </div>
                                 <?php if ($conv->unread_count > 0): ?>
-                                    <span style="background: #f44336; color: white; padding: 2px 6px; border-radius: 10px; font-size: 11px;">
-                                        <?= $conv->unread_count ?>
-                                    </span>
+                                    <span class="unread-badge"><?= $conv->unread_count ?></span>
                                 <?php endif; ?>
                             </div>
-                            <small style="color: #666; font-size: 11px;"><?= date('M j, H:i', strtotime($conv->last_message_time)) ?></small>
+                            <div class="chat-item-meta"><?= date('M j, H:i', strtotime($conv->last_message_time)) ?></div>
                         </div>
                     <?php endforeach; ?>
                 <?php endif; ?>
             </div>
 
-            <div style="padding: 15px; background: #f5f5f5; border: 1px solid #ddd;">
-                <h3 style="margin: 0 0 15px 0;">New Message</h3>
-                <form action="<?= Config::get('URL') ?>message/send" method="post" id="message-form">
-                    <select name="receiver_id" style="width: 100%; padding: 8px; margin-bottom: 8px; border: 1px solid #ddd;" required>
+            <div class="sidebar-section">
+                <h3>New Message</h3>
+                <form action="<?= Config::get('URL') ?>message/send" method="post" id="message-form" class="new-message-form">
+                    <select name="receiver_id" required>
                         <option value="">Select user</option>
                         <?php foreach ($this->all_users as $user): ?>
                             <option value="<?= $user->user_id ?>"><?= htmlspecialchars($user->user_name) ?></option>
                         <?php endforeach; ?>
                     </select>
-                    <input type="text" name="subject" placeholder="Subject" style="width: 100%; padding: 8px; margin-bottom: 8px; border: 1px solid #ddd; max-width: 250px;" required>
-                    <textarea name="message" placeholder="Message" style="width: 100%; padding: 8px; margin-bottom: 8px; border: 1px solid #ddd; height: 60px; resize: vertical; max-width: 250px;" required></textarea>
-                    <button type="submit" class="button">Send Message</button>
+                    <input type="hidden" name="subject" value="Direct Message">
+                    <textarea name="message" placeholder="Type your message..." required></textarea>
+                    <button type="submit" class="button" style="width: 100%;">Send Message</button>
                 </form>
             </div>
         </div>
 
-        <!-- Main Chat Area -->
-        <div style="flex: 1; border: 1px solid #ddd; background: white;" class="chat-main-area">
-            <div id="chat-content" style="height: 700px; min-height: 700px; display: flex; flex-direction: column;">
-                <!-- Default state -->
-                <div id="default-state" style="flex: 1; display: flex; align-items: center; justify-content: center; background: #f9f9f9;">
-                    <div style="text-align: center; padding: 60px 20px; color: #666;">
-                        <h3 style="margin: 0 0 10px 0;">Welcome to Messenger</h3>
+        <div style="flex: 1;" class="chat-main-area">
+            <div id="chat-content">
+                <div id="default-state">
+                    <div class="default-welcome">
+                        <h3>Welcome to Messenger</h3>
                         <p>Select Global Chat or a conversation to start messaging</p>
-                        <small style="color: #999;">Click on any channel or conversation in the sidebar</small>
+                        <small>Click on any channel or conversation in the sidebar</small>
                     </div>
                 </div>
 
-                <!-- Chat interface (hidden by default) -->
-                <div id="chat-interface" style="display: none; flex: 1; flex-direction: column;">
-                    <!-- Chat header -->
-                    <div id="chat-header" style="padding: 15px; border-bottom: 1px solid #ddd; background: #f5f5f5; display: flex; justify-content: space-between; align-items: center;">
+                <div id="chat-interface">
+                    <div id="chat-header">
                         <div id="chat-title"></div>
                         <div id="chat-actions"></div>
                     </div>
 
-                    <!-- Messages container -->
-                    <div id="messages-container" style="flex: 1; padding: 20px; overflow-y: auto;">
-                        <!-- Messages will be loaded here -->
-                    </div>
+                    <div id="messages-container"></div>
 
-                    <!-- Message input -->
-                    <div id="message-input-area" style="padding: 15px; border-top: 1px solid #ddd; background: #f5f5f5;">
-                        <!-- Message input will be loaded here -->
-                    </div>
+                    <div id="message-input-area"></div>
                 </div>
             </div>
         </div>
@@ -101,40 +85,168 @@
 </div>
 
 <style>
+.messenger-container {
+    display: flex;
+    gap: 20px;
+    margin-top: 20px;
+    align-items: flex-start;
+}
+
 .messaging-sidebar {
-    height: fit-content;
+    width: 300px;
+    flex-shrink: 0;
+}
+
+.sidebar-section {
+    margin-bottom: 20px;
+    padding: 15px;
+    background: linear-gradient(135deg, #f8f9fa 0%, #f0f2f5 100%);
+    border: 1px solid #e0e0e0;
+    border-radius: 8px;
+}
+
+.sidebar-section h3 {
+    margin: 0 0 15px 0;
+    font-size: 14px;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    color: #555;
 }
 
 .chat-main-area {
-    height: auto;
+    flex: 1;
+    border-radius: 8px;
+    overflow: hidden;
+    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
+    border: 1px solid #e0e0e0;
+    background: white;
+}
+
+#chat-content {
+    height: 600px;
+    display: flex;
+    flex-direction: column;
+}
+
+#default-state {
+    flex: 1;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background: linear-gradient(180deg, #f5f7fa 0%, #fafbfc 100%);
+}
+
+#chat-interface {
+    display: none;
+    flex-direction: column;
+    height: 100%;
+}
+
+#chat-header {
+    padding: 15px;
+    border-bottom: 1px solid #e0e0e0;
+    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    flex-shrink: 0;
+}
+
+#message-input-area {
+    padding: 15px;
+    border-top: 1px solid #e0e0e0;
+    background: linear-gradient(180deg, #fff 0%, #f8f9fa 100%);
+    flex-shrink: 0;
 }
 
 #messages-container {
-    background: #fafafa;
+    flex: 1;
+    overflow-y: auto;
+    padding: 20px;
+    background: linear-gradient(180deg, #f5f7fa 0%, #fafbfc 100%);
     scroll-behavior: smooth;
 }
 
+.chat-item {
+    display: block;
+    padding: 12px;
+    margin-bottom: 8px;
+    background: white;
+    border: 1px solid #e0e0e0;
+    border-radius: 8px;
+    text-decoration: none;
+    color: #333;
+    cursor: pointer;
+    transition: all 0.2s ease;
+}
+
+.chat-item:hover {
+    background: #f5f8ff;
+    border-color: #2196F3;
+    transform: translateX(3px);
+}
+
+.chat-item.active {
+    background: #e3f2fd;
+    border-color: #2196F3;
+    box-shadow: 0 2px 4px rgba(33,150,243,0.2);
+}
+
+.chat-item-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.chat-item-title {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.chat-item-icon {
+    font-size: 16px;
+    width: 24px;
+    text-align: center;
+}
+
+.unread-badge {
+    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
+    color: white;
+    padding: 2px 8px;
+    border-radius: 12px;
+    font-size: 11px;
+    font-weight: 600;
+}
+
+.chat-item-meta {
+    font-size: 11px;
+    color: #888;
+    margin-top: 4px;
+}
+
 .message-bubble {
     display: inline-block;
     max-width: 70%;
-    padding: 10px 15px;
+    padding: 12px 16px;
     border-radius: 18px;
-    margin-bottom: 8px;
+    margin-bottom: 4px;
     word-wrap: break-word;
-    line-height: 1.4;
+    line-height: 1.5;
+    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
 }
 
 .message-bubble.sent {
-    background: #2196F3;
+    background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
     color: white;
-    border-bottom-right-radius: 4px;
+    border-bottom-right-radius: 6px;
 }
 
 .message-bubble.received {
     background: white;
     color: #333;
-    border: 1px solid #e0e0e0;
-    border-bottom-left-radius: 4px;
+    border: 1px solid #e8e8e8;
+    border-bottom-left-radius: 6px;
 }
 
 .message-time {
@@ -144,7 +256,7 @@
 }
 
 .message-row {
-    margin-bottom: 15px;
+    margin-bottom: 16px;
     display: flex;
 }
 
@@ -157,11 +269,18 @@
 }
 
 .global-message {
-    margin-bottom: 20px;
-    padding: 15px;
+    margin-bottom: 16px;
+    padding: 16px;
     background: white;
     border-radius: 12px;
-    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
+    border: 1px solid #eee;
+    transition: transform 0.2s ease;
+}
+
+.global-message:hover {
+    transform: translateY(-1px);
+    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
 }
 
 .global-message-header {
@@ -169,18 +288,116 @@
     justify-content: space-between;
     align-items: center;
     margin-bottom: 10px;
+    padding-bottom: 8px;
+    border-bottom: 1px solid #f0f0f0;
+}
+
+.global-message-sender {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.sender-avatar {
+    width: 32px;
+    height: 32px;
+    border-radius: 50%;
+    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: white;
+    font-weight: 600;
+    font-size: 14px;
 }
 
 .global-message-bubble {
-    color: #333;
-    line-height: 1.5;
+    color: #444;
+    line-height: 1.6;
     word-wrap: break-word;
 }
 
+.message-input {
+    flex: 1;
+    padding: 12px 18px;
+    border: 2px solid #e0e0e0;
+    border-radius: 25px;
+    font-size: 14px;
+    transition: border-color 0.2s ease, box-shadow 0.2s ease;
+}
+
+.message-input:focus {
+    outline: none;
+    border-color: #2196F3;
+    box-shadow: 0 0 0 3px rgba(33,150,243,0.1);
+}
+
+.send-button {
+    border-radius: 25px;
+    padding: 12px 24px;
+    font-weight: 600;
+    transition: all 0.2s ease;
+}
+
+.send-button:hover {
+    transform: scale(1.02);
+}
+
+.default-welcome {
+    text-align: center;
+    padding: 80px 20px;
+    color: #666;
+}
+
+.default-welcome h3 {
+    margin: 0 0 12px 0;
+    color: #333;
+    font-size: 20px;
+}
+
+.default-welcome p {
+    margin: 0 0 8px 0;
+    color: #666;
+}
+
+.default-welcome small {
+    color: #999;
+}
+
+.new-message-form select,
+.new-message-form textarea {
+    width: 100%;
+    padding: 10px 12px;
+    margin-bottom: 10px;
+    border: 2px solid #e0e0e0;
+    border-radius: 8px;
+    font-size: 14px;
+    box-sizing: border-box;
+    transition: border-color 0.2s ease;
+}
+
+.new-message-form select:focus,
+.new-message-form textarea:focus {
+    outline: none;
+    border-color: #2196F3;
+}
+
+.new-message-form textarea {
+    height: 80px;
+    resize: vertical;
+}
+
 @media (max-width: 768px) {
-    .chat-main-area {
+    .messenger-container {
+        flex-direction: column;
+    }
+
+    .messaging-sidebar {
+        width: 100% !important;
+    }
+
+    #chat-content {
         height: 500px;
-        margin-top: 20px;
     }
 
     .message-bubble {
@@ -193,32 +410,26 @@
 let currentChatType = null;
 let currentChatId = null;
 let messagePollingInterval = null;
+let isFirstLoad = true;
 
-// Function to scroll messages container to bottom
 function scrollToBottom() {
     const container = document.getElementById('messages-container');
     if (container) {
-        // Small timeout to ensure content is rendered
         setTimeout(() => {
             container.scrollTop = container.scrollHeight;
         }, 100);
     }
 }
 
-// Handle DOM ready event
 document.addEventListener('DOMContentLoaded', function() {
-    // Check URL hash for auto-loading chats
     const hash = window.location.hash.substring(1);
 
     if (hash === 'load-global') {
-        // Load global chat
         setTimeout(() => loadGlobalChat(), 100);
     } else if (hash.startsWith('load-conversation-')) {
-        // Load conversation
         const userId = hash.split('-')[2];
         if (userId) {
             setTimeout(() => {
-                // Get user name from the conversation list
                 const conversationEl = document.querySelector('#conversation-' + userId);
                 if (conversationEl) {
                     const userName = conversationEl.querySelector('strong').textContent;
@@ -232,12 +443,11 @@ document.addEventListener('DOMContentLoaded', function() {
 function loadGlobalChat() {
     currentChatType = 'global';
     currentChatId = 'global';
+    isFirstLoad = true;
 
-    // Hide default state, show chat interface
     document.getElementById('default-state').style.display = 'none';
     document.getElementById('chat-interface').style.display = 'flex';
 
-    // Update header
     document.getElementById('chat-title').innerHTML = `
         <div style="display: flex; align-items: center; gap: 8px;">
             <span style="color: #2196F3; font-size: 18px;">#</span>
@@ -252,33 +462,21 @@ function loadGlobalChat() {
         </span>
     `;
 
-    // Highlight active chat
     highlightActiveChat('global');
-    
-    // Load messages
     loadGlobalMessages();
-    
-    // Scroll to bottom after loading
-    setTimeout(() => {
-        scrollToBottom();
-    }, 300);
-    
-    // Setup message input
+    setTimeout(scrollToBottom, 300);
     setupGlobalMessageInput();
-    
-    // Start polling for new messages
     startMessagePolling();
 }
 
 function loadConversation(userId, userName) {
     currentChatType = 'conversation';
     currentChatId = userId;
+    isFirstLoad = true;
 
-    // Hide default state, show chat interface
     document.getElementById('default-state').style.display = 'none';
     document.getElementById('chat-interface').style.display = 'flex';
 
-    // Update header
     document.getElementById('chat-title').innerHTML = `
         <div style="display: flex; align-items: center; gap: 8px;">
             <span style="color: #4CAF50; font-size: 18px;">@</span>
@@ -293,88 +491,80 @@ function loadConversation(userId, userName) {
         </span>
     `;
 
-    // Highlight active chat
     highlightActiveChat(userId);
-    
-    // Load messages
     loadConversationMessages(userId);
-    
-    // Scroll to bottom after loading
-    setTimeout(() => {
-        scrollToBottom();
-    }, 300);
-    
-    // Setup message input
+    setTimeout(scrollToBottom, 300);
     setupConversationMessageInput(userId);
-    
-    // Start polling for new messages
     startMessagePolling();
 }
 
 function highlightActiveChat(chatId) {
-    // Remove active class from all chats
-    document.querySelectorAll('[id^="conversation-"], [id="global-chat-link"]').forEach(el => {
-        el.style.backgroundColor = 'white';
-        el.style.borderColor = '#ddd';
-    });
+    document.querySelectorAll('.chat-item').forEach(el => el.classList.remove('active'));
 
-    // Add active class to current chat
     const activeEl = chatId === 'global' ?
         document.getElementById('global-chat-link') :
         document.getElementById('conversation-' + chatId);
 
-    if (activeEl) {
-        activeEl.style.backgroundColor = '#e8f4fd';
-        activeEl.style.borderColor = '#2196F3';
-    }
+    if (activeEl) activeEl.classList.add('active');
 }
 
-function loadGlobalMessages() {
+function loadGlobalMessages(silent = false) {
     const container = document.getElementById('messages-container');
-    container.innerHTML = '<div style="text-align: center; padding: 40px; color: #666;">Loading messages...</div>';
+
+    if (isFirstLoad && !silent) {
+        container.innerHTML = '<div style="text-align: center; padding: 40px; color: #666;">Loading messages...</div>';
+    }
 
     fetch('<?= Config::get('URL') ?>message/getGlobalMessages')
         .then(response => {
-            console.log('Global messages response status:', response.status);
-            console.log('Global messages response headers:', response.headers);
-            
-            if (!response.ok) {
-                return response.text().then(text => {
-                    console.error('Server returned non-JSON response for global messages:', text);
-                    throw new Error(`HTTP error! status: ${response.status}, response: ${text.substring(0, 200)}`);
-                });
-            }
+            if (!response.ok) throw new Error('HTTP error: ' + response.status);
             return response.json();
         })
         .then(data => {
             if (data.success && data.messages) {
+                const wasAtBottom = container.scrollHeight - container.scrollTop <= container.clientHeight + 50;
                 displayGlobalMessages(data.messages);
-            } else {
-                container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Error loading messages: ' + (data.message || 'Unknown error') + '</div>';
+                if (wasAtBottom) scrollToBottom();
+                isFirstLoad = false;
+            } else if (isFirstLoad) {
+                container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Error loading messages</div>';
             }
         })
         .catch(error => {
             console.error('Error loading global messages:', error);
-            container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Network error: ' + error.message + '</div>';
+            if (isFirstLoad) {
+                container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Network error</div>';
+            }
         });
 }
 
-function loadConversationMessages(userId) {
+function loadConversationMessages(userId, silent = false) {
     const container = document.getElementById('messages-container');
-    container.innerHTML = '<div style="text-align: center; padding: 40px; color: #666;">Loading messages...</div>';
+
+    if (isFirstLoad && !silent) {
+        container.innerHTML = '<div style="text-align: center; padding: 40px; color: #666;">Loading messages...</div>';
+    }
 
     fetch(`<?= Config::get('URL') ?>message/getConversationMessages/${userId}`)
-        .then(response => response.json())
+        .then(response => {
+            if (!response.ok) throw new Error('HTTP error: ' + response.status);
+            return response.json();
+        })
         .then(data => {
             if (data.success && data.messages) {
+                const wasAtBottom = container.scrollHeight - container.scrollTop <= container.clientHeight + 50;
                 displayConversationMessages(data.messages);
-            } else {
+                if (wasAtBottom) scrollToBottom();
+                isFirstLoad = false;
+            } else if (isFirstLoad) {
                 container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Error loading messages</div>';
             }
         })
         .catch(error => {
             console.error('Error loading conversation messages:', error);
-            container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Network error</div>';
+            if (isFirstLoad) {
+                container.innerHTML = '<div style="text-align: center; padding: 40px; color: #f44336;">Network error</div>';
+            }
         });
 }
 
@@ -383,9 +573,9 @@ function displayGlobalMessages(messages) {
 
     if (messages.length === 0) {
         container.innerHTML = `
-            <div style="text-align: center; padding: 60px 20px;">
-                <h4 style="color: #666;">No messages yet</h4>
-                <p style="color: #999;">Start the conversation!</p>
+            <div class="default-welcome">
+                <h3>No messages yet</h3>
+                <p>Start the conversation!</p>
             </div>
         `;
         return;
@@ -400,15 +590,17 @@ function displayGlobalMessages(messages) {
         });
 
         const isOwn = message.sender_id == document.querySelector('meta[name="user-id"]').content;
+        const initial = message.sender_name.charAt(0).toUpperCase();
 
         return `
             <div class="global-message">
                 <div class="global-message-header">
-                    <div style="display: flex; align-items: center; gap: 8px;">
+                    <div class="global-message-sender">
+                        <div class="sender-avatar" style="${isOwn ? 'background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);' : ''}">${initial}</div>
                         <strong style="color: ${isOwn ? '#2196F3' : '#333'}">
                             ${escapeHtml(message.sender_name)}
                         </strong>
-                        ${isOwn ? '<span style="font-size: 10px; background: #2196F3; color: white; padding: 2px 4px; border-radius: 3px;">You</span>' : ''}
+                        ${isOwn ? '<span style="font-size: 10px; background: #2196F3; color: white; padding: 2px 6px; border-radius: 4px;">You</span>' : ''}
                     </div>
                     <span class="message-time">${timeString}</span>
                 </div>
@@ -419,7 +611,6 @@ function displayGlobalMessages(messages) {
         `;
     }).join('');
 
-    // Scroll to bottom
     container.scrollTop = container.scrollHeight;
 }
 
@@ -429,9 +620,9 @@ function displayConversationMessages(messages) {
 
     if (messages.length === 0) {
         container.innerHTML = `
-            <div style="text-align: center; padding: 60px 20px;">
-                <h4 style="color: #666;">No messages yet</h4>
-                <p style="color: #999;">Send a message to start the conversation!</p>
+            <div class="default-welcome">
+                <h3>No messages yet</h3>
+                <p>Send a message to start the conversation!</p>
             </div>
         `;
         return;
@@ -460,7 +651,6 @@ function displayConversationMessages(messages) {
         `;
     }).join('');
 
-    // Scroll to bottom
     container.scrollTop = container.scrollHeight;
 }
 
@@ -472,9 +662,9 @@ function setupGlobalMessageInput() {
                 <input type="text"
                        name="message"
                        placeholder="Type your global message..."
-                       style="flex: 1; padding: 12px; border: 1px solid #ddd; border-radius: 25px;" 
+                       class="message-input"
                        required>
-                <button type="submit" class="button" style="border-radius: 25px; padding: 12px 20px;">Send</button>
+                <button type="submit" class="button send-button">Send</button>
             </div>
         </form>
     `;
@@ -488,9 +678,9 @@ function setupConversationMessageInput(userId) {
                 <input type="text"
                        name="message"
                        placeholder="Type your message..."
-                       style="flex: 1; padding: 12px; border: 1px solid #ddd; border-radius: 25px;" 
+                       class="message-input"
                        required>
-                <button type="submit" class="button" style="border-radius: 25px; padding: 12px 20px;">Send</button>
+                <button type="submit" class="button send-button">Send</button>
             </div>
         </form>
     `;
@@ -515,32 +705,20 @@ function sendGlobalMessage(event) {
         body: 'message=' + encodeURIComponent(message)
     })
     .then(response => {
-        console.log('Global message response status:', response.status);
-        console.log('Global message response headers:', response.headers);
-        
-        if (!response.ok) {
-            return response.text().then(text => {
-                console.error('Server returned non-JSON response for global message:', text);
-                throw new Error(`HTTP error! status: ${response.status}, response: ${text.substring(0, 200)}`);
-            });
-        }
+        if (!response.ok) throw new Error('HTTP error: ' + response.status);
         return response.json();
     })
     .then(data => {
         if (data.success) {
             form.reset();
-            loadGlobalMessages(); // Refresh messages
-            // Scroll to bottom after sending
-            setTimeout(() => {
-                scrollToBottom();
-            }, 500);
+            loadGlobalMessages(true);
+            setTimeout(scrollToBottom, 300);
         } else {
             alert('Failed to send message: ' + (data.message || 'Unknown error'));
         }
     })
     .catch(error => {
-        console.error('Error sending global message:', error);
-        alert('Network error. Please try again. (' + error.message + ')');
+        alert('Network error. Please try again.');
     })
     .finally(() => {
         submitButton.textContent = originalText;
@@ -567,32 +745,20 @@ function sendConversationMessage(event, userId) {
         body: 'receiver_id=' + userId + '&message=' + encodeURIComponent(message)
     })
     .then(response => {
-        console.log('Response status:', response.status);
-        console.log('Response headers:', response.headers);
-        
-        if (!response.ok) {
-            return response.text().then(text => {
-                console.error('Server returned non-JSON response:', text);
-                throw new Error(`HTTP error! status: ${response.status}, response: ${text.substring(0, 200)}`);
-            });
-        }
+        if (!response.ok) throw new Error('HTTP error: ' + response.status);
         return response.json();
     })
     .then(data => {
         if (data.success) {
             form.reset();
-            loadConversationMessages(userId); // Refresh messages
-            // Scroll to bottom after sending
-            setTimeout(() => {
-                scrollToBottom();
-            }, 500);
+            loadConversationMessages(userId, true);
+            setTimeout(scrollToBottom, 300);
         } else {
             alert('Failed to send message: ' + (data.message || 'Unknown error'));
         }
     })
     .catch(error => {
-        console.error('Error sending conversation message:', error);
-        alert('Network error. Please try again. (' + error.message + ')');
+        alert('Network error. Please try again.');
     })
     .finally(() => {
         submitButton.textContent = originalText;
@@ -601,19 +767,15 @@ function sendConversationMessage(event, userId) {
 }
 
 function startMessagePolling() {
-    // Clear existing polling
-    if (messagePollingInterval) {
-        clearInterval(messagePollingInterval);
-    }
+    if (messagePollingInterval) clearInterval(messagePollingInterval);
 
-    // Start new polling
     messagePollingInterval = setInterval(() => {
         if (currentChatType === 'global') {
-            loadGlobalMessages();
+            loadGlobalMessages(true);
         } else if (currentChatType === 'conversation') {
-            loadConversationMessages(currentChatId);
+            loadConversationMessages(currentChatId, true);
         }
-    }, 3000); // Poll every 3 seconds
+    }, 3000);
 }
 
 function escapeHtml(text) {
@@ -622,7 +784,6 @@ function escapeHtml(text) {
     return div.innerHTML;
 }
 
-// Handle new message form submission
 document.getElementById('message-form').addEventListener('submit', function(e) {
     e.preventDefault();
 
@@ -642,13 +803,11 @@ document.getElementById('message-form').addEventListener('submit', function(e) {
         if (data.success) {
             this.reset();
             showFeedback('Message sent successfully!', 'success');
-            // Could refresh conversation list here
         } else {
             showFeedback(data.message || 'Failed to send message', 'error');
         }
     })
     .catch(error => {
-        console.error('Error sending message:', error);
         showFeedback('Network error. Please try again.', 'error');
     })
     .finally(() => {
@@ -659,7 +818,6 @@ document.getElementById('message-form').addEventListener('submit', function(e) {
 
 function showFeedback(message, type) {
     const feedback = document.createElement('div');
-    feedback.className = `feedback-${type}`;
     feedback.textContent = message;
     feedback.style.cssText = `
         position: fixed;
@@ -682,14 +840,12 @@ function showFeedback(message, type) {
     }, 3000);
 }
 
-// Add CSS for animations
 const animationStyle = document.createElement('style');
 animationStyle.textContent = `
     @keyframes slideIn {
         from { transform: translateX(100%); opacity: 0; }
         to { transform: translateX(0); opacity: 1; }
     }
-    
     @keyframes slideOut {
         from { transform: translateX(0); opacity: 1; }
         to { transform: translateX(100%); opacity: 0; }

application/view/register/index.php

@@ -1,18 +1,30 @@
-<div class="container">
+<script src="https://www.google.com/recaptcha/api.js?render=<?php echo Config::get('RECAPTCHA_SITE_KEY'); ?>"></script>
 
-    <!-- echo out the system feedback (error and success messages) -->
+<div class="container">
     <?php $this->renderFeedbackMessages(); ?>
 
-    <!-- login box on left side -->
     <div class="login-box" style="width: 50%; display: block;">
         <h2>Register a new account</h2>
 
-        <!-- register form -->
-        <form method="post" action="<?php echo Config::get('URL'); ?>register/register_action">
+        <form method="post" action="<?php echo Config::get('URL'); ?>register/register_action" id="register-form">
             <input type="text" pattern="[a-zA-Z0-9]{2,64}" name="user_name" placeholder="Username (letters/numbers, 2-64 chars)" required />
             <input type="text" name="user_email" placeholder="email address (a real address)" required />
             <input type="password" name="user_password_new" pattern=".{6,}" placeholder="Password (6+ characters)" required autocomplete="off" />
+            <input type="hidden" name="g-recaptcha-response" id="recaptcha-response" />
             <input type="submit" value="Register" />
         </form>
     </div>
 </div>
+
+<script>
+document.getElementById('register-form').addEventListener('submit', function(e) {
+    e.preventDefault();
+    var form = this;
+    grecaptcha.ready(function() {
+        grecaptcha.execute('<?php echo Config::get('RECAPTCHA_SITE_KEY'); ?>', {action: 'register'}).then(function(token) {
+            document.getElementById('recaptcha-response').value = token;
+            form.submit();
+        });
+    });
+});
+</script>