RealTime notify updated

src/main/java/org/to/telegramfinalproject/Client/ActionHandler.java

@@ -6,16 +6,19 @@ import org.to.telegramfinalproject.Models.ChatEntry;
 import org.to.telegramfinalproject.Models.SearchRequestModel;
 
 import java.io.BufferedReader;
+import java.io.IOException;
 import java.io.PrintWriter;
 import java.time.LocalDateTime;
 import java.util.*;
 
-import static org.to.telegramfinalproject.Database.ChannelDatabase.addSubscriberToChannel;
 
 public class ActionHandler {
     private final PrintWriter out;
     private final BufferedReader in;
     private final Scanner scanner;
+    public static volatile boolean forceExitChat = false;
+
+
 
     public ActionHandler(PrintWriter out, BufferedReader in, Scanner scanner) {
         this.out = out;
@@ -353,6 +356,7 @@ public class ActionHandler {
 
 
                         chatList.add(entry);
+
                     }
 
 
@@ -625,11 +629,36 @@ public class ActionHandler {
         req.put("action", "get_messages");
         req.put("receiver_id", chat.getId());
         req.put("receiver_type", chat.getType());
-        send(req);
+
+        JSONObject res = sendWithResponse(req);
+        if (res == null || !res.getString("status").equals("success")) {
+            System.out.println("❌ Failed to fetch messages.");
+            return;
+        }
+
+        JSONArray messages = res.getJSONObject("data").getJSONArray("messages");
+        System.out.println("\n🔓 Messages fetched:");
+        System.out.println("─────────────────────────────────────────────");
+        for (int i = 0; i < messages.length(); i++) {
+            JSONObject m = messages.getJSONObject(i);
+            String senderId = m.getString("sender_id");
+            String content = m.getString("content");
+            String time = m.getString("send_at");
+
+            String label = senderId.equals(Session.currentUser.getString("internal_uuid")) ? "You" : "Other";
+            System.out.println("[" + time + "] " + label + ": " + content);
+        }
+        System.out.println("─────────────────────────────────────────────");
 
         boolean stayInChat = true;
 
         while (stayInChat) {
+            if (forceExitChat) {
+                System.out.println("⚠️ You have been removed from this chat or chat was deleted. Returning to chat list...");
+                forceExitChat = false;
+                break;
+            }
+
             switch (chat.getType().trim().toLowerCase()) {
                 case "private" -> stayInChat = showPrivateChatMenu(chat);
                 case "group" -> stayInChat = showGroupChatMenu(chat);
@@ -1752,6 +1781,7 @@ public class ActionHandler {
     private JSONObject getResponse() {
         try {
             return TelegramClient.responseQueue.take();
+
         } catch (InterruptedException e) {
             throw new RuntimeException("Failed to get server response");
         }
@@ -1774,54 +1804,54 @@ public class ActionHandler {
 
 
 
-    public void processIncomingEvents() {
+//    public void processIncomingEvents() {
-        try {
+//        try {
-            while (in.ready()) {
+//            while (in.ready()) {
-                String line = in.readLine();
+//                String line = in.readLine();
-                if (line == null) continue;
+//                if (line == null) continue;
-
+//
-                JSONObject response = new JSONObject(line);
+//                JSONObject response = new JSONObject(line);
-                if (!response.has("action")) continue;
+//                if (!response.has("action")) continue;
-
+//
-                String action = response.getString("action");
+//                String action = response.getString("action");
-
+//
-                switch (action) {
+//                switch (action) {
-                    case "new_message" -> {
+//                    case "new_message" -> {
-                        JSONObject msg = response.getJSONObject("data");
+//                        JSONObject msg = response.getJSONObject("data");
-                        System.out.println("\n🔔 New Message:");
+//                        System.out.println("\n🔔 New Message:");
-                        System.out.println("From: " + msg.getString("sender"));
+//                        System.out.println("From: " + msg.getString("sender"));
-                        System.out.println("Time: " + msg.getString("time"));
+//                        System.out.println("Time: " + msg.getString("time"));
-                        System.out.println("Content: " + msg.getString("content"));
+//                        System.out.println("Content: " + msg.getString("content"));
-                        System.out.print(">> ");
+//                        System.out.print(">> ");
-                    }
+//                    }
-
+//
-                    case "user_status_changed" -> {
+//                    case "user_status_changed" -> {
-                        JSONObject msg = response.getJSONObject("data");
+//                        JSONObject msg = response.getJSONObject("data");
-                        System.out.println("\n🔄 User Status Changed:");
+//                        System.out.println("\n🔄 User Status Changed:");
-                        System.out.println("User: " + msg.getString("user_id"));
+//                        System.out.println("User: " + msg.getString("user_id"));
-                        System.out.println("Status: " + msg.getString("status"));
+//                        System.out.println("Status: " + msg.getString("status"));
-                        System.out.print(">> ");
+//                        System.out.print(">> ");
-                    }
+//                    }
-
+//
-                    case "update_group_or_channel" -> {
+//                    case "update_group_or_channel" -> {
-                        JSONObject data = response.getJSONObject("data");
+//                        JSONObject data = response.getJSONObject("data");
-                        System.out.println("\n📢 " + data.getString("chat_type") + " updated: " + data.getString("new_name"));
+//                        System.out.println("\n📢 " + data.getString("chat_type") + " updated: " + data.getString("new_name"));
-                        System.out.print(">> ");
+//                        System.out.print(">> ");
-                    }
+//                    }
-
+//
-
+//
-                    default -> {
+//                    default -> {
-                        if (!action.equals("search")) {
+//                        if (!action.equals("search")) {
-                            System.out.println("\n❓ Unknown action received: " + action);
+//                            System.out.println("\n❓ Unknown action received: " + action);
-                            System.out.print(">> ");
+//                            System.out.print(">> ");
-                        }
+//                        }
-                    }
+//                    }
-                }
+//                }
-            }
+//            }
-        } catch (Exception e) {
+//        } catch (Exception e) {
-            System.out.println("🔴 Failed to process event: " + e.getMessage());
+//            System.out.println("🔴 Failed to process event: " + e.getMessage());
-        }
+//        }
-    }
+//    }
 
 
     public void addAdminToEntity(String type, UUID entityId) {
@@ -1987,5 +2017,55 @@ public class ActionHandler {
         }
     }
 
+    public static void requestChatList() throws IOException {
+        System.out.println("🟢 [requestChatList] Sending chat list request...");
+
+        JSONObject req = new JSONObject();
+        req.put("action", "get_chat_list");
+        req.put("user_id", TelegramClient.loggedInUserId.toString());
+
+        System.out.println("📤 [SEND] " + req.toString(2));
+
+        TelegramClient.send(req);
+    }
+
+    public static void requestChatInfo(String chatId, String chatType) throws IOException {
+        JSONObject req = new JSONObject();
+        req.put("action", "get_chat_info");
+        req.put("receiver_id", chatId);
+        req.put("receiver_type", chatType);
+        TelegramClient.send(req);
+    }
+
+
+//    public static void handleChatListResponse(JSONObject response) {
+//        if (response.getString("status").equals("success")) {
+//            JSONArray chats = response.getJSONArray("data");
+//
+//            TelegramClient.chatList.clear();
+//
+//            for (int i = 0; i < chats.length(); i++) {
+//                JSONObject chatJson = chats.getJSONObject(i);
+//
+//                UUID internalId = UUID.fromString(chatJson.getString("internal_id"));
+//                String displayId = chatJson.getString("id");
+//                String name = chatJson.getString("name");
+//                String imageUrl = chatJson.optString("image_url", "");
+//                String type = chatJson.getString("type");
+//                LocalDateTime lastMessageTime = LocalDateTime.parse(chatJson.getString("last_message_time"));
+//
+//                ChatEntry chat = new ChatEntry(internalId, displayId, name, imageUrl, type, lastMessageTime);
+//                TelegramClient.chatList.add(chat);
+//            }
+//
+//            System.out.println("\n✅ Updated Chat List:");
+//            displayChatList();
+//        } else {
+//            System.out.println("⚠️ Failed to fetch chat list: " + response.getString("message"));
+//        }
+//    }
+
+
+
 
 }

src/main/java/org/to/telegramfinalproject/Client/EventProcessorThread.java

@@ -8,13 +8,13 @@ public class EventProcessorThread extends Thread {
         setDaemon(true);
     }
 
-    @Override
+//    @Override
-    public void run() {
+//    public void run() {
-        while (true) {
+//        while (true) {
-            try {
+//            try {
-                Thread.sleep(2000);
+//                Thread.sleep(2000);
-                handler.processIncomingEvents();
+//                handler.processIncomingEvents();
-            } catch (InterruptedException ignored) {}
+//            } catch (InterruptedException ignored) {}
-        }
+//        }
-    }
+//    }
 }

src/main/java/org/to/telegramfinalproject/Client/IncomingMessageListener.java

@@ -3,6 +3,7 @@ package org.to.telegramfinalproject.Client;
 import org.json.JSONObject;
 
 import java.io.BufferedReader;
+import java.io.IOException;
 
 public class IncomingMessageListener implements Runnable {
     private final BufferedReader in;
@@ -22,7 +23,11 @@ public class IncomingMessageListener implements Runnable {
                 System.out.println("📥 Received raw line: " + line);
 
                 if (response.has("action")) {
+                    System.out.println("🎯 [Listener] Action received: " + response.toString(2));
+
                     String action = response.getString("action");
+                    System.out.println("🎯 Received action: " + action);
+
                     if (isRealTimeEvent(action)) {
                         handleRealTimeEvent(response);
                     } else {
@@ -36,7 +41,8 @@ public class IncomingMessageListener implements Runnable {
             }
 
         } catch (Exception e) {
-            System.out.println("🔴 Listener stopped: " + e.getMessage());
+            System.out.println("🔴 [Listener] Crashed due to: " + e.getMessage());
+            e.printStackTrace();
         }
     }
 
@@ -52,10 +58,44 @@ public class IncomingMessageListener implements Runnable {
         };
     }
 
-    private void handleRealTimeEvent(JSONObject response) {
+    private void handleRealTimeEvent(JSONObject response) throws IOException {
         String action = response.getString("action");
         JSONObject msg = response.getJSONObject("data");
 
+        switch (action) {
+            case "added_to_group", "added_to_channel",
+                 "removed_from_group", "removed_from_channel", "chat_deleted" -> {
+                System.out.println("\n🔄 Chat list changed. Updating...");
+                ActionHandler.requestChatList();
+
+                if (action.equals("removed_from_group") || action.equals("removed_from_channel") || action.equals("chat_deleted")) {
+                    System.out.println("🚫 You were removed from the chat or chat was deleted. Exiting...");
+                    ActionHandler.forceExitChat = true;
+                }
+            }
+
+            case "update_group_or_channel" -> {
+                System.out.println("\n🔄 Group/Channel info updated.");
+                String chatId = msg.getString("chat_id");
+                String chatType = msg.getString("chat_type");
+                ActionHandler.requestChatInfo(chatId, chatType);
+            }
+
+            case "became_admin", "removed_admin" -> {
+                System.out.println("\n🔄 Your admin status changed. Updating chat info...");
+                String chatId = msg.getString("chat_id");
+                String chatType = msg.getString("chat_type");
+                ActionHandler.requestChatInfo(chatId, chatType);
+            }
+
+            default -> displayRealTimeMessage(action, msg);
+        }
+
+        System.out.print(">> ");
+    }
+
+
+    private void displayRealTimeMessage(String action, JSONObject msg) {
         switch (action) {
             case "new_message" -> {
                 System.out.println("\n🔔 New Message:");
@@ -63,76 +103,36 @@ public class IncomingMessageListener implements Runnable {
                 System.out.println("Time: " + msg.getString("time"));
                 System.out.println("Content: " + msg.getString("content"));
             }
-
             case "message_edited" -> {
                 System.out.println("\n✏️ Message Edited:");
                 System.out.println("ID: " + msg.getString("message_id"));
                 System.out.println("New Content: " + msg.getString("new_content"));
                 System.out.println("Edit Time: " + msg.getString("edited_at"));
             }
-
             case "message_deleted" -> {
                 System.out.println("\n🗑️ Message Deleted:");
                 System.out.println("Message ID: " + msg.getString("message_id"));
             }
-
             case "user_status_changed" -> {
                 System.out.println("\n🔄 User Status Changed:");
                 System.out.println("User: " + msg.getString("user_id"));
                 System.out.println("Status: " + msg.getString("status"));
             }
-
-            case "added_to_group" -> {
-                System.out.println("\n👥 You were added to a group: " + msg.getString("chat_name"));
-            }
-
-            case "added_to_channel" -> {
-                System.out.println("\n📢 You were added to a channel: " + msg.getString("chat_name"));
-            }
-
-            case "update_group_or_channel" -> {
-                System.out.println("\n🔄 Group/Channel updated: " + msg.getString("new_name"));
-            }
-
-            case "chat_deleted" -> {
-                System.out.println("\n🗑️ Chat deleted: " + msg.getString("chat_id"));
-            }
-
             case "blocked_by_user" -> {
                 System.out.println("\n⛔ You were blocked by user: " + msg.getString("blocker_id"));
             }
-
             case "unblocked_by_user" -> {
                 System.out.println("\n✅ You were unblocked by user: " + msg.getString("unblocker_id"));
             }
-
             case "message_seen" -> {
                 System.out.println("\n👁️ Your message was seen:");
                 System.out.println("Message ID: " + msg.getString("message_id"));
                 System.out.println("Seen at: " + msg.getString("seen_at"));
             }
-
-            case "removed_from_group" -> {
-                System.out.println("\n🚫 You were removed from group: " + msg.getString("chat_id"));
-            }
-
-            case "removed_from_channel" -> {
-                System.out.println("\n🚫 You were removed from channel: " + msg.getString("chat_id"));
-            }
-
-            case "became_admin" -> {
-                System.out.println("\n⭐ You are now an admin in: " + msg.getString("chat_name"));
-            }
-
-            case "removed_admin" -> {
-                System.out.println("\n⚠️ You are no longer an admin in: " + msg.getString("chat_name"));
-            }
-
             default -> {
                 System.out.println("\n❓ Unknown real-time action: " + action);
+                System.out.println(msg.toString(2));
             }
         }
-
-        System.out.print(">> ");
     }
-}
+}

src/main/java/org/to/telegramfinalproject/Client/TelegramClient.java

@@ -15,24 +15,32 @@ import java.util.concurrent.LinkedBlockingQueue;
 public class TelegramClient {
     private static final String SERVER_HOST = "localhost";
     private static final int SERVER_PORT = 8000;
-    private Socket socket;
+    private static Socket socket;
     private BufferedReader in;
     private PrintWriter out;
     private final Scanner scanner;
-    ActionHandler handler = null;
+    private ActionHandler handler;
     public static BlockingQueue<JSONObject> responseQueue = new LinkedBlockingQueue<>();
+    public static UUID loggedInUserId = null;
+
+    private static TelegramClient instance;
 
     public TelegramClient() {
         this.scanner = new Scanner(System.in);
+        instance = this;
+    }
+
+    public static TelegramClient getInstance() {
+        return instance;
     }
 
     public void start() {
         try {
-            this.socket = new Socket(SERVER_HOST, SERVER_PORT);
+            socket = new Socket(SERVER_HOST, SERVER_PORT);
-            this.in = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
+            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
-            this.out = new PrintWriter(this.socket.getOutputStream(), true);
+            out = new PrintWriter(socket.getOutputStream(), true);
             System.out.println("✅ Connected to Telegram Server");
-            this.handler = new ActionHandler(this.out, this.in, this.scanner);
+            handler = new ActionHandler(out, in, scanner);
 
             Thread listenerThread = new Thread(new IncomingMessageListener(in));
             listenerThread.setDaemon(true);
@@ -60,7 +68,10 @@ public class TelegramClient {
                     handler.loginHandler();
                     if (Session.currentUser != null) {
                         System.out.println("✅ Login successful.");
+
                         UUID internalId = UUID.fromString(Session.currentUser.getString("internal_uuid"));
+                        loggedInUserId = internalId;
+
                         handler.userMenu(internalId);
                     } else {
                         System.out.println("❌ Login failed.");
@@ -75,6 +86,21 @@ public class TelegramClient {
         }
     }
 
+    public static void send(JSONObject req) {
+        try {
+            responseQueue.clear();  // optional: clear old responses
+            getInstance().out.println(req.toString());
+            System.out.println("📤 [SEND] " + req.toString(2));
+
+        } catch (Exception e) {
+            System.err.println("❌ Error sending request: " + e.getMessage());
+        }
+    }
+
+    public static Socket getSocket() {
+        return socket;
+    }
+
     public static void main(String[] args) {
         new TelegramClient().start();
     }

src/main/java/org/to/telegramfinalproject/Server/ClientHandler.java

@@ -327,6 +327,11 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "add_contact": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
+
                         UUID userUUID = new userDatabase().findByUserId(requestJson.getString("user_id")).getInternal_uuid();
                         UUID contactUUID = UUID.fromString(requestJson.getString("contact_id"));
 
@@ -350,6 +355,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "join_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID userUUID = UUID.fromString(requestJson.getString("user_id"));
                         Group group = GroupDatabase.findByInternalUUID(UUID.fromString(requestJson.getString("id")));
                         if (group == null) {
@@ -373,6 +382,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "join_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID userUUID = UUID.fromString(requestJson.getString("user_id"));
                         Channel channel = ChannelDatabase.findByInternalUUID(UUID.fromString(requestJson.getString("id")));
                         if (channel == null) {
@@ -489,22 +502,26 @@ public class ClientHandler implements Runnable {
 
 
                     case "get_chat_list": {
-                        String userIdStr = requestJson.getString("user_id");
+                        if (currentUser == null) {
-                        User user = new userDatabase().findByUserId(userIdStr);
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
 
-                        List<Contact> contacts = ContactDatabase.getContacts(user.getInternal_uuid());
+                        List<Contact> contacts = ContactDatabase.getContacts(currentUser.getInternal_uuid());
-                        List<Group> groups = GroupDatabase.getGroupsByUser(user.getInternal_uuid());
+                        List<Group> groups = GroupDatabase.getGroupsByUser(currentUser.getInternal_uuid());
-                        List<Channel> channels = ChannelDatabase.getChannelsByUser(user.getInternal_uuid());
+                        List<Channel> channels = ChannelDatabase.getChannelsByUser(currentUser.getInternal_uuid());
 
                         List<ChatEntry> chatList = new ArrayList<>();
+
                         for (Contact contact : contacts) {
                             User target = userDatabase.findByInternalUUID(contact.getContact_id());
                             if (target == null) continue;
-                            LocalDateTime last = MessageDatabase.getLastMessageTimeBetween(user.getInternal_uuid(), target.getInternal_uuid(), "private");
+
+                            LocalDateTime last = MessageDatabase.getLastMessageTimeBetween(currentUser.getInternal_uuid(), target.getInternal_uuid(), "private");
 
                             chatList.add(new ChatEntry(
-                                    target.getInternal_uuid(),      // internal UUID
+                                    target.getInternal_uuid(),
-                                    target.getUser_id(),            // public display ID
+                                    target.getUser_id(),
                                     target.getProfile_name(),
                                     target.getImage_url(),
                                     "private",
@@ -516,8 +533,8 @@ public class ClientHandler implements Runnable {
 
                         for (Group group : groups) {
                             LocalDateTime last = MessageDatabase.getLastMessageTime(group.getInternal_uuid(), "group");
-                            boolean isOwner = GroupDatabase.isOwner(group.getInternal_uuid(), user.getInternal_uuid());
+                            boolean isOwner = GroupDatabase.isOwner(group.getInternal_uuid(), currentUser.getInternal_uuid());
-                            boolean isAdmin = GroupDatabase.isAdmin(group.getInternal_uuid(), user.getInternal_uuid());
+                            boolean isAdmin = GroupDatabase.isAdmin(group.getInternal_uuid(), currentUser.getInternal_uuid());
 
                             chatList.add(new ChatEntry(
                                     group.getInternal_uuid(),
@@ -533,8 +550,8 @@ public class ClientHandler implements Runnable {
 
                         for (Channel channel : channels) {
                             LocalDateTime last = MessageDatabase.getLastMessageTime(channel.getInternal_uuid(), "channel");
-                            boolean isOwner = ChannelDatabase.isOwner(channel.getInternal_uuid(), user.getInternal_uuid());
+                            boolean isOwner = ChannelDatabase.isOwner(channel.getInternal_uuid(), currentUser.getInternal_uuid());
-                            boolean isAdmin = ChannelDatabase.isAdmin(channel.getInternal_uuid(), user.getInternal_uuid());
+                            boolean isAdmin = ChannelDatabase.isAdmin(channel.getInternal_uuid(), currentUser.getInternal_uuid());
 
                             chatList.add(new ChatEntry(
                                     channel.getInternal_uuid(),
@@ -548,7 +565,6 @@ public class ClientHandler implements Runnable {
                             ));
                         }
 
-
                         chatList.sort((a, b) -> {
                             if (a.getLastMessageTime() == null) return 1;
                             if (b.getLastMessageTime() == null) return -1;
@@ -557,14 +573,19 @@ public class ClientHandler implements Runnable {
 
                         JSONObject data = new JSONObject();
                         data.put("chat_list", JsonUtil.chatListToJson(chatList));
-
                         response = new ResponseModel("success", "Chat list updated.", data);
+
                         break;
                     }
 
 
 
+
                     case "create_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             String groupId = requestJson.getString("group_id");
                             String groupName = requestJson.getString("group_name");
@@ -600,6 +621,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "create_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             String channelId = requestJson.getString("channel_id");
                             String channelName = requestJson.getString("channel_name");
@@ -635,6 +660,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "add_admin_to_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                             UUID targetUserId = UUID.fromString(requestJson.getString("target_user_id"));
@@ -681,6 +710,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "edit_channel_admin_permissions": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("target_user_id"));
                         JSONObject permissions = requestJson.optJSONObject("permissions");
@@ -700,6 +733,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "edit_group_info": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             UUID groupUUID = UUID.fromString(requestJson.getString("group_id")); // internal_uuid
                             String newGroupId = requestJson.getString("new_group_id").trim(); // شناسه نمایشی جدید
@@ -740,6 +777,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "view_channel_admins": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
 
 
@@ -754,6 +795,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "add_admin_to_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("user_id"));
                         JSONObject permissions = requestJson.optJSONObject("permissions");
@@ -787,6 +832,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "edit_group_admin_permissions": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("target_user_id"));
                         JSONObject permissions = requestJson.optJSONObject("permissions");
@@ -808,6 +857,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "remove_admin_from_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                         UUID targetUserUUID = UUID.fromString(requestJson.getString("target_user_id"));
 
@@ -850,6 +903,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "add_member_to_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("user_id"));
 
@@ -887,6 +944,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "remove_member_from_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("user_id"));
 
@@ -927,6 +988,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "view_group_admins": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
 
                         String role = GroupDatabase.getGroupRole(groupId, currentUser.getInternal_uuid());
@@ -944,6 +1009,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "get_messages": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             String receiverId = requestJson.getString("receiver_id");
                             String receiverType = requestJson.getString("receiver_type");
@@ -1009,6 +1078,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "toggle_block": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             UUID userUUID = UUID.fromString(requestJson.getString("user_id"));
                             UUID targetUUID = UUID.fromString(requestJson.getString("target_id"));
@@ -1035,6 +1108,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "transfer_group_ownership": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         UUID newOwnerUserId = UUID.fromString(requestJson.getString("new_owner_user_id"));
 
@@ -1072,6 +1149,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "view_group_members" : {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
 
                         JSONArray members = GroupDatabase.getGroupMembers(groupId);
@@ -1089,6 +1170,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "delete_private_chat" : {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID targetId = UUID.fromString(requestJson.getString("target_id"));
                         boolean both = requestJson.getBoolean("both");
 
@@ -1105,6 +1190,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "get_group_permissions": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         userId = currentUser.getInternal_uuid();
 
@@ -1116,6 +1205,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "leave_chat": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         String chatType = requestJson.getString("chat_type");
                         UUID chatId = UUID.fromString(requestJson.getString("chat_id"));
                          userId = UUID.fromString(requestJson.getString("user_id"));
@@ -1154,6 +1247,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "delete_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
 
                         if (!GroupDatabase.isOwner(groupId, currentUser.getInternal_uuid())) {
@@ -1177,6 +1274,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "get_channel_permissions": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                              userId = currentUser.getInternal_uuid();
@@ -1192,6 +1293,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "view_channel_subscribers": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
 
                         boolean isOwner = ChannelDatabase.isOwner(channelId, currentUser.getInternal_uuid());
@@ -1216,6 +1321,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "add_subscriber_to_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("user_id"));
 
@@ -1251,6 +1360,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "remove_subscriber_from_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("user_id"));
 
@@ -1291,6 +1404,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "edit_channel_info": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         try {
                             UUID channelUUID = UUID.fromString(requestJson.getString("channel_id")); // internal_uuid
                             String newChannelId = requestJson.getString("new_channel_id").trim();
@@ -1330,6 +1447,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "delete_channel": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
 
                         if (!ChannelDatabase.isOwner(channelId, currentUser.getInternal_uuid())) {
@@ -1353,6 +1474,10 @@ public class ClientHandler implements Runnable {
                     }
 
                     case "remove_admin_from_group": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID groupId = UUID.fromString(requestJson.getString("group_id"));
                         UUID targetUserId = UUID.fromString(requestJson.getString("target_user_id"));
 
@@ -1402,6 +1527,10 @@ public class ClientHandler implements Runnable {
 
 
                     case "transfer_channel_ownership": {
+                        if (currentUser == null) {
+                            response = new ResponseModel("error", "Unauthorized. Please login first.");
+                            break;
+                        }
                         UUID channelId = UUID.fromString(requestJson.getString("channel_id"));
                         String newOwnerUserIdStr = requestJson.getString("new_owner_user_id");
 
@@ -1442,6 +1571,8 @@ public class ClientHandler implements Runnable {
                 responseJson.put("message", response.getMessage());
                 responseJson.put("data", response.getData() != null ? response.getData() : JSONObject.NULL);
                 out.println(responseJson.toString());
+
+
             }
         } catch (IOException e) {
             System.out.println("Connection with client lost.");