Added option to delete all user messages in all forum topics at once.

Author: 23rd

TMessagesProj/src/main/java/org/telegram/messenger/forkgram/Dialogs.kt

@@ -231,6 +231,101 @@ public fun CreateDeleteAllUnpinnedMessagesAlert(
     }
 }
 
+@JvmStatic
+public fun CreateDeleteAllYourMessagesInAllTopicsAlert(
+        currentAccount: Int,
+        dialogId: Long,
+        context: Context) {
+
+    val create = { text: String, callback: () -> Unit ->
+        val builder = AlertDialog.Builder(context);
+        builder.setTitle(LocaleController.getString(
+            "DeleteAllYourMessages",
+            R.string.DeleteAllYourMessages));
+        builder.setMessage(AndroidUtilities.replaceTags(text));
+
+        builder.setPositiveButton(
+            LocaleController.getString("OK", R.string.OK),
+            { _: DialogInterface?, _: Int -> callback(); });
+        builder.setNegativeButton(
+            LocaleController.getString("Cancel", R.string.Cancel),
+            null);
+        val dialog = builder.show();
+        val button = dialog.getButton(DialogInterface.BUTTON_POSITIVE) as TextView;
+        button.setTextColor(Theme.getColor(Theme.key_text_RedBold));
+    };
+
+    val messagesController = AccountInstance.getInstance(currentAccount).messagesController;
+    val topicsController = messagesController.topicsController;
+    val meId = UserConfig.getInstance(UserConfig.selectedAccount).clientUserId;
+    val chatId = -dialogId;
+
+    val deleteFor = { to: Long, found: ArrayList<TLRPC.Message> ->
+        val messages: java.util.ArrayList<Int> = ArrayList(found.map { it.id });
+        AndroidUtilities.runOnUIThread {
+            messagesController.deleteMessages(
+                messages,
+                null,
+                null,
+                to,
+                0,
+                true,
+                0);
+        };
+    };
+
+    create(
+        LocaleController.getString(
+            "DeleteAllYourMessagesInfo",
+            R.string.DeleteAllYourMessagesInfo) + "\n\n" +
+        "This will delete your messages in ALL topics of this group."
+    ) {
+        create(LocaleController.getString("ReallySure", R.string.ReallySure)) {
+            val topics = topicsController.getTopics(chatId);
+            val mePeer = messagesController.getInputPeer(meId);
+            val dialogPeer = messagesController.getInputPeer(dialogId);
+            
+            if (topics != null && topics.isNotEmpty()) {
+                // Delete messages in each topic
+                for (topic in topics) {
+                    // Use the main dialog peer but search within specific topic
+                    ForkApi.SearchAllMessages(
+                        currentAccount,
+                        dialogPeer,
+                        mePeer,
+                        { found: ArrayList<TLRPC.Message> -> 
+                            // Filter messages that belong to this topic
+                            val topicMessages = found.filter { message ->
+                                val topicId = if (message.reply_to != null && message.reply_to.reply_to_top_id != 0) {
+                                    message.reply_to.reply_to_top_id
+                                } else if (message.reply_to != null && message.reply_to.reply_to_msg_id != 0) {
+                                    message.reply_to.reply_to_msg_id
+                                } else {
+                                    message.id
+                                }
+                                topicId == topic.id
+                            }
+                            if (topicMessages.isNotEmpty()) {
+                                deleteFor(dialogId, ArrayList(topicMessages))
+                            }
+                        },
+                        {}
+                    );
+                }
+            } else {
+                // Fallback to main dialog if no topics
+                ForkApi.SearchAllMessages(
+                    currentAccount,
+                    dialogPeer,
+                    mePeer,
+                    { found: ArrayList<TLRPC.Message> -> deleteFor(dialogId, found); },
+                    {}
+                );
+            }
+        }
+    }
+}
+
 @JvmStatic
 public fun CreateFieldAlert(
         context: Context,

TMessagesProj/src/main/java/org/telegram/ui/ChatActivity.java

@@ -1758,6 +1758,7 @@ public void sendButtonPressed(int index, VideoEditedInfo videoEditedInfo, boolea
     private final static int goToFirstMessage = 35;
     private final static int deleteAllYourMessages = 36;
     private final static int deleteAllUnpinnedMessages = 37;
+    private final static int deleteAllYourMessagesInAllTopics = 38;
 
     private final static int attach_photo = 0;
     private final static int attach_gallery = 1;
@@ -4190,6 +4191,11 @@ public void run(boolean revoke) {
                         currentAccount,
                         dialog_id,
                         getParentActivity());
+                } else if (id == deleteAllYourMessagesInAllTopics) {
+                    org.telegram.messenger.forkgram.ForkDialogs.CreateDeleteAllYourMessagesInAllTopicsAlert(
+                        currentAccount,
+                        dialog_id,
+                        getParentActivity());
                 } else if (id == deleteAllUnpinnedMessages) {
                     org.telegram.messenger.forkgram.ForkDialogs.CreateDeleteAllUnpinnedMessagesAlert(
                         currentAccount,
@@ -4530,6 +4536,14 @@ public void toggleMute() {
                     R.drawable.msg_delete,
                     LocaleController.getString("DeleteAllYourMessages", R.string.DeleteAllYourMessages),
                     themeDelegate);
+                // Add option to delete messages in all topics for forum groups
+                if (ChatObject.isForum(currentChat)) {
+                    headerItem.addSubItem(
+                        deleteAllYourMessagesInAllTopics,
+                        R.drawable.msg_delete,
+                        LocaleController.getString("DeleteAllYourMessagesInAllTopics", R.string.DeleteAllYourMessagesInAllTopics),
+                        themeDelegate);
+                }
             }
             if (MessagesController.getGlobalMainSettings().getBoolean("addItemToDeleteAllUnpinnedMessages", false)
                 && ((currentUser != null && currentEncryptedChat == null) || currentChat != null)) {

TMessagesProj/src/main/res/values/strings.xml

@@ -9868,6 +9868,7 @@
     <string name="ShowNotificationContentInfo">When app is locked. Can be cause of privacy leaks.</string>
     <string name="DeleteAllYourMessages">Delete all your messages</string>
     <string name="DeleteAllYourMessagesInfo">Are you sure you want **delete all your messages** from this chat?</string>
+    <string name="DeleteAllYourMessagesInAllTopics">Delete all your messages in all topics</string>
     <string name="ReallySure">Are you **really sure**?</string>
     <string name="DisableGlobalSearch">Disable Global Search</string>
     <string name="DisableQuickReaction">Disable quick reaction</string>