FEATURE: Add a new setting to disable the automatic topic title feature of the AI bot

Add a new setting with the default set to true to maintain backward compatibility with the current behavior.
We can utilize this setting to prevent our Playground from automatically generating the title right after it finishes the reply_to method.

Author: nvh0412

config/locales/server.en.yml

@@ -87,6 +87,7 @@ en:
 
     ai_bot_enabled: "Enable the AI Bot module."
     ai_bot_enable_chat_warning: "Display a warning when PM chat is initiated. Can be overriden by editing the translation string: discourse_ai.ai_bot.pm_warning"
+    ai_bot_automatic_topic_title: "Automatically set the topic titles based on post contents."
     ai_bot_allowed_groups: "When the GPT Bot has access to the PM, it will reply to members of these groups."
     ai_bot_debugging_allowed_groups: "Allow these groups to see a debug button on posts which displays the raw AI request and response"
     ai_bot_public_sharing_allowed_groups: "Allow these groups to share AI personal messages with the public via a unique publicly available link. Note: if your site requires login, shares will also require login."

config/settings.yml

@@ -393,6 +393,8 @@ discourse_ai:
   ai_bot_enable_chat_warning:
     default: false
     client: true
+  ai_bot_automatic_topic_title:
+    default: true
   ai_bot_debugging_allowed_groups:
     type: group_list
     list_type: compact

lib/ai_bot/playground.rb

@@ -487,9 +487,7 @@ def reply_to(post)
         reply_post
       ensure
         publish_final_update(reply_post) if stream_reply
-        if reply_post && post.post_number == 1 && post.topic.private_message?
-          title_playground(reply_post)
-        end
+        title_playground(reply_post) if reply_post && can_automatically_update_title?(post)
       end
 
       def available_bot_usernames
@@ -503,6 +501,14 @@ def available_bot_user_ids
 
       private
 
+      def can_automatically_update_title?(post)
+        return false if !SiteSetting.ai_bot_automatic_topic_title
+        return false if !post.topic.private_message?
+        return false if post.post_number != 1
+
+        true
+      end
+
       def available_bot_users
         @available_bots ||=
           User.joins("INNER JOIN llm_models llm ON llm.user_id = users.id").where(active: true)

spec/lib/modules/ai_bot/playground_spec.rb

@@ -805,6 +805,70 @@
       expect(custom_prompt.last.last).to eq(bot_user.username)
     end
 
+    context "with title_playground" do
+      let(:playground) { DiscourseAi::AiBot::Playground.new(bot) }
+
+      before { allow(playground).to receive(:title_playground) }
+
+      context "when the ai_bot_automatic_topic_title config is disabled" do
+        before { SiteSetting.ai_bot_automatic_topic_title = false }
+
+        it "does not update the title" do
+          response = "This is a suggested title"
+
+          DiscourseAi::Completions::Llm.with_prepared_responses([response]) do
+            playground.reply_to(first_post)
+          end
+
+          expect(playground).not_to have_received(:title_playground)
+        end
+      end
+
+      context "when the message in the topic is not the private message" do
+        before { SiteSetting.ai_bot_automatic_topic_title = true }
+
+        it "does not update the title" do
+          allow(first_post.topic).to receive(:private_message?).and_return(false)
+
+          response = "This is a suggested title"
+
+          DiscourseAi::Completions::Llm.with_prepared_responses([response]) do
+            playground.reply_to(first_post)
+          end
+
+          expect(playground).not_to have_received(:title_playground)
+        end
+      end
+
+      context "when the post is not the first one in the topic" do
+        before { SiteSetting.ai_bot_automatic_topic_title = true }
+
+        it "does not update the title" do
+          response = "This is a suggested title"
+
+          DiscourseAi::Completions::Llm.with_prepared_responses([response]) do
+            playground.reply_to(second_post)
+          end
+
+          expect(playground).not_to have_received(:title_playground)
+        end
+      end
+
+      context "when the AI bot can automatically update the title" do
+        before { SiteSetting.ai_bot_automatic_topic_title = true }
+
+        it "updates the title using bot suggestions" do
+          response = "This is a suggested title"
+
+          DiscourseAi::Completions::Llm.with_prepared_responses([response]) do
+            playground.reply_to(first_post)
+          end
+
+          expect(playground).to have_received(:title_playground)
+        end
+      end
+    end
+
     context "with Dall E bot" do
       before { SiteSetting.ai_openai_api_key = "123" }