attempt to fix chatinterface being invisble after file uploaded

app.py

@@ -24,18 +24,12 @@ class PDFChatbot:
     def process_pdf(self, pdf_file):
         try:
             if self.state.is_db_ready():
-                return (
-                    gr.update(interactive=False),
-                    gr.update(visible=True)
-                )
+                return gr.update(interactive=False)
 
             file_size_mb = os.path.getsize(pdf_file.name) / (1024 * 1024)
             if file_size_mb >= 75:
                 gr.Error("File size exceeds the 75 MB limit. Please upload a smaller PDF.")
-                return (
-                    gr.update(interactive=True),
-                    gr.update(visible=False)
-                )
+                return gr.update(interactive=True)
 
             self.state = SessionState()
             doc = fitz.open(pdf_file.name)
@@ -55,19 +49,12 @@ class PDFChatbot:
             )
 
             gr.Info("PDF processed successfully! You can now ask questions about the document.")
-
-            return (
-                gr.update(interactive=False, value=None),  # Clear the file upload input
-                gr.update(visible=True)
-            )
+            return gr.update(interactive=False)
         except Exception as e:
             if os.path.exists(self.state.vector_store_path):
                 shutil.rmtree(self.state.vector_store_path)
             gr.Error(f"An error occurred: {str(e)}")
-            return (
-                gr.update(interactive=True),
-                gr.update(visible=False)
-            )
+            return gr.update(interactive=True)
 
     def chat_with_pdf(self, message, history):
         if not self.state.is_db_ready():
@@ -129,21 +116,30 @@ with gr.Blocks(title="PDF Chatbot") as demo:
             interactive=True
         )
 
-    chat_group = gr.Group(visible=False)
-    with chat_group:
-        chat_interface = gr.ChatInterface(
-            fn=chatbot.chat_with_pdf,
-            chatbot=gr.Chatbot(type="messages"),
-            textbox=gr.Textbox(placeholder="Type your question here...", scale=7),
-            examples=[["What is the main topic of the document?"], ["Summarize the key findings."], ["Who are the authors?"]],
-            title="Chat Interface",
-            theme="soft"
-        )
+    chat_interface = gr.ChatInterface(
+        fn=chatbot.chat_with_pdf,
+        chatbot=gr.Chatbot(type="messages"),
+        textbox=gr.Textbox(placeholder="Type your question here...", scale=7),
+        examples=[["What is the main topic of the document?"], ["Summarize the key findings."], ["Who are the authors?"]],
+        title="Chat Interface",
+        theme="soft",
+        visible=False
+    )
+
+    def show_chat_interface(show):
+        return gr.update(visible=True)
 
     file_upload_input.upload(
         fn=chatbot.process_pdf,
         inputs=[file_upload_input],
-        outputs=[file_upload_input, chat_group]
+        outputs=[file_upload_input]
+    )
+
+    file_upload_input.upload(
+        fn=show_chat_interface,
+        inputs=[gr.Number(value=1, visible=False)],
+        outputs=[chat_interface],
+        preprocess=False
     )
 
 demo.launch()