fix for /home/user/app/app.py:157: UserWarning: You have not specified a value for the `type` parameter. Defaulting to the 'tuples' format for chatbot messages, but this is deprecated and will be removed in a future version of Gradio. Please set type='messages' instead,

app.py

@@ -34,15 +34,6 @@ class SessionState:
     def is_db_ready(self):
         return self.db is not None
 
-# Gradio components to be enabled/disabled
-CHAT_COMPONENTS = None
-FILE_UPLOAD_COMPONENTS = None
-
-def initialize_components(file_upload_input, chat_input, chatbot):
-    global CHAT_COMPONENTS, FILE_UPLOAD_COMPONENTS
-    CHAT_COMPONENTS = [chat_input, chatbot]
-    FILE_UPLOAD_COMPONENTS = [file_upload_input]
-
 # Helper function to generate a new session state
 def new_session():
     return SessionState()
@@ -50,12 +41,11 @@ def new_session():
 # Function to handle PDF upload and ingestion
 def process_pdf(pdf_file, state):
     try:
+        # Check if a PDF has already been processed in this session
         if state.is_db_ready():
             return (
-                f"A PDF has already been processed. Please refresh the page to upload a new one.",
-                [],
-                gr.ChatInterface(disabled=False),
-                gr.File(disabled=True)
+                gr.update(interactive=False),
+                gr.update(visible=True)
             )
 
         # Create a new session and directory for the user
@@ -63,7 +53,7 @@ def process_pdf(pdf_file, state):
         if not os.path.exists(state.vector_store_path):
             os.makedirs(state.vector_store_path)
 
-        # Extract text from the PDF
+        # Extract text from the PDF using PyMuPDF (fitz)
         doc = fitz.open(pdf_file.name)
         text = ""
         for page in doc:
@@ -83,22 +73,21 @@ def process_pdf(pdf_file, state):
         )
 
         gr.Info("PDF processed successfully! You can now ask questions about the document.")
+
+        # Return updates to the UI components
         return (
-            "",
-            [["", "PDF processed successfully! You can now ask questions."]],
-            gr.ChatInterface(disabled=False),
-            gr.File(disabled=True)
+            gr.update(interactive=False),
+            gr.update(visible=True)
         )
     except Exception as e:
         # Clean up the directory in case of an error
         if os.path.exists(state.vector_store_path):
             shutil.rmtree(state.vector_store_path)
         gr.Error(f"An error occurred: {str(e)}")
+        # Re-enable the file upload in case of error
         return (
-            "",
-            [["", f"An error occurred during processing: {str(e)}"]],
-            gr.ChatInterface(disabled=True),
-            gr.File(disabled=False)
+            gr.update(interactive=True),
+            gr.update(visible=False)
         )
 
 # Function to handle user queries
@@ -143,7 +132,6 @@ with gr.Blocks(title="PDF Chatbot") as demo:
         """
         # PDF Chatbot
         Upload a PDF to start a conversation with your document.
-        The chat interface will become active after the file is processed.
         """
     )
     
@@ -154,31 +142,24 @@ with gr.Blocks(title="PDF Chatbot") as demo:
             interactive=True
         )
     
-    chatbot = gr.Chatbot(label="Chat History", placeholder="Upload a document to start a conversation...")
-    chat_input = gr.Textbox(
-        placeholder="Type your question here...",
-        scale=7
-    )
-    
+    # Use gr.ChatInterface as a top-level component that wraps the chat logic
     chat_interface = gr.ChatInterface(
         fn=chat_with_pdf,
-        textbox=chat_input,
-        chatbot=chatbot,
+        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 is disabled until a file is processed
-        disabled=True
+        theme="soft"
     )
-    
-    # Store components in global variables for easy access
-    initialize_components(file_upload_input, chat_input, chatbot)
 
-    # Event handlers
+    # Initially hide the chat interface until a file is processed
+    chat_interface.visible = False
+    
+    # Event handler for file upload
     file_upload_input.upload(
         fn=process_pdf,
         inputs=[file_upload_input, state],
-        outputs=[file_upload_input, chatbot, chat_interface, file_upload_input]
+        outputs=[file_upload_input, chat_interface]
     )
 
 demo.launch()