Add function to clear source and chat history and invoke it via event listener when triggering chat bin icon

app.py

@@ -89,7 +89,6 @@ graph_builder.add_edge("generate", END)
 graph = graph_builder.compile(checkpointer=memory)
 # -----
 
-def bot(message, history, source_history, request: gr.Request) -> list[Any]:
 def bot(message, history, source_history, chat_hash) -> list[Any]:
     """Generate bot response and history from message.
     
@@ -124,6 +123,16 @@ def bot(message, history, source_history, chat_hash) -> list[Any]:
     source_history = build_source_history_object(response, source_history, user_input_prompt)
 
     return [response["messages"][-1].content], source_history, chat_hash
+
+def clear_chat_and_source_history(source_history, chat_hash):
+    # Clear the source history
+    source_history = []
+
+    # Return a new chat hash
+    chat_hash = create_chat_hash()
+
+    return source_history, chat_hash
+
 def create_chat_hash():
     chat_hash = str(uuid.uuid4())
     logger.info("This is the chat_hash when it is called", chat_hash=chat_hash)
@@ -136,17 +145,24 @@ with gr.Blocks() as demo:
 
     gr.Markdown("### Dies ist der aktuelle Prototyp der DEval AI4Kontextanalysen, mit dem Fokus auf dem Testen der Zitationsfunktion und der grundlegenden Konfiguration.")
     with gr.Tab("Chat"):
+        chatbot = gr.Chatbot(type="messages")
+        chatbot.clear(
+            clear_chat_and_source_history,
+            inputs=[source_history, chat_hash],
+            outputs=[source_history, chat_hash],
+        )
         gr.ChatInterface(
-        bot,
-        type="messages",
-        flagging_mode="manual",
-        editable=True, 
-        flagging_options=["Like", "Dislike", "Spam", "Inappropriate", "Other"],
-        multimodal=True,
-        textbox=gr.MultimodalTextbox(file_count="multiple"),
-        title="DEval Prototype 1",
-        additional_inputs=[source_history],
-        additional_outputs=[source_history],
+            bot,
+            chatbot=chatbot,
+            type="messages",
+            flagging_mode="manual",
+            editable=True, 
+            flagging_options=["Like", "Dislike", "Spam", "Inappropriate", "Other"],
+            multimodal=True,
+            textbox=gr.MultimodalTextbox(file_count="multiple"),
+            title="DEval Prototype 1",
+            additional_inputs=[source_history, chat_hash],
+            additional_outputs=[source_history, chat_hash],
         )
     with gr.Tab("Quellen"):
         prettified_source_history_md = gr.Markdown()