Add example of saving data to session state with ChatInterface

app.py

@@ -160,7 +160,7 @@ graph_builder.add_edge("generate", END)
 graph = graph_builder.compile(checkpointer=memory)
 # -----
 
-def bot(message, history) -> list[Any]:
+def bot(message, history, session_data) -> list[Any]:
     """Generate bot response and history from message.
     
     With multi-modal inputs text and each file is treated as separate message.
@@ -187,10 +187,14 @@ def bot(message, history) -> list[Any]:
     
     logger.info("Generated a response", response=response)
 
-    return [response["messages"][-1].content]
+    # Example: append dict to session state
+    session_data.append("test")
 
+    return [response["messages"][-1].content], session_data
 
 with gr.Blocks() as demo:
+    session_data = gr.State([])
+
     gr.Markdown("Dies ist der aktuelle Protozype der DEval AI4Kontextanalysen, mit dem Fokus auf das Testen der Zitationsfunktion und der grundlegenden Konfiguration.")
     with gr.Tab("Chat"):
         gr.ChatInterface(
@@ -202,6 +206,8 @@ with gr.Blocks() as demo:
         multimodal=True,
         textbox=gr.MultimodalTextbox(file_count="multiple"),
         title="DEval Prototype 1",
+        additional_inputs=[session_data],
+        additional_outputs=[session_data],
         )
     with gr.Tab("Quellen"):
         gr.Markdown("Hier sind die Quellen")
@@ -209,5 +215,9 @@ with gr.Blocks() as demo:
         source_history = gr.Markdown(pretty_source_history_md())
         btn.click(pretty_source_history_md, outputs=source_history)
 
+        gr.Markdown("## Current State:")
+        state_display = gr.Markdown()
+        session_data.change(lambda s: f"{s or []}", session_data, state_display)
+
 if __name__ == "__main__":
     demo.launch(share=False, server_name="0.0.0.0")