Update app.py

app.py

@@ -30,9 +30,17 @@ def load_current_selections():
     else:
         return pd.DataFrame(columns=["Name", "Drinks", "Food"])
 
-# Save current user selections to the shared CSV file
+# Save current user selections to the shared CSV file without overwriting previous data
 def save_current_selection_to_file(current_selections):
-    current_selections.to_csv(TEMP_FILE, index=False)
+    # Read the existing file to avoid overwriting
+    if os.path.exists(TEMP_FILE):
+        existing_selections = pd.read_csv(TEMP_FILE)
+        combined_selections = pd.concat([existing_selections, current_selections]).drop_duplicates()
+    else:
+        combined_selections = current_selections
+
+    # Save the updated DataFrame to the CSV file
+    combined_selections.to_csv(TEMP_FILE, index=False)
 
 # Upload the shared file to Hugging Face repository for persistence
 def upload_temp_file_to_repo():
@@ -138,13 +146,13 @@ if menu == "Poll":
                 st.session_state.history.append({"Date": timestamp, "Summary": df})
                 st.success(f"Summary submitted at {timestamp}")
                 st.session_state.step = 1
-                # Use st.experimental_set_query_params() to force a refresh
                 st.experimental_set_query_params(step="reset")
 
 # "Current" view to display the current summary of all users' selections
 elif menu == "Current":
     st.title("Current Selections of All Users")
-    download_temp_file_from_repo()
+    if st.button("Reload Selections"):
+        download_temp_file_from_repo()  # Download the latest version of the shared file
     current_df = load_current_selections()
     st.table(current_df)