updating timestaps

app.py

@@ -49,15 +49,25 @@ if not server.is_active:
 MYSQL_URL = f"mysql+pymysql://{MYSQL_USER}:{MYSQL_PASSWORD}@{LOCAL_BIND_HOST}:{MYSQL_PORT}/{MYSQL_DB}"
 engine = create_engine(MYSQL_URL, pool_pre_ping=True, pool_recycle=3600)
 
+# --- Fetch timestamp range from DB ---
+def get_timestamp_range():
+    try:
+        query = text("SELECT MIN(timestamp) as min_ts, MAX(timestamp) as max_ts FROM gps_points")
+        result = engine.execute(query).fetchone()
+        return result["min_ts"], result["max_ts"]
+    except Exception as e:
+        st.error(f"Error fetching timestamp range: {e}")
+        return None, None
+
+min_ts, max_ts = get_timestamp_range()
+
 # --- Time range selection ---
 st.sidebar.header("Filter by Time Frame")
-start_date = st.sidebar.date_input("Start Date", datetime.now() - timedelta(days=1))
-end_date = st.sidebar.date_input("End Date", datetime.now())
-start_time = st.sidebar.time_input("Start Time", datetime.min.time())
-end_time = st.sidebar.time_input("End Time", datetime.max.time())
-
-from_datetime = datetime.combine(start_date, start_time)
-to_datetime = datetime.combine(end_date, end_time)
+if min_ts and max_ts:
+    start_datetime = st.sidebar.datetime_input("Start", min_ts, min_value=min_ts, max_value=max_ts)
+    end_datetime = st.sidebar.datetime_input("End", max_ts, min_value=min_ts, max_value=max_ts)
+else:
+    start_datetime = end_datetime = None
 
 # --- Load GPS Data ---
 def load_gps_data(from_ts, to_ts):
@@ -69,7 +79,9 @@ def load_gps_data(from_ts, to_ts):
         st.error(f"Error loading GPS data: {e}")
         return pd.DataFrame()
 
-gps_data = load_gps_data(from_datetime, to_datetime)
+gps_data = pd.DataFrame()
+if start_datetime and end_datetime:
+    gps_data = load_gps_data(start_datetime, end_datetime)
 
 # --- Display on Google Maps ---
 if not gps_data.empty:
@@ -173,4 +185,4 @@ if not gps_data.empty:
     </script>
     """, height=750)
 else:
-    st.info("No GPS data available for selected time frame.")
+    st.info("No GPS data available for selected time frame.")