Product purchase

hopper/countdown_timer.py

@@ -5,7 +5,10 @@ from typing import Callable, Optional
 
 class CountdownTimer(Thread):
     def __init__(
-        self, seconds: int, timer_tick_callback: Optional[Callable[[int], None]] = None, timer_done_callback: Optional[Callable[[], None]] = None
+        self,
+        seconds: int,
+        timer_tick_callback: Optional[Callable[[int], None]] = None,
+        timer_done_callback: Optional[Callable[[], None]] = None,
     ) -> None:
         self.seconds = seconds
         self.stop_event = Event()
@@ -18,7 +21,7 @@ class CountdownTimer(Thread):
         while time_left and not self.stop_event.is_set():
             time.sleep(1)
             time_left -= 1
-            if self.timer_tick_callback:
+            if self.timer_tick_callback and not self.stop_event.is_set():
                 self.timer_tick_callback(time_left)
 
         if time_left == 0 and self.timer_done_callback: