Player state

hopper/countdown_timer.py

@@ -0,0 +1,25 @@
+import time
+from threading import Event, Thread
+from typing import Callable, Optional
+
+
+class CountdownTimer(Thread):
+    def __init__(
+        self, seconds: int, callback: Optional[Callable[[], None]] = None
+    ) -> None:
+        self.seconds = seconds
+        self.stop_event = Event()
+        self.callback = callback
+        super().__init__()
+
+    def run(self) -> None:
+        cnt = self.seconds
+        while cnt > 0 and not self.stop_event.is_set():
+            cnt -= 1
+            time.sleep(1)
+
+        if cnt == 0 and self.callback:
+            self.callback()
+
+    def stop(self) -> None:
+        self.stop_event.set()