Added timer class

functions/timer.py

@@ -0,0 +1,26 @@
+import asyncio
+
+class Timer():
+    def __init__(self, minutes, seconds):
+        self.minutes = minutes
+        self.seconds = seconds
+        self.ended = True
+
+    def start(self):
+        self.ended = False
+        self.timer_task = asyncio.ensure_future(self.update())
+
+    def stop(self):
+        self.timer_task.cancel()
+        self.endend = True
+
+    async def update(self):
+        while self.ended == False:
+            await asyncio.sleep(1)
+            if (self.minutes > 0 and self.seconds == 0):
+                self.minutes -= 1
+                self.seconds = 59
+            elif (self.seconds > 0):
+                self.seconds -= 1
+                if (self.minutes == 0 and self.seconds == 0):
+                    self.ended = True