Merge branch 'watchdog' into for_webui

# Conflicts:
#	src-python/webui_controller.py
#	src-python/webui_mainloop.py

src-python/models/watchdog/watchdog.py

@@ -0,0 +1,22 @@
+from typing import Callable
+import time
+from utils import printLog
+
+class Watchdog:
+    def __init__(self, timeout:int=60, interval:int=20):
+        self.timeout = timeout
+        self.interval = interval
+        self.last_feed_time = time.time()
+
+    def feed(self):
+        self.last_feed_time = time.time()
+
+    def setCallback(self, callback):
+        self.callback = callback
+
+    def start(self):
+        if time.time() - self.last_feed_time > self.timeout:
+            printLog("Watchdog timeout! Shutting down...")
+            if isinstance(self.callback, Callable):
+                self.callback()
+        time.sleep(self.interval)