Random fixes (#1996)

* OwnTracks handle malformed data better

Fixes #1991 .

* Remove dependency for util.dt

homeassistant/components/device_tracker/owntracks.py

@@ -101,7 +101,7 @@ def setup_scanner(hass, config, see):
             """Execute enter event."""
             zone = hass.states.get("zone.{}".format(location))
             with LOCK:
-                if zone is None and data['t'] == 'b':
+                if zone is None and data.get('t') == 'b':
                     # Not a HA zone, and a beacon so assume mobile
                     beacons = MOBILE_BEACONS_ACTIVE[dev_id]
                     if location not in beacons:

homeassistant/util/dt.py

@@ -1,5 +1,4 @@
 """Provides helper methods to handle the time in HA."""
-import calendar
 import datetime as dt
 import re
 
@@ -62,13 +61,13 @@ def as_utc(dattim):
 
 def as_timestamp(dt_value):
     """Convert a date/time into a unix time (seconds since 1970)."""
-    if hasattr(dt_value, "utctimetuple"):
+    if hasattr(dt_value, "timestamp"):
         parsed_dt = dt_value
     else:
         parsed_dt = parse_datetime(str(dt_value))
         if not parsed_dt:
             raise ValueError("not a valid date/time.")
-    return calendar.timegm(parsed_dt.utctimetuple())
+    return parsed_dt.timestamp()
 
 
 def as_local(dattim):