Add last_online and level attribute to steam online (#30321)

* Steam Online: Add last_online and Level attributes

* Steam Online: Add last_online and Level attributes

* Fixes from comments on initial pull request

* Push attributes only if they are not None

homeassistant/components/steam_online/sensor.py

@@ -1,6 +1,7 @@
 """Sensor for Steam account status."""
 from datetime import timedelta
 import logging
+from time import mktime
 
 import steam
 import voluptuous as vol
@@ -11,6 +12,7 @@ from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.event import async_track_time_interval
+from homeassistant.util.dt import utc_from_timestamp
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -70,7 +72,12 @@ class SteamSensor(Entity):
         self._steamod = steamod
         self._account = account
         self._profile = None
-        self._game = self._state = self._name = self._avatar = None
+        self._game = None
+        self._state = None
+        self._name = None
+        self._avatar = None
+        self._last_online = None
+        self._level = None
 
     @property
     def name(self):
@@ -107,11 +114,19 @@ class SteamSensor(Entity):
             }.get(self._profile.status, STATE_OFFLINE)
             self._name = self._profile.persona
             self._avatar = self._profile.avatar_medium
+            self._last_online = self._get_last_online()
+            self._level = self._profile.level
         except self._steamod.api.HTTPTimeoutError as error:
             _LOGGER.warning(error)
-            self._game = self._state = self._name = self._avatar = None
+            self._game = None
+            self._state = None
+            self._name = None
+            self._avatar = None
+            self._last_online = None
+            self._level = None
 
     def _get_current_game(self):
+        """Gather current game name from APP ID."""
         game_id = self._profile.current_game[0]
         game_extra_info = self._profile.current_game[2]
 
@@ -140,10 +155,26 @@ class SteamSensor(Entity):
         _LOGGER.error("Unable to find name of app with ID=%s", game_id)
         return repr(game_id)
 
+    def _get_last_online(self):
+        """Convert last_online from the steam module into timestamp UTC."""
+        last_online = utc_from_timestamp(mktime(self._profile.last_online))
+
+        if last_online:
+            return last_online
+
+        return None
+
     @property
     def device_state_attributes(self):
         """Return the state attributes."""
-        return {"game": self._game} if self._game else None
+        attr = {}
+        if self._game is not None:
+            attr["game"] = self._game
+        if self._last_online is not None:
+            attr["last_online"] = self._last_online
+        if self._level is not None:
+            attr["level"] = self._level
+        return attr
 
     @property
     def entity_picture(self):