Make SimpliSafe entities unavailable when wifi is lost (#32154)

* Make SimpliSafe entities unavailable when wifi is lost

* Remove online status from REST API

* Comments

* Mispelling

homeassistant/components/simplisafe/__init__.py

@@ -6,6 +6,8 @@
 from simplipy.errors import InvalidCredentialsError, SimplipyError
 from simplipy.websocket import (
     EVENT_CAMERA_MOTION_DETECTED,
+    EVENT_CONNECTION_LOST,
+    EVENT_CONNECTION_RESTORED,
     EVENT_DOORBELL_DETECTED,
     EVENT_ENTRY_DETECTED,
     EVENT_LOCK_LOCKED,
@@ -528,7 +530,10 @@ def __init__(self, simplisafe, system, name, *, serial=None):
         self._online = True
         self._simplisafe = simplisafe
         self._system = system
-        self.websocket_events_to_listen_for = []
+        self.websocket_events_to_listen_for = [
+            EVENT_CONNECTION_LOST,
+            EVENT_CONNECTION_RESTORED,
+        ]
 
         if serial:
             self._serial = serial
@@ -655,13 +660,32 @@ async def async_update(self):
                 ATTR_LAST_EVENT_TIMESTAMP: last_websocket_event.timestamp,
             }
         )
-        self.async_update_from_websocket_event(last_websocket_event)
+        self._async_internal_update_from_websocket_event(last_websocket_event)
 
     @callback
     def async_update_from_rest_api(self):
         """Update the entity with the provided REST API data."""
         pass
 
+    @callback
+    def _async_internal_update_from_websocket_event(self, event):
+        """Check for connection events and set offline appropriately.
+
+        Should not be called directly.
+        """
+        if event.event_type == EVENT_CONNECTION_LOST:
+            self._online = False
+        elif event.event_type == EVENT_CONNECTION_RESTORED:
+            self._online = True
+
+        # It's uncertain whether SimpliSafe events will still propagate down the
+        # websocket when the base station is offline. Just in case, we guard against
+        # further action until connection is restored:
+        if not self._online:
+            return
+
+        self.async_update_from_websocket_event(event)
+
     @callback
     def async_update_from_websocket_event(self, event):
         """Update the entity with the provided websocket API data."""

homeassistant/components/simplisafe/alarm_control_panel.py

@@ -190,11 +190,6 @@ async def async_alarm_arm_away(self, code=None):
     @callback
     def async_update_from_rest_api(self):
         """Update the entity with the provided REST API data."""
-        if self._system.state == SystemStates.error:
-            self._online = False
-            return
-        self._online = True
-
         if self._system.version == 3:
             self._attrs.update(
                 {

homeassistant/components/simplisafe/lock.py

@@ -70,11 +70,6 @@ async def async_unlock(self, **kwargs):
     @callback
     def async_update_from_rest_api(self):
         """Update the entity with the provided REST API data."""
-        if self._lock.offline or self._lock.disabled:
-            self._online = False
-            return
-
-        self._online = True
         self._attrs.update(
             {
                 ATTR_LOCK_LOW_BATTERY: self._lock.lock_low_battery,