Introduced concept of pollables

src/mash/bridges/zigbee2mqtt/entities/contact_sensor_z2m.py

@@ -0,0 +1,5 @@
+from mash.core.entities.contact_sensor import ContactSensor
+
+
+class ContactSensorZ2M(ContactSensor):
+    

src/mash/core/entities/contact_sensor.py

@@ -18,4 +18,15 @@ class ContactSensor(Entity):
     def is_closed(self) -> bool:
         return self._has_contact
 
+    def is_open(self) -> bool:
+        return not self._has_contact
+
+    def is_closed_for_seconds(self, duration_in_seconds: float) -> bool:
+        # TODO
+        pass
+
+    def is_open_for_seconds(self, duration_in_seconds: float) -> bool:
+        # TODO
+        pass
+
     # TODO: Update state

src/mash/core/entities/entity.py

@@ -16,6 +16,7 @@ class Entity:
         self._room = room
         self._device_type = device_type
         self._groups = set(groups)
+        self._pollable = False
 
     @property
     def id(self) -> str:
@@ -37,5 +38,13 @@ class Entity:
     def groups(self) -> set[str]:
         return self._groups
 
+    @property
+    def is_pollable(self) -> bool:
+        return self._pollable
+
+    def _poll_(self) -> None:
+        """Polls the bridge for the latest state."""
+        pass
+
     def __str__(self) -> str:
         return f"{self.name} [{self.id}, type {self.device_type}, room {self.room}, in {len(self.groups)} groups]"