Add demand window sensor for amberelectric (#121356)

homeassistant/components/amberelectric/binary_sensor.py

@@ -71,6 +71,18 @@ class AmberPriceSpikeBinarySensor(AmberPriceGridSensor):
         }
 
 
+class AmberDemandWindowBinarySensor(AmberPriceGridSensor):
+    """Sensor to show whether demand window is active."""
+
+    @property
+    def is_on(self) -> bool | None:
+        """Return true if the binary sensor is on."""
+        grid = self.coordinator.data["grid"]
+        if "demand_window" in grid:
+            return grid["demand_window"]  # type: ignore[no-any-return]
+        return None
+
+
 async def async_setup_entry(
     hass: HomeAssistant,
     entry: ConfigEntry,
@@ -83,6 +95,14 @@ async def async_setup_entry(
         key="price_spike",
         name=f"{entry.title} - Price Spike",
     )
-    async_add_entities(
-        [AmberPriceSpikeBinarySensor(coordinator, price_spike_description)]
+    demand_window_description = BinarySensorEntityDescription(
+        key="demand_window",
+        name=f"{entry.title} - Demand Window",
+        translation_key="demand_window",
+    )
+    async_add_entities(
+        [
+            AmberPriceSpikeBinarySensor(coordinator, price_spike_description),
+            AmberDemandWindowBinarySensor(coordinator, demand_window_description),
+        ]
     )