Light significant changes + sensor tweaks (#45583)

homeassistant/components/light/significant_change.py

@@ -0,0 +1,71 @@
+"""Helper to test significant Light state changes."""
+from typing import Any, Optional
+
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.significant_change import (
+    check_numeric_changed,
+    either_one_none,
+)
+
+from . import (
+    ATTR_BRIGHTNESS,
+    ATTR_COLOR_TEMP,
+    ATTR_EFFECT,
+    ATTR_HS_COLOR,
+    ATTR_WHITE_VALUE,
+)
+
+
+@callback
+def async_check_significant_change(
+    hass: HomeAssistant,
+    old_state: str,
+    old_attrs: dict,
+    new_state: str,
+    new_attrs: dict,
+    **kwargs: Any,
+) -> Optional[bool]:
+    """Test if state significantly changed."""
+    if old_state != new_state:
+        return True
+
+    if old_attrs.get(ATTR_EFFECT) != new_attrs.get(ATTR_EFFECT):
+        return True
+
+    old_color = old_attrs.get(ATTR_HS_COLOR)
+    new_color = new_attrs.get(ATTR_HS_COLOR)
+
+    if either_one_none(old_color, new_color):
+        return True
+
+    if old_color and new_color:
+        # Range 0..360
+        if check_numeric_changed(old_color[0], new_color[0], 5):
+            return True
+
+        # Range 0..100
+        if check_numeric_changed(old_color[1], new_color[1], 3):
+            return True
+
+    if check_numeric_changed(
+        old_attrs.get(ATTR_BRIGHTNESS), new_attrs.get(ATTR_BRIGHTNESS), 3
+    ):
+        return True
+
+    if check_numeric_changed(
+        # Default range 153..500
+        old_attrs.get(ATTR_COLOR_TEMP),
+        new_attrs.get(ATTR_COLOR_TEMP),
+        5,
+    ):
+        return True
+
+    if check_numeric_changed(
+        # Range 0..255
+        old_attrs.get(ATTR_WHITE_VALUE),
+        new_attrs.get(ATTR_WHITE_VALUE),
+        5,
+    ):
+        return True
+
+    return False