Support for on_off_gradually v2+ (#793)

Previously, only v1 of on_off_gradually is supported, and the newer versions are not backwards compatible.
This PR adds support for the newer versions of the component, and implements `number` type for `Feature` to expose the transition time selection.
This also adds a new `supported_version` property to the main module API.

kasa/feature.py

@@ -14,6 +14,7 @@ class FeatureType(Enum):
     BinarySensor = auto()
     Switch = auto()
     Button = auto()
+    Number = auto()
 
 
 @dataclass
@@ -35,6 +36,12 @@ class Feature:
     #: Type of the feature
     type: FeatureType = FeatureType.Sensor
 
+    # Number-specific attributes
+    #: Minimum value
+    minimum_value: int = 0
+    #: Maximum value
+    maximum_value: int = 2**16  # Arbitrary max
+
     @property
     def value(self):
         """Return the current value."""
@@ -47,5 +54,12 @@ class Feature:
         """Set the value."""
         if self.attribute_setter is None:
             raise ValueError("Tried to set read-only feature.")
+        if self.type == FeatureType.Number:  # noqa: SIM102
+            if value < self.minimum_value or value > self.maximum_value:
+                raise ValueError(
+                    f"Value {value} out of range "
+                    f"[{self.minimum_value}, {self.maximum_value}]"
+                )
+
         container = self.container if self.container is not None else self.device
         return await getattr(container, self.attribute_setter)(value)

kasa/smart/modules/devicemodule.py

@@ -15,7 +15,7 @@ class DeviceModule(SmartModule):
             "get_device_info": None,
         }
         # Device usage is not available on older firmware versions
-        if self._device._components[self.REQUIRED_COMPONENT] >= 2:
+        if self.supported_version >= 2:
             query["get_device_usage"] = None
 
         return query

kasa/smart/modules/lighttransitionmodule.py

@@ -1,6 +1,7 @@
 """Module for smooth light transitions."""
 from typing import TYPE_CHECKING
 
+from ...exceptions import KasaException
 from ...feature import Feature, FeatureType
 from ..smartmodule import SmartModule
 
@@ -13,29 +14,152 @@ class LightTransitionModule(SmartModule):
 
     REQUIRED_COMPONENT = "on_off_gradually"
     QUERY_GETTER_NAME = "get_on_off_gradually_info"
+    MAXIMUM_DURATION = 60
 
     def __init__(self, device: "SmartDevice", module: str):
         super().__init__(device, module)
+        self._create_features()
+
+    def _create_features(self):
+        """Create features based on the available version."""
+        icon = "mdi:transition"
+        if self.supported_version == 1:
             self._add_feature(
                 Feature(
-                device=device,
+                    device=self._device,
                     container=self,
                     name="Smooth transitions",
-                icon="mdi:transition",
+                    icon=icon,
-                attribute_getter="enabled",
+                    attribute_getter="enabled_v1",
-                attribute_setter="set_enabled",
+                    attribute_setter="set_enabled_v1",
                     type=FeatureType.Switch,
                 )
             )
+        elif self.supported_version >= 2:
+            # v2 adds separate on & off states
+            # v3 adds max_duration
+            # TODO: note, hardcoding the maximums for now as the features get
+            #  initialized before the first update.
+            self._add_feature(
+                Feature(
+                    self._device,
+                    "Smooth transition on",
+                    container=self,
+                    attribute_getter="turn_on_transition",
+                    attribute_setter="set_turn_on_transition",
+                    icon=icon,
+                    type=FeatureType.Number,
+                    maximum_value=self.MAXIMUM_DURATION,
+                )
+            )  # self._turn_on_transition_max
+            self._add_feature(
+                Feature(
+                    self._device,
+                    "Smooth transition off",
+                    container=self,
+                    attribute_getter="turn_off_transition",
+                    attribute_setter="set_turn_off_transition",
+                    icon=icon,
+                    type=FeatureType.Number,
+                    maximum_value=self.MAXIMUM_DURATION,
+                )
+            )  # self._turn_off_transition_max
 
-    def set_enabled(self, enable: bool):
+    @property
+    def _turn_on(self):
+        """Internal getter for turn on settings."""
+        if "on_state" not in self.data:
+            raise KasaException(
+                f"Unsupported for {self.REQUIRED_COMPONENT} v{self.supported_version}"
+            )
+
+        return self.data["on_state"]
+
+    @property
+    def _turn_off(self):
+        """Internal getter for turn off settings."""
+        if "off_state" not in self.data:
+            raise KasaException(
+                f"Unsupported for {self.REQUIRED_COMPONENT} v{self.supported_version}"
+            )
+
+        return self.data["off_state"]
+
+    def set_enabled_v1(self, enable: bool):
         """Enable gradual on/off."""
         return self.call("set_on_off_gradually_info", {"enable": enable})
 
     @property
-    def enabled(self) -> bool:
+    def enabled_v1(self) -> bool:
         """Return True if gradual on/off is enabled."""
         return bool(self.data["enable"])
 
-    def __cli_output__(self):
+    @property
-        return f"Gradual on/off enabled: {self.enabled}"
+    def turn_on_transition(self) -> int:
+        """Return transition time for turning the light on.
+
+        Available only from v2.
+        """
+        return self._turn_on["duration"]
+
+    @property
+    def _turn_on_transition_max(self) -> int:
+        """Maximum turn on duration."""
+        # v3 added max_duration, we default to 60 when it's not available
+        return self._turn_on.get("max_duration", 60)
+
+    async def set_turn_on_transition(self, seconds: int):
+        """Set turn on transition in seconds.
+
+        Setting to 0 turns the feature off.
+        """
+        if seconds > self._turn_on_transition_max:
+            raise ValueError(
+                f"Value {seconds} out of range, max {self._turn_on_transition_max}"
+            )
+
+        if seconds <= 0:
+            return await self.call(
+                "set_on_off_gradually_info",
+                {"on_state": {**self._turn_on, "enable": False}},
+            )
+
+        return await self.call(
+            "set_on_off_gradually_info",
+            {"on_state": {**self._turn_on, "duration": seconds}},
+        )
+
+    @property
+    def turn_off_transition(self) -> int:
+        """Return transition time for turning the light off.
+
+        Available only from v2.
+        """
+        return self._turn_off["duration"]
+
+    @property
+    def _turn_off_transition_max(self) -> int:
+        """Maximum turn on duration."""
+        # v3 added max_duration, we default to 60 when it's not available
+        return self._turn_off.get("max_duration", 60)
+
+    async def set_turn_off_transition(self, seconds: int):
+        """Set turn on transition in seconds.
+
+        Setting to 0 turns the feature off.
+        """
+        if seconds > self._turn_off_transition_max:
+            raise ValueError(
+                f"Value {seconds} out of range, max {self._turn_off_transition_max}"
+            )
+
+        if seconds <= 0:
+            return await self.call(
+                "set_on_off_gradually_info",
+                {"off_state": {**self._turn_off, "enable": False}},
+            )
+
+        return await self.call(
+            "set_on_off_gradually_info",
+            {"off_state": {**self._turn_on, "duration": seconds}},
+        )

kasa/smart/smartmodule.py

@@ -80,3 +80,8 @@ class SmartModule(Module):
             return next(iter(filtered_data.values()))
 
         return filtered_data
+
+    @property
+    def supported_version(self) -> int:
+        """Return version supported by the device."""
+        return self._device._components[self.REQUIRED_COMPONENT]