Hallway lights automation

src/HomeAssistant/Controller/Hallway.hs

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+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE Arrows #-}
+module HomeAssistant.Controller.Hallway where
+
+import HomeAssistant.Controller (Presence (..), HASS, motion, motionToPresence, traceEvent, callServiceDyn, light, Target (..), Light (..))
+import AFRP (Event (..))
+import qualified AFRP
+import Data.Aeson (Value)
+import Control.Arrow ((>>>), Arrow (..), returnA)
+import Data.Time (LocalTime(..), TimeOfDay (..))
+
+
+
+hallwayPresence :: HASS (Event Value) Presence
+hallwayPresence = motion "binary_sensor.hallway_movement_occupancy" >>> motionToPresence 500
+
+data Lights = LightsOn | LightsOff
+  deriving (Show)
+
+eventLights :: HASS Presence (Event Lights)
+eventLights = AFRP.changes >>> arr (fmap presenceLights)
+  where
+    presenceLights Occupied = LightsOn
+    presenceLights Unoccupied = LightsOff
+
+hallwayLightsController :: HASS (Event Value) ()
+hallwayLightsController = proc x -> do
+  now <- AFRP.currentTime -< ()
+  p <- hallwayPresence -< x
+  ev <- eventLights -< p
+  traceEvent -< ev
+  case ev of
+       -- The lights entity is a "group of lights" in hass
+       Event LightsOn | lightsAllowed now -> callServiceDyn (light [EntityId "light.hallway_lights"]) -< On Nothing
+       Event LightsOff -> callServiceDyn (light [EntityId "light.hallway_lights"]) -< Off
+       _ -> returnA -< ()
+  where
+    lightsAllowed (LocalTime _ tod) = not (tod > TimeOfDay 1 45 0 && tod < TimeOfDay 5 0 0)