refactor: Remove unneeded wrapper functions when specifying callbacks

These wrappers can be moved up to where the callback itself is defined
instead of having to wrap the call manually. This also works a lot nicer
now that it is possible to provide multiple callback functions.

automation_lib/src/mqtt.rs

@@ -28,7 +28,13 @@ impl mlua::UserData for WrappedAsyncClient {
         methods.add_async_method(
             "send_message",
             async |_lua, this, (topic, message): (String, mlua::Value)| {
-                let message = serde_json::to_string(&message).unwrap();
+                // serde_json converts nil => "null", but we actually want nil to send an empty
+                // message
+                let message = if message.is_nil() {
+                    "".into()
+                } else {
+                    serde_json::to_string(&message).unwrap()
+                };
 
                 debug!("message = {message}");
 

config.lua

@@ -425,49 +425,57 @@ device_manager:add(HueSwitch.new({
 local hallway_light_automation = {
 	timeout = Timeout.new(),
 	forced = false,
-	switch_callback = function(self, on)
-		self.timeout:cancel()
-		self.group.set_on(on)
-		self.forced = on
-	end,
-	door_callback = function(self, open)
-		if open then
+	switch_callback = function(self)
+		return function(_, on)
 			self.timeout:cancel()
-
-			self.group.set_on(true)
-		elseif not self.forced then
-			self.timeout:start(debug and 10 or 2 * 60, function()
-				if self.trash == nil or self.trash:open_percent() == 0 then
-					self.group.set_on(false)
-				end
-			end)
+			self.group.set_on(on)
+			self.forced = on
 		end
 	end,
-	trash_callback = function(self, open)
-		if open then
-			self.group.set_on(true)
-		else
-			if
-				not self.timeout:is_waiting()
-				and (self.door == nil or self.door:open_percent() == 0)
-				and not self.forced
-			then
-				self.group.set_on(false)
+	door_callback = function(self)
+		return function(_, open)
+			if open then
+				self.timeout:cancel()
+
+				self.group.set_on(true)
+			elseif not self.forced then
+				self.timeout:start(debug and 10 or 2 * 60, function()
+					if self.trash == nil or self.trash:open_percent() == 0 then
+						self.group.set_on(false)
+					end
+				end)
 			end
 		end
 	end,
-	light_callback = function(self, on)
-		if
-			on
-			and (self.trash == nil or self.trash:open_percent()) == 0
-			and (self.door == nil or self.door:open_percent() == 0)
-		then
-			-- If the door and trash are not open, that means the light got turned on manually
-			self.timeout:cancel()
-			self.forced = true
-		elseif not on then
-			-- The light is never forced when it is off
-			self.forced = false
+	trash_callback = function(self)
+		return function(_, open)
+			if open then
+				self.group.set_on(true)
+			else
+				if
+					not self.timeout:is_waiting()
+					and (self.door == nil or self.door:open_percent() == 0)
+					and not self.forced
+				then
+					self.group.set_on(false)
+				end
+			end
+		end
+	end,
+	light_callback = function(self)
+		return function(_, state)
+			if
+				state.on
+				and (self.trash == nil or self.trash:open_percent()) == 0
+				and (self.door == nil or self.door:open_percent() == 0)
+			then
+				-- If the door and trash are not open, that means the light got turned on manually
+				self.timeout:cancel()
+				self.forced = true
+			elseif not state.on then
+				-- The light is never forced when it is off
+				self.forced = false
+			end
 		end
 	end,
 }
@@ -477,9 +485,7 @@ local hallway_storage = LightBrightness.new({
 	room = "Hallway",
 	topic = mqtt_z2m("hallway/storage"),
 	client = mqtt_client,
-	callback = function(_, state)
-		hallway_light_automation:light_callback(state.state)
-	end,
+	callback = hallway_light_automation:light_callback(),
 })
 turn_off_when_away(hallway_storage)
 device_manager:add(hallway_storage)
@@ -504,13 +510,12 @@ hallway_light_automation.group = {
 	end,
 }
 
-local frontdoor_presence = {
-	timeout = Timeout.new(),
-}
-setmetatable(frontdoor_presence, {
-	__call = function(self, open)
+local function presence(duration)
+	local timeout = Timeout.new()
+
+	return function(_, open)
 		if open then
-			self.timeout:cancel()
+			timeout:cancel()
 
 			if not presence_system:overall_presence() then
 				mqtt_client:send_message(mqtt_automation("presence/contact/frontdoor"), {
@@ -519,21 +524,19 @@ setmetatable(frontdoor_presence, {
 				})
 			end
 		else
-			self.timeout:start(debug and 10 or 15 * 60, function()
-				mqtt_client:send_message(mqtt_automation("presence/contact/frontdoor"), {})
+			timeout:start(duration, function()
+				mqtt_client:send_message(mqtt_automation("presence/contact/frontdoor"), nil)
 			end)
 		end
-	end,
-})
+	end
+end
 
 device_manager:add(IkeaRemote.new({
 	name = "Remote",
 	room = "Hallway",
 	client = mqtt_client,
 	topic = mqtt_z2m("hallway/remote"),
-	callback = function(_, on)
-		hallway_light_automation:switch_callback(on)
-	end,
+	callback = hallway_light_automation:switch_callback(),
 	battery_callback = check_battery,
 }))
 local hallway_frontdoor = ContactSensor.new({
@@ -546,10 +549,10 @@ local hallway_frontdoor = ContactSensor.new({
 		topic = mqtt_automation("presence/contact/frontdoor"),
 		timeout = debug and 10 or 15 * 60,
 	},
-	callback = function(_, open)
-		hallway_light_automation:door_callback(open)
-		frontdoor_presence(open)
-	end,
+	callback = {
+		presence(debug and 10 or 15 * 60),
+		hallway_light_automation:door_callback(),
+	},
 	battery_callback = check_battery,
 })
 device_manager:add(hallway_frontdoor)
@@ -561,9 +564,7 @@ local hallway_trash = ContactSensor.new({
 	sensor_type = "Drawer",
 	topic = mqtt_z2m("hallway/trash"),
 	client = mqtt_client,
-	callback = function(_, open)
-		hallway_light_automation:trash_callback(open)
-	end,
+	callback = hallway_light_automation:trash_callback(),
 	battery_callback = check_battery,
 })
 device_manager:add(hallway_trash)