Added support for the Philips Hue Smart Button

Philips Hue Smart Button is exposed as a 'button' service in addition to
including the 'device_power' service. Development and inclusion of this
device driver was modelled after the 4-button-remote device driver

drivers/SmartThings/philips-hue/profiles/hue-smart-button.yml

@@ -0,0 +1,12 @@
+name: HueSmartButton
+components:
+  - id: main
+    capabilities:
+      - id: button
+        version: 1
+      - id: battery
+        version: 1
+      - id: refresh
+        version: 1
+    categories:
+    - name: RemoteController

drivers/SmartThings/philips-hue/src/disco/button.lua

@@ -121,10 +121,16 @@ function M.handle_discovered_device(
       )
       return
     end
+
     local button_profile_ref = ""
-    if button_description.num_buttons == 4 then
+    -- For Philips Hue Smart Button device which contains only 1 button
+    if button_description.num_buttons == 1 then
+      button_profile_ref = "HueSmartButton"
+      -- For Philips Hue Dimmer Remote which contains 4 buttons
+    elseif button_description.num_buttons == 4 then
       button_profile_ref = "4-button-remote"
     end
+
     local bridge_device = driver:get_device_by_dni(bridge_id) or {}
     local st_metadata = {
       type = "EDGE_CHILD",

drivers/SmartThings/philips-hue/src/disco/init.lua

@@ -24,6 +24,9 @@ local DOMAIN = "local"
 ---@field public api_keys table<string,string>
 ---@field public disco_api_instances table<string,PhilipsHueApi>
 ---@field public device_state_disco_cache table<string,table<string,any>>
+---@field public ServiceType string
+---@field public Domain string
+---@field public discovery_active boolean
 local HueDiscovery = {
   api_keys = {},
   disco_api_instances = {},
@@ -266,7 +269,8 @@ function HueDiscovery.search_bridge_for_supported_devices(driver, bridge_id, api
   local device_is_joined_to_bridge = {}
   for _, device_data in ipairs(devices.data or {}) do
     local primary_device_service
-    for _, svc_info in ipairs(device_data.services or {}) do
+    for _,
+    svc_info in ipairs(device_data.services or {}) do
       if is_device_service_supported(svc_info) then
         driver.services_for_device_rid[device_data.id] = driver.services_for_device_rid[device_data.id] or {}
         driver.services_for_device_rid[device_data.id][svc_info.rid] = svc_info.rtype

drivers/SmartThings/philips-hue/src/handlers/lifecycle_handlers/button.lua

@@ -55,7 +55,7 @@ function ButtonLifecycleHandlers.added(driver, device, parent_device_id, resourc
     button_rid_to_index_map[button_info.id] = 1
   end
 
-  if button_info.num_buttons and button_info.num_buttons > 1 then
+  if button_info.num_buttons then
     for var = 1, button_info.num_buttons do
       local button_key = string.format("button%s", var)
       local button_id_key = string.format("%s_id", button_key)
@@ -149,14 +149,12 @@ function ButtonLifecycleHandlers.init(driver, device)
     end
   end
   local svc_rids_for_device = driver.services_for_device_rid[hue_device_id] or {}
-  if button_info and
-      (button_info.num_buttons == nil or button_info.num_buttons == 1) and
-      not svc_rids_for_device[button_info.id]
+  if button_info and button_info.num_buttons == nil and not svc_rids_for_device[button_info.id]
   then
     svc_rids_for_device[button_info.id] = HueDeviceTypes.BUTTON
   end
 
-  if button_info and button_info.num_buttons and button_info.num_buttons > 1 then
+  if button_info and button_info.num_buttons then
     for var = 1, (button_info.num_buttons or 1) do
       local button_id_key = string.format("button%s_id", var)
       local button_id = button_info[button_id_key]

drivers/SmartThings/philips-hue/src/handlers/refresh_handlers.lua

@@ -354,4 +354,5 @@ device_type_refresh_handlers_map[HueDeviceTypes.BUTTON] = RefreshHandlers.do_ref
 device_type_refresh_handlers_map[HueDeviceTypes.CONTACT] = RefreshHandlers.do_refresh_contact_sensor
 device_type_refresh_handlers_map[HueDeviceTypes.LIGHT] = RefreshHandlers.do_refresh_light
 device_type_refresh_handlers_map[HueDeviceTypes.MOTION] = RefreshHandlers.do_refresh_motion_sensor
+
 return RefreshHandlers

drivers/SmartThings/philips-hue/src/hue_device_types.lua

@@ -13,7 +13,8 @@ local HueDeviceTypes = {
 }
 
 local SupportedNumberOfButtons = {
-  [4] = true
+  [1] = true, -- For Philips Hue Smart Button device which contains only 1 button
+  [4] = true, -- For Philips Hue Dimmer Remote which contains 4 buttons
 }
 
 local PrimaryDeviceTypes = {

drivers/SmartThings/philips-hue/src/utils.lua

@@ -50,6 +50,10 @@ function utils.safe_wrap_handler(handler)
   end
 end
 
+function utils.kelvin_to_mirek(kelvin) return 1000000 / kelvin end
+
+function utils.mirek_to_kelvin(mirek) return 1000000 / mirek end
+
 -- TODO: The Hue API itself doesn't have events for multipresses, however, it will
 -- emit batched "short release" eventsource on the SSE stream if they're close together.
 -- Right now the SSE stream handling is a relatively dumb pass-through that doesn't inspect
@@ -67,10 +71,6 @@ function utils.get_supported_button_values(event_values)
   return values
 end
 
-function utils.kelvin_to_mirek(kelvin) return 1000000 / kelvin end
-
-function utils.mirek_to_kelvin(mirek) return 1000000 / mirek end
-
 function utils.str_starts_with(str, start)
   return str:sub(1, #start) == start
 end