Restore playing the scan pulse

control.lua

@@ -2406,6 +2406,8 @@ end
 
 --Called every tick. Used to call scheduled and repeated functions.
 function on_tick(event)
+   ScannerEntrypoint.on_tick()
+
    if global.scheduled_events[event.tick] then
       for _, to_call in pairs(global.scheduled_events[event.tick]) do
          _G[to_call[1]](to_call[2], to_call[3], to_call[4])

scripts/scanner/entrypoint.lua

@@ -39,6 +39,8 @@ local mod = {}
 ---@field scanner_cursor fa.scanner.CursorPos
 ---@field surface LuaSurface
 ---@field entries table<fa.scanner.Category, fa.scanner.SubcategoryData[]>
+---@field pending_refresh_counter number? used to delay refreshes by a tick.
+---@field pending_direction_filter defines.direction?
 
 ---@returns fa.scanner.GlobalPlayerState
 local function new_player_state(pindex)
@@ -53,6 +55,8 @@ local function new_player_state(pindex)
       },
       surface = player.surface,
       entries = {},
+      pending_refresh_counter = nil,
+      pending_direction_filter = nil,
    }
 
    return ret
@@ -81,10 +85,7 @@ local function apply_sort(player, pstate)
    end
 end
 
--- Given a pindex, refresh the player's local view over a scan.
----@param pindex number
----@param direction_filter defines.direction?
-function mod.do_refresh(pindex, direction_filter)
+local function do_refresh_after_sfx(pindex, direction_filter)
    -- Step 1: drop the player's data entirely, but keep the category cursor
    -- settings.  We can't patch subcategories back in: they're a result of the
    -- scan refresh.
@@ -202,6 +203,16 @@ is_chunk_charted(surface, { x = ex / 32, y = ey / 32 })
    end
 end
 
+-- Given a pindex, refresh the player's local view over a scan.
+---@param pindex number
+---@param direction_filter defines.direction?
+function mod.do_refresh(pindex, direction_filter)
+   game.get_player(pindex).play_sound({ path = "scanner-pulse" })
+
+   player_state[pindex].pending_refresh_counter = 2
+   player_state[pindex].pending_direction_filter = direction_filter
+end
+
 -- Sentinel tokens to represent not having moved, and to say which end.
 
 ---@alias fa.scanner.AT_BEGINNING "at_beginning"
@@ -523,4 +534,17 @@ function mod.on_surface_delete(index)
    SurfaceScanner.on_surface_delete(index)
 end
 
+function mod.on_tick()
+   for pindex, state in pairs(player_state) do
+      if state.pending_refresh_counter then
+         state.pending_refresh_counter = state.pending_refresh_counter - 1
+         if state.pending_refresh_counter == 0 then
+            do_refresh_after_sfx(pindex, state.pending_direction_filter)
+            state.pending_refresh_counter = nil
+            state.pending_direction_filter = nil
+         end
+      end
+   end
+end
+
 return mod