new module - game pause

this module pauses the game whenever the last player leaves the game, ensuring that rcon does not progress the map.

control.lua

@@ -6,6 +6,7 @@ _DUMP_ENV = false
 require 'utils.server'
 require 'utils.server_commands'
 require 'utils.utils'
+require 'utils.pause_game'
 require 'utils.table'
 require 'utils.freeplay'
 require 'utils.datastore.server_ups'

utils/pause_game.lua

@@ -0,0 +1,35 @@
+local Event = require 'utils.event'
+
+local function halt_game()
+    game.tick_paused = true
+end
+
+local function resume_game()
+    game.tick_paused = false
+end
+
+local function player_left()
+    local player_count = #game.connected_players
+
+    if player_count == 0 then
+        halt_game()
+    end
+end
+
+local function player_joined()
+    resume_game()
+end
+
+Event.add(
+    defines.events.on_player_joined_game,
+    function()
+        player_joined()
+    end
+)
+
+Event.add(
+    defines.events.on_player_left_game,
+    function()
+        player_left()
+    end
+)