performance improvement

mods/CORE/mcl_commands/register/list.lua

@@ -1,14 +1,52 @@
 local S = minetest.get_translator(minetest.get_current_modname())
 
+--[[
 minetest.register_chatcommand("list", {
 	description = S("Show who is logged on"),
 	params = "",
 	privs = {},
 	func = function(name)
-		local players = ""
-		for _, player in ipairs(minetest.get_connected_players()) do
-			players = players..player:get_player_name().."\n"
+		--local players = ""
+		--for _, player in ipairs(minetest.get_connected_players()) do
+		--	players = players..player:get_player_name().."\n"
+		--end
+		--minetest.chat_send_player(name, players)
+		local player_list = minetest.get_connected_players()
+		local header = S("There are @1/@2 players online:", #player_list, minetest.settings:get("max_users") or "unknown").."\n"
+		local players = {}
+		for _, player in ipairs(player_list) do
+			table.insert(players, player:get_player_name())
 		end
-		minetest.chat_send_player(name, players)
+		return true, header..table.concat(players, ", ")
 	end
 })
+]]
+
+local max_users = minetest.settings:get("max_users") or "unknown" --TODO: check if the setting is dynamic in mc
+local playersstring = ""
+
+local function generate_player_list()
+	local player_list = minetest.get_connected_players()
+	local header = S("There are @1/@2 players online:", #player_list, max_users).."\n"
+	local players = {}
+	for _, player in ipairs(player_list) do
+		table.insert(players, player:get_player_name())
+	end
+	playersstring = header..table.concat(players, ", ")
+end
+
+minetest.register_on_joinplayer(function(player)
+	generate_player_list()
+end)
+
+minetest.register_on_leaveplayer(function(player)
+	generate_player_list()
+end)
+
+mcl_commands.register_basic_command("list", {
+	description = S("Show who is logged on"),
+	params = nil,
+	func = function(name)
+		return true, playersstring
+	end,
+})