gistfile1.lua

local KICK_TIME = 300 -- 5 minutes

local player_info = { }

local timer = 0
minetest.register_globalstep(function(dtime)
	timer = timer + dtime
	if timer < 5 then return end
	for _, pl in ipairs(minetest.get_connected_players()) do
		local pos = pl:getpos()
		if not player_info[pl] then
			player_info[pl] = {
				pos = pos,
				timer = 0,
			}
		end
		local d = vector.distance(player_info[pl].pos.x, pos)
		if d < 0.1 then
			player_info[pl].timer = player_info[pl].timer + timer
			if player_info[pl].timer >= KICK_TIME then
				minetest.kick_player(pl:get_player_name(), "Kicked for idling.")
			end
		else
			player_info[pl].timer = 0
		end
		player_info[pl].pos = pos
	end
	timer = 0
end)

minetest.register_on_leaveplayer(function(player)
	player_info[player] = nil
end)