death_timer/init.lua

local storage = minetest.get_mod_storage()

local players
local player_objs = {}
local death_timer = {}

local timeout = 5
local initial_timeout = 5
local timeout_reduce_loop = 3600
local timeout_reduce_rate = 1

players = minetest.deserialize(storage:get_string("players"))

if not players then
	players = {}
	storage:set_string("players", minetest.serialize(players))
end

minetest.register_on_joinplayer(function(player)
	local name = player:get_player_name()
	local p = players[name]
	if p and p.time > 1 then
		if player and player_objs[name] then
			local pos = player:get_pos()
			player:set_attach(player_objs[name], "", {x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
			player_objs[name]:set_pos(pos)
		elseif player and not player_objs[name] then
			local pos = player:get_pos()
			player_objs[name] = minetest.add_entity(pos, "death_timer:death")
			player:set_attach(player_objs[name], "", {x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
			player_objs[name]:set_pos(pos)
		end
		player:set_properties({
			visual_size    = {x = 0, y = 0},
			["selectionbox"] = {0, 0, 0, 0, 0, 0},
		})
		death_timer.loop(name)
	end
end)

minetest.register_entity("death_timer:death", {
	initial_properties = {
		is_visible = false
	},
	on_activate = function(staticdata, dtime_s)
		
	end
})

function death_timer.reduce_loop()
	for k, v in pairs(players) do
		if players[k].longtime > 0 then
			players[k].longtime = players[k].longtime - timeout_reduce_rate
			if players[k].longtime < 0 then
				minetest.after(0, function(k) players[k] = nil end, k)
			end
		else
			minetest.after(0, function(k) players[k] = nil end, k)
		end
	end
	minetest.after(1, function() storage:set_string("players", minetest.serialize(players)) end)
	minetest.after(timeout_reduce_loop, death_timer.reduce_loop)
end

function death_timer.loop(name)
	local p = players[name]
	p.time = p.time - 1
	if p.time < 1 then
		local formspec = "size[11,5.5]bgcolor[#320000b4;true]" ..
		"label[4.85,1.35;Wait" ..
		"]button_exit[4,3;3,0.5;death_button;Play" .."]"
		minetest.show_formspec(name, "death_timer:death_screen", formspec)
		minetest.after(0, function(players, name) 
			local p = minetest.get_player_by_name(name)
			if p then
				p:set_detach()
				player_objs[name]:remove()
				player_objs[name] = nil
			end
		end, players, name)

		if p.interact ~= nil then
			local privs = minetest.get_player_privs(name)
			privs.interact = p.interact
			p.interact = nil
			minetest.set_player_privs(name, privs)
		end

		if p.properties then
			local player = minetest.get_player_by_name(name)
			player:set_properties(p.properties)
			p.properties = nil
		end

		p.time = nil

		p.pos = nil

		players[name] = p

		storage:set_string("players", minetest.serialize(players))
	else
		local formspec = "size[11,5.5]bgcolor[#320000b4;true]" ..
			"label[4.85,1.35;Wait" ..
			"]button[4,3;3,0.5;death_button;" .. p.time .."]"
		minetest.show_formspec(name, "death_timer:death_screen", formspec)
		minetest.after(1, death_timer.loop, name)
	end
end

minetest.register_on_leaveplayer(function(player)
	local name = player:get_player_name()
	if player_objs[name] then
		player:set_detach()
		player_objs[name]:remove()
		player_objs[name] = nil
	end
end)

minetest.register_on_dieplayer(function(player)
	local name = player:get_player_name()
	local privs = minetest.get_player_privs(name)
	local pos = player:get_pos()

	if not players[name] then
		players[name] = {}
		players[name].longtime = initial_timeout
	end

	players[name].pos = pos
	players[name].interact = privs.interact
	players[name].time = players[name].longtime + timeout
	players[name].longtime = players[name].time
	
	if not players[name].properties then
		players[name].properties = player:get_properties()
	end

	player:set_properties({
        visual_size    = {x = 0, y = 0},
        ["selectionbox"] = {0, 0, 0, 0, 0, 0},
    })

	privs.interact = false

	minetest.set_player_privs(name, privs)

	storage:set_string("players", minetest.serialize(players))
end)

minetest.register_on_respawnplayer(function(player)
	local name = player:get_player_name()
	minetest.after(0, function(name)
		local player = minetest.get_player_by_name(name)
		if player and player_objs[name] then
			pos = player:get_pos()
			player:set_attach(player_objs[name], "", {x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
			player_objs[name]:set_pos(pos)
		elseif player and not player_objs[name] then
			pos = player:get_pos()
			player_objs[name] = minetest.add_entity(pos, "death_timer:death")
			player:set_attach(player_objs[name], "", {x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
			player_objs[name]:set_pos(pos)
		end
	end, name)

	local formspec
	if players[name] and players[name].time then
		formspec = "size[11,5.5]bgcolor[#320000b4;true]" ..
		"label[4.85,1.35;Wait" ..
		"]button[4,3;3,0.5;death_button;" .. players[name].time .."]"
	else
		formspec = "size[11,5.5]bgcolor[#320000b4;true]" ..
		"label[4.85,1.35;Wait" ..
		"]button_exit[4,3;3,0.5;death_button;Play" .."]"
	end
	minetest.after(1, minetest.show_formspec, name, "death_timer:death_screen", formspec)
	minetest.after(2, death_timer.loop, name)
end)

minetest.after(timeout_reduce_loop, death_timer.reduce_loop)