nodecore-cd2025/mods/nc_player_health/damage.lua

-- LUALOCALS < ---------------------------------------------------------
local minetest, nodecore, pairs
    = minetest, nodecore, pairs
-- LUALOCALS > ---------------------------------------------------------

local hurtcache = {}

minetest.register_on_player_hpchange(function(player, hp)
		local orig = player:get_hp()
		if not nodecore.player_can_take_damage(player) then
			return orig
		end
		local pname
		if hp < 0 then
			pname = player:get_player_name()
			hurtcache[pname] = nodecore.gametime
			player:get_meta():set_float("hurttime", nodecore.gametime)
			if nodecore.player_visible(player) then
				minetest.after(0, function()
						local now = player:get_hp()
						if now >= orig then return end
						nodecore.sound_play_except("player_damage", {
								pos = player:get_pos(),
								gain = 0.5
							}, player)
					end)
			end
		end
		if hp + orig <= 0 then
			hp = 1 - orig
			player:get_meta():set_float("dhp", -1)
		end
		return hp
	end,
	true
)

minetest.register_on_dieplayer(function(player)
		nodecore.setphealth(player, 0, "on_dieplayer")
	end)

local full = {}
local function heal(player, dtime)
	local hp = player:get_hp()
	if hp <= 0 then return end
	if hp == 1 then
		local meta = player:get_meta()
		if meta:get_float("dhp") == -1 then
			local hurt = hurtcache[player:get_player_name()] or meta:get_float("hurttime")
			if hurt + 0.5 < nodecore.gametime then
				nodecore.setphealth(player, 0, "heal_rehurtfx", 2)
			end
		end
	end
	local pname = player:get_player_name()
	local hpmax = player:get_properties().hp_max
	if full[pname] and player:get_hp() >= hpmax then return end
	full[pname] = nil
	local hurt = hurtcache[pname] or player:get_meta():get_float("hurttime")
	if hurt >= nodecore.gametime - 4 then return end
	nodecore.addphealth(player, dtime * 2, "heal")
	if nodecore.getphealth(player) >= hpmax then full[pname] = true end
end
minetest.register_globalstep(function(dtime)
		for _, player in pairs(minetest.get_connected_players()) do
			heal(player, dtime)
		end
	end)

local function setmax(player)
	player:set_properties({hp_max = 8})
end
minetest.register_on_joinplayer(setmax)
minetest.register_on_newplayer(setmax)