Add respawn immunity

mods/respawn_immunity/init.lua

@@ -0,0 +1,47 @@
+respawn_immunity = {}
+
+local IMMUNE_TIME = 10
+local immune_serial = 0
+local immune_players = {}
+
+function respawn_immunity.is_immune(player)
+	return immune_players[player:get_player_name()]
+end
+
+function respawn_immunity.update_effects(player)
+	-- TODO: transparent player when immune
+	--
+	-- if immune_players[player:get_player_name()] then
+	-- 	player:set_texture_mod("[multiply:#1f1")
+	-- else
+	-- 	player:set_texture_mod(nil)
+	-- end
+end
+
+function respawn_immunity.set_immune(player)
+	immune_serial = immune_serial + 1
+	immune_players[player:get_player_name()] = immune_serial
+	minetest.after(1, function()
+		respawn_immunity.update_effects(player)
+	end)
+
+	-- Set time out
+	minetest.after(IMMUNE_TIME, function(id)
+		if immune_players[player:get_player_name()] == id then
+			immune_players[player:get_player_name()] = nil
+			respawn_immunity.update_effects(player)
+		end
+	end, immune_serial)
+end
+
+table.insert(minetest.registered_on_punchplayers, 1, function(player, hitter,
+		time_from_last_punch, tool_capabilities, dir, damage)
+	if player and respawn_immunity.is_immune(player) then
+		minetest.chat_send_player(hitter:get_player_name(),
+			player:get_player_name() .. " just respawned or joined, and is immune to attacks!")
+		return true
+	end
+end)
+
+minetest.register_on_joinplayer(respawn_immunity.set_immune)
+minetest.register_on_dieplayer(respawn_immunity.set_immune)