musttest_game/mods/email/hud.lua

local hudkit = dofile(minetest.get_modpath("email") .. "/hudkit.lua")
email.hud = hudkit()



function email.update_hud(player)
	local name = player:get_player_name()

	-- ICON only shows for players that have a key of citizenship.
	if passport.player_has_key(name) then
		local inbox = email.get_inbox(name)

		if inbox and #inbox > 0 then
			if email.hud:exists(player, "email:text") then
				email.hud:change(player, "email:text", "text", "(" .. #inbox .. ")")
			else
				email.hud:add(player, "email:icon", {
					hud_elem_type = "image",
					name = "MailIcon",
					position = {x=0.52, y=0.52},
					text="email_mail.png",
					scale = {x=1,y=1},
					alignment = {x=0.5, y=0.5},
				})

				email.hud:add(player, "email:text", {
					hud_elem_type = "text",
					name = "MailText",
					position = {x=0.55, y=0.52},
					text= "(" .. #inbox .. ")",
					scale = {x=1,y=1},
					alignment = {x=0.5, y=0.5},
				})
			end
		else
			email.hud:remove(player, "email:icon")
			email.hud:remove(player, "email:text")
		end
	end
end



minetest.register_on_leaveplayer(function(player)
	local pname = player:get_player_name()
	email.hud.players[pname] = nil

	-- Email will be refetched from database when player next joins.
	-- In the meantime, free the inbox (in case it is very large).
	email.inboxes[pname] = nil
end)



function email.update_all_hud()
	local players = minetest.get_connected_players()
	for _, player in pairs(players) do
		email.update_hud(player)
	end
	minetest.after(11, email.update_all_hud)
end

minetest.after(11, email.update_all_hud)