ui.lua

unified_inventory.register_page("missions", {
	get_formspec = function(player)
		local mission = missions.get_current_mission(player)

		local formspec = "background[0,4.5;8,4;ui_main_inventory.png]" ..
			"label[1,0;Missions]";

		if mission then
			formspec = formspec .. 
				"label[1,1;" .. mission.name .. "]" ..
				"button[1,2;4,1;abort_mission;Abort mission]";
		else
			formspec = formspec .. "label[1,2;No running mission]";
		end

		return {formspec=formspec}
	end
})



unified_inventory.register_button("missions", {
        type = "image",
        image = "missions_block_preview.png",
        tooltip = "Missions"
})

minetest.register_on_player_receive_fields(function(player, formname, fields)
	if formname ~= "" then return end
	if not player then return end

	if fields.abort_mission then
		local player_name = player:get_player_name()
		missions.abort(player_name)
	end
end)