function CTreasureManager:give_random()
    local rnd_tbl = {}
    for k,v in pairs(self.secrets) do
    if not(v.given) then
   table.insert(rnd_tbl, k)
    end
    end
    if(#rnd_tbl~=0) then
   self:give_treasure(rnd_tbl[math.random(1,#rnd_tbl)])
  return
    end
    printf("There are no treasures avaliable!")
end

treasure_manager.get_treasure_manager():give_random()

function CTreasureManager:give_random()
    local rnd_tbl = {
    "esc_hiding_place_1",
    "esc_hiding_place_2",
    "esc_hiding_place_3",
    "esc_hiding_place_4",
    "esc_hiding_place_5"
    }
  repeat
   local random_treasure = rnd_tbl[math.random(1,#rnd_tbl)]
  until not(self.secrets[random_treasure].given)
  if(#rnd_tbl~=0) then
   self:give_treasure(random_treasure)
   return
  end    
  printf("There are no treasures avaliable!")
end