emeralde

trade = peripheral.wrap("right") -- The side of the trading post
pages = {}

function getId() -- Retuns the villager ids needed for trading
  return trade.getVillagerIds()
end

function getTradeInfo(id) -- Returns trading information needed
  local sold = trade.getItemSold(id,0)
  local bought = trade.getItemBought(id,0)
  return sold.name, sold.qty, sold.rawName, bought.name, bought.qty, id
end

loadPages()
while true do
    ids = getId() -- First get the ids of all close villagers
    term.clear()
    term.setCursorPos(1,1)
    for index, idnum in pairs(ids) do -- Loop through the ids
        sold,soldQty ,rawName,bought,boughtQty, id = getTradeInfo(idnum) -- Get information on what the villagers is trading
        if rawName == "item.emerald" then -- if it is a page and i dont already have it
            if trade.performTrade(id, 0) then -- Then buy it
                print("New page added!")
            else
                print("Failed to buy page!") -- Probably not enough emeralds
            end
        end
    end
    sleep(3)
end