ae

function sortByAmount(x, y)
  return x.amount > y.amount
end

function generateList()
    print("import started")
    itemList={}
    n=1
    myList = lp.getAvailableItems()
    print(#myList)
    for key,value in pairs( myList ) do
        z = myList[key]
        id = z[1]
        itemList[n] = {}
        itemList[n].id = id
        itemList[n].name = string.sub(lp.getUnlocalizedName(itemList[key].id),1,20)
        itemList[n].amount = lp.getItemAmount(itemList[key].id)
        if (key%10 == 0) then
            sleep(0.00000000000000000000000000000001)
        end
        n= n+1
    end
    table.sort(itemList, sortByAmount)
    updateDisplay()
    return itemList
end

function checkAmount(itemList)
    for i = 1, totalItemsToDisplay ,1 do
        itemList[i].amount = lp.getItemAmount(itemList[i].id)
        if (i%10 == 0) then
            sleep(0.00000000000000000000000000000001)
        end
    end
    table.sort(itemList, sortByAmount)
    updateDisplay()
end

function updateDisplay()
    monX = 1
    monY = 2
    mon.clear()
    for i = 1, totalItemsToDisplay,1 do
        name = itemList[i].name
        amount = itemList[i].amount
        mon.setCursorPos(monY, monX)
        mon.write(name)
        mon.setCursorPos(monY+21,monX)
        mon.write(":        ")
        amountString = tostring(amount).." |"
        mon.setCursorPos(monY+30-string.len(amountString),monX)
        mon.write(amountString)
        if monX == itemsToDisplayPerRow then
            monX = 0
            monY = monY+30
        end
        monX = monX+1
    end
end

function boot()
    iteration = 1
    lp = peripheral.wrap(lpDirection)
    mon=peripheral.wrap(monitorDirection)
    mon.setTextScale(0.5)
    mon.clear()
    mon.setTextScale(0.5)
    mon.setCursorPos(34,26)
    mon.write("Platinawolf  display  system  booting  up,  stand by...")
    mon.setCursorPos(36,32)
    sleep(1)
    mon.write("Generating  list")
    itemList = generateList()

    sleep(10)
end

function mainLoop()
    while true do
        if (iteration % 30==0) then
            print("generating list")
            itemList = generateList()
            print("updateDisplay")
            iteration = 1
        else
            print("Updating list")
            checkAmount(itemList)
            print("updateDisplay")
            iteration = iteration +1
        end
        sleep(10)
    end
end


--variables
totalItemsToDisplay = 208
itemsToDisplayPerRow = 52
lpDirection = "bottom"
monitorDirection = "top"
-- end variables


boot()
mainLoop()