main_menu.lua

os.loadAPI("ATMApi.lua")

os.pullEvent = os.pullEventRaw
local w,h = term.getSize()

local title = "Choose option"
local ch_1 = "Card's info"
local ch_2 = "Deposite"
local ch_3 = "Withdraw"
local ch_4 = "Pay"
local ch_5 = "Log out"
local nOption = 1


function update()
    term.clear()
    local t1 = ch_1
    local t2 = ch_2
    local t3 = ch_3
    local t4 = ch_4
    local t5 = ch_5
    if nOption == 6 then nOption = 5 end
    if nOption == 0 then nOption = 1 end
    if nOption == 1 then t1 = "[ " .. t1 .. " ]"
    elseif nOption == 2 then t2 = "[ " .. t2 .. " ]"
    elseif nOption == 3 then t3 = "[ " .. t3 .. " ]"
    elseif nOption == 4 then t4 = "[ " .. t4 .. " ]"
    elseif nOption == 5 then t5 = "[ " .. t5 .. " ]"
    end
    ATMApi.printCent(math.floor(h/2) - 3, title)
    ATMApi.printCent(math.floor(h/2) - 1, t1)
    ATMApi.printCent(math.floor(h/2), t2)
    ATMApi.printCent(math.floor(h/2) + 1, t3)
    ATMApi.printCent(math.floor(h/2) + 2, t4)
    ATMApi.printCent(math.floor(h/2) + 3, t5)
end

update()

while true do
    local event, key = os.pullEvent("key")

    if key == keys.enter then
        if ATMApi.cardIn() == true then
            if nOption == 1 then shell.run("card_info") end
        else shell.run("main")
        end
        if nOption == 5 then shell.run("main") end
    elseif key == keys.down then
        nOption = nOption + 1
    elseif key == keys.up then
        nOption = nOption - 1
    end
    update()
end

--shell.run("main_menu")
--rednet.open("top")
--rednet.send(0, "client 948211")
--id, message = rednet.receive()
--print(message.pass)