bank_card_creator.lua

function main()
    while true do
        -- Check for inserted floppy.
        term.setCursorPos(1,1)
        term.clear()
        print("Bitte Bankkarte in Laufwerk stecken.")
        term.setCursorPos(1,3)
        print("Für eine neue karte:")
        term.setCursorPos(3,4)
        print("1. Karte aus box holen.")
        term.setCursorPos(3,5)
        print("2. Karte in Laufwerk schieben.")
        local event, side = os.pullEvent("disk")
        redstone.setAnalogOutput("front", 15)
        sleep(1)
        redstone.setAnalogOutput("front", 0)
        create_card()
        disk.eject(drive_card)
    end
end

function login()
    local username = ""
    local id = ""
    local password = ""
    local pin = ""

    -- Request username.
    term.setCursorPos(1,1)
    term.clear()
    print("Gebe deinen Namen ein: ")
    username = io.read()
    id = disk.getID(drive_card)

    -- Check if user exists in database.
    if not fs.exists(database_path .. username .. "/" .. username .. ".txt") then
        term.setCursorPos(1,1)
        term.clear()
        print("Gebe ein neues Passwort ein: ")
        password = io.read()
        term.setCursorPos(1,1)
        term.clear()
        print("Gebe ein neuen PIN ein: ")
        pin = io.read()

    else
        for i = 1, 3 do
            term.setCursorPos(1,1)
            term.clear()
            print("Benutzer existiert bereits! | versuche: " .. i .. "/3")
            term.setCursorPos(1,2)
            print("Gebe dein passwort ein: ")
            password = io.read()
            -- Get database account data and compare passwords.
            local file = fs.open(database_path .. username .. "/" .. username .. ".txt", "r")
            local client_name = file.readLine()
            local client_id = encryption.decrypt(file.readLine(), 4)
            local client_pin = encryption.decrypt(file.readLine(), 4)
            local client_password = encryption.decrypt(file.readLine(), 4)
            file.close()
            -- Später löschen!!!!
            print(client_name)
            print(client_id)
            print(client_pin)
            print(client_password)
            io.read()
            --________________________________________________
            if password == client_password then
                return { username, id, pin, password }
            end
        end
        return {nil, nil}
    end
    return { username, id, pin, password }
end

function create_card()
    local account = login()
    if account[1] == nil then
        return
    end
    -- Create new card.
    disk.setLabel(drive_card, account[1])
    local file = fs.open(card_name, "w")
    file.writeLine(encryption.encrypt(account[4], 5))
    file.close()
    -- Save new card to database.
    local file = fs.open(database_path .. account[1] .. "/" .. account[1] .. ".txt", "w")
    file.writeLine(account[1])
    file.writeLine(encryption.encrypt(account[2], 4))
    file.writeLine(encryption.encrypt(account[3], 4))
    file.writeLine(encryption.encrypt(account[4], 4))
    file.close()
end



os.loadAPI("encryption.lua")
drive_card = "bottom"
card_name = "disk2/bank.txt"
database_path = "disk/users/"
drive_database = "back"

main()