Keycard

-- Keycard system with monitor display and specific passkeys for override and owner in ComputerCraft

-- Keycard IDs
local ownerKeycardPath = "/disk/ownerKeycard.txt"
local overrideKeycardPath = "/disk/overrideKeycard.txt"

-- Function to check if the keycard is valid
local function isValidKeycard(keycardID, passkey)
    local file = nil

    if keycardID == "owner" then
        file = fs.open(ownerKeycardPath, "r")
    elseif keycardID == "override" then
        file = fs.open(overrideKeycardPath, "r")
    end

    if file then
        local storedPasskey = file.readAll()
        file.close()
        return passkey == storedPasskey
    end

    return false
end

-- Function to grant access if the keycard is valid
local function grantAccess()
    print("Access granted!")
    -- Perform actions for granting access (e.g., opening a door, enabling a system)
    -- For monitor display
    term.redirect(peripheral.wrap("right")) -- Redirect output to the monitor on the right
    print("Access granted!") -- Display on the monitor
    term.restore() -- Restore output to the terminal
end

-- Function to deny access if the keycard is invalid
local function denyAccess()
    print("Access denied!")
    -- Perform actions for denying access (e.g., display a message, close a door)
    -- For monitor display
    term.redirect(peripheral.wrap("right")) -- Redirect output to the monitor on the right
    print("Access denied!") -- Display on the monitor
    term.restore() -- Restore output to the terminal
end

-- Main program
while true do
    -- Read input from the user
    print("Please swipe your keycard:")
    local keycardID = read()
    local passkey = ""

    if keycardID == "owner" or keycardID == "override" then
        print("Enter passkey:")
        passkey = read("*")
    end

    -- Check if the keycard is valid
    if isValidKeycard(keycardID, passkey) then
        grantAccess()
    else
        denyAccess()
    end
end