Secure NyatOS

local side = "back"
local opentime = 5
local userFile = "users.dat"
local maxAttempts = 3
local lockoutFile = "lockout.dat"
local lockoutDuration = 600

-- User data
local users = {
    {username = "Riku", password = "1111", admin = true},
    --Yo a little help here!?... Alright alright I got it, stand back son.. One, one, one, uhhmmmuhhhhh one!
    {username = "Guest", password = "$pass42", admin = false},
}

-- Function to read the lockout state from the file
local function readLockoutState()
  local file, err = fs.open(lockoutFile, "r")
  if file then
    local state = file.readAll()
    file.close()
    return tonumber(state) or 0
  else
    print("Error reading lockout file:", err)
    return 0
  end
end

-- Function to write the lockout state to the file
local function writeLockoutState(attempts)
  local file, err = fs.open(lockoutFile, "w")
  if file then
    file.write(tostring(attempts))
    file.close()
  else
    print("Error writing to lockout file:", err)
  end
end

-- Function to load user data from file
local function loadUserData()
  local file, err = fs.open(userFile, "r")
  if file then
    local data = file.readAll()
    file.close()
    return textutils.unserialize(data) or users
  else
    print("Error reading user file:", err)
    return users
  end
end

-- Function to save user data to file
local function saveUserData()
  local file, err = fs.open(userFile, "w")
  if file then
    file.write(textutils.serialize(users))
    file.close()
  else
    print("Error writing to user file:", err)
  end
end

-- Forest Quest Code
local function playForestQuest()
  term.clear()
  term.setCursorPos(1, 1)
  print("Welcome to Forest Quest!")
  print("You find yourself at the edge of an ancient forest.")
  print("What do you want to do?")
  print("[1.] Enter the forest")
  print("[2.] Walk along the edge")
  print("[3.] Check your inventory")
  print("[4.] Quit game")

  local choice = read()

  if choice == "1" then
    term.clear()
    term.setCursorPos(1, 1)
    print("You step into the forest and feel the temperature drop.")
    print("You see a path to the north leading deeper into the forest and a small hut to the east.")
    print("What do you want to do?")
    print("[1.] Follow the path north")
    print("[2.] Investigate the hut")
    print("[3.] Go back")
    local nextChoice = read()
    if nextChoice == "1" then
      term.clear()
      term.setCursorPos(1, 1)
      print("You follow the path north and find yourself at a large, ancient tree.")
      print("You can see a rope ladder hanging from the tree and a hidden entrance to a cave nearby.")
      print("What do you want to do?")
      print("[1.] Climb the rope ladder")
      print("[2.] Enter the cave")
      print("[3.] Return to the forest path")
      local treeChoice = read()
      if treeChoice == "1" then
        term.clear()
        term.setCursorPos(1, 1)
        print("You climb the rope ladder and find yourself in a treehouse with a great view.")
        print("There's a box here, but it seems to be locked.")
        print("What do you want to do?")
        print("[1.] Try to unlock the box")
        print("[2.] Climb down and go to the cave")
        print("[3.] Go back to the forest path")
        local boxChoice = read()
        if boxChoice == "1" then
          term.clear()
          term.setCursorPos(1, 1)
          print("You manage to unlock the box and find a key inside!")
          print("With this key, you can now open the hidden treasure chest in the clearing.")
          print("What do you want to do?")
          print("[1.] Return to the forest path")
          print("[2.] Quit game")
          local keyChoice = read()
          if keyChoice == "1" then
            term.clear()
            term.setCursorPos(1, 1)
            print("You return to the forest path with the key.")
            print("You find a hidden clearing with a treasure chest.")
            print("What do you want to do?")
            print("[1.] Open the treasure chest")
            print("[2.] Quit game")
            local chestChoice = read()
            if chestChoice == "1" then
              term.clear()
              term.setCursorPos(1, 1)
              print("You unlock the chest with the key and find a treasure!")
              print("Congratulations! You've won the game!")
            elseif chestChoice == "2" then
              term.clear()
              term.setCursorPos(1, 1)
              print("You quit the game. Goodbye!")
            else
              term.clear()
              term.setCursorPos(1, 1)
              print("Invalid choice. You remain at the clearing.")
            end
          elseif keyChoice == "2" then
            term.clear()
            term.setCursorPos(1, 1)
            print("You quit the game. Goodbye!")
          else
            term.clear()
            term.setCursorPos(1, 1)
            print("Invalid choice. You remain in the treehouse.")
          end
        elseif boxChoice == "2" then
          term.clear()
          term.setCursorPos(1, 1)
          print("You climb down the ladder and head towards the cave.")
          print("Inside the cave, you find some ancient ruins but no treasure.")
          print("You decide to leave and head back to the forest path.")
          playForestQuest()
        elseif boxChoice == "3" then
          playForestQuest()
        else
          term.clear()
          term.setCursorPos(1, 1)
          print("Invalid choice. You remain at the large tree.")
          playForestQuest()
        end
      elseif treeChoice == "2" then
        term.clear()
        term.setCursorPos(1, 1)
        print("You enter the cave and find some ancient ruins.")
        print("There's nothing of interest here. You decide to return to the forest path.")
        playForestQuest()
      elseif treeChoice == "3" then
        playForestQuest()
      else
        term.clear()
        term.setCursorPos(1, 1)
        print("Invalid choice. You remain at the large tree.")
        playForestQuest()
      end
    elseif nextChoice == "2" then
      term.clear()
      term.setCursorPos(1, 1)
      print("You walk along the forest edge but don't find anything interesting.")
      print("You can return to the forest entrance.")
      print("What do you want to do?")
      print("[1.] Enter the forest")
      print("[2.] Quit game")
      local edgeChoice = read()
      if edgeChoice == "1" then
        playForestQuest()
      elseif edgeChoice == "2" then
        term.clear()
        term.setCursorPos(1, 1)
        print("You quit the game. Goodbye!")
      else
        term.clear()
        term.setCursorPos(1, 1)
        print("Invalid choice. You remain walking along the forest edge.")
        playForestQuest()
      end
    elseif nextChoice == "3" then
      term.clear()
      term.setCursorPos(1, 1)
      print("You check your inventory but find it empty. There's nothing to see here.")
      print("What do you want to do?")
      print("[1.] Enter the forest")
      print("[2.] Walk along the edge")
      print("[3.] Quit game")
      local inventoryChoice = read()
      if inventoryChoice == "1" then
        playForestQuest()
      elseif inventoryChoice == "2" then
        playForestQuest()
      elseif inventoryChoice == "3" then
        term.clear()
        term.setCursorPos(1, 1)
        print("You quit the game. Goodbye!")
      else
        term.clear()
        term.setCursorPos(1, 1)
        print("Invalid choice. You remain at the forest edge.")
        playForestQuest()
      end
    elseif choice == "4" then
      term.clear()
      term.setCursorPos(1, 1)
      print("Thank you for playing. Goodbye!")
    else
      term.clear()
      term.setCursorPos(1, 1)
      print("Invalid choice. You are still at the edge of the forest.")
      playForestQuest()
    end
  end
end

-- Function to authenticate user credentials
local function authenticateUser(inputUser, inputPass)
  for _, user in ipairs(users) do
    if user.username == inputUser and user.password == inputPass then
      return true, nil, user
    end
  end
  return false, "Invalid credentials!"
end

-- Function to handle user login with input validation
local function handleLogin()
  term.clear()
  term.setCursorPos(1, 1)
  print("NyatOS Secure v2.4")
  print("")
  print("")
  print("")
  print("Please log in to continue.")
  print("")
  print("")
  print("[AUTHORIZED PERSONNEL ONLY!]")
  print("")

  local inputUser
  repeat
    write("Username: ")
    inputUser = read()
    if inputUser == "Guest" then
      print("Guest is not allowed to login to NyatOS Secure.")
      print("")
      print("Please use an authorized account...")
      sleep(3)
      return true
    elseif inputUser == "" then
      print("Username cannot be empty. Please try again.")
      sleep(2)
      return true
    end
  until inputUser ~= "" and inputUser ~= "Guest"

  local inputPass
  repeat
    write("Password: ")
    inputPass = read("*")
    if inputPass == "" then
      print("Password cannot be empty. Please try again.")
    end
  until inputPass ~= ""

  return authenticateUser(inputUser, inputPass)
end

-- Variables to manage menu pages
local currentPage = 1
local maxPages = 2

-- Function to display the menu and handle menu options
local function showMenu(user, currentPage)
    term.clear()
    term.setCursorPos(1, 1)
    print("Welcome, " .. user.username .. "!")
    print("")
    print("Main Menu:")

    if currentPage == 1 then
        print("[1.] Output RS Signal")
        print("[2.] Display System Info")
        print("[3.] List Files")
        print("[4.] Change Username")
        print("[5.] Change Password")
        print("[6.] Play Forest Quest")
        print("[7.] Dispense ULTRA BREW!")
        print("[8.] Music Player")
        print("[9.] Logout")
        if user.admin then
            print("")
            print("[N] Next Page")
        end
    elseif currentPage == 2 then
        print("[10.] Create New User")
        print("[11.] Change User Admin Status")
        print("[12.] View File Contents")
        print("[13.] Create File")
        print("[14.] Edit File")
        print("[15.] Delete File")
        print("[16.] Open Shell Prompt")
        print("[17.] Open Operator Prompt")
        print("[18.] Update NyatOS")
        print("")
        print("[P] Previous Page")
    end

    print("")
    print("")
    write("Choose an option (" .. (user.admin and (currentPage == 1 and "1-9" or "10-18") or "1-9") .. "): ")
    local choice = read()
    return choice, tonumber(choice)
end

-- Function to handle menu options based on user input
local function handleMenuOption(option, user)
    if user.username == "Guest" then
        if option == 3 then
            term.clear()
            term.setCursorPos(1, 1)
            print("Guest user is not allowed to change username.")
            print("")
            print("")
            print("Press Enter to return to the menu...")
            read()
            return true
        elseif option == 4 then
            term.clear()
            term.setCursorPos(1, 1)
            print("Guest user is not allowed to change password.")
            print("")
            print("")
            print("Press Enter to return to the menu...")
            read()
            return true
        end
    end
    if option == 1 then
        term.clear()
        term.setCursorPos(1, 1)
        print("Activating RS Signal...")

        if user.admin then
            rs.setOutput(side, true)
            sleep(opentime)
            rs.setOutput(side, false)
            print("RS Signal deactivated.")
            sleep(1)
        else
            sleep(2)
            print("[Access Denied: You do not have permission to activate this RS signal.]")
            print("[AUTHORIZED PERSONNEL ONLY]")
            sleep(3)
        end
        print("Logging out...")
        sleep(1)
        return false
    elseif option == 2 then
        term.clear()
        term.setCursorPos(1, 1)
        print("System Info:")
        print("CPU Usage: 5%")
        print("Memory Usage: 30MB")
        print("Disk Space: 100GB")
        print("")
        print("Press Enter to return to the menu...")
        read()
    elseif option == 3 then
        term.clear()
        term.setCursorPos(1, 1)
        print("Files in Current Directory:")
        local files = fs.list(".")
        for _, file in ipairs(files) do
            print(file)
        end
        print("")
        print("Press Enter to return to the menu...")
        read()
    elseif option == 4 then
        term.clear()
        term.setCursorPos(1, 1)
        write("Enter current username: ")
        local currentUsername = read()

        if currentUsername == user.username then
            write("Enter new username: ")
            local newUsername = read()

            if newUsername == "" then
                print("Username cannot be empty.")
            else
                for _, u in ipairs(users) do
                    if u.username == newUsername then
                        print("Username already exists.")
                        return true
                    end
                end
                user.username = newUsername
                saveUserData()
                print("Username changed successfully.")
            end
        else
            print("Current username is incorrect.")
        end

        print("")
        print("Press Enter to return to the menu...")
        read()
    elseif option == 5 then
        term.clear()
        term.setCursorPos(1, 1)
        write("Enter current password: ")
        local currentPassword = read("*")

        if currentPassword == user.password then
            write("Enter new password: ")
            local newPassword = read("*")

            if newPassword == "" then
                print("Password cannot be empty.")
            else
                user.password = newPassword
                saveUserData()
                print("Password changed successfully.")
            end
        else
            print("Current password is incorrect.")
        end

        print("")
        print("Press Enter to return to the menu...")
        read()
    elseif option == 6 then
        playForestQuest()
    elseif option == 7 then
        local function handlePresetCommands(presetOption)
            local success, err

            if presetOption == 1 then
                print("Dispensing Plutonium Punch...")
                sleep(1)
                success, err = pcall(function() commands.exec[=[give @p potion{CustomPotionColor:8991416,CustomPotionEffects:[{Id:1,Duration:12000,Amplifier:2},{Id:12,Duration:12000,Amplifier:9},{Id:5,Duration:12000,Amplifier:2},{Id:3,Duration:12000,Amplifier:4},{Id:24,Duration:12000},{Id:13,Duration:12000},{Id:16,Duration:12000},{Id:22,Duration:6000,Amplifier:4},{Id:10,Duration:12000,Amplifier:9},{Id:27,Duration:12000,Amplifier:69419},{Id:9,Duration:100},{Id:2,Duration:100,Amplifier:99},{Id:20,Duration:40},{Id:15,Duration:40}],HideFlags:32,display:{Name:'["",{"text":"        ","italic":false},{"text":"a","italic":false,"strikethrough":true,"bold":true,"obfuscated":true},{"italic":false,"text":" "},{"italic":false,"text":"Ultra Brew","bold":true,"underlined":true,"color":"dark_purple"},{"italic":false,"text":" "},{"italic":false,"text":"a","strikethrough":true,"bold":true,"obfuscated":true}]',Lore:['[""]','["",{"text":"    ","italic":false,"color":"light_purple"},{"text":"Plutonium Punch flavor!","italic":false,"color":"light_purple","underlined":true}]','[""]','["",{"text":"Each bottle of Ultra Brew has","color":"gray"}]','["",{"text":"40000% of the daily vitamins","color":"gray"}]','["",{"text":"a body needs, so you KNOW its","color":"gray"}]','["",{"text":"good for ya!","color":"gray"}]','[""]','["",{"text":" May have minor side effects","italic":false,"color":"dark_red"}]']},Enchantments:[{}]}]=] end)
            elseif presetOption == 2 then
                print("Dispensing Plutonium Punch (Share size)...")
                sleep(1)
                success, err = pcall(function() commands.exec[=[give @p splash_potion{CustomPotionColor:8991416,CustomPotionEffects:[{Id:1,Duration:12000,Amplifier:2},{Id:12,Duration:12000,Amplifier:9},{Id:5,Duration:12000,Amplifier:2},{Id:3,Duration:12000,Amplifier:4},{Id:24,Duration:12000},{Id:13,Duration:12000},{Id:16,Duration:12000},{Id:22,Duration:6000,Amplifier:4},{Id:10,Duration:12000,Amplifier:9},{Id:27,Duration:12000,Amplifier:69419},{Id:9,Duration:100},{Id:2,Duration:100,Amplifier:99},{Id:20,Duration:40},{Id:15,Duration:40}],HideFlags:32,display:{Name:'["",{"text":"        ","italic":false},{"text":"a","italic":false,"strikethrough":true,"bold":true,"obfuscated":true},{"italic":false,"text":" "},{"italic":false,"text":"Ultra Brew","bold":true,"underlined":true,"color":"dark_purple"},{"italic":false,"text":" "},{"italic":false,"text":"a","strikethrough":true,"bold":true,"obfuscated":true}]',Lore:['[""]','["",{"text":"    ","italic":false,"color":"light_purple"},{"text":"Plutonium Punch flavor!","italic":false,"color":"light_purple","underlined":true}]','[""]','["",{"text":"Each bottle of Ultra Brew has","color":"gray"}]','["",{"text":"40000% of the daily vitamins","color":"gray"}]','["",{"text":"a body needs, so you KNOW its","color":"gray"}]','["",{"text":"good for ya!","color":"gray"}]','[""]','["",{"text":" May have minor side effects","italic":false,"color":"dark_red"}]']},Enchantments:[{}]}]=] end)
            elseif presetOption == 3 then
                print("Dispensing Blunarium Berry...")
                sleep(1)
                success, err = pcall(function() commands.exec[=[give @p potion{CustomPotionColor:65535,CustomPotionEffects:[{Id:1,Duration:12000,Amplifier:49},{Id:12,Duration:12000,Amplifier:9},{Id:5,Duration:12000,Amplifier:2},{Id:3,Duration:12000,Amplifier:4},{Id:24,Duration:12000},{Id:13,Duration:12000},{Id:16,Duration:12000},{Id:22,Duration:6000,Amplifier:4},{Id:10,Duration:6000,Amplifier:1},{Id:27,Duration:12000,Amplifier:69419},{Id:9,Duration:100},{Id:2,Duration:20,Amplifier:99},{Id:20,Duration:40},{Id:15,Duration:40}],HideFlags:32,display:{Name:'["",{"text":"        ","italic":false},{"text":"a","italic":false,"strikethrough":true,"bold":true,"obfuscated":true},{"italic":false,"text":" "},{"italic":false,"text":"Ultra Brew","bold":true,"underlined":true,"color":"dark_purple"},{"italic":false,"text":" "},{"italic":false,"text":"a","strikethrough":true,"bold":true,"obfuscated":true}]',Lore:['[""]','["",{"text":"    ","italic":false,"color":"light_purple"},{"text":"Blunarium Berry flavor!","italic":false,"color":"aqua","underlined":true}]','[""]','["",{"text":"Each bottle of Ultra Brew has","color":"gray"}]','["",{"text":"40000% of the daily vitamins","color":"gray"}]','["",{"text":"a body needs, so you KNOW its","color":"gray"}]','["",{"text":"good for ya!","color":"gray"}]','[""]','["",{"text":" May have minor side effects","italic":false,"color":"dark_red"}]']},Enchantments:[{}]}]=] end)
            elseif presetOption == 4 then
                print("Dispensing Blunarium Berry (Share size)...")
                sleep(1)
                success, err = pcall(function() commands.exec[=[give @p splash_potion{CustomPotionColor:65535,CustomPotionEffects:[{Id:1,Duration:12000,Amplifier:49},{Id:12,Duration:12000,Amplifier:9},{Id:5,Duration:12000,Amplifier:2},{Id:3,Duration:12000,Amplifier:4},{Id:24,Duration:12000},{Id:13,Duration:12000},{Id:16,Duration:12000},{Id:22,Duration:6000,Amplifier:4},{Id:10,Duration:6000,Amplifier:1},{Id:27,Duration:12000,Amplifier:69419},{Id:9,Duration:100},{Id:2,Duration:20,Amplifier:99},{Id:20,Duration:40},{Id:15,Duration:40}],HideFlags:32,display:{Name:'["",{"text":"        ","italic":false},{"text":"a","italic":false,"strikethrough":true,"bold":true,"obfuscated":true},{"italic":false,"text":" "},{"italic":false,"text":"Ultra Brew","bold":true,"underlined":true,"color":"dark_purple"},{"italic":false,"text":" "},{"italic":false,"text":"a","strikethrough":true,"bold":true,"obfuscated":true}]',Lore:['[""]','["",{"text":"    ","italic":false,"color":"light_purple"},{"text":"Blunarium Berry flavor!","italic":false,"color":"aqua","underlined":true}]','[""]','["",{"text":"Each bottle of Ultra Brew has","color":"gray"}]','["",{"text":"40000% of the daily vitamins","color":"gray"}]','["",{"text":"a body needs, so you KNOW its","color":"gray"}]','["",{"text":"good for ya!","color":"gray"}]','[""]','["",{"text":" May have minor side effects","italic":false,"color":"dark_red"}]']},Enchantments:[{}]}]=] end)
            elseif presetOption == 5 then
                print("Dispensing Uranium Upsurge...")
                sleep(1)
                success, err = pcall(function() commands.exec[=[give @p potion{CustomPotionColor:5570393,CustomPotionEffects:[{Id:1,Duration:12000,Amplifier:2},{Id:12,Duration:12000,Amplifier:9},{Id:5,Duration:12000,Amplifier:9},{Id:3,Duration:12000,Amplifier:4},{Id:24,Duration:12000},{Id:13,Duration:12000},{Id:16,Duration:12000},{Id:22,Duration:6000,Amplifier:4},{Id:10,Duration:6000,Amplifier:1},{Id:27,Duration:12000,Amplifier:69419},{Id:9,Duration:100},{Id:2,Duration:100,Amplifier:99},{Id:20,Duration:40},{Id:15,Duration:40}],HideFlags:32,display:{Name:'["",{"text":"        ","italic":false},{"text":"a","italic":false,"strikethrough":true,"bold":true,"obfuscated":true},{"italic":false,"text":" "},{"italic":false,"text":"Ultra Brew","bold":true,"underlined":true,"color":"dark_purple"},{"italic":false,"text":" "},{"italic":false,"text":"a","strikethrough":true,"bold":true,"obfuscated":true}]',Lore:['[""]','["",{"text":"     ","italic":false,"color":"light_purple"},{"text":"Uranium Upsurge flavor!","italic":false,"color":"red","underlined":true}]','[""]','["",{"text":"Each bottle of Ultra Brew has","color":"gray"}]','["",{"text":"40000% of the daily vitamins","color":"gray"}]','["",{"text":"a body needs, so you KNOW its","color":"gray"}]','["",{"text":"good for ya!","color":"gray"}]','[""]','["",{"text":" May have minor side effects","italic":false,"color":"dark_red"}]']},Enchantments:[{}]}]=] end)
            elseif presetOption == 6 then
                print("Dispensing Uranium Upsurge (Share size)...")
                sleep(1)
                success, err = pcall(function() commands.exec[=[give @p splash_potion{CustomPotionColor:5570393,CustomPotionEffects:[{Id:1,Duration:12000,Amplifier:2},{Id:12,Duration:12000,Amplifier:9},{Id:5,Duration:12000,Amplifier:9},{Id:3,Duration:12000,Amplifier:4},{Id:24,Duration:12000},{Id:13,Duration:12000},{Id:16,Duration:12000},{Id:22,Duration:6000,Amplifier:4},{Id:10,Duration:6000,Amplifier:1},{Id:27,Duration:12000,Amplifier:69419},{Id:9,Duration:100},{Id:2,Duration:100,Amplifier:99},{Id:20,Duration:40},{Id:15,Duration:40}],HideFlags:32,display:{Name:'["",{"text":"        ","italic":false},{"text":"a","italic":false,"strikethrough":true,"bold":true,"obfuscated":true},{"italic":false,"text":" "},{"italic":false,"text":"Ultra Brew","bold":true,"underlined":true,"color":"dark_purple"},{"italic":false,"text":" "},{"italic":false,"text":"a","strikethrough":true,"bold":true,"obfuscated":true}]',Lore:['[""]','["",{"text":"     ","italic":false,"color":"light_purple"},{"text":"Uranium Upsurge flavor!","italic":false,"color":"red","underlined":true}]','[""]','["",{"text":"Each bottle of Ultra Brew has","color":"gray"}]','["",{"text":"40000% of the daily vitamins","color":"gray"}]','["",{"text":"a body needs, so you KNOW its","color":"gray"}]','["",{"text":"good for ya!","color":"gray"}]','[""]','["",{"text":" May have minor side effects","italic":false,"color":"dark_red"}]']},Enchantments:[{}]}]=] end)
            else
                print("Invalid option.")
                sleep(2)
                return true
            end

            if not success then
                term.clear()
                term.setCursorPos(1, 1)
                print("ULTRA BREW! only available from command PCs.")
                print("(The copper or purple ones)")
                print("")
                print("Sorry <3")
                sleep(4)
            end
        end

        local backToMainMenu = false

        repeat
            term.clear()
            term.setCursorPos(1, 1)
            print("Choose your ULTRA BREW flavor! :")
            print("")
            print("[1.] PLUTONIUM PUNCH!")
            print("[2.]   (Share size)")
            print("")
            print("[3.] BLUNARIUM BERRY!")
            print("[4.]   (Share size)")
            print("")
            print("[5.] URANIUM UPSURGE!")
            print("[6.]   (Share size)")
            print("")
            print("")
            print("")
            print("[7.] Return to Main Menu")
            print("")
            write("Choose an option: ")
            local presetOption = tonumber(read())

            if presetOption == 7 then
                backToMainMenu = true
            else
                if handlePresetCommands(presetOption) then
                    sleep(1)
                end
            end
        until backToMainMenu
    elseif option == 8 then
        local success, err
        term.clear()
        term.setCursorPos(1, 1)
        success, err = pcall(function() shell.run("musicify gui") end)
        if not success then
            term.clear()
            term.setCursorPos(1, 1)
            print("Music Player only available for Advanced PCs.")
            sleep(3)
        end
    elseif option == 9 then
        term.clear()
        term.setCursorPos(1, 1)
        print("Logging out...")
        sleep(2)
        return false
    elseif option == 69420 then
        term.clear()
        term.setCursorPos(1, 1)
        print("Enter username to backdoor admin status C:<")
        write(":")
        local targetUsername = read()

        local targetUser = nil
        for _, u in ipairs(users) do
            if u.username == targetUsername then
                targetUser = u
                break
            end
        end

        if targetUser then
            targetUser.admin = not targetUser.admin
            saveUserData()
            local status = targetUser.admin and "admin" or "non-admin"
            print("User " .. targetUsername .. " is now " .. status .. ".")
        else
            print("User not found.")
        end

        print("")
        print("Press Enter to return to the menu...")
        read()
    elseif user.admin then
        if option == 10 then
            term.clear()
            term.setCursorPos(1, 1)
            write("Enter new username: ")
            local newUsername = read()

            if newUsername == "" then
                print("Username cannot be empty.")
                return true
            end

            for _, u in ipairs(users) do
                if u.username == newUsername then
                    print("Username already exists.")
                    return true
                end
            end

            write("Enter password for new user: ")
            local newPassword = read("*")

            if newPassword == "" then
                print("Password cannot be empty.")
                return true
            end

            write("Is the new user an admin? (yes/no): ")
            local isAdmin = read()
            local isAdminFlag = isAdmin:lower() == "yes"

            table.insert(users, {username = newUsername, password = newPassword, admin = isAdminFlag})
            saveUserData()
            print("New user created successfully.")

            print("")
            print("Press Enter to return to the menu...")
            read()
        elseif option == 11 then
            term.clear()
            term.setCursorPos(1, 1)
            write("Enter username to change admin status: ")
            local targetUsername = read()

            local targetUser = nil
            for _, u in ipairs(users) do
                if u.username == targetUsername then
                    targetUser = u
                    break
                end
            end

            if targetUser then
                if targetUser.username == user.username then
                    print("You cannot change your own admin status.")
                else
                    targetUser.admin = not targetUser.admin
                    saveUserData()
                    local status = targetUser.admin and "admin" or "non-admin"
                    print("User " .. targetUsername .. " is now " .. status .. ".")
                end
            else
                print("User not found.")
            end

            print("")
            print("Press Enter to return to the menu...")
            read()
        elseif option == 12 then
            term.clear()
            term.setCursorPos(1, 1)
            write("Enter the filename to view: ")
            local filename = read()
            local file = fs.open(filename, "r")
            if file then
                term.clear()
                term.setCursorPos(1, 1)
                print("Contents of " .. filename .. ":")

                local delay = 0.3
                for line in file.readLine do
                    print(line)
                    sleep(delay)
                end
                file.close()
            else
                print("File not found.")
            end
            print("")
            print("Press Enter to return to the menu...")
            read()
        elseif option == 13 then
            term.clear()
            term.setCursorPos(1, 1)
            write("Enter the filename to create: ")
            local filename = read()
            write("Enter the content for the file: ")
            local content = read()
            local file = fs.open(filename, "w")
            if file then
                file.write(content)
                file.close()
                print("File created successfully.")
            else
                print("Failed to create file.")
            end
            print("")
            print("Press Enter to return to the menu...")
            read()
        elseif option == 14 then
            term.clear()
            term.setCursorPos(1, 1)
            write("Enter the filename to edit: ")
            local filename = read()
            local file = fs.open(filename, "r")
            if file then
                local oldContent = file.readAll()
                file.close()
                term.clear()
                term.setCursorPos(1, 1)
                print("Current contents of " .. filename .. ":")
                print(oldContent)
                print("")
                write("Enter new content for the file: ")
                local newContent = read()
                file = fs.open(filename, "w")
                if file then
                    file.write(newContent)
                    file.close()
                    print("File edited successfully.")
                else
                    print("Failed to edit file.")
                end
            else
                print("File not found.")
            end
            print("")
            print("Press Enter to return to the menu...")
            read()
        elseif option == 15 then
            local done = false

            repeat
                term.clear()
                term.setCursorPos(1, 1)
                write("Enter the filename to delete: ")
                local filename = read()

                if filename:match("^%s*$") then
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("Filename cannot be empty. Please try again.")
                elseif fs.exists(filename) then
                    term.clear()
                    term.setCursorPos(1, 1)
                    fs.delete(filename)
                    print("File deleted successfully.")
                    done = true
                else
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("File not found.")
                    done = true
                end

                print("")
                print("Press Enter to return to the menu...")
                read()
            until done
        elseif option == 16 then
            local backToMenu = false

            repeat
                term.clear()
                term.setCursorPos(1, 1)
                print("Enter the shell command to execute")
                print("(or 'R' to return to the menu):")
                write("")
                local command = read()

                if command:match("^%s*$") then
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("Error: You did not enter a command. Please try again.")
                    print("")
                    print("Press Enter to try again...")
                    read()
                elseif command:lower() == 'r' then
                    backToMenu = true
                    term.clear()
                    term.setCursorPos(1, 1)
                    return true
                else
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("Executing command: " .. command)
                    sleep(2)
                    shell.run(command)
                end
            until backToMenu

        elseif option == 17 then
            local backToMenu = false

            repeat
                term.clear()
                term.setCursorPos(1, 1)
                print("Enter the Minecraft command to execute")
                print("(or 'R' to return to the menu):")
                write("")
                local command = read()

                if command:match("^%s*$") then
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("Error: You did not enter a command. Please try again.")
                    print("")
                    print("Press Enter to try again...")
                    read()
                elseif command:lower() == 'r' then
                    backToMenu = true
                    term.clear()
                    term.setCursorPos(1, 1)
                    return true
                else
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("Executing command: " .. command)
                    sleep(2)
                    success, err = pcall(function() commands.exec(command) end)
                end

                if not success then
                    term.clear()
                    term.setCursorPos(1, 1)
                    print("MC commands only available for command PCs.")
                    print("(Duh)")
                    sleep(4)
                end
            until backToMenu

        elseif option == 18 then
            term.clear()
            term.setCursorPos(1, 1)
            print("Updating NyatOS Secure...")
            fs.delete("startup")
            sleep(2)
            shell.run("pastebin get XFgHwpHA startup")
            sleep(3)
            print("")
            print("NyatOS Secure update complete! Rebooting...")
            sleep(3)
            shell.run("reboot")
        elseif user.admin and option == "N" then
            return 2
        elseif user.admin and option == "P" then
            return 1
        else
            return true
        end
        return true
    end
	return true
end

-- Function to handle login attempts and manage lockout
local function handleLoginAttempts()
    local attempts = readLockoutState()
    if attempts >= maxAttempts then
        term.clear()
        term.setCursorPos(1, 1)
        print("System Locked Due to Too Many Failed Attempts! Try again in 10 minutes.")
        sleep(lockoutDuration)
        writeLockoutState(0)
    end

    local isAuthenticated, message, user = handleLogin()

    if isAuthenticated then
        local loggedIn = true
        local currentPage = 1
        while loggedIn do
            local option, choice = showMenu(user, currentPage)
            if option == "N" then
                if user.admin then
                    currentPage = 2
                end
            elseif option == "P" then
                if user.admin then
                    currentPage = 1
                end
            else
                loggedIn = handleMenuOption(choice, user)
            end
        end
        writeLockoutState(0)
    else
        term.clear()
        term.setCursorPos(1, 1)
        print(message)
        sleep(3)
        if message == "Invalid credentials!" then
            attempts = attempts + 1
            writeLockoutState(attempts)
        end
    end

    return attempts
end

-- Main function to run the application
local function main()

    users = loadUserData()
    while true do
        local attempts = handleLoginAttempts()
    end
end

-- Protected call to handle errors
while true do
  local ok, err = pcall(main)

  if not ok then
    if err == "Terminated" then
      print("Sorry, but we can't have you terminating this now can we?")
      pcall(sleep, 2)
    else
      printError("Unexpected error: " .. err)
    end
  end
end