Login

os.pullEvent = os.pullEventRaw
state = 0
username = true
password = false


--Function
local readN = function(len, replaceChar)
      len = len or 12
      local input=""
      local key = 0
      term.setCursorBlink(true)
      repeat
        local e,p1= os.pullEvent()
        if e=="char" then
          if #input < len then
            input = input .. p1
            term.write(replaceChar or p1)
          end
        elseif e=="key" and p1==keys.backspace and #input > 0 then
          input = input:sub(1,#input-1)
          local x,y = term.getCursorPos()
          term.setCursorPos(x-1,y)
          term.write(" ")
          term.setCursorPos(x-1,y)
        end
      until p1==keys.enter
      term.setCursorBlink(false)
      return input
    end

drawLogin = function()
    term.setBackgroundColor(colors.cyan)
    clear()
    image = paintutils.loadImage("/system/res/dUser")
    paintutils.drawImage(image, 15,4)
    term.setCursorPos(25, 5)
    term.setBackgroundColor(colors.white)
    term.setTextColor(colors.lightGray)
    term.write("Username")
    term.setCursorPos(25, 7)
    term.setBackgroundColor(colors.lightGray)
    term.setTextColor(colors.gray)
    term.write("Password")
    term.setCursorPos(47,18)
    term.setTextColor(colors.white)
    term.setBackgroundColor(colors.red)
    print("O @")
    term.setCursorPos(48,18)
    term.setTextColor(colors.gray)
    print("|")
end

login = function()
    while username == true and state == 0 do
        e, button, x, y = os.pullEvent()
        if username == true and e == "mouse_up" and button == 1 and x >= 25 and x <= 36 and y == 5 then
            paintutils.drawLine(25,5, 36, 5, colors.white)
            term.setTextColor(colors.black)
            term.setCursorPos(25,5)
            name = readN()
            userN = name
            if userN == userN then
                file = fs.open("/system/users/user_profile", "r")
            if file.readLine() == userN then
                state = 1
                username = false
                password = true
            else
                file.close()
                term.setTextColor(colors.red)
                term.setBackgroundColor(colors.cyan)
                term.setCursorPos(25,8)
                print("Unknown Username:" .. userN)
                sleep(1)
                paintutils.drawLine(25,8, 51,8,colors.cyan)
            end
            end
        end
    end
    while password == true and state == 1 do
        e, button, x, y = os.pullEvent()
        if password == true and state == 1 then
            term.setCursorBlink(false)
            paintutils.drawLine(25,7, 36,7, colors.white)
            term.setTextColor(colors.black)
            term.setCursorPos(25,7)
            pass = readN(12, "#")
            userP = pass
            if userP == userP then
                file = fs.open("/system/users/user_profile", "r")
                file.readLine()
            if file.readLine() == userP then
                file.close()
                shell.run("/system/firmware")
            else
                file.close()
                term.setTextColor(colors.red)
                term.setBackgroundColor(colors.cyan)
                term.setCursorPos(25,8)
                print("Invalid Password!")
                sleep(1)
                paintutils.drawLine(25,8, 51,8,colors.cyan)
            end
            end
            end
            end
    end

clear = function()
    term.clear()
    term.setCursorPos(1,1)
end

start = function()
    state = 0
    clear()
    drawLogin()
    login()
end

start()