Skynet GUI

size = {term.getSize()}

users = {"fisher"}
passwords = {"fisher"}

function drawBoxPos(x,y,x1,y1)
  cy = y
  term.setCursorPos(x,y)
  for i = 1,(y1-y)+1 do
    for i = 1,(x1-x) do
      term.write(" ")
    end
    cy = cy+1
    term.setCursorPos(x,cy)
  end
end

function reset()
  term.setBackgroundColor(colors.lightGray)
  term.setCursorPos(2,12)
  for i = 1,size[1]-4 do
    term.write(" ")
  end
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.gray)
  drawBoxPos(9,8,size[1]-1,8)
  term.setBackgroundColor(colors.lightGray)
  term.setCursorPos(3,8)
  print("USER:")
  term.setBackgroundColor(colors.gray)
  drawBoxPos(9,10,size[1]-1,10)
  term.setBackgroundColor(colors.lightGray)
  term.setCursorPos(3,10)
  print("PASS:")
end

function loginScreen()
  term.setBackgroundColor(colors.white)
  term.clear()
  term.setBackgroundColor(colors.lightGray)
  drawBoxPos(2,2,size[1],size[2]-1)
  term.setCursorPos(1,size[2]-7)
  term.setBackgroundColor(colors.gray)
  drawBoxPos(((size[1]/2)-10)-1,2,((size[1]/2)+13)-1,4)
  term.setBackgroundColor(colors.red)
  drawBoxPos((size[1]/2)-10,1,(size[1]/2)+13,3)
  term.setTextColor(colors.gray)
  str = "Skynet Control Panel"
  term.setCursorPos((size[1]/2)-(#str/2) +1,2)
  term.write(str)
  term.setBackgroundColor(colors.lightGray)
  str = "User Account Information"
  term.setCursorPos((size[1]/2)-(#str/2) +1,6)
  term.write(str)
  term.setBackgroundColor(colors.gray)
  drawBoxPos(9,8,size[1]-1,8)
  term.setBackgroundColor(colors.lightGray)
  term.setCursorPos(3,8)
  print("USER:")
  term.setBackgroundColor(colors.gray)
  drawBoxPos(9,10,size[1]-1,10)
  term.setBackgroundColor(colors.lightGray)
  term.setCursorPos(3,10)
  print("PASS:")
  term.setBackgroundColor(colors.red)
  drawBoxPos(((size[1]/2)-9)-1,13,((size[1]/2)+13)-1,15)
  term.setTextColor(colors.gray)
  str = "Login to Skynet!"
  term.setCursorPos((size[1]/2)-(#str/2) +1,14)
  term.write(str)
  term.setBackgroundColor(colors.lightGray)
  str = "(c) 2016 Skynet - Innovate. Create. Defend."
  term.setCursorPos((size[1]/2)-(#str/2) +1,size[2]-2)
  term.write(str)
  while true do
    evnt = {os.pullEvent()}
    if evnt[1] == "mouse_click" then
      if evnt[3] > 8 and evnt[3] < size[1]-1 and evnt[4] == 8 then
        term.setBackgroundColor(colors.gray)
        term.setTextColor(colors.lightGray)
        term.setCursorPos(9,8)
        username = read()
      elseif evnt[3] > 8 and evnt[3] < size[1]-1 and evnt[4] == 10 then
        term.setBackgroundColor(colors.gray)
        term.setTextColor(colors.lightGray)
        term.setCursorPos(9,10)
        password = read("*")
      elseif evnt[3] > ((size[1]/2)-9)-2 and evnt[3] < ((size[1]/2)+13)-2 and evnt[4] > 12 and evnt[4] < 16 then
        if username ~= nil and password ~= nil then
          loggedin = false
          for i = 1,#users do
            if username == users[i] then
              if password == passwords[i] then
                term.setTextColor(colors.lime)
                term.setBackgroundColor(colors.lightGray)
                str = "Access Granted. Welcome back, "..username
                term.setCursorPos((size[1]/2)-(#str/2) +1,12)
                term.write(str)
                loggedin = true
                sleep(3)
              end
            end
          end
          if loggedin then
            break
          elseif loggedin == false then
            term.setTextColor(colors.red)
            term.setBackgroundColor(colors.lightGray)
            str = "Username or Password incorrect."
            term.setCursorPos((size[1]/2)-(#str/2) +1,12)
            term.write(str)
            sleep(2)
            reset()
          end
        elseif username == nil or password == nil then
          reset()
          term.setTextColor(colors.red)
          term.setBackgroundColor(colors.lightGray)
          str = "Username or Password not recognized."
          term.setCursorPos((size[1]/2)-(#str/2) +1,12)
          term.write(str)
          sleep(2)
          reset()
        end
      end
    end
  end
end

loginScreen()
term.setBackgroundColor(colors.black)
term.clear()
term.setCursorPos(1,1)