[LUA] Tom.API

--Tom API V0.1.0--
function getVersion(s)
  v = "TomOS_0.1.0"
  return v
end

-- GUI Generating function --
tX, tY = term.getSize()

function gui()
  term.setTextColor(colors.green)
  term.setBackgroundColour(colours.black)
  term.clear()
  term.setCursorPos(1,1)
  v = tom.getVersion()
  write("+" .. string.rep("-", tX-2) .."+")
  for i = 2, tY -1 do
    term.setCursorPos(1,i)
    write("|")
    term.setCursorPos(tX,i)
    write("|")
  end
  term.setCursorPos(1,tY)
  write("+" .. string.rep("-", tX -2).. "+")
  term.setTextColor(colors.blue)
  term.setBackgroundColor(colors.lightBlue)
  term.setCursorPos(tX -( string.len(v)+1),1)
  term.write(v)
  term.setTextColor(colors.green)
  term.setBackgroundColor(colors.black)
  term.setCursorPos(2,2)
end

-- Print in centre of screen function --

function header(s)
  term.setCursorPos(math.ceil(((tX - string.len(s))/2)+1),2)
  term.write(s)
end

-- newline fits gui function --

function newl()
  tx, ty = term.getCursorPos()
  term.setCursorPos(2,ty+1)
end

-- Centre text after header --
function centre(s)
  tx, t = term.getSize()
  t, ty = term.getCursorPos()
  term.setCursorPos(math.ceil(((tx - string.len(s))/2)+1),ty +1)
  term.write(s)
end

-- Centre function for menu items --
function menuc(s)
  mx,my = term.getSize()
  t, my = term.getCursorPos()
  x = (mx/2) - 4
  term.setCursorPos(x,my+1)
  term.write(s)
end

-- Find active user name --
function user()
  file = io.open("/os/.logon","r")
  f = file:read()
  return f
end

-- Print a welcome for the user as header --
function welcome()
  user = tom.user()
  welc = ("Welcome ".. user)
  tom.header(welc)
end