Dialing Computer

shell.run("pastebin", "get", "cXNuhwXh", "DexPI")
shell.run("DexPI")
clear(1,1)
stargates = listPer("stargate")
sg = peripheral.wrap(stargates[1])
sgd = "sgDatabase"

function dWrite()
  local dbs = textutils.serialize(db)
  local file = fs.open(sgd, "w")
  file.write(dbs)
  file.close()
end

function dRead()
  if fs.exists(sgd) then
    local file = fs.open(sgd, "r")
    db = textutils.unserialize(file.readAll())
    return db
  else
    return {}
  end
end
x, y = term.getSize()

paintutils.drawLine(1, 1, 51, 1, colors.gray)
term.setBackgroundColor(colors.gray)
function centered(text, l)
  term.setCursorPos((x/2) - (#text/2), l)
  write(text)
  local _,cy = term.getCursorPos()
  term.setCursorPos(1,cy + 1)
end
function header(text)
  term.setBackgroundColor(colors.gray)
  term.setTextColor(colors.blue)
  for i = 1, 2 do
    term.setCursorPos(1,i)
    write(string.rep(" ",x))
  end
  centered(text,1)
  term.setCursorPos(1,y)
  write(string.rep(" ",x))
  term.setBackgroundColor(colors.black)
  term.setTextColor(colors.white)
  term.setCursorPos(1,3)
end

function add()
  header("Addition to Database")
      repeat
        write("Gate Serial: ")
        gser = read()
      until sg.isValidAddress(gser) == true

      repeat
        print("\nDestination Name: ")
        gname = string.upper(read())
      until #gname > 2

      db[gser] = {
        ["name"] = gname,
      }
      dWrite()

end


header("Dialing Computer")
db = dRead()
add()