TestUmbra

tArgs = {...}
--Umbra - 1.5 Enabled IRC Chat
--Designed and coded by LDShadowLord, for use by the CCU server.

--Making it look purty
verrbar = "==VERR============================================="
umbrabar = "Umbra, the VERR default chat application!"
commands = "Use /<command> to use commands!"

--Defining some Variables
w,h = term.getSize()

--Wrapping to the modem, change the value if your modem is not located on the top.
modem = peripheral.wrap("top")

--Opening the two channels that we will be operating on.
local sendChannel = 016613
local replyChannel = 026613
modem.open(sendChannel) --Channel to send on
modem.open(replyChannel) --Channel to receive on

--Opening servers
--local CCUserver = 654321
--local VerrDef1 = 016613
--local VerrDef2 = 026613
--modem.open(CCUserver)
--modem.open(VerrDef1)
--modem.open(VerrDef2)

--Defining a 'Login' function.
local function login()
  local id = os.getComputerID()
  while true do
    term.clear()
    term.setCursorPos(1,1)
    print(verrbar)
    print(umbrabar)
    print("Hello! Please enter your name to use this program!")
    input = read()
    if input == "" then
      print("I am sorry, but that is not a valid username :( ")
      login()
    else
      print("Hello, "..input.."! We will now redirect you to the server screen!")
      modem.transmit(sendChannel, replyChannel, input.." has logged in from ID: "..id)
      sleep(2)
      term.clear()
      term.setCursorPos(1, h-2)
      term.write(string.rep("*", w))
      parallel.waitForAny(sendMessages, listenForMessages)
    end
  end
end

local function listenForMessages()
  while true do
     local id, msg = rednet.receive()
     if h == 16 then
       term.setCursorPos(1,1)
     end
     local oldx,oldy = term.getCursorPos()
     term.setCursorPos(1, w + 1)
     term.clearLine()
     if string.find(msg, "::") then
       term.write(string.gsub(msg, "::", ":"))
     else
       term.write(id..":"..msg)
    end
     term.setCursorPos(oldx, oldy)
  end
end

local function sendMessages()
  term.setCursorPos(1, h-1)
  while true do
    message = io.read()
    if message == "/exit" then
      break
    end
    modem.transmit(sendChannel, replyChannel, os.getComputerLabel().."::"..message)
    term.setCursorPos(1, h + 1)
    print(os.getComputerLabel()..":"..message)
    term.setCursorPos(1, h-1)
    term.clearLine()
  end
end

login()