PSChat - chatbox mod!

-- pastebin get cKmEV1HC pschat
chatbox = peripheral.find("chatbox_admin")
if not chatbox then
    chatbox = peripheral.find("chatbox")
    if not chatbox then
        chatbox = peripheral.find("chat_box")
        if not chatbox then
            chatbox = peripheral.find("chatBox")
            if not chatbox then
                error("Chatbox required, go get one.")
            end
        end
    end
end
name = "chatboxuser"
term.clear()
--[[Changelog: 1.4: Added Notification sound.
1.5: Added Join/Leave message.
3.0 now on App Engine!
]]--
--Credit Jesusthekiller for color formatting

local split = function(str, pat) local t = {} local fpat = "(.-)"..pat local last_end = 1 local s, e, cap = str:find(fpat, 1) if not s then return {str} end while s do if s ~= 1 or cap ~= "" then table.insert(t,cap) end last_end = e+1 s, e, cap = str:find(fpat, last_end) end if last_end <= #str then cap = str:sub(last_end) table.insert(t, cap) end return t end

if not inputMessage then
    inputMessage = "nil"
    inputName = "nil"
    inputSide = "nil"
end

justStarted = true
isRestart=false
local channel = "main_chatbox"

local trimColor=function(str)
  str=string.gsub(str,"%#.","")
  str=string.gsub(str,"%$.","")
  return str
end

local history={}

local update,colorRead,play,clear,receive,send,processCommand,post,updateDisplay
local cprint,cwrite,toCode,cCode,clear,sb,st,sc
function sc(x, y)
    term.setCursorPos(x, y)
end

function clear(move)
    sb(colors.black)
    term.clear()
    if move ~= false then sc(1,1) end
end

function sb(color)
    term.setBackgroundColor(color)
end

function st(color)
    term.setTextColor(color)
end

function cCode(h)
        if term.isColor() and term.isColor then
                return 2 ^ (tonumber(h, 16) or 0)
        else
                if h == "f" then
                        return colors.black
                else
                        return colors.white
                end
        end
end

function toCode(n)
        return string.format('%x', n)
end

function cwrite(text)
        text = tostring(text)

        local i = 0
    while true  do
                i = i + 1
                if i > #text then break end

        local c = text:sub(i, i)

                if c == "\\" then
            if text:sub(i+1, i+1) == "&" then
                write("&")
                i = i + 1
            elseif text:sub(i+1, i+1) == "$" then
                write("$")
                i = i + 1
                        else
                                write(c)
            end
        elseif c == "#" then
            st(cCode(text:sub(i+1, i+1)))
            i = i + 1
        elseif c == "$" then
            sb(cCode(text:sub(i+1, i+1)))
            i = i + 1
        else
            write(c)
        end
    end

        return
end

function cprint(text)
        return cwrite(tostring(text).."\n")
end

function colorRead( _sReplaceChar, _tHistory )
  term.setCursorBlink( true )

    local sLine = ""
  local nHistoryPos = nil
  local nPos = 0
    if _sReplaceChar then
    _sReplaceChar = string.sub( _sReplaceChar, 1, 1 )
  end

  local w, h = term.getSize()
  local sx, sy = term.getCursorPos()

  local function redraw( _sCustomReplaceChar )
    local nScroll = 0
    if sx + nPos >= w then
      nScroll = (sx + nPos) - w
    end

    term.setCursorPos( sx, sy )
    local sReplace = _sCustomReplaceChar or _sReplaceChar
    if sReplace then
      cwrite( string.rep(sReplace, string.len(sLine) - nScroll) )
    else
      cwrite( string.sub( sLine, nScroll + 1 ) )
    end
    term.setCursorPos( sx + nPos - (#sLine-#trimColor(sLine)) - nScroll, sy )
  end

  while true do
    local sEvent, param = os.pullEvent()
    if sEvent == "char" then
      sLine = string.sub( sLine, 1, nPos ) .. param .. string.sub( sLine, nPos + 1 )
      nPos = nPos + 1
      redraw()

    elseif sEvent == "key" then
        if param == keys.enter then
        -- Enter
        break

      elseif param == keys.left then
        -- Left
        if nPos > #sLine-#trimColor(sLine) then
          nPos = nPos - 1
          redraw()
        end

      elseif param == keys.right then
        -- Right
        if nPos < #sLine then
          nPos = nPos + 1
          redraw()
        end

      elseif param == keys.up or param == keys.down then
                -- Up or down
        if _tHistory then
          redraw(" ");
          if param == keys.up then
            -- Up
            if nHistoryPos == nil then
              if #_tHistory > 0 then
                nHistoryPos = #_tHistory
              end
            elseif nHistoryPos > 1 then
              nHistoryPos = nHistoryPos - 1
            end
          else
            -- Down
            if nHistoryPos == #_tHistory then
              nHistoryPos = nil
            elseif nHistoryPos ~= nil then
              nHistoryPos = nHistoryPos + 1
            end
          end

          if nHistoryPos then
                      sLine = _tHistory[nHistoryPos]
                      nPos = string.len( sLine )
                    else
            sLine = ""
            nPos = 0
          end
          redraw()
                end
      elseif param == keys.backspace then
        -- Backspace
        if nPos > 0 then
          redraw(" ");
          sLine = string.sub( sLine, 1, nPos - 1 ) .. string.sub( sLine, nPos + 1 )
          nPos = nPos - 1
          redraw()
        end
      elseif param == keys.home then
        -- Home
        nPos = 0
        redraw()
      elseif param == keys.delete then
        if nPos < string.len(sLine) then
          redraw(" ");
          sLine = string.sub( sLine, 1, nPos ) .. string.sub( sLine, nPos + 2 )
          redraw()
        end
      elseif param == keys["end"] then
        -- End
        nPos = string.len(sLine)
        redraw()
      end
    end
  end

  term.setCursorBlink( false )
  term.setCursorPos( w + 1, sy )
  print()

  return sLine
end

local postLink,getLink
postLink="http://http-chat-serv.appspot.com/post"
getLink="http://http-chat-serv.appspot.com/get"
updateLink = "https://raw.github.com/MudkipTheEpic/chatHTTP/master/Client"
currentProgram = shell.getRunningProgram()
--name = ...
screenX, screenY = term.getSize()
screenY = screenY-2
version = "3.0"
data = {}
if not fs.exists("/.chatData") then
    fs.makeDir("/.chatData")
end
if fs.exists("/.chatData/data") then
    file = fs.open("/.chatData/data", "r")
    data.file = file.readAll()
    password = data.file
    file.close()
else
    password = "guest"
end
local function centerWrite(text, ny)
    if type(text) == "table" then for _, v in pairs(text) do centerPrint(v) end
    else
        local x, y = term.getCursorPos()
        local w, h = term.getSize()
        term.setCursorPos(w/2 - text:len()/2 + (#text % 2 == 0 and 1 or 0), ny or y)
        cwrite(text)
    end
end

function updateDisplay(txt)
    term.setCursorPos(1, screenY)
    term.clearLine()
    centerWrite(txt)
end

local post=function(txt,txt2) txt=txt2 or txt return http.get(postLink,{usr = trimColor(name), data = txt, chan = channel}) end
local cmdpost=function(txt,txt2) txt=txt2 or txt return http.get(postLink,{usr = trimColor(name), cmd=txt, pass=password}) end

local commandTable={
    update=function() return update() end;
    version=function()
        return updateDisplay("Version: "..version)
    end;
    exit=function(...) local l if #{...}>0 then l=" ["..table.concat({...}," ").."]" else l="" end post(name.."#0$f left the room."..l) return error(nil,3) end;
    me=function(...)
        local str=table.concat({...}," ")
        return post("*"..name.."#0$f "..str)
    end;
    nick=function(newNick)
        if not newNick or newNick=="" then updateDisplay("Please supply a nickname.") return nil end
        post(name.."#0$f has changed nick to "..newNick)
        name=newNick
        return newNick
    end;
  ping=function()
    updateDisplay(split(cmdpost("ping").readAll(), "\n")[2])
  end;
    server=function(...)
        local args = {...}
        sendstr = table.concat(args, " ")
    return updateDisplay(split(cmdpost(sendstr).readAll(), "\n")[2])
    end;
  swapServ=function(...)
  local args = {...}
  local sendstr = "mvserv "..table.concat(args, " ")
  return updateDisplay(split(cmdpost(sendstr).readAll(), "\n")[2])
  end;
  swapChannel=function(channel)
  local sendstr = "chanc "..channel
  return updateDisplay(split(cmdpost(sendstr).readAll(), "\n")[2])
  end;
}

ServCmdTbl = {
    mvserv = function(NewServ)
  post(name.."#0$f has left this server")
    postLink="http://"..NewServ[3]
    getLink="http://"..NewServ[4]
    post(name.."#0$f has joined this server")
    end;
  cc = function(ChannelData)
  post(name.."#0$f has left this channel")
  channel = ChannelData[3]
  post(name.."#0$f has joined this channel")
  end;
}

function ProcServCmd(str)
    local data2 = split(str, "\n")
    str2 = data2[#data2]
    if str2:sub(1,10) == "servercmd;" then
        local strT = split(str2, ";")
        for k,v in pairs(ServCmdTbl) do
            if "servercmd;"..k == strT[1]..";"..strT[2] then
                cmd = strT[2]
                ServCmdTbl[cmd](strT)
                return false
            end
        end
        return true
    end
    return true
end

function processCommand(str)
    if str:sub(1,1)=="/" then
        local strT=split(str," ")
        for k,v in pairs(commandTable) do
            if "/"..k==strT[1] then
                return commandTable[strT[1]:sub(2)]
            end
        end
        return 4
    end
    return false
end
--cake
function update()
  updateContent = http.get(updateLink)
  updateContent = updateContent.readAll()
  file = fs.open(currentProgram, "r")
  fileContent = file.readAll()
  file.close()
  if fileContent == updateContent then
    term.setCursorPos(1, screenY)
    write(currentProgram.." is up to date!")
  else
    term.setCursorPos(1, screenY)
    write("New update available! Installing now...")
    sleep(1)
    file = fs.open(currentProgram, "w")
    file.write(updateContent)
    file.close()
    term.setCursorPos(1, screenY)
    term.clearLine()
    write("Done! Restarting "..currentProgram.." now!")
  isRestart=true
  commandTable["exit"]("Updating client...")
  end

end
--test
function play()
  redstone.setOutput("back", true)
  sleep(0.1)
  redstone.setOutput("back", false)
  sleep(0.3)
  redstone.setOutput("back", true)
  sleep(0.1)
  redstone.setOutput("back",false)
  sleep(0.05)
  redstone.setOutput("back",true)
  sleep(0.1)
  redstone.setOutput("back",false)
end

function clearY(fromY, toY)
  repeat
    term.setBackgroundColor(colors.black)
    term.setTextColor(colors.white)
    term.setCursorPos(1, fromY)
    term.clearLine()
    fromY = fromY+1
  until fromY >= toY
end

function receive()
 while true do
   get = http.get(getLink, {usr= name, slines=1, chan = channel})
   lastget = http.get(getLink, {usr= name, slines=1, chan = channel})
   if not get then error("Lost connection to server...") end
   get = get.readAll()
   lastget = lastget.readAll()
   tget = get
    get = string.gsub(get,"\\(.)","%1")
    if get ~= getOld then
        dop = ProcServCmd(get)
        if dop == true then
            xOld, yOld = term.getCursorPos()
            clearY(1, screenY)
            term.setCursorPos(1,1)
            cprint(get)
-- if string.find(get, "#4") then
--   lastmsg = string.gsub(string.sub(lastget, (#lastget-string.find(string.reverse(lastget), "4#")+2), #lastget), "#0$f", "", 1)
     lastmsg = string.gsub(lastget,"\\(.)","%1")
     if (lastmsg ~= "<"..inputName.."> "..inputMessage) and (justStarted == false) then
       chatbox.say(lastmsg)
     end
     justStarted = false
 --end
        end
        getOld = get
        term.setCursorPos(xOld, yOld)
    term.setBackgroundColor(colors.black)
    term.setTextColor(colors.white)
    end
    sleep(1)
  end
end

function send()
  while true do
    event, inputSide, inputName, inputMessage = os.pullEvent("chat_message")
    post("<"..inputName.."> "..inputMessage)
  end
end

clearY(screenY+1, screenY+3)

get = http.get(getLink, {usr = name, slines=1, chan = channel})
get = get.readAll()
get = getOld
local ok,err=pcall(parallel.waitForAny,send, receive)
print(err)
if isRestart then return shell.run(currentProgram,name)
end