View difference between Paste ID: nJppZks6 and gaSL8HZC

---[[
+local baseUrl = "http://86.11.11.101:9090/"
-IRCCC v 0.9.2 ComputerCraft IRC Client
+
-Matti Vapa, 2014
+
-https://github.com/mattijv/IRCCC/
+
-http://pastebin.com/gaSL8HZC
+
 -- JSON4Lua: JSON encoding / decoding support for the Lua language.
-This is a ComputerCraft IRC client, or more specifically a client for the qwebirc backend server.
+
-Unfortunately the HTTP API in ComputerCraft doesn't allow for a true IRC client (even though the
+
-HTTP protocol can in theory be used to communicate with an IRC server[1]). This client provides
+
-a work-around by interfacing with the qwebirc backend. qwebirc is a popular webchat interface and
+
-is relatively straightforward to work with. In addition, several IRC servers already host a webchat
+
-server, so there's no need to set up your own, although that remains a possibility if you can't
+
-find a webchat for your favourite server to connect to.
+
 
-How to use:
+local errormsg = printError
 local base = _G
-	* Download with: pastebin get gaSL8HZC irc
+
-	* Check that the baseUrl and dynamicUrl parameters are correct. Examples are provided for espernet
+
-	  and quakenet. By default the client connects to espernet.
+
-	* Start the client with:
+
-		irc
+
 local decode_scanString
-You can also supply an optional nick argument to set your nickname, or you can change your nick within the client with the standard /nick command.
+
-Currently supported commands are:
+
 local isArray
-/window N			- switch to window N
+
-/join CHANNEL		- join CHANNEL
+
-/part				- part the current channel or private chat
+
-/quit 				- disconnect and quit
+
-/nick NICK			- change nickname to NICK
+
-/query USER 		- start a private chat with user USER
+
-/help 				- list available commands
+
 
   local vtype = base.type(v)
-1. https://www.youtube.com/watch?v=2ctRfWnisSk#t=343
+
   -- Handle strings
-TODO:
+
-		- color support
+
-		- better handling of the IRC protocol
+
-		- use window API where available
+
   -- Handle booleans
-This program is released under the MIT license.
+
     return base.tostring(v)
-]]--
+
 
   -- Handle tables
--- look at the source of the qwebirc webchat login page and take the values
+
--- for baseUrl and dynamicBaseUrl for use here
+
--- examples for espernet and quakenet
+
     local bArray, maxCount = isArray(v)
-local baseUrl = "http://webchat.esper.net/"
+
       for i = 1,maxCount do
---local baseUrl = "http://webchat.quakenet.org/"
+
---local dynamicUrl = "dynamic/leibniz/"
+
     else        -- An object, not an array
       for i,j in base.pairs(v) do
         if isEncodable(i) and isEncodable(j) then
           table.insert(rval, '"' .. encodeString(i) .. '":' .. encode(j))
         end
       end
     end
     if bArray then
       return '[' .. table.concat(rval,',') ..']'
     else
       return '{' .. table.concat(rval,',') .. '}'
     end
   end
 
   -- Handle null values
   if vtype=='function' and v==null then
     return 'null'
   end
 
   base.assert(false,'encode attempt to encode unsupported type ' .. vtype .. ':' .. base.tostring(v))
 end
 
 local function decode(s, startPos)
   startPos = startPos and startPos or 1
   startPos = decode_scanWhitespace(s,startPos)
   base.assert(startPos<=string.len(s), 'Unterminated JSON encoded object found at position in [' .. s .. ']')
   local curChar = string.sub(s,startPos,startPos)
   -- Object
   if curChar=='{' then
     return decode_scanObject(s,startPos)
   end
   -- Array
   if curChar=='[' then
     return decode_scanArray(s,startPos)
   end
   -- Number
   if string.find("+-0123456789.e", curChar, 1, true) then
     return decode_scanNumber(s,startPos)
   end
   -- String
   if curChar==[["]] or curChar==[[']] then
     return decode_scanString(s,startPos)
   end
   if string.sub(s,startPos,startPos+1)=='/*' then
     return decode(s, decode_scanComment(s,startPos))
   end
   -- Otherwise, it must be a constant
   return decode_scanConstant(s,startPos)
 end
 
 local function null()
   return null -- so json.null() will also return null ;-)
 end
 
 
 function decode_scanArray(s,startPos)
   local array = {}      -- The return value
   local stringLen = string.len(s)
   base.assert(string.sub(s,startPos,startPos)=='[','decode_scanArray called but array does not start at position ' .. startPos .. ' in string:\n'..s )
   startPos = startPos + 1
   -- Infinite loop for array elements
   repeat
     startPos = decode_scanWhitespace(s,startPos)
     base.assert(startPos<=stringLen,'JSON String ended unexpectedly scanning array.')
     local curChar = string.sub(s,startPos,startPos)
     if (curChar==']') then
       return array, startPos+1
     end
     if (curChar==',') then
       startPos = decode_scanWhitespace(s,startPos+1)
     end
     base.assert(startPos<=stringLen, 'JSON String ended unexpectedly scanning array.')
     object, startPos = decode(s,startPos)
     table.insert(array,object)
   until false
 end
 
 function decode_scanComment(s, startPos)
   base.assert( string.sub(s,startPos,startPos+1)=='/*', "decode_scanComment called but comment does not start at position " .. startPos)
   local endPos = string.find(s,'*/',startPos+2)
   base.assert(endPos~=nil, "Unterminated comment in string at " .. startPos)
   return endPos+2
 end
 
 function decode_scanConstant(s, startPos)
   local consts = { ["true"] = true, ["false"] = false, ["null"] = nil }
   local constNames = {"true","false","null"}
 
   for i,k in base.pairs(constNames) do
     --print ("[" .. string.sub(s,startPos, startPos + string.len(k) -1) .."]", k)
     if string.sub(s,startPos, startPos + string.len(k) -1 )==k then
       return consts[k], startPos + string.len(k)
     end
   end
   base.assert(nil, 'Failed to scan constant from string ' .. s .. ' at starting position ' .. startPos)
 end
 
 function decode_scanNumber(s,startPos)
   local endPos = startPos+1
   local stringLen = string.len(s)
   local acceptableChars = "+-0123456789.e"
   while (string.find(acceptableChars, string.sub(s,endPos,endPos), 1, true)
         and endPos<=stringLen
         ) do
     endPos = endPos + 1
   end
   local stringValue = 'return ' .. string.sub(s,startPos, endPos-1)
   local stringEval = base.loadstring(stringValue)
   base.assert(stringEval, 'Failed to scan number [ ' .. stringValue .. '] in JSON string at position ' .. startPos .. ' : ' .. endPos)
   return stringEval(), endPos
 end
 
 function decode_scanObject(s,startPos)
   local object = {}
   local stringLen = string.len(s)
   local key, value
   base.assert(string.sub(s,startPos,startPos)=='{','decode_scanObject called but object does not start at position ' .. startPos .. ' in string:\n' .. s)
   startPos = startPos + 1
   repeat
     startPos = decode_scanWhitespace(s,startPos)
     base.assert(startPos<=stringLen, 'JSON string ended unexpectedly while scanning object.')
     local curChar = string.sub(s,startPos,startPos)
     if (curChar=='}') then
       return object,startPos+1
     end
     if (curChar==',') then
       startPos = decode_scanWhitespace(s,startPos+1)
     end
     base.assert(startPos<=stringLen, 'JSON string ended unexpectedly scanning object.')
     -- Scan the key
     key, startPos = decode(s,startPos)
     base.assert(startPos<=stringLen, 'JSON string ended unexpectedly searching for value of key ' .. key)
     startPos = decode_scanWhitespace(s,startPos)
     base.assert(startPos<=stringLen, 'JSON string ended unexpectedly searching for value of key ' .. key)
     base.assert(string.sub(s,startPos,startPos)==':','JSON object key-value assignment mal-formed at ' .. startPos)
     startPos = decode_scanWhitespace(s,startPos+1)
     base.assert(startPos<=stringLen, 'JSON string ended unexpectedly searching for value of key ' .. key)
     value, startPos = decode(s,startPos)
     object[key]=value
   until false   -- infinite loop while key-value pairs are found
 end
 
 function decode_scanString(s,startPos)
   base.assert(startPos, 'decode_scanString(..) called without start position')
   local startChar = string.sub(s,startPos,startPos)
   base.assert(startChar==[[']] or startChar==[["]],'decode_scanString called for a non-string')
   local escaped = false
   local endPos = startPos + 1
   local bEnded = false
   local stringLen = string.len(s)
   repeat
     local curChar = string.sub(s,endPos,endPos)
     -- Character escaping is only used to escape the string delimiters
     if not escaped then
       if curChar==[[\]] then
         escaped = true
       else
         bEnded = curChar==startChar
       end
     else
       -- If we're escaped, we accept the current character come what may
       escaped = false
     end
     endPos = endPos + 1
     base.assert(endPos <= stringLen+1, "String decoding failed: unterminated string at position " .. endPos)
   until bEnded
   local stringValue = 'return ' .. string.sub(s, startPos, endPos-1)
   local stringEval = base.loadstring(stringValue)
   base.assert(stringEval, 'Failed to load string [ ' .. stringValue .. '] in JSON4Lua.decode_scanString at position ' .. startPos .. ' : ' .. endPos)
   return stringEval(), endPos
 end
 
 function decode_scanWhitespace(s,startPos)
   local whitespace=" \n\r\t"
   local stringLen = string.len(s)
   while ( string.find(whitespace, string.sub(s,startPos,startPos), 1, true)  and startPos <= stringLen) do
     startPos = startPos + 1
   end
   return startPos
 end
 
 function encodeString(s)
   s = string.gsub(s,'\\','\\\\')
   s = string.gsub(s,'"','\\"')
   s = string.gsub(s,'\n','\\n')
   s = string.gsub(s,'\t','\\t')
   return s
 end
 
 function isArray(t)
   -- Next we count all the elements, ensuring that any non-indexed elements are not-encodable
   -- (with the possible exception of 'n')
   local maxIndex = 0
   for k,v in base.pairs(t) do
     if (base.type(k)=='number' and math.floor(k)==k and 1<=k) then      -- k,v is an indexed pair
       if (not isEncodable(v)) then return false end     -- All array elements must be encodable
       maxIndex = math.max(maxIndex,k)
     else
       if (k=='n') then
         if v ~= table.getn(t) then return false end  -- False if n does not hold the number of elements
       else -- Else of (k=='n')
         if isEncodable(v) then return false end
       end  -- End of (k~='n')
     end -- End of k,v not an indexed pair
   end  -- End of loop across all pairs
   return true, maxIndex
 end
 
 function isEncodable(o)
   local t = base.type(o)
   return (t=='string' or t=='boolean' or t=='number' or t=='nil' or t=='table') or (t=='function' and o==null)
 end
 
 --------------------------------------------------------------------------------
 --------------------------------------------------------------------------------
 
 -- ComputerCraft IRC client code begins here
 
 --------------------------------------------------------------------------------
 --------------------------------------------------------------------------------
 
 local defaultNick = "cc-irc-client"..tostring(math.random(1,1000))
 local nick = defaultNick
 local password = nil
 local newNick = ""
 
 local counter = 0 -- used by the qwebirc protocol for something
 local sessionID = "" -- as is this, although a bit more self evident
 
 local currentChannel = "status"
 local quitReason = ""
 
 local BUFFERSIZE = 100 -- keep this many lines in each windows history
 local offset = 0 -- for scrolling, not implemented
 
 local w,h = term.getSize()
 local legacy = true --(window == nil) CC v < 1.6 doesn't have the window API which would be useful, but maybe later
 local windows = {}
 local winnumbers = {}
 local seen = {}
 if not legacy then
 	local origTerm = term.current()
 	windows["input"] = window.create(origTerm,1,h-1,w,2)
 	windows["status"] = window.create(origTerm,1,1,w,h-2)
 	windows["current"] = windows["status"]
 else
 	windows["status"] = {}
 	windows["current"] = windows["status"]
 end
 table.insert(winnumbers,"status")
 seen[windows["status"]] = true
 local lock = "off"
 
 local win2num = function(win)
 	for k,v in pairs(winnumbers) do
 		if v == win then return k end
 	end
 	return nil
 end
 
 --os.loadAPI("json")
 
 local post = function(url,data)
 	local cacheAvoidance = "abc"..tostring(math.random(0,10000)) -- not sure if this is needed...
 	local resp = http.post(baseUrl..dynamicUrl.."e/"..url,"r="..cacheAvoidance.."&t="..tostring(counter)..data)
 	counter = counter + 1
 	return resp
 end
 
 -- better responsiveness with asynchronous methods as we usually let the recv couroutine handle the responses
 local request = function(url,data)
 	local cacheAvoidance = "abc"..tostring(math.random(0,10000)) -- not sure if this is needed...
 	http.request(baseUrl..dynamicUrl.."e/"..url,"r="..cacheAvoidance.."&t="..tostring(counter)..data)
 	counter = counter + 1
 end
 
 -- these special URLs are used by the webchat server for different methods
 local send = function(data)
 	return request("p","&s="..sessionID.."&c="..textutils.urlEncode(data))
 end
 
 local recv = function()
 	return post("s","&s="..sessionID)
 end
 
 local connect = function(password)
   if password ~= nil then
   	return post("n","&nick="..nick.."&password="..password)
   else
     return post("n","&nick="..nick)
   end
 end
 
 -- some helper functions
 local pong = function(data)
 	return send("PONG :"..data)
 end
 
 local quit = function(_reason)
 	local reason = _reason or ""
 	return send("QUIT :"..reason)
 end
 
 -- lua default string methods suck :/
 local split = function(str,sep)
         local sep, fields = sep or ":", {}
         local pattern = string.format("([^%s]+)", sep)
         str:gsub(pattern, function(c) fields[#fields+1] = c end)
         return fields
 end
 
 local exit = function(reason)
 	local r = reason or ""
 	term.clear()
 	term.setCursorPos(1,1)
 	print(r)
 end
 
 -- for debug
 local writeLine
 writeLine = function(data,line)
 	if not (type(data) == "table") then
 		return tostring(data)
 	end
 	for i=1,#data do
 		if type(data[i]) == "table" then
 			line = writeLine(data[i],line)
 		elseif data[i] ~= nick then
 			line = line..data[i].." "
 		end
 	end
 	return line
 end
 
 -- some IRC protocol codes we handle "properly"
 local codes = {}
 codes["371"] = "RPL_INFO"
 codes["374"] = "RPL_ENDINFO"
 codes["375"] = "RPL_MOTDSTART"
 codes["372"] = "RPL_MOTD"
 codes["376"] = "RPL_ENDOFMOTD"
 codes["352"] = "RPL_WHOREPLY"
 
 commands = {}
 commands["join"] = function(input)
   if not input[2] then
     errormsg("No channel specified!")
     return true
   end
     local channel = input[2]:lower()
     if channel:sub(1,1) ~= "#" then
         errormsg("Invalid channel name!")
         return true
     end
     currentChannel = channel
     if legacy then
         windows[channel] = {}
     end
     windows["current"] = windows[currentChannel]
     table.insert(winnumbers,channel)
     seen[windows[channel]] = true
     send("JOIN "..channel)
     return true
 end
 
 commands["who"] = function(input)
     local channel = input[2]
     send("WHO "..channel)
     return true
 end
 
 commands["whois"] = function(input)
     local user = input[2]
     send("WHOIS "..user)
     return true
 end
 
 commands["part"] = function(input)
     local channel = currentChannel
     if channel == "status" then
         errormsg("Can't part status window!")
     else
         local nwin
         for i,v in pairs(winnumbers) do
             if v == channel then
                 nwin = i
                 break
             end
         end
         table.remove(winnumbers,nwin)
         seen[windows[channel]] = nil
         windows[channel] = nil
         currentChannel = winnumbers[#winnumbers]
         print(currentChannel)
         windows["current"] = windows[currentChannel]
--- add lines to window
+        seen[windows["current"]] = true
-local writeToWin = function(win, s)
+        if channel:sub(1,1) == "#" then
-	if win ~= windows["current"] then
+            send("PART "..channel)
-		seen[win] = false
+
     end
-	if legacy then
+
-		while #s > w do
+
-			table.insert(win,s:sub(1,w))
+
-			s = s:sub(w+1)
+
     quit(input[2])
-		table.insert(win,s)
+    return false
-		while #win > BUFFERSIZE do
+
-			table.remove(win,1)
+
 commands["window"] = function(input)
     local nwin = tonumber(input[2])
     if not nwin then
         errormsg("Invalid window number!")
     elseif nwin > #winnumbers or nwin < 1 then
         errormsg("Invalid window number!")
-	if legacy then
+
-		writeToWin(windows["status"],msg)
+        windows["current"] = windows[winnumbers[nwin]]
         seen[windows["current"]] = true
         currentChannel = winnumbers[nwin]
     end
--- draw the current window to the screen
+
-local drawWin = function(win)
+
-	if legacy then
+
-		local x,y = term.getCursorPos()
+
-		for i = 2,h-2 do
+    local nickname = input[2]
-			term.setCursorPos(1,i)
+    if nickname then
-			term.clearLine()
+        send("NICK "..nickname)
         newNick = nickname
-		if #win > 0 then
+        writeToWin(windows["status"],"Changed nick to: "..newNick)
-			local i = math.max(1,#win-h+4)
+
-			iend = #win
+        errormsg("No nickname given.")
-			local row = 2
+
-			while i <= iend do
+
-				term.setCursorPos(1,row)
+
-				local line = win[i]
+
-				--[[
+
-				local n = 0
+    local user = input[2]
-				while #line > w do
+    if user then
-					term.write(line:sub(1,w))
+        currentChannel = user
-					row = row + 1
+        if legacy then
-					n = n + 1
+            windows[user] = {}
-					term.setCursorPos(1,row)
+
-					line = line:sub(w+1)
+        windows["current"] = windows[currentChannel]
-				end
+        table.insert(winnumbers,user)
-				]]--
+        seen[windows[user]] = true
-				term.write(line)
+        --send("JOIN "..channel)
-				row = row + 1
+
-				i = i + 1
+        errormsg("No username given.")
     end
     return true
-		term.setCursorPos(x,y)
+
 
 commands["help"] = function(input)
     writeToWin(windows["status"],"Available commands:")
--- draw the separator with list of windows and indicators of activity
+    for k,v in pairs(commands) do
         writeToWin(windows["status"],"- "..k)
-local drawSeparator = function()
+
-	if legacy then
+
-		local x,y = term.getCursorPos()
+
-		local nwin = #winnumbers
+
-		--local left = math.floor(0.5*(w-2*nwin+1))
+
-		--local right = w-left-2*nwin-1
+
-		term.setCursorPos(1,h-1)
+
-		term.write(string.rep("-",w))
+
-		local newcount = 0
+
-		for i = 1,nwin do
+
-			if not seen[windows[winnumbers[i]]] then
+
-				newcount = newcount + 1
+
 alias["qr"] = "query"
 alias["h"] = "help"
-		local start = math.ceil(0.5*(w-(2*nwin+1+newcount)))
+
-		term.setCursorPos(start,h-1)
+
-		for i=1,nwin do
+
-			term.write(" ")
+	print(msg)
-			if winnumbers[i] == currentChannel then
+
-				term.setBackgroundColor(colors.white)
+
-				term.setTextColor(colors.black)
+
 	dat = data
-			term.write(string.format("%d",i))
+
-			if not seen[windows[winnumbers[i]]] then
+
-				term.write("+")
+
 			pong(data[i][4][1])
-			term.setBackgroundColor(colors.black)
+
-			term.setTextColor(colors.white)
+
 			local sender = senderDetails:sub(1,senderDetails:find("!")-1)
-		term.write(" ")
+
-		term.setCursorPos(x,y)
+
 				channel = sender
 			end
 			local msg = data[i][4][2]
--- top banner with channel name
+			print("<"..sender.."> "..msg)
-local drawBanner = function()
+		elseif id == "376" then
-	local x,y = term.getCursorPos()
+			print("Joining channel")
 			send("JOIN #" .. channel)
-	term.clearLine()
+
-	--local banner = "["..currentChannel.."]"
+            if newNick ~= "" then
-	local banner = currentChannel
+            	local name = data[i][3]:sub(1,data[i][3]:find("!")-1)
-	local start = math.ceil(0.5*(w-#banner))
+              	if name == nick then
-	term.setCursorPos(start,1)
+                   	nick = newNick
-	term.write(banner)
+                   	newNick = ""
-	term.setCursorPos(x,y)
+               	end
 			end
    		elseif id == "433" then
-local drawInput = function()
+           	print("Nickname already in use!")
-	if legacy then
+            newNick = ""
-		term.setCursorPos(1,h)
+        elseif codes[id] then
-		term.clearLine()
+          	print(data[i][4][2])
-		term.write("> ")
+
 	end
 end
 
 
 local receive = function()
 	resp = recv()
 	while resp do
 		_data = resp.readAll()
 		if #_data > 0 then
 			data = decode(_data)
 			handleResponse(data)
 		end
-      --print(textutils.serialize(data[i]))
+
-      --print(channel)
+
 	quitReason = "Disconnected!"
 end
-				if not windows[sender] then
+
-					if legacy then
+local nick = "twitchplayzcomputercraft"
-						windows[channel] = {}
+local password = "oauth:pq386z6ttls22h7bmsqbiuil1i2ns3"
-					end
+local channel = "rockettek"
-					table.insert(winnumbers,channel)
+
-					seen[windows[channel]] = false
+local resp = connect(password)
-				end
+if not resp then printError("Unable to connect!") return end
 local _data = resp.readAll()
 local data = decode(_data)
-			if legacy then
+local sessionID = data[2]
-				writeToWin(windows[channel],"<"..sender.."> "..msg)
+
 
-			--print("<"..sender.."> "..msg)
+receive()