--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_ircd/mod_ircd.in.lua.old_annotate	Fri Dec 02 01:03:06 2011 +0000
@@ -0,0 +1,508 @@
+-- README
+-- Squish verse into this dir, then squish them into one, which you move
+-- and rename to mod_ircd.lua in your prosody modules/plugins dir.
+--
+-- IRC spec:
+-- http://tools.ietf.org/html/rfc2812
+local _module = module
+module = _G.module
+local module = _module
+--
+local component_jid, component_secret, muc_server, port_number =
+      module.host, nil, module:get_option_string("conference_server"), module:get_option_number("listener_port", 7000);
+
+if not muc_server then
+	module:log ("error", "You need to set the MUC server! halting.")
+	return false;
+end
+
+package.loaded["util.sha1"] = require "util.encodings";
+local verse = require "verse"
+require "verse.component"
+require "socket"
+c = verse.new();--verse.logger())
+c:add_plugin("groupchat");
+
+local function verse2prosody(e)
+	return c:event("stanza", e.stanza) or true;
+end
+module:hook("message/bare", verse2prosody);
+module:hook("message/full", verse2prosody);
+module:hook("presence/bare", verse2prosody);
+module:hook("presence/full", verse2prosody);
+c.type = "component";
+c.send = core_post_stanza;
+
+-- This plugin is actually a verse based component, but that mode is currently commented out
+
+-- Add some hooks for debugging
+--c:hook("opened", function () print("Stream opened!") end);
+--c:hook("closed", function () print("Stream closed!") end);
+--c:hook("stanza", function (stanza) print("Stanza:", stanza) end);
+
+-- This one prints all received data
+--c:hook("incoming-raw", print, 1000);
+--c:hook("stanza", print, 1000);
+--c:hook("outgoing-raw", print, 1000);
+
+-- Print a message after authentication
+--c:hook("authentication-success", function () print("Logged in!"); end);
+--c:hook("authentication-failure", function (err) print("Failed to log in! Error: "..tostring(err.condition)); end);
+
+-- Print a message and exit when disconnected
+--c:hook("disconnected", function () print("Disconnected!"); os.exit(); end);
+
+-- Now, actually start the connection:
+--c.connect_host = "127.0.0.1"
+--c:connect_component(component_jid, component_secret);
+
+local jid = require "util.jid";
+local nodeprep = require "util.encodings".stringprep.nodeprep;
+
+local function utf8_clean (s)
+	local push, join = table.insert, table.concat;
+	local r, i = {}, 1;
+	if not(s and #s > 0) then
+		return ""
+	end
+	while true do
+		local c = s:sub(i,i)
+		local b = c:byte();
+		local w = (
+			(b >= 9   and b <= 10  and 0) or
+			(b >= 32  and b <= 126 and 0) or
+			(b >= 192 and b <= 223 and 1) or
+			(b >= 224 and b <= 239 and 2) or
+			(b >= 240 and b <= 247 and 3) or
+			(b >= 248 and b <= 251 and 4) or
+			(b >= 251 and b <= 252 and 5) or nil
+		)
+		if not w then
+			push(r, "?")
+		else
+			local n = i + w;
+			if w == 0 then
+				push(r, c);
+			elseif n > #s then
+				push(r, ("?"):format(b));
+			else
+				local e = s:sub(i+1,n);
+				if e:match('^[\128-\191]*$') then
+					push(r, c);
+					push(r, e);
+					i = n;
+				else
+					push(r, ("?"):format(b));
+				end
+			end
+		end
+		i = i + 1;
+		if i > #s then
+			break
+		end
+	end
+	return join(r);
+end
+
+local function parse_line(line)
+	local ret = {};
+	if line:sub(1,1) == ":" then
+		ret.from, line = line:match("^:(%w+)%s+(.*)$");
+	end
+	for part in line:gmatch("%S+") do
+		if part:sub(1,1) == ":" then
+			ret[#ret+1] = line:match(":(.*)$");
+			break
+		end
+		ret[#ret+1]=part;
+	end
+	return ret;
+end
+
+local function build_line(parts)
+	if #parts > 1 then
+		parts[#parts] = ":" ..  parts[#parts];
+	end
+	return (parts.from and ":"..parts.from.." " or "")..table.concat(parts, " ");
+end
+
+local function irc2muc(channel, nick)
+	local room = channel and nodeprep(channel:match("^#(%w+)")) or nil;
+	return jid.join(room, muc_server, nick)
+end
+local function muc2irc(room)
+	local channel, _, nick = jid.split(room);
+	return "#"..channel, nick;
+end
+local role_map = {
+        moderator = "@",
+        participant = "",
+        visitor = "",
+        none = ""
+}
+local aff_map = {
+	owner = "~",
+	administrator = "&",
+	member = "+",
+	none = ""
+}
+local role_modemap = {
+        moderator = "o",
+        participant = "",
+        visitor = "",
+        none = ""
+}
+local aff_modemap = {
+	owner = "q",
+	administrator = "a",
+	member = "v",
+	none = ""
+}
+
+local irc_listener = { default_port = port_number, default_mode = "*l" };
+
+local sessions = {};
+local jids = {};
+local commands = {};
+
+local nicks = {};
+
+local st = require "util.stanza";
+
+local conference_server = muc_server;
+
+local function irc_close_session(session)
+	session.conn:close();
+end
+
+function irc_listener.onincoming(conn, data)
+	local session = sessions[conn];
+	if not session then
+		session = { conn = conn, host = component_jid, reset_stream = function () end,
+			close = irc_close_session, log = logger.init("irc"..(conn.id or "1")),
+			rooms = {},
+			roster = {} };
+		sessions[conn] = session;
+		function session.data(data)
+			local parts = parse_line(data);
+			module:log("debug", require"util.serialization".serialize(parts));
+			local command = table.remove(parts, 1);
+			if not command then
+				return;
+			end
+			command = command:upper();
+			if not session.nick then
+				if not (command == "USER" or command == "NICK") then
+					module:log("debug", "Client tried to send command %s before registering", command);
+					return session.send{from=muc_server, "451", command, "You have not registered"}
+				end
+			end
+			if commands[command] then
+				local ret = commands[command](session, parts);
+				if ret then
+					return session.send(ret);
+				end
+			else
+				session.send{from=muc_server, "421", session.nick, command, "Unknown command"};
+				return module:log("debug", "Unknown command: %s", command);
+			end
+		end
+		function session.send(data)
+			if type(data) == "string" then
+				return conn:write(data.."\r\n");
+			elseif type(data) == "table" then
+				local line = build_line(data);
+				module:log("debug", line);
+				conn:write(line.."\r\n");
+			end
+		end
+	end
+	if data then
+		session.data(data);
+	end
+end
+
+function irc_listener.ondisconnect(conn, error)
+	local session = sessions[conn];
+	if session then
+		for _, room in pairs(session.rooms) do
+			room:leave("Disconnected");
+		end
+		if session.nick then
+			nicks[session.nick] = nil;
+		end
+		if session.full_jid then
+			jids[session.full_jid] = nil;
+		end
+	end
+	sessions[conn] = nil;
+end
+
+function commands.NICK(session, args)
+	if session.nick then
+		session.send{from = muc_server, "484", "*", nick, "I'm afraid I can't let you do that"};
+		--TODO Loop throug all rooms and change nick, with help from Verse.
+		return;
+	end
+	local nick = args[1];
+	nick = nick:gsub("[^%w_]","");
+	if nicks[nick] then
+		session.send{from=muc_server, "433", nick, "The nickname "..nick.." is already in use"};
+		return;
+	end
+	local full_jid = jid.join(nick, component_jid, "ircd");
+	jids[full_jid] = session;
+	jids[full_jid]["ar_last"] = {};
+	nicks[nick] = session;
+	session.nick = nick;
+	session.full_jid = full_jid;
+	session.type = "c2s";
+	
+	session.send{from = muc_server, "001", nick, "Welcome in the IRC to MUC XMPP Gateway, "..nick};
+	session.send{from = muc_server, "002", nick, "Your host is "..muc_server.." running Prosody "..prosody.version};
+	session.send{from = muc_server, "003", nick, "This server was created the "..os.date(nil, prosody.start_time)}
+	session.send{from = muc_server, "004", nick, table.concat({muc_server, "mod_ircd(alpha-0.8)", "i", "aoqv"}, " ")};
+	session.send{from = muc_server, "375", nick, "- "..muc_server.." Message of the day -"};
+	session.send{from = muc_server, "372", nick, "-"};
+	session.send{from = muc_server, "372", nick, "- Please be warned that this is only a partial irc implementation,"};
+	session.send{from = muc_server, "372", nick, "- it's made to facilitate users transiting away from irc to XMPP."};
+	session.send{from = muc_server, "372", nick, "-"};
+	session.send{from = muc_server, "372", nick, "- Prosody is _NOT_ an IRC Server and it never will."};
+	session.send{from = muc_server, "372", nick, "- We also would like to remind you that this plugin is provided as is,"};
+	session.send{from = muc_server, "372", nick, "- it's still an Alpha and it's still a work in progress, use it at your sole"};
+	session.send{from = muc_server, "372", nick, "- risk as there's a not so little chance something will break."};
+	
+	session.send{from = nick, "MODE", nick, "+i"}; -- why -> Invisible mode setting, 
+						       --        enforce by default on most servers (since the source host doesn't show it's sensible to have it "set")
+end
+
+function commands.USER(session, params)
+	-- FIXME
+	-- Empty command for now
+end
+
+local function mode_map(am, rm, nicks)
+	local rnick;
+	local c_modes;
+	c_modes = aff_modemap[am]..role_modemap[rm]
+	rnick = string.rep(nicks.." ", c_modes:len())
+	if c_modes == "" then return nil, nil end
+	return c_modes, rnick
+end
+
+function commands.JOIN(session, args)
+	local channel = args[1];
+	if not channel then return end
+	local room_jid = irc2muc(channel);
+	print(session.full_jid);
+	if not jids[session.full_jid].ar_last[room_jid] then jids[session.full_jid].ar_last[room_jid] = {}; end
+	local room, err = c:join_room(room_jid, session.nick, { source = session.full_jid } );
+	if not room then
+		return ":"..muc_server.." ERR :Could not join room: "..err
+	end
+	session.rooms[channel] = room;
+	room.channel = channel;
+	room.session = session;
+	session.send{from=session.nick, "JOIN", channel};
+	if room.subject then
+	       	session.send{from=muc_server, 332, session.nick, channel ,room.subject};
+        end
+	commands.NAMES(session, channel);
+	
+	room:hook("subject-changed", function(changed) 
+	       	session.send((":%s TOPIC %s :%s"):format(changed.by.nick, channel, changed.to or ""));
+	end);
+	
+	room:hook("message", function(event)
+		if not event.body then return end
+		local nick, body = event.nick, event.body;
+		if nick ~= session.nick then
+			if body:sub(1,4) == "/me " then
+				body = "\1ACTION ".. body:sub(5) .. "\1"
+			end
+			local type = event.stanza.attr.type;
+			session.send{from=nick, "PRIVMSG", type == "groupchat" and channel or nick, body};
+			--FIXME PM's probably won't work
+		end
+	end);
+	
+	room:hook("presence", function(ar)
+		local c_modes;
+		local rnick;
+		if ar.nick and not jids[session.full_jid].ar_last[ar.room_jid][ar.nick] then jids[session.full_jid].ar_last[ar.room_jid][ar.nick] = {} end
+		local x_ar = ar.stanza:get_child("x", "http://jabber.org/protocol/muc#user")
+		if x_ar then
+		local xar_item = x_ar:get_child("item")
+			if xar_item and xar_item.attr and ar.stanza.attr.type ~= "unavailable" then
+		                if xar_item.attr.affiliation and xar_item.attr.role then
+					if not jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"] and
+					   not jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"] then
+						jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"] = xar_item.attr.affiliation
+						jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"] = xar_item.attr.role
+						c_modes, rnick = mode_map(xar_item.attr.affiliation, xar_item.attr.role, ar.nick);
+						if c_modes and rnick then session.send((":%s MODE %s +%s"):format(muc_server, channel, c_modes.." "..rnick)); end
+					else
+						c_modes, rnick = mode_map(jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"], jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"], ar.nick);
+						if c_modes and rnick then session.send((":%s MODE %s -%s"):format(muc_server, channel, c_modes.." "..rnick)); end
+						jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["affiliation"] = xar_item.attr.affiliation
+						jids[session.full_jid].ar_last[ar.room_jid][ar.nick]["role"] = xar_item.attr.role
+						c_modes, rnick = mode_map(xar_item.attr.affiliation, xar_item.attr.role, ar.nick);
+						if c_modes and rnick then session.send((":%s MODE %s +%s"):format(muc_server, channel, c_modes.." "..rnick)); end
+					end
+				end
+			end
+		 end
+	end, -1);
+end
+
+c:hook("groupchat/joined", function(room)
+	local session = room.session or jids[room.opts.source];
+        local channel = "#"..room.jid:match("^(.*)@");
+	session.send{from=session.nick.."!"..session.nick, "JOIN", channel};
+	if room.topic then
+		session.send{from=muc_server, 332, room.topic};
+	end
+	commands.NAMES(session, channel)
+	room:hook("occupant-joined", function(nick)
+		session.send{from=nick.nick.."!"..nick.nick, "JOIN", channel};
+	end);
+	room:hook("occupant-left", function(nick)
+		jids[session.full_jid].ar_last[nick.jid:match("^(.*)/")][nick.nick] = nil; -- ugly
+		session.send{from=nick.nick.."!"..nick.nick, "PART", channel};
+	end);
+end);
+
+function commands.NAMES(session, channel)
+	local nicks = { };
+	local room = session.rooms[channel];
+	local symbols_map = {
+		owner = "~",
+		administrator = "&",
+		moderator = "@",
+		member = "+"
+	}
+		
+	if not room then return end
+	-- TODO Break this out into commands.NAMES
+	for nick, n in pairs(room.occupants) do
+                if n.affiliation == "owner" and n.role == "moderator" then
+			nick = symbols_map[n.affiliation]..nick;
+                elseif n.affiliation == "administrator" and n.role == "moderator" then
+			nick = symbols_map[n.affiliation]..nick;
+		elseif n.affiliation == "member" and n.role == "moderator" then
+			nick = symbols_map[n.role]..nick;
+		elseif n.affiliation == "member" and n.role == "partecipant" then
+			nick = symbols_map[n.affiliation]..nick;
+		elseif n.affiliation == "none" and n.role == "moderator" then
+			nick = symbols_map[n.role]..nick;
+		end
+		table.insert(nicks, nick);
+	end
+	nicks = table.concat(nicks, " ");
+	session.send((":%s 353 %s = %s :%s"):format(muc_server, session.nick, channel, nicks));
+	session.send((":%s 366 %s %s :End of /NAMES list."):format(muc_server, session.nick, channel));
+	session.send(":"..muc_server.." 353 "..session.nick.." = "..channel.." :"..nicks);
+end
+
+function commands.PART(session, args)
+	local channel, part_message = unpack(args);
+	local room = channel and nodeprep(channel:match("^#(%w+)")) or nil;
+	if not room then return end
+	channel = channel:match("^([%S]*)");
+	session.rooms[channel]:leave(part_message);
+	jids[session.full_jid].ar_last[room.."@"..muc_server] = nil;
+	session.send(":"..session.nick.." PART :"..channel);
+end
+
+function commands.PRIVMSG(session, args)
+	local channel, message = unpack(args);
+	if message and #message > 0 then
+		if message:sub(1,8) == "\1ACTION " then
+			message = "/me ".. message:sub(9,-2)
+		end
+		message = utf8_clean(message);
+		if channel:sub(1,1) == "#" then
+			if session.rooms[channel] then
+				module:log("debug", "%s sending PRIVMSG \"%s\" to %s", session.nick, message, channel);
+				session.rooms[channel]:send_message(message);
+			end
+		else -- private message
+			local nick = channel;
+			module:log("debug", "PM to %s", nick);
+			for channel, room in pairs(session.rooms) do
+				module:log("debug", "looking for %s in %s", nick, channel);
+				if room.occupants[nick] then
+					module:log("debug", "found %s in %s", nick, channel);
+					local who = room.occupants[nick];
+					-- FIXME PMs in verse
+					--room:send_private_message(nick, message);
+					local pm = st.message({type="chat",to=who.jid}, message);
+					module:log("debug", "sending PM to %s: %s", nick, tostring(pm));
+					room:send(pm)
+					break
+				end
+			end
+		end
+	end
+end
+
+function commands.PING(session, args)
+	session.send{from=muc_server, "PONG", args[1]};
+end
+
+function commands.TOPIC(session, message)
+	if not message then return end
+	local channel, topic = message[1], message[2];
+	channel = utf8_clean(channel);
+	topic = utf8_clean(topic);
+	if not channel then return end
+	local room = session.rooms[channel];
+
+	if topic then room:set_subject(topic); end
+end
+
+function commands.WHO(session, args)
+	local channel = args[1];
+	if session.rooms[channel] then
+		local room = session.rooms[channel]
+		for nick in pairs(room.occupants) do
+			--n=MattJ 91.85.191.50 irc.freenode.net MattJ H :0 Matthew Wild
+			session.send{from=muc_server, 352, session.nick, channel, nick, nick, muc_server, nick, "H", "0 "..nick}
+		end
+		session.send{from=muc_server, 315, session.nick, channel, "End of /WHO list"};
+	end
+end
+
+function commands.MODE(session, args) -- FIXME
+	-- emptied for the time being, until something sane which works is available.
+end
+
+function commands.QUIT(session, args)
+	session.send{"ERROR", "Closing Link: "..session.nick};
+	for _, room in pairs(session.rooms) do
+		room:leave(args[1]);
+	end
+	jids[session.full_jid] = nil;
+	nicks[session.nick] = nil;
+	sessions[session.conn] = nil;
+	session:close();
+end
+
+function commands.RAW(session, data)
+	--c:send(data)
+end
+
+local function desetup()
+	require "net.connlisteners".deregister("irc");
+end
+
+--c:hook("ready", function ()
+	require "net.connlisteners".register("irc", irc_listener);
+	require "net.connlisteners".start("irc");
+--end);
+
+module:hook("module-unloaded", desetup)
+
+
+--print("Starting loop...")
+--verse.loop()