358 lines
7.3 KiB
Lua
358 lines
7.3 KiB
Lua
local socket = require "socket"
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local error = error
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local setmetatable = setmetatable
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local rawget = rawget
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local unpack = unpack
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local pairs = pairs
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local assert = assert
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local require = require
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local tonumber = tonumber
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local type = type
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local pcall = pcall
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module "irc"
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local meta = {}
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meta.__index = meta
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_META = meta
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require "irc.util"
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require "irc.asyncoperations"
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local meta_preconnect = {}
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function meta_preconnect.__index(o, k)
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local v = rawget(meta_preconnect, k)
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if not v and meta[k] then
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error("field '"..k.."' is not accessible before connecting", 2)
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end
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return v
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end
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function new(user)
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local o = {
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nick = assert(user.nick, "Field 'nick' is required");
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username = user.username or "lua";
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realname = user.realname or "Lua owns";
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hooks = {};
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track_users = true;
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}
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return setmetatable(o, meta_preconnect)
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end
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function meta:hook(name, id, f)
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f = f or id
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self.hooks[name] = self.hooks[name] or {}
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self.hooks[name][id] = f
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return id or f
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end
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meta_preconnect.hook = meta.hook
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function meta:unhook(name, id)
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local hooks = self.hooks[name]
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assert(hooks, "no hooks exist for this event")
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assert(hooks[id], "hook ID not found")
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hooks[id] = nil
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end
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meta_preconnect.unhook = meta.unhook
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function meta:invoke(name, ...)
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local hooks = self.hooks[name]
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if hooks then
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for id,f in pairs(hooks) do
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if f(...) then
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return true
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end
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end
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end
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end
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function meta_preconnect:connect(_host, _port)
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local host, port, password, secure, timeout
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if type(_host) == "table" then
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host = _host.host
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port = _host.port
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timeout = _host.timeout
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password = _host.password
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secure = _host.secure
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else
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host = _host
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port = _port
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end
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host = host or error("host name required to connect", 2)
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port = port or 6667
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local s = socket.tcp()
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s:settimeout(timeout or 30)
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assert(s:connect(host, port))
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if secure then
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local work, ssl = pcall(require, "ssl")
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if not work then
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error("LuaSec required for secure connections", 2)
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end
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local params
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if type(secure) == "table" then
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params = secure
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else
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params = {mode = "client", protocol = "tlsv1"}
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end
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s = ssl.wrap(s, params)
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success, errmsg = s:dohandshake()
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if not success then
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error(("could not make secure connection: %s"):format(errmsg), 2)
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end
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end
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self.socket = s
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setmetatable(self, meta)
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if password then
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self:send("PASS %s", password)
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end
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self:send("USER %s 0 * :%s", self.username, self.realname)
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self:send("NICK %s", self.nick)
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self.channels = {}
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s:settimeout(0)
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repeat
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self:think()
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until self.authed
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end
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function meta:disconnect(message)
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message = message or "Bye!"
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self:invoke("OnDisconnect", message, false)
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self:send("QUIT :%s", message)
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self:shutdown()
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end
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function meta:shutdown()
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self.socket:close()
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setmetatable(self, nil)
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end
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local function getline(self, errlevel)
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local line, err = self.socket:receive("*l")
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if not line and err ~= "timeout" and err ~= "wantread" then
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self:invoke("OnDisconnect", err, true)
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self:shutdown()
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error(err, errlevel)
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end
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return line
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end
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function meta:think()
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while true do
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local line = getline(self, 3)
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if line then
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if not self:invoke("OnRaw", line) then
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self:handle(parse(line))
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end
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else
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break
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end
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end
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end
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local handlers = {}
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handlers["PING"] = function(o, prefix, query)
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o:send("PONG :%s", query)
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end
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handlers["001"] = function(o)
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o.authed = true
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end
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handlers["PRIVMSG"] = function(o, prefix, channel, message)
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o:invoke("OnChat", parsePrefix(prefix), channel, message)
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end
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handlers["NOTICE"] = function(o, prefix, channel, message)
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o:invoke("OnNotice", parsePrefix(prefix), channel, message)
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end
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handlers["JOIN"] = function(o, prefix, channel)
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local user = parsePrefix(prefix)
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if o.track_users then
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if user.nick == o.nick then
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o.channels[channel] = {users = {}}
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else
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o.channels[channel].users[user.nick] = user
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end
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end
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o:invoke("OnJoin", user, channel)
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end
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handlers["PART"] = function(o, prefix, channel, reason)
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local user = parsePrefix(prefix)
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if o.track_users then
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if user.nick == o.nick then
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o.channels[channel] = nil
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else
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o.channels[channel].users[user.nick] = nil
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end
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end
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o:invoke("OnPart", user, channel, reason)
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end
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handlers["QUIT"] = function(o, prefix, msg)
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local user = parsePrefix(prefix)
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if o.track_users then
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for channel, v in pairs(o.channels) do
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v.users[user.nick] = nil
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end
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end
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o:invoke("OnQuit", user, msg)
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end
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handlers["NICK"] = function(o, prefix, newnick)
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local user = parsePrefix(prefix)
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if o.track_users then
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for channel, v in pairs(o.channels) do
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local users = v.users
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local oldinfo = users[user.nick]
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if oldinfo then
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users[newnick] = oldinfo
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users[user.nick] = nil
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o:invoke("NickChange", user, newnick, channel)
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end
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end
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else
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o:invoke("NickChange", user, newnick)
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end
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end
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--NAMES list
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handlers["353"] = function(o, prefix, me, chanType, channel, names)
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if o.track_users then
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o.channels[channel] = o.channels[channel] or {users = {}, type = chanType}
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local users = o.channels[channel].users
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for nick in names:gmatch("(%S+)") do
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local access, name = parseNick(nick)
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users[name] = {type = access}
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end
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end
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end
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--end of NAMES
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handlers["366"] = function(o, prefix, me, channel, msg)
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if o.track_users then
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o:invoke("NameList", channel, msg)
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end
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end
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--no topic
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handlers["331"] = function(o, prefix, me, channel)
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o:invoke("OnTopic", channel, nil)
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end
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--new topic
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handlers["TOPIC"] = function(o, prefix, channel, topic)
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o:invoke("OnTopic", channel, topic)
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end
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handlers["332"] = function(o, prefix, me, channel, topic)
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o:invoke("OnTopic", channel, topic)
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end
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--topic creation info
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handlers["333"] = function(o, prefix, me, channel, nick, time)
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o:invoke("OnTopicInfo", channel, nick, tonumber(time))
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end
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handlers["KICK"] = function(o, prefix, channel, kicked, reason)
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o:invoke("OnKick", channel, kicked, parsePrefix(prefix), reason)
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end
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--RPL_UMODEIS
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--To answer a query about a client's own mode, RPL_UMODEIS is sent back
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handlers["221"] = function(o, prefix, user, modes)
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o:invoke("OnUserModeIs", modes)
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end
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--RPL_CHANNELMODEIS
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--The result from common irc servers differs from that defined by the rfc
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handlers["324"] = function(o, prefix, user, channel, modes)
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o:invoke("OnChannelModeIs", channel, modes)
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end
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handlers["MODE"] = function(o, prefix, target, modes)
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o:invoke("OnModeChange", parsePrefix(prefix), target, modes)
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end
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handlers["ERROR"] = function(o, prefix, message)
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o:invoke("OnDisconnect", message, true)
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o:shutdown()
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error(message, 3)
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end
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function meta:handle(prefix, cmd, params)
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local handler = handlers[cmd]
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if handler then
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return handler(self, prefix, unpack(params))
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end
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end
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local whoisHandlers = {
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["311"] = "userinfo";
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["312"] = "node";
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["319"] = "channels";
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["330"] = "account"; -- Freenode
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["307"] = "registered"; -- Unreal
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}
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function meta:whois(nick)
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self:send("WHOIS %s", nick)
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local result = {}
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while true do
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local line = getline(self, 3)
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if line then
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local prefix, cmd, args = parse(line)
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local handler = whoisHandlers[cmd]
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if handler then
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result[handler] = args
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elseif cmd == "318" then
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break
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else
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self:handle(prefix, cmd, args)
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end
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end
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end
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if result.account then
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result.account = result.account[3]
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elseif result.registered then
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result.account = result.registered[2]
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end
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return result
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end
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function meta:topic(channel)
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self:send("TOPIC %s", channel)
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end
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