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core.lua
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core.lua
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local b = {}
-- load external triggers
--triggers = {} -- { trigger_id = trigger_func(bot, chan, msg) }
--dofile("triggers.lua")
-- extra class vars
b.trusted_users = {"sweetfish"}
-- fancy print to console
function b:log(str)
print("[" .. os.date() .. "] " .. str)
end
-- send a raw message to the server
function b:send(str, prio)
--self.client:send(str .. "\n")
--self:log("[<-] " .. str)
if prio == nil then
prio = 1
end
table.insert(self.outputqueue, {msg = str, prio = prio})
end
-- called when we have a working connection
function b:on_connected()
-- join all channels we know
for k,v in pairs(self.config.channels) do
self:join_channel(v)
end
end
function b:is_trusted_user(nickname)
for k,v in pairs(self.trusted_users) do
if v == nickname then
return true
end
end
return false
end
-- parse incomming messages
function b:parse_message(line, err)
if not err then
self:log("[->] " .. tostring(line))
else
self:log("Recieved an error: " .. tostring(err) .. " (line '" .. tostring(line) .. "')")
end
-- first incomming message?
if not self.firstresponse then
-- make sure we have the latest config
self:load_config("settings")
self.firstresponse = true
-- send auth response
self:send("NICK " .. self.config.nickname)
self:send("USER " .. self.config.nickname .. " lua bot :mr lurch")
return
end
-- response id ?
local i,j,respid,respstr = string.find(line, ":.- (%d+) (.+)")
if not (i == nil) then
if respid == "433" then
-- nick allready in use, try to change to alternative
local new_nick = ""
self.altnickid = self.altnickid + 1
if self.altnickid >= #self.config.altnicks then
-- run out of alternative nicks, make up a new one!
new_nick = self.config.nickname .. tostring(math.random(1,9999))
else
new_nick = self.config.altnicks[self.altnickid]
end
self:change_nickname(new_nick)
return
end
end
-- we have a working connection!
if string.sub(line, 1, 1) == ":" then
if not self.connection_ok then
self.connection_ok = true
if not (self.on_connected == nil) then
self:on_connected()
end
end
end
-- ping message?
if string.sub(line, 1, 4) == "PING" then
self:send("PONG " .. string.sub(line, 6))
return
end
-- trigger ?
-- (triggers are in the form of ':<triggername>')
local i,j,s,c,k = string.find(line, ":(.-)!.- PRIVMSG (.-) :" .. self.config.triggerprefix .. "(.+)")
if not (i == nil) then
-- if 'sender' was not a channel, it must be the nickname
if not (string.sub(c, 1, 1) == "#") then
c = s
end
self:trigger(s, c, k)
end
-- forward to modules
for k,v in pairs(self.modules) do
if not (v.parse_message == nil) then
if type(v.parse_message) == "function" then
setfenv(v.parse_message, _G)(self, line)
end
end
end
end
-- send a message to a specific channel or nickname
function b:say(chan, msg)
if not (self.client) then
return
end
if not (msg == nil) then
-- broadcast?
if (chan == nil) then
chan = ""
local i = 1
for k,v in pairs(self.config.channels) do
if not (string.sub(v, 1, 1) == "#") then
v = "#" .. v
end
if #chan == 0 then
chan = v
else
chan = chan .. "," .. v
end
end
end
local pre = ""
local suf = msg
while (not (suf == "")) do
pre = string.sub(suf, 1, self.maxstringlength)
suf = string.sub(suf, self.maxstringlength)
--table.insert(self.outputqueue, {msg = pre, prio = prio})
self:send("PRIVMSG " .. chan .. " :" .. pre)
end
--self:send("PRIVMSG " .. chan .. " :" .. msg)
end
end
-- join a channel
function b:join_channel(chan)
if not (string.sub(chan, 1, 1) == "#") then
chan = "#" .. chan
end
self:send("JOIN " .. chan)
end
-- change nickname
function b:change_nickname(new_nick)
self.config.nickname = new_nick
self:send("NICK " .. new_nick)
end
-- quit the irc network and exit the script
function b:quit(msg)
self:say(nil, msg)
self:send("QUIT :" .. msg)
os.exit()
end
-- reload core.lua script and rebind methods
-- function also pulls the latest commit from the git repo
function b:reload(chan)
self:say(chan, "Pulling latest git...")
os.execute("git pull origin master")
self:say(chan, "Reloading core.lua...")
local succ, err = pcall(dofile, "core.lua")
if succ then
local succ, err = pcall(bind_functions, self)
if succ then
self:say(chan, "Done.")
else
self:say(chan, "Method binding failed:")
self:say(chan, tostring(err))
end
else
self:say(chan, "Failed, error:")
self:say(chan, tostring(err))
end
end
function b:unload_module(chan, modulename)
if self.config.modules[modulename] == nil then
self:say(chan, "No module with that name.")
else
package.loaded["modules/" .. modulename .. "/" .. modulename] = nil
self.config.modules[modulename] = nil
self.modules[modulename] = nil
end
end
function b:load_module(chan, modulename, moduleurl)
if not (moduleurl == nil) then
-- does module exist allready?
local tryopen, errmsg = io.open("modules/" .. tostring(modulename) .. "/tmpfile", "w")
if tryopen == nil then
-- create dir
os.execute("mkdir modules/" .. tostring(modulename))
end
self.config.modules[modulename] = moduleurl
self.modules[modulename] = {}
else
if (self.config.modules[modulename] == nil) then
--local tryopen, errmsg = io.open("modules/" .. tostring(modulename) .. "/tmpfile", "w")
--if tryopen == nil then
-- module does not exist
self.say(chan,"Module does not exist! Use " .. tostring(self.config.triggerprefix) .. "loadmodule <name> <giturl> instead.")
return
end
end
-- remove old
os.execute("rm -rf modules/" .. tostring(modulename))
-- pull code
print("tostring(self.config.modules[modulename]): " .. tostring(self.config.modules[modulename]))
os.execute("git clone " .. tostring(self.config.modules[modulename]) .. " modules/" .. tostring(modulename))
-- reload into modules
package.loaded["modules/" .. modulename .. "/" .. modulename] = nil
self.modules[modulename] = require("modules/" .. modulename .. "/" .. modulename)
self:say(chan, "Module loaded.")
end
-- parse triggers
function b:trigger(user, chan, msg)
-----------------------------
-- core triggers
if (self:is_trusted_user(user)) then
-- echo trigger?
if string.sub(msg, 1, 4) == "echo" then
self:say(chan, string.sub(msg, 6))
end
-- quit ?
if string.sub(msg, 1) == "quit" then
self:quit("good bye!")
end
-- reload ?
if string.sub(msg, 1) == "reload" then
self:save_config("settings")
self:reload(chan)
end
-- saveconf ?
if string.sub(msg, 1) == "saveconf" then
self:save_config("settings")
end
-- loadconf ?
if string.sub(msg, 1) == "loadconf" then
self:load_config("settings")
end
-- clearqueue ?
if string.sub(msg, 1) == "clearqueue" then
self.outputqueue = {}
end
-- loadmod ?
if string.sub(msg, 1, 7) == "loadmod" then
--self:save_config("settings")
local i,j,m,u = string.find(msg, "loadmod (.-) (.+)")
if not (i == nil) then
self:load_module(chan, m, u)
else
local i,j,m = string.find(msg, "loadmod (.+)")
if not (i == nil) then
self:load_module(chan, m, nil)
end
end
end
-- unloadmod ?
if string.sub(msg, 1, 9) == "unloadmod" then
--self:load_config("settings")
local i,j,m = string.find(msg, "unloadmod (.+)")
if not (i == nil) then
self:unload_module(chan, m)
end
end
--[[ rebase ?
--- Depricated!
if string.sub(msg, 1, 6) == "rebase" then
local i,j,gitid = string.find(msg, "rebase (%d+)")
if not (i == nil) then
self:save_config("settings")
self:rebase(chan, gitid)
end
end
]]
-- join ?
if string.sub(msg, 1, 4) == "join" then
local i,j,c = string.find(msg, "join (.+)")
if not (i == nil) then
if not (string.sub(c, 1, 1) == "#") then
c = "#" .. c
end
self:send("JOIN " .. c)
-- add channel to internal channel list
for k,v in pairs(self.config.channels) do
if v == c then
return
end
end
table.insert(self.config.channels, c)
end
end
-- nick ?
if string.sub(msg, 1, 4) == "nick" then
local i,j,n = string.find(msg, "nick (.+)")
if not (i == nil) then
self:change_nickname(n)
end
end
-- exec ?
if string.sub(msg, 1, 4) == "exec" then
local i,j,s = string.find(msg, "exec (.+)")
if not (i == nil) then
local res = assert(loadstring("return (" .. s .. ")"))()
self:say(chan, res)
--self:send(tostring(res))
end
end
end
--------------------------------
-- normal (public) triggers
for k,v in pairs(self.triggers) do
if string.sub(msg, 1, #tostring(k)) == tostring(k) then
setfenv(v, _G)(self, chan, msg)
break
end
end
end
-- save bot config to file
function b:load_config(file)
local filecheck, err = io.open(file .. ".lua")
if not (filecheck == nil) then
package.loaded[file] = nil
local config = require(file)
self.config = {}
for k,v in pairs(config) do
if not (string.sub(tostring(k), 1, 1) == "_") then
self.config[k] = v
end
end
end
end
-- load bot config from file
function b:save_config(file)
local new_data = 'module("' .. tostring(file) .. '")\n'
local function configval_to_string(k,v,indent)
local ret_str = ""
if not (type(k) == "number") then
ret_str = tostring(k) .. " = "
end
if type(v) == "number" then
ret_str = ret_str .. tostring(v)
elseif type(v) == "string" then
ret_str = ret_str .. '"' .. tostring(v) .. '"'
elseif type(v) == "table" then
ret_str = ret_str .. "{"
local ret_table = {}
for i,j in pairs(v) do
table.insert(ret_table, configval_to_string(i,j,indent + #tostring(k) + 3))
end
local sep = ""
for b=1,indent do
sep = sep .. " "
end
ret_str = ret_str .. table.concat(ret_table, ",\n" .. sep )
ret_str = ret_str .. "\n" .. sep .. "}"
else
return "ERROR"
end
return ret_str
end
local new_config_table = {}
if not (self.config == nil) then
for k,v in pairs(self.config) do
local new_value = ""
table.insert(new_config_table, configval_to_string(k,v, #tostring(k) + 3))
end
end
new_data = new_data .. table.concat(new_config_table, "\n")
local new_file = io.open(tostring(file) .. ".lua", "w+")
new_file:write(new_data .. "\n")
new_file:close()
end
-- main bot loop
-- pumps through all messages sent from the server
-- retruns false if an error occurs
function b:pump()
-- handle outgoing messages
local msgdelta = os.time() - self.lastsentstamp
if (#self.outputqueue > 0) and (msgdelta >= self.msgwait) then
if (#self.outputqueue > self.queuemax) then
-- make sure we wait extra long for messages outside the queue
if (msgdelta >= self.queuewait) then
-- send first one in queue
local elem = self.outputqueue[1]
self.client:send(elem.msg .. "\n")
self:log("[<-] " .. elem.msg)
table.remove(self.outputqueue, 1)
self.lastsentstamp = os.time()
end
else
-- send all remaining
local elem = self.outputqueue[1]
self.client:send(elem.msg .. "\n")
self:log("[<-] " .. elem.msg)
table.remove(self.outputqueue, 1)
self.lastsentstamp = os.time()
end
--[[if prio == nil then
prio = 1
end
table.insert(self.outputqueue, {msg = str, prio = prio})]]
end
-- handle incomming messages
local line, err = self.client:receive()
if not (err == nil) then
if not (err == "timeout") then
self:log("Error from client:recieve(): " .. tostring(err))
return false
end
end
if line then
-- got message
self.activitystamp = os.time()
local succ, err = pcall(self.parse_message, self, line, err)
if not succ then
self:log("Error when trying to parse message: " .. tostring(err))
end
return true
end
if (os.time() - self.activitystamp >= self.activitytimeout) then
self:log("Connection timeout!")
return false
end
return true
end
-- bind functions to specific bot instance
function bind_functions( bot )
for k,v in pairs(b) do
bot[tostring(k)] = v
end
-- load triggers
package.loaded["triggers"] = nil
bot.triggers = require("triggers")
end