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|
-- |
-- Module : Network.SimpleIRC.Core
-- Copyright : (c) Dominik Picheta 2010
-- License : BSD3
--
-- Maintainer : morfeusz8@gmail.com
-- Stability : provisional
-- Portability : portable
--
-- Messages (parsing) module
--
{-# LANGUAGE OverloadedStrings, DeriveDataTypeable #-}
module Network.SimpleIRC.Messages
( IrcMessage(..)
, Command(..)
, parse
, showCommand
)
where
import qualified Data.ByteString.Char8 as B
import Control.Arrow hiding (first)
import Data.Typeable
-- PING :asimov.freenode.net
-- :haskellTestBot!~test@host86-177-151-242.range86-177.btcentralplus.com JOIN :#()
-- :dom96!~dom96@unaffiliated/dom96 PRIVMSG #() :it lives!
-- :haskellTestBot MODE haskellTestBot :+i
-- :asimov.freenode.net 376 haskellTestBot :End of /MOTD command.
-- :asimov.freenode.net 332 haskellTestBot #() :Parenthesis
-- :asimov.freenode.net 333 haskellTestBot #() Raynes!~macr0@unaffiliated/raynes 1281221819
data Command =
MPrivmsg B.ByteString B.ByteString -- ^ PRIVMSG #chan :msg
| MJoin B.ByteString (Maybe B.ByteString) -- ^ JOIN #chan key
| MPart B.ByteString B.ByteString -- ^ PART #chan :msg
| MMode B.ByteString B.ByteString (Maybe B.ByteString) -- ^ MODE #chan +o user
| MTopic B.ByteString (Maybe B.ByteString) -- ^ TOPIC #chan :topic
| MInvite B.ByteString B.ByteString -- ^ INVITE user #chan
| MKick B.ByteString B.ByteString B.ByteString -- ^ KICK #chan user :msg
| MQuit B.ByteString -- ^ QUIT :msg
| MNick B.ByteString -- ^ NICK newnick
| MNotice B.ByteString B.ByteString -- ^ NOTICE usr/#chan :msg
| MAction B.ByteString B.ByteString -- ^ PRIVMSG usr/#chan :ACTION msg
deriving (Eq, Read, Show)
data IrcMessage = IrcMessage
{ mNick :: Maybe B.ByteString
, mUser :: Maybe B.ByteString
, mHost :: Maybe B.ByteString
, mServer :: Maybe B.ByteString
, mCode :: B.ByteString
, mMsg :: B.ByteString
, mChan :: Maybe B.ByteString
, mOrigin :: Maybe B.ByteString -- ^ Origin of the message, this is mNick if a message was sent directly to the bot, otherwise if it got sent to the channel it's mChan.
, mOther :: Maybe [B.ByteString]
, mRaw :: B.ByteString
} deriving (Show, Typeable)
-- |Parse a raw IRC message
parse :: B.ByteString -> IrcMessage
parse txt =
case split of
[code, msg] -> parse2 code msg noCarriage
[first, code, msg] -> parse3 first code msg noCarriage
[first, code, chan, msg] -> parse4 first code chan msg noCarriage
[first, code, chan, other, msg] -> parse5 first code chan other msg noCarriage
server:code:nick:chan:other -> parseOther server code nick chan other noCarriage
_ -> error "SimpleIRC: unexpected message format"
where noCarriage = takeCarriageRet txt
split = smartSplit noCarriage
-- Nick, Host, Server
parseFirst :: B.ByteString -> (Maybe B.ByteString, Maybe B.ByteString, Maybe B.ByteString, Maybe B.ByteString)
parseFirst first =
if '!' `B.elem` first
then let (nick, user_host) = B.break (== '!') (dropColon first)
in if '@' `B.elem` user_host
then let (user, host) = second B.tail $ B.break (== '@') $ B.tail user_host
in (Just nick, Just user, Just host, Nothing)
else (Just nick, Nothing, Just user_host, Nothing)
else (Nothing, Nothing, Nothing, Just $ dropColon first)
getOrigin :: Maybe B.ByteString -> B.ByteString -> B.ByteString
getOrigin (Just nick) chan =
if "#" `B.isPrefixOf` chan || "&" `B.isPrefixOf` chan || "+" `B.isPrefixOf` chan
|| "!" `B.isPrefixOf` chan
then chan
else nick
getOrigin Nothing chan = chan
parse2 :: B.ByteString -> B.ByteString -> B.ByteString -> IrcMessage
parse2 code msg =
IrcMessage Nothing Nothing Nothing Nothing code
(dropColon msg) Nothing Nothing Nothing
parse3 :: B.ByteString -> B.ByteString -> B.ByteString -> B.ByteString -> IrcMessage
parse3 first code msg =
let (nick, user, host, server) = parseFirst first
in IrcMessage nick user host server code (dropColon msg) Nothing Nothing Nothing
parse4 :: B.ByteString
-> B.ByteString
-> B.ByteString
-> B.ByteString
-> B.ByteString
-> IrcMessage
parse4 first code chan msg =
let (nick, user, host, server) = parseFirst first
in IrcMessage nick user host server code
(dropColon msg) (Just chan) (Just $ getOrigin nick chan) Nothing
parse5 :: B.ByteString
-> B.ByteString
-> B.ByteString
-> B.ByteString
-> B.ByteString
-> B.ByteString
-> IrcMessage
parse5 first code chan other msg =
let (nick, user, host, server) = parseFirst first
in IrcMessage nick user host server code
(dropColon msg) (Just chan) (Just $ getOrigin nick chan) (Just [other])
parseOther :: B.ByteString
-> B.ByteString
-> B.ByteString
-> B.ByteString
-> [B.ByteString]
-> B.ByteString
-> IrcMessage
parseOther server code nick chan other =
IrcMessage (Just nick) Nothing Nothing (Just server) code
(B.unwords other) (Just chan) (Just $ getOrigin (Just nick) chan) (Just other)
smartSplit :: B.ByteString -> [B.ByteString]
smartSplit txt =
case B.breakSubstring (B.pack " :") (dropColon txt) of
(x,y) | B.null y ->
B.words txt
| otherwise ->
let (_, msg) = B.break (== ':') y
in B.words x ++ [msg]
takeLast :: B.ByteString -> B.ByteString
takeLast xs = B.take (B.length xs - 1) xs
takeCarriageRet :: B.ByteString -> B.ByteString
takeCarriageRet xs =
if B.drop (B.length xs - 1) xs == B.pack "\r"
then takeLast xs
else xs
dropColon :: B.ByteString -> B.ByteString
dropColon xs =
if B.take 1 xs == B.pack ":"
then B.drop 1 xs
else xs
showCommand :: Command -> B.ByteString
showCommand (MPrivmsg chan msg) = "PRIVMSG " `B.append` chan `B.append`
" :" `B.append` msg
showCommand (MJoin chan (Just key)) = "JOIN " `B.append` chan `B.append`
" " `B.append` key
showCommand (MJoin chan Nothing) = "JOIN " `B.append` chan
showCommand (MPart chan msg) = "PART " `B.append` chan `B.append`
" :" `B.append` msg
showCommand (MMode chan mode (Just usr)) = "MODE " `B.append` chan `B.append`
" " `B.append` mode `B.append`
" " `B.append` usr
showCommand (MMode chan mode Nothing) = "MODE " `B.append` chan `B.append`
" " `B.append` mode
showCommand (MTopic chan (Just msg)) = "TOPIC " `B.append` chan `B.append`
" :" `B.append` msg
showCommand (MTopic chan Nothing) = "TOPIC " `B.append` chan
showCommand (MInvite usr chan) = "INVITE " `B.append` usr `B.append`
" " `B.append` chan
showCommand (MKick chan usr msg) = "KICK " `B.append` chan `B.append`
" " `B.append` usr `B.append`
" :" `B.append` msg
showCommand (MQuit msg) = "QUIT :" `B.append` msg
showCommand (MNick nick) = "NICK " `B.append` nick
showCommand (MNotice chan msg) = "NOTICE " `B.append` chan `B.append`
" :" `B.append` msg
showCommand (MAction chan msg) = showCommand $ MPrivmsg chan
("\x01ACTION " `B.append` msg
`B.append` "\x01")
|
