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monadize

main
nek0 3 months ago
parent
commit
b7da959c06
  1. 3
      parrotbot.cabal
  2. 4
      shell.nix
  3. 105
      src/Main.hs
  4. 11
      src/Types.hs

3
parrotbot.cabal

@ -23,11 +23,12 @@ executable parrotbot
main-is: Main.hs
-- Modules included in this executable, other than Main.
-- other-modules:
other-modules: Types
-- LANGUAGE extensions used by modules in this package.
-- other-extensions:
build-depends: base >=4.14.1.0
, network
, mtl
hs-source-dirs: src
default-language: Haskell2010

4
shell.nix

@ -4,14 +4,14 @@ let
inherit (nixpkgs) pkgs;
f = { mkDerivation, base, lib, network }:
f = { mkDerivation, base, lib, mtl, network }:
mkDerivation {
pname = "parrotbot";
version = "0.0.0.0";
src = ./.;
isLibrary = false;
isExecutable = true;
executableHaskellDepends = [ base network ];
executableHaskellDepends = [ base mtl network ];
description = "polly wanna cracker";
license = lib.licenses.gpl3Plus;
};

105
src/Main.hs

@ -4,30 +4,62 @@ module Main where
import System.IO
import System.Exit (exitSuccess)
import Control.Exception (bracket, bracket_)
import Control.Monad.Reader
import Control.Monad.IO.Class (liftIO)
import Data.List (intercalate, isPrefixOf)
import qualified Network.Socket as N
-- internal imports
import Types
-- configuration options (TODO: Move to yaml and read from there)
server = "irc.freenode.org"
port = 6667
chan = "#parrotbot-testing"
nick = "parrotbot"
-- | Entry point
main :: IO ()
main = do
handle <- connect server port
write handle "NICK" nick
write handle "USER" (nick <> " 0 * :parrot bot")
write handle "JOIN" chan
listen handle
-- | Connect to an IRC server given domain name and port
main =
bracket connect disconnect loop
where
disconnect = hClose . botSocket
loop st = runReaderT run st
-- | Process bot comands inside of its monad
run
:: Net ()
run = do
write "NICK" nick
write "USER" (nick <> " 0 * :parrot bot")
write "JOIN" chan
listen
-- | Connect to the server und return the initial bot state
connect
:: IO Bot
connect = notify $ do
handle <- connectTo server port
return (Bot handle)
where
notify a = bracket_
(do
putStrLn ("Connecting to " <> server <> "")
hFlush stdout
)
(putStrLn "done.")
a
-- | Connect to an IRC server given domain name and port (Helper for 'connect'
connectTo
:: N.HostName -- ^ Domain to connect to
-> N.PortNumber -- ^ Port to connect to
-> IO Handle -- ^ Handle for the connection
connect chost cport = do
connectTo chost cport = do
(addr:_) <- N.getAddrInfo Nothing (Just chost) (Just (show cport))
sock <- N.socket
(N.addrFamily addr)
@ -38,37 +70,37 @@ connect chost cport = do
-- | Send messages to IRC
write
:: Handle -- ^ Connection handle
-> String -- ^ Command to issue
:: String -- ^ Command to issue
-> String -- ^ Command argument(s)
-> IO ()
write handle cmd args = do
-> Net ()
write cmd args = do
let msg = intercalate " " [cmd, args, "\r\n"]
hPutStr handle msg
print ("> " <> msg)
handle <- asks botSocket
liftIO $ do
hPutStr handle msg
putStr ("> " <> msg)
-- | Send Messages via PRIVMSG to the connected Channel
privmsg
:: Handle -- ^ Connection handle
-> String -- ^ Message Content
-> IO ()
privmsg handle msg = write handle "PRIVMSG" (chan <> " :" <> msg)
:: String -- ^ Message Content
-> Net ()
privmsg msg = write "PRIVMSG" (chan <> " :" <> msg)
-- | Listen to and process messages from IRC
listen
:: Handle -- ^ Connection handle
-> IO ()
listen handle = forever $ do
line <- hGetLine handle
putStrLn line
:: Net ()
listen = forever $ do
handle <- asks botSocket
line <- liftIO $ hGetLine handle
liftIO $ putStrLn line
let s = init line
if isPing s
then
pong s
else
evaluate handle (clean s)
evaluate (clean s)
where
forever :: IO () -> IO ()
forever :: Net () -> Net ()
forever a = do
a
forever a
@ -79,18 +111,17 @@ listen handle = forever $ do
isPing :: String -> Bool
isPing s = "PING" `isPrefixOf` s
pong :: String -> IO ()
pong x = write handle "PONG" (':' : drop 6 x)
pong :: String -> Net ()
pong x = write "PONG" (':' : drop 6 x)
-- | Evaluate input from IRC
evaluate
:: Handle -- ^ Connection handle
-> String -- ^ Input to be processed
-> IO ()
evaluate handle "!quit" = do
write handle "QUIT" ":I have been orderd to go"
exitSuccess
evaluate handle text | "!say " `isPrefixOf` text =
privmsg handle (drop 4 text)
evaluate _ _ =
:: String -- ^ Input to be processed
-> Net ()
evaluate "!quit" = do
write "QUIT" ":I have been orderd to go"
liftIO exitSuccess
evaluate text | "!say " `isPrefixOf` text =
privmsg (drop 5 text)
evaluate _ =
return ()

11
src/Types.hs

@ -0,0 +1,11 @@
module Types where
import Control.Monad.Reader (ReaderT(..))
import System.IO (Handle)
data Bot = Bot
{ botSocket :: Handle
}
type Net = ReaderT Bot IO
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