IRCBot.icl

   1 implementation module IRCBot
   2
   3 from Data.Func import $
   4 import Data.Either
   5 import Data.Error
   6 import Data.Maybe
   7 import IRC
   8 import TCPIP
   9
  10 from Text import class Text(split,join), instance Text String
  11
  12 import StdList
  13 import StdBool
  14
  15 TIMEOUT :== Just 1000
  16
  17 bot :: (String, Int) [IRCMessage] [IRCMessage] a (IRCMessage a *World -> (Maybe [IRCMessage], a, *World)) *World -> (MaybeErrorString a, *World)
  18 bot (host, port) start end state bot w
  19 //Lookup hostname
  20 # (ip, w) = lookupIPAddress host w
  21 | isNothing ip = (Error $ "DNS lookup for " +++ host +++ " failed", w)
  22 //Connect
  23 # (rpt,chan,w) = connectTCP_MT TIMEOUT (fromJust ip, port) w
  24 | rpt == TR_Expired = (Error $ "Connection to " +++ host +++ " timed out", w)
  25 | rpt == TR_NoSuccess = (Error $ "Could not connect to " +++ host, w)
  26 // Send startup commands
  27 # (merr, chan, w) = send (map toString start) (fromJust chan) w
  28 | isError merr = (Error $ fromError merr, w)
  29 //Start processing function
  30 # (mer, chan, state, w) = process chan "" state bot w
  31 | isError mer = (Error $ fromError mer, w)
  32 // Send shutdown commands
  33 # (merr, {rChannel,sChannel}, w) = send (map toString end) chan w
  34 | isError merr = (Error $ fromError merr, w)
  35 //Close channels
  36 = (Ok state, closeChannel sChannel (closeRChannel rChannel w))
  37
  38 import StdDebug,StdMisc
  39 process :: TCP_DuplexChannel String a (IRCMessage a *World -> (Maybe [IRCMessage], a, *World)) *World -> (MaybeErrorString (), TCP_DuplexChannel, a, *World)
  40 process chan acc state bot w
  41 //See if we have a message
  42 = case split "\r\n" acc of
  43         //We only have one message that is not complete
  44         [m]
  45                 //Receive
  46                 # (merr_resp, chan, w) = recv chan w
  47                 | isError merr_resp = (Error (fromError merr_resp), chan, state, w)
  48                 # (Ok mresp) = merr_resp
  49                 | isNothing mresp = process chan acc state bot w
  50                 = process chan (m +++ fromJust mresp) state bot w
  51         //We have a successfull split and therefore we process at least one message
  52         [m:xs]
  53                 # acc = join "\r\n" xs
  54                 | not (trace_tn $ "Full message: '" +++ m +++ "'") = undef
  55                 = case parseIRCMessage $ m +++ "\r\n" of
  56                         (Left err) = (Error $ "IRC Parsing error: " +++ join "\n" err, chan, state, w)
  57                         (Right msg)
  58                         # (mircc, state, w) = bot msg state w
  59                         | isNothing mircc = (Ok (), chan, state, w) // Bot asks to quit
  60                         //Possible send the commands
  61                         # (merr, chan, w) = send (map toString $ fromJust mircc) chan w
  62                         | isError merr = (Error $ fromError merr, chan, state, w)
  63                         //Recurse
  64                         = process chan acc state bot w
  65
  66 send :: [String] TCP_DuplexChannel *World -> (MaybeErrorString (), TCP_DuplexChannel, *World)
  67 send [] chan w = (Ok (), chan, w)
  68 send [msg:msgs] {sChannel,rChannel} w
  69 # (_, w) = sleep 250000 w
  70 # (rpt,i,sChannel,w) = send_MT TIMEOUT (toByteSeq msg) sChannel w
  71 | rpt <> TR_Success = (Error "Could not send message", {sChannel=sChannel,rChannel=rChannel}, w)
  72 = send msgs {sChannel=sChannel,rChannel=rChannel} w
  73         where
  74                 sleep :: !Int !*World -> (!Int, *World)
  75                 sleep i w = code {
  76                                 ccall usleep "I:I:A"
  77                         }
  78
  79 recv :: TCP_DuplexChannel *World -> (MaybeErrorString (Maybe String), TCP_DuplexChannel, *World)
  80 recv {sChannel,rChannel} w
  81 # (rpt, resp, rChannel, w) = receive_MT TIMEOUT rChannel w
  82 | rpt == TR_Expired = (Ok Nothing, {sChannel=sChannel,rChannel=rChannel}, w)
  83 | rpt == TR_NoSuccess || isNothing resp = (Error "Timeout recv fail", {sChannel=sChannel,rChannel=rChannel}, w)
  84 = (Ok $ Just $ toString $ fromJust resp, {sChannel=sChannel,rChannel=rChannel}, w)