~singpolyma/cheogram-muc-bridge

ref: 2460ca844a747f202ae179a90c2daace5d331657 cheogram-muc-bridge/gateway.hs -rw-r--r-- 5.3 KiB
2460ca84Stephen Paul Weber Replace mentioned nicks with their ghost equivalent 11 months ago
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
module Main (main) where

import Prelude ()
import BasicPrelude
import System.IO
	(stdout, stderr, hSetBuffering, BufferMode(LineBuffering))
import Control.Error                   (exceptT, justZ)
import qualified Data.Text             as T
import qualified Data.XML.Types        as XML
import qualified Network.Protocol.XMPP as XMPP

import qualified Config
import qualified Session
import Router
import Util

hasMucCode :: Int -> XMPP.Presence -> Bool
hasMucCode code XMPP.Presence { XMPP.presencePayloads = p } =
	elem (tshow code) $
	maybeToList . XML.attributeText (s"code")
	=<< XML.isNamed (s"{http://jabber.org/protocol/muc#user}status")
	=<< XML.elementChildren
	=<< XML.isNamed (s"{http://jabber.org/protocol/muc#user}x") =<< p

targets :: Config.Config -> XMPP.JID -> [XMPP.JID]
targets config from = mapMaybe (\bridge ->
		if bareTxt (Config.muc1 bridge) == bareTxt from then
			Just $ Config.muc2 bridge
		else if bareTxt (Config.muc2 bridge) == bareTxt from then
			Just $ Config.muc1 bridge
		else
			Nothing
	) (Config.mucs config)

handlePresence :: Config.Config -> XMPP.Presence -> XMPP.XMPP ()
handlePresence config presence@XMPP.Presence {
	XMPP.presenceFrom = Just from,
	XMPP.presenceTo = Just to
}
	| bareTxt to /= bareTxt (Config.bridgeJid config) =
		-- This is to one of our ghosts, so just ignore it
		return ()
	| hasMucCode 110 presence = return () -- ignore self presence
	| Just resource <- XMPP.jidResource from,
	  not (s"[x]" `T.isInfixOf` XMPP.strResource resource) = forM_ (targets config from) $
		Session.sendPresence config presence
handlePresence _ _ = return ()

handlePresenceError :: Config.Config -> XMPP.Presence -> XMPP.XMPP ()
handlePresenceError config XMPP.Presence {
	XMPP.presenceFrom = Just from@XMPP.JID {
		XMPP.jidResource = Just resource
	},
	XMPP.presenceTo = Just XMPP.JID { XMPP.jidNode = Just node },
	XMPP.presencePayloads = p
} |
	Just originalSource <- XMPP.parseJID $ unescapeJid $ XMPP.strNode node,
	[err] <- XML.isNamed (s"{jabber:component:accept}error") =<< p,
	[_] <- XML.isNamed (s"{urn:ietf:params:xml:ns:xmpp-stanzas}conflict") =<<
		XML.elementChildren err =
			let
				toSend = (mucJoin muc (nick ++ s"_")) {
					XMPP.presenceFrom = Just originalSource
				}
				Just target = XMPP.presenceTo toSend
			in Session.sendPresence config toSend target
	where
	nick = XMPP.strResource resource
	Just muc = XMPP.parseJID $ bareTxt from
handlePresenceError _ _ = return ()

handleGroupChat :: Config.Config -> XMPP.Message -> XMPP.XMPP ()
handleGroupChat config message@XMPP.Message {
	XMPP.messageFrom = Just from,
	XMPP.messageTo = Just to
}
	| bareTxt to /= bareTxt (Config.bridgeJid config) =
		-- This is to one of our ghosts, so just ignore it
		return ()
	| otherwise = forM_ (targets config from) $
		Session.sendGroupChat config message
handleGroupChat _ _ = return ()

handleMessage :: Config.Config -> XMPP.Message -> XMPP.XMPP ()
handleMessage config message@XMPP.Message {
	XMPP.messageFrom = Just from@XMPP.JID { XMPP.jidNode = Just fromNode },
	XMPP.messageTo = Just XMPP.JID { XMPP.jidNode = Just node }
}
	| not $ null $ targets config from =
		XMPP.putStanza $ message {
			XMPP.messageFrom = Just (proxyJid config from),
			XMPP.messageTo = target
		}
	| Just fakeFrom <- maybeFakeFrom =
		XMPP.putStanza $ message {
			XMPP.messageFrom = Just (proxyJid config fakeFrom),
			XMPP.messageTo = target
		}
	where
	target = XMPP.parseJID $ unescapeJid $ XMPP.strNode node
	-- This is basically just for biboumi
	-- If we get a direct message from a non-MUC source
	-- check if there are any MUCs bridged to the given target
	-- with a domain matching the domain of the from
	-- and if so use the localpart (minus any %suffix) as a nick from that source
	maybeFakeFrom = (XMPP.parseJID =<<) $
		fmap ((++ s"/" ++ T.takeWhile (/='%') (XMPP.strNode fromNode)) . bareTxt) $
		find (\source -> XMPP.jidDomain source == XMPP.jidDomain from) $
		targets config =<< justZ target
handleMessage _ _ = return ()

handleIq :: Config.Config -> XMPP.IQ -> XMPP.XMPP ()
handleIq config iq@XMPP.IQ {
	XMPP.iqFrom = Just from@XMPP.JID { XMPP.jidNode = Just _ },
	XMPP.iqTo = Just XMPP.JID { XMPP.jidNode = Just node }
}
	| not $ null $ targets config from =
		XMPP.putStanza $ iq {
			XMPP.iqFrom = Just (proxyJid config from),
			XMPP.iqTo = target
		}
	where
	target = XMPP.parseJID $ unescapeJid $ XMPP.strNode node
handleIq _ _ = return ()

joinFromBridge :: Config.Config -> XMPP.JID -> XMPP.XMPP ()
joinFromBridge config muc = do
	Session.mkSession config XMPP.PresenceAvailable Nothing muc
	XMPP.putStanza $ (mucJoin muc (Config.nick config)) {
			XMPP.presenceFrom = Just $ Config.bridgeJid config
		}

main :: IO ()
main = do
	hSetBuffering stdout LineBuffering
	hSetBuffering stderr LineBuffering

	config <- Config.setup =<< fmap head getArgs

	let server = XMPP.Server
		(Config.componentJid config)
		(Config.host $ Config.server config)
		(Config.port $ Config.server config)

	exceptT print return $
		runRoutedComponent server (Config.secret config) $ do
			forM_ (Config.mucs config) $ \bridge -> do
				joinFromBridge config (Config.muc1 bridge)
				joinFromBridge config (Config.muc2 bridge)
			return $ defaultRoutes {
				presenceRoute = handlePresence config,
				presenceErrorRoute = handlePresenceError config,
				messageGroupChatRoute = handleGroupChat config,
				messageRoute = handleMessage config,
				iqRoute = handleIq config
			}