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|
{- xmpp buddies
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Assistant.XMPP.Buddies where
import Assistant.XMPP
import Common.Annex
import Assistant.Types.Buddies
import Network.Protocol.XMPP
import qualified Data.Map as M
import qualified Data.Set as S
import Data.Text (Text)
import qualified Data.Text as T
genKey :: JID -> BuddyKey
genKey j = BuddyKey $ formatJID $ baseJID j
buddyName :: JID -> Text
buddyName j = maybe (T.pack "") strNode (jidNode j)
{- Summary of info about a buddy.
-
- If the buddy has no clients at all anymore, returns Nothing. -}
buddySummary :: Buddy -> Maybe (Text, Bool, Bool, BuddyKey)
buddySummary b = case clients of
((Client j):_) -> Just (buddyName j, away, canpair, genKey j)
[] -> Nothing
where
away = S.null (buddyPresent b) && S.null (buddyAssistants b)
canpair = not $ S.null (buddyAssistants b)
clients = S.toList $ buddyPresent b `S.union` buddyAway b `S.union` buddyAssistants b
{- Updates the buddies with XMPP presence info. -}
updateBuddies :: Presence -> Buddies -> Buddies
updateBuddies p@(Presence { presenceFrom = Just jid }) = M.alter update key
where
key = genKey jid
update (Just b) = Just $ applyPresence p b
update Nothing = newBuddy p
updateBuddies _ = id
{- Creates a new buddy based on XMPP presence info. -}
newBuddy :: Presence -> Maybe Buddy
newBuddy p
| presenceType p == PresenceAvailable = go
| presenceType p == PresenceUnavailable = go
| otherwise = Nothing
where
go = make <$> presenceFrom p
make _jid = applyPresence p $ Buddy
{ buddyPresent = S.empty
, buddyAway = S.empty
, buddyAssistants = S.empty
}
applyPresence :: Presence -> Buddy -> Buddy
applyPresence p b = fromMaybe b $! go <$> presenceFrom p
where
go jid
| presenceType p == PresenceUnavailable = b
{ buddyAway = addto $ buddyAway b
, buddyPresent = removefrom $ buddyPresent b
, buddyAssistants = removefrom $ buddyAssistants b
}
| hasGitAnnexTag p = b
{ buddyAssistants = addto $ buddyAssistants b
, buddyAway = removefrom $ buddyAway b }
| presenceType p == PresenceAvailable = b
{ buddyPresent = addto $ buddyPresent b
, buddyAway = removefrom $ buddyAway b
}
| otherwise = b
where
client = Client jid
removefrom = S.filter (/= client)
addto = S.insert client
|
