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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 Network.Protocol.XMPP
import qualified Data.Map as M
import qualified Data.Set as S
import Data.Ord
newtype Client = Client JID
deriving (Eq, Show)
instance Ord Client where
compare = comparing show
data Buddy = Buddy
{ buddyPresent :: S.Set Client
, buddyAway :: S.Set Client
, buddyAssistants :: S.Set Client
}
deriving (Eq, Show)
{- Note that the buddy map includes one buddy for the user's own JID,
- so that we can track other git-annex assistant's sharing the same
- account. -}
type Buddies = M.Map String Buddy
genKey :: JID -> String
genKey j = show $ JID (jidNode j) (jidDomain j) Nothing
{- 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
| isGitAnnexPresence p = b
{ buddyAssistants = addto $ buddyAssistants b }
| presenceType p == PresenceAvailable = b
{ buddyPresent = addto $ buddyPresent b
, buddyAway = removefrom $ buddyAway b
}
| presenceType p == PresenceUnavailable = b
{ buddyAway = addto $ buddyAway b
, buddyPresent = removefrom $ buddyPresent b
}
| otherwise = b
where
client = Client jid
removefrom = S.filter (/= client)
addto = S.insert client
|
