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41 lines
1.5 KiB
41 lines
1.5 KiB
{-# OPTIONS_HADDOCK hide #-} |
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module Network.Xmpp.Concurrent.Presence where |
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import Control.Applicative ((<$>)) |
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import Control.Concurrent.STM |
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import Network.Xmpp.Types |
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import Network.Xmpp.Concurrent.Types |
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import Network.Xmpp.Concurrent.Basic |
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-- | Read an element from the inbound stanza channel, discardes any non-Presence |
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-- stanzas from the channel |
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pullPresenceA :: Session -> IO (Either (Annotated PresenceError) |
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(Annotated Presence)) |
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pullPresenceA session = do |
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(stanza, as) <- atomically . readTChan $ stanzaCh session |
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case stanza of |
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PresenceS p -> return $ Right (p, as) |
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PresenceErrorS e -> return $ Left (e, as) |
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_ -> pullPresenceA session |
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pullPresence :: Session -> IO (Either PresenceError Presence) |
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pullPresence s = either (Left . fst) (Right . fst) <$> pullPresenceA s |
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-- | Pulls a (non-error) presence and returns it if the given predicate returns |
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-- @True@. |
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waitForPresenceA :: (Annotated Presence -> Bool) |
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-> Session |
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-> IO (Annotated Presence) |
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waitForPresenceA f session = do |
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s <- pullPresenceA session |
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case s of |
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Left _ -> waitForPresenceA f session |
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Right m | f m -> return m |
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| otherwise -> waitForPresenceA f session |
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waitForPresence :: (Presence -> Bool) -> Session -> IO Presence |
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waitForPresence f s = fst <$> waitForPresenceA (f . fst) s |
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-- | Send a presence stanza. |
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sendPresence :: Presence -> Session -> IO (Either XmppFailure ()) |
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sendPresence p session = sendStanza (PresenceS p) session
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