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59 lines
2.1 KiB
59 lines
2.1 KiB
{-# OPTIONS_HADDOCK hide #-} |
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module Network.Xmpp.Concurrent.Message where |
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import Network.Xmpp.Concurrent.Types |
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import Control.Concurrent.STM |
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import Data.IORef |
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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 |
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-- non-Message stanzas from the channel |
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pullMessage :: Session -> IO (Either MessageError Message) |
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pullMessage session = do |
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stanza <- atomically . readTChan $ stanzaCh session |
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case stanza of |
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MessageS m -> return $ Right m |
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MessageErrorS e -> return $ Left e |
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_ -> pullMessage session |
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-- | Get the next received message |
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getMessage :: Session -> IO Message |
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getMessage = waitForMessage (const True) |
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-- | Pulls a (non-error) message and returns it if the given predicate returns |
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-- @True@. |
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waitForMessage :: (Message -> Bool) -> Session -> IO Message |
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waitForMessage f session = do |
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s <- pullMessage session |
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case s of |
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Left _ -> waitForMessage f session |
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Right m | f m -> return m |
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| otherwise -> waitForMessage f session |
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-- | Pulls an error message and returns it if the given predicate returns @True@. |
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waitForMessageError :: (MessageError -> Bool) -> Session -> IO MessageError |
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waitForMessageError f session = do |
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s <- pullMessage session |
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case s of |
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Right _ -> waitForMessageError f session |
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Left m | f m -> return m |
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| otherwise -> waitForMessageError f session |
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-- | Pulls a message and returns it if the given predicate returns @True@. |
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filterMessages :: (MessageError -> Bool) |
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-> (Message -> Bool) |
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-> Session -> IO (Either MessageError Message) |
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filterMessages f g session = do |
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s <- pullMessage session |
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case s of |
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Left e | f e -> return $ Left e |
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| otherwise -> filterMessages f g session |
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Right m | g m -> return $ Right m |
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| otherwise -> filterMessages f g session |
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-- | Send a message stanza. |
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sendMessage :: Message -> Session -> IO () |
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sendMessage m session = sendStanza (MessageS m) session
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