notifications on drop

Annex/Notification.hs

@@ -0,0 +1,81 @@
+{- git-annex desktop notifications
+ -
+ - Copyright 2014 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+{-# LANGUAGE CPP #-}
+
+module Annex.Notification where
+
+import qualified Annex
+import Logs.Transfer
+#ifdef WITH_DBUS_NOTIFICATIONS
+import Common.Annex
+import Types.DesktopNotify
+import qualified DBus.Notify as Notify
+import qualified DBus.Client
+#endif
+
+-- Witness that notification has happened.
+data NotifyWitness = NotifyWitness
+
+{- Wrap around an action that performs a transfer, which may run multiple
+ - attempts. Displays notification when supported and when the user asked
+ - for it. -}
+notifyTransfer :: Direction -> Maybe FilePath -> (NotifyWitness -> Annex Bool) -> Annex Bool
+notifyTransfer _ Nothing a = a NotifyWitness
+notifyTransfer direction (Just f) a = do
+#ifdef WITH_DBUS_NOTIFICATIONS
+	wanted <- Annex.getState Annex.desktopnotify
+	let action = if direction == Upload then "uploading" else "downloading"
+	let basedesc = action ++ " " ++ f
+	let startdesc = "started " ++ basedesc
+	let enddesc ok = if ok
+		then "finished " ++ basedesc
+		else basedesc ++ " failed"
+	if (notifyStart wanted || notifyFinish wanted)
+		then do
+			client <- liftIO DBus.Client.connectSession
+			startnotification <- liftIO $ if notifyStart wanted
+				then Just <$> Notify.notify client (mkNote startdesc)
+				else pure Nothing
+			ok <- a NotifyWitness
+			when (notifyFinish wanted) $ liftIO $ void $ maybe 
+				(Notify.notify client $ mkNote $ enddesc ok)
+				(\n -> Notify.replace client n $ mkNote $ enddesc ok)
+				startnotification
+			return ok
+		else a NotifyWitness
+#else
+	a NotifyWitness
+#endif
+
+notifyDrop :: Maybe FilePath -> Bool -> Annex ()
+notifyDrop Nothing _ = noop
+notifyDrop (Just f) ok = do
+#ifdef WITH_DBUS_NOTIFICATIONS
+	wanted <- Annex.getState Annex.desktopnotify
+	when (notifyFinish wanted) $ liftIO $ do
+		client <- DBus.Client.connectSession
+		let msg = if ok
+			then "dropped " ++ f
+			else "failed to drop" ++ f
+		void $ Notify.notify client (mkNote msg)
+#else
+	noop
+#endif
+
+#ifdef WITH_DBUS_NOTIFICATIONS
+mkNote :: String -> Notify.Note
+mkNote desc = Notify.blankNote
+	{ Notify.appName = "git-annex"
+	, Notify.body = Just $ Notify.Text desc
+	, Notify.hints =
+		[ Notify.Category Notify.Transfer
+		, Notify.Urgency Notify.Low
+		, Notify.SuppressSound True
+		]
+	}
+#endif