move display of transfer scan in progress to transfers section of dashboard

This way it's only visible when transfers are not running, which is about
what a user would expect.

Assistant/Alert.hs

@@ -240,13 +240,6 @@ commitAlert = activityAlert Nothing
 showRemotes :: [Remote] -> TenseChunk
 showRemotes = UnTensed . T.intercalate ", " . map (T.pack . Remote.name)
 
-scanAlert :: Alert
-scanAlert = baseActivityAlert
-	{ alertHeader = Just $
-		tenseWords [Tensed "Scanning" "Scanned", "for file transfers"]
-	, alertPriority = Low
-	}
-
 syncAlert :: [Remote] -> Alert
 syncAlert rs = baseActivityAlert
 	{ alertName = Just SyncAlert

Assistant/Threads/TransferScanner.hs

@@ -14,13 +14,13 @@ import Assistant.TransferQueue
 import Assistant.DaemonStatus
 import Assistant.Drop
 import Assistant.Sync
-import Assistant.Alert
 import Logs.Transfer
 import Logs.Location
 import Logs.Web (webUUID)
 import qualified Remote
 import qualified Types.Remote as Remote
 import Utility.ThreadScheduler
+import Utility.NotificationBroadcaster
 import qualified Git.LsFiles as LsFiles
 import qualified Backend
 import Annex.Content
@@ -37,17 +37,22 @@ transferScannerThread = namedThread "TransferScanner" $ do
 	go S.empty
   where
 	go scanned = do
+		scanrunning False
 		liftIO $ threadDelaySeconds (Seconds 2)
 		(rs, infos) <- unzip <$> getScanRemote
-		void $ alertWhile scanAlert $ do
-			if any fullScan infos || any (`S.notMember` scanned) rs
-				then do
-					expensiveScan rs
-					go $ scanned `S.union` S.fromList rs
-				else do
-					mapM_ failedTransferScan rs
-					go scanned
-			return True
+		scanrunning True
+		if any fullScan infos || any (`S.notMember` scanned) rs
+			then do
+				expensiveScan rs
+				go $ scanned `S.union` S.fromList rs
+			else do
+				mapM_ failedTransferScan rs
+				go scanned
+	scanrunning b = do
+		ds <- modifyDaemonStatus $ \s -> 
+			(s { transferScanRunning = b }, s)
+		liftIO $ sendNotification $ transferNotifier ds
+		
 	{- All git remotes are synced, and all available remotes
 	 - are scanned in full on startup, for multiple reasons, including:
 	 -

Assistant/Types/DaemonStatus.hs

@@ -35,6 +35,8 @@ data DaemonStatus = DaemonStatus
 	, sanityCheckRunning :: Bool
 	-- Last time the sanity checker ran
 	, lastSanityCheck :: Maybe POSIXTime
+	-- True when a scan for file transfers is running
+	, transferScanRunning :: Bool
 	-- Currently running file content transfers
 	, currentTransfers :: TransferMap
 	-- Messages to display to the user.
@@ -77,6 +79,7 @@ newDaemonStatus = DaemonStatus
 	<*> pure Nothing
 	<*> pure False
 	<*> pure Nothing
+	<*> pure False
 	<*> pure M.empty
 	<*> pure M.empty
 	<*> pure firstAlertId

Assistant/WebApp/DashBoard.hs

@@ -14,6 +14,7 @@ import Assistant.WebApp.Utility
 import Assistant.WebApp.RepoList
 import Assistant.WebApp.Notifications
 import Assistant.TransferQueue
+import Assistant.DaemonStatus
 import Utility.NotificationBroadcaster
 import Logs.Transfer
 import Utility.Percentage
@@ -37,6 +38,10 @@ transfersDisplay warnNoScript = do
 	queued <- take 10 <$> liftAssistant getTransferQueue
 	autoUpdate ident NotifierTransfersR (10 :: Int) (10 :: Int)
 	let transfers = simplifyTransfers $ current ++ queued
+	let transfersrunning = not $ null transfers
+	scanrunning <- if transfersrunning
+		then return False
+		else liftAssistant $ transferScanRunning <$> getDaemonStatus
 	$(widgetFile "dashboard/transfers")
   where
 	ident = "transfers"

templates/dashboard/transfers.hamlet

@@ -1,9 +1,6 @@
 <div ##{ident}>
   <h2>Transfers
-  $if null transfers
-    <i>
-      (no file transfers running)
-  $else
+  $if transfersrunning
     $forall (transfer, info) <- transfers
       $with percent <- maybe "unknown" (showPercentage 0) $ percentComplete transfer info
         <div .row-fluid>
@@ -39,3 +36,9 @@
             $else
               ^{actionButton (StartTransferR transfer) Nothing (Just "continue") "btn" "icon-play"}
             ^{actionButton (CancelTransferR transfer) Nothing (Just "cancel") "btn" "icon-remove"}
+  $else
+    $if scanrunning
+      <i .icon-refresh></i> Scanning for files to transfer
+    $else
+      <i>
+        (No file transfers running)