webapp: Now allows restarting any threads that crash.

Assistant/Types/DaemonStatus.hs

@@ -14,6 +14,7 @@ import Assistant.Alert
 import Assistant.Pairing
 import Utility.NotificationBroadcaster
 import Logs.Transfer
+import Assistant.Types.ThreadName
 
 import Control.Concurrent.STM
 import Control.Concurrent.Async
@@ -21,8 +22,9 @@ import Data.Time.Clock.POSIX
 import qualified Data.Map as M
 
 data DaemonStatus = DaemonStatus
-	-- All the named threads that comprise the daemon.
-	{ startedThreads :: M.Map String (Async ())
+	-- All the named threads that comprise the daemon,
+	-- and actions to run to restart them.
+	{ startedThreads :: M.Map ThreadName (Async (), IO ())
 	-- False when the daemon is performing its startup scan
 	, scanComplete :: Bool
 	-- Time when a previous process of the daemon was running ok

Assistant/Types/NamedThread.hs

@@ -0,0 +1,17 @@
+{- named threads
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Assistant.Types.NamedThread where
+
+import Assistant.Monad
+import Assistant.Types.ThreadName
+
+{- Information about a named thread that can be run. -}
+data NamedThread = NamedThread ThreadName (Assistant ())
+
+namedThread :: String -> Assistant () -> NamedThread
+namedThread name a = NamedThread (ThreadName name) a

Assistant/Types/ThreadName.hs

@@ -0,0 +1,14 @@
+{- name of a thread
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Assistant.Types.ThreadName where
+
+newtype ThreadName = ThreadName String
+	deriving (Eq, Read, Show, Ord)
+
+fromThreadName :: ThreadName -> String
+fromThreadName (ThreadName n) = n