blob: d146d17656f7578cbfb7d3b9fc45718d2a1e11f5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Mail
-- Copyright : (c) Spencer Janssen
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Spencer Janssen <sjanssen@cse.unl.edu>
-- Stability : unstable
-- Portability : unportable
--
-- A plugin for checking mail.
--
-----------------------------------------------------------------------------
module Plugins.Mail where
import Plugins
import Plugins.Utils (expandHome, changeLoop)
import Control.Monad
import Control.Concurrent.STM
import System.Directory
import System.FilePath
import System.INotify
import Data.List (isPrefixOf)
import Data.Set (Set)
import qualified Data.Set as S
-- | A list of mail box names and paths to maildirs.
data Mail = Mail [(String, FilePath)] String
deriving (Read, Show)
instance Exec Mail where
alias (Mail _ a) = a
start (Mail ms _) cb = do
vs <- mapM (const $ newTVarIO S.empty) ms
let ts = map fst ms
rs = map ((</> "new") . snd) ms
ev = [Move, MoveIn, MoveOut, Create, Delete]
ds <- mapM expandHome rs
i <- initINotify
zipWithM_ (\d v -> addWatch i ev d (handle v)) ds vs
forM_ (zip ds vs) $ \(d, v) -> do
s <- fmap (S.fromList . filter (not . isPrefixOf "."))
$ getDirectoryContents d
atomically $ modifyTVar v (S.union s)
changeLoop (mapM (fmap S.size . readTVar) vs) $ \ns ->
cb . unwords $ [m ++ ":" ++ show n
| (m, n) <- zip ts ns
, n /= 0 ]
handle :: TVar (Set String) -> Event -> IO ()
handle v e = atomically $ modifyTVar v $ case e of
Created {} -> create
MovedIn {} -> create
Deleted {} -> delete
MovedOut {} -> delete
_ -> id
where
delete = S.delete (filePath e)
create = S.insert (filePath e)
|
