summaryrefslogtreecommitdiffstats
path: root/test5.hs
blob: 20d97fba96abb203a8ee1d3b123b21162c8a6042 (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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}

module Main (main) where

import qualified Data.Text as T
import qualified Data.Text.IO as T
import qualified Data.Tree as Tree
import qualified Data.Tree.Zipper as Z
import qualified Notmuch
import qualified Notmuch.Message as Notmuch
import qualified Notmuch.SearchResult as Notmuch
import qualified System.Console.Terminal.Size as Term
import Control.Applicative
import Control.Concurrent
import Control.Exception
import Control.Monad
import Data.List (intercalate)
import Data.Maybe
import Data.Monoid
import Data.Time
import Event
import Scanner (scan)
import System.Directory
import System.Environment
import System.Exit
import System.IO
import System.Posix.Files
import System.Posix.Signals
import System.Process
import TagUtils
import Trammel
import TreeSearch
import TreeView
import TreeViewRaw
import Utils



data State = State
    { cursor :: Z.TreePos Z.Full TreeView
    , xoffset :: Int
    , yoffset :: Int
    , flashMessage :: Trammel String
    , screenWidth :: Int
    , screenHeight :: Int
    , headBuffer :: [Trammel String]
    , treeBuffer :: [Trammel String]
    , now :: UTCTime
    , decset :: [Int]
    , decrst :: [Int]
    }


initState :: IO State
initState = do
    let query = "tag:inbox AND NOT tag:killed"

    r_ <- either error id <$> Notmuch.search query

    return State
        { cursor = Z.fromTree $ fromSearchResults query r_
        , xoffset = 0
        , yoffset = 0
        , flashMessage = "Welcome to much; quit with ^C"
        , screenWidth = 0
        , screenHeight = 0
        , headBuffer = []
        , treeBuffer = []
        , now = UTCTime (fromGregorian 1984 5 23) 49062
        , decset =
            1000 : -- X & Y on button press and release
            1005 : -- UTF-8 mouse mode
            1049 : -- use cleared alternate screen buffer
            []
        , decrst =
            25 : -- hide cursor
            []
        }


main :: IO ()
main =
    bracket initState cleanup startup


cleanup :: State -> IO ()
cleanup q@State{..} = do
    hSetEcho stdin True
    resetTerm q { decset = decrst, decrst = decset }


startup :: State -> IO ()
startup q0 = do

    -- load-env hack
    maybe (return ()) (setEnv "HOME") =<< lookupEnv "OLDHOME"

    -- TODO move this to resetTerm?
    hSetBuffering stdin NoBuffering
    hSetBuffering stdout (BlockBuffering $ Just 4096)

    resetTerm q0

    (putEvent, getEvent) <- do
        v <- newEmptyMVar
        return (putMVar v, takeMVar v)

    (shutdown, waitForShutdown) <- do
        v <- newEmptyMVar
        return (putMVar v (), takeMVar v)


    mapM_ (\(s, f) -> installHandler s (Catch f) Nothing)
        [ (sigINT, shutdown)
        , (28, winchHandler putEvent)
        ]

    threadIds <- mapM forkIO
        [ forever $ scan stdin >>= putEvent
        , run getEvent q0
        ]

    winchHandler putEvent

    waitForShutdown
    mapM_ killThread threadIds


resetTerm State{..} = do
    hSetEcho stdin False
    hPutStr stdout $ "\ESC[?" ++ intercalate ";" (map show decset) ++ "h"
    hPutStr stdout $ "\ESC[?" ++ intercalate ";" (map show decrst) ++ "l"


winchHandler :: (Event -> IO ()) -> IO ()
winchHandler putEvent =
    Term.size >>= \case
        Just (Term.Window {Term.width = w, Term.height = h}) ->
            putEvent $ EResize w h
        Nothing ->
            return ()


run :: IO Event -> State -> IO ()
run getEvent = rec where
    rec q = rec =<< do
        t <- getCurrentTime
        let q' = render q { now = t }
        redraw q' >> getEvent >>= processEvent q'


-- TODO merge EKey and EMouse?
processEvent :: State -> Event -> IO State
processEvent q = \case
    EFlash t ->
        return q { flashMessage = t }
    EKey s ->
        keymap s q
    EMouse info ->
        mousemap info q
    EResize w h ->
        return q
            { screenWidth = w, screenHeight = h
            , flashMessage = Plain $ "resize " <> show (w,h)
            }
    ev ->
        return q
            { flashMessage = SGR [31,1] $ Plain $ "unhandled event: " <> show ev
            }


render :: State -> State
render q@State{..} =
    q { treeBuffer = newTreeBuf
      , headBuffer = newHeadBuf
      }
  where
    newTreeBuf = renderTreeView now (Z.label cursor) (Z.toTree cursor)
    newHeadBuf =
        [ Plain (show screenWidth) <> "x" <> Plain (show screenHeight)
          <> " " <> Plain (show $ linearPos cursor - yoffset)
          <> " " <> Plain (show $ topOverrun q)
          <> " " <> Plain (show $ botOverrun q)
          <> " " <> flashMessage
          <> " " <> Plain (show (xoffset, yoffset))
        ]

render0 :: State -> [Trammel String]
render0 _q@State{..} = do
    let buffer =
            map (trammelTake screenWidth . trammelDrop xoffset) $
            take screenHeight $
            headBuffer ++ drop yoffset treeBuffer
    buffer ++ take (screenHeight - length buffer) (repeat "~")


redraw :: State -> IO ()
redraw q@State{..} = do
    hPutStr stdout $ map (sub '\t' ' ') $ "\ESC[H" ++ (pp $ mintercalate "\n" $ map eraseRight $ render0 q)
    hFlush stdout
  where
    sub x x' c = if c == x then x' else c
    eraseRight s =
        if len s < screenWidth
            then s <> "\ESC[K"
            else s




keymap :: String -> State -> IO State

keymap "a" = toggleTagAtCursor "inbox"
keymap "s" = toggleTagAtCursor "unread"
keymap "&" = toggleTagAtCursor "killed"
keymap "r" = replyToAll
keymap "e" = viewSource
keymap "t" = editTags
keymap "k" = moveCursorUp 1
keymap "j" = moveCursorDown 1
keymap "K" = moveTreeDown 1
keymap "J" = moveTreeUp 1
keymap "\ESC[A" = moveCursorUp 1
keymap "\ESC[B" = moveCursorDown 1
keymap "\ESC[a" = moveTreeDown 1
keymap "\ESC[b" = moveTreeUp 1
keymap "\ESC[c" = moveTreeLeft 1  -- S-Right
keymap "\ESC[d" = moveTreeRight 1 -- S-Left
keymap "\ESC[5~" = \q -> moveTreeDown (screenHeight q `div` 2) q  -- PgUp
keymap "\ESC[6~" = \q -> moveTreeUp (screenHeight q `div` 2) q    -- PgDn
keymap "\n" = toggleFold
keymap "\DEL" = moveToParent  -- backspace

-- TODO Stuff Vim sends after exit (also there is more...)
keymap "\ESC[2;2R" = \q -> return q { flashMessage = flashMessage q <> " " <> Plain "stupid" }
keymap "\ESC[>85;95;0c" = \q -> return q { flashMessage = flashMessage q <> " " <> Plain "stupid" }

keymap s = \q ->
    return q { flashMessage = Plain $ show s }


mousemap :: MouseInfo -> State -> IO State

mousemap MouseInfo{mouseButton=1,mouseY=y} = defaultMouse1Click y
mousemap MouseInfo{mouseButton=3,mouseY=y} = \q -> defaultMouse1Click y q >>= toggleFold
mousemap MouseInfo{mouseButton=4} = moveTreeDown 3
mousemap MouseInfo{mouseButton=5} = moveTreeUp 3
mousemap MouseInfo{mouseButton=0} = return
mousemap info = \q ->
    return q { flashMessage = SGR [38,5,202] $ Plain $ show info }


defaultMouse1Click y q@State{..} = do
    let linearClickPos =
            let i = (y - length headBuffer + yoffset) - 1 {-zero-based-}
            in if 0 <= i && i < length treeBuffer
                then Just i
                else Nothing
    case linearClickPos of
        Nothing ->
            return q
                { flashMessage = Plain $ "nothing to click"
                }
        Just i ->
            return q
                { cursor = findNextN i $ Z.root cursor
                }



topOverrun :: State -> Int
topOverrun State{..} =
    max 0 (- (linearPos cursor - yoffset))


botOverrun :: State -> Int
botOverrun State{..} =
    max 0 (linearPos cursor - yoffset - (screenHeight - (length headBuffer) - 1))



moveCursorDown :: Monad m => Int -> State -> m State
moveCursorDown n q@State{..} =
    let cursor' = findNextN n cursor
        q' = q { cursor = cursor' }
    in case botOverrun q' of
        0 -> return q'
        i -> moveTreeUp i q'


moveCursorUp :: Monad m => Int -> State -> m State
moveCursorUp n q@State{..} =
    let cursor' = findPrevN n cursor
        q' = q { cursor = cursor' }
    in case topOverrun q' of
        0 -> return q'
        i -> moveTreeDown i q'


moveTreeUp :: Monad m => Int -> State -> m State
moveTreeUp n q@State{..} =
    let q' = q { yoffset = min (length treeBuffer - 1) $ max 0 (yoffset + n) }
    in case topOverrun q' of
        0 -> return q'
        i -> moveCursorDown i q'


moveTreeDown :: Monad m => Int -> State -> m State
moveTreeDown n q@State{..} =
    let q' = q { yoffset = min (length treeBuffer - 1) $ max 0 (yoffset - n) }
    in case botOverrun q' of
        0 -> return q'
        i -> moveCursorUp i q'


moveTreeLeft :: Monad m => Int -> State -> m State
moveTreeLeft n q@State{..} =
    return q { xoffset = xoffset + n }

moveTreeRight :: Monad m => Int -> State -> m State
moveTreeRight n q@State{..} =
    return q { xoffset = max 0 (xoffset - n) }


moveToParent :: Monad m => State -> m State
moveToParent q@State{..} =
    case Z.parent cursor of
        Nothing -> return q { flashMessage = "cannot go further up" }
        Just cursor' ->
            let q' = q { cursor = cursor' }
            in case topOverrun q' of
                0 -> return q'
                i -> moveTreeDown i q'


toggleFold :: State -> IO State
toggleFold q@State{..} = case Z.label cursor of
    TVMessage _ -> do
        q' <- toggleTagAtCursor "open" q

        let Just sr = findParent isTVSearchResult cursor
            TVSearchResult the_sr = Z.label sr
            Notmuch.ThreadID tid = Notmuch.searchThread the_sr

        t_ <- return . fromMessageForest =<< Notmuch.getThread tid

        let cursor' = Z.modifyTree (\(Tree.Node l _) -> Tree.Node l t_) sr
        return q' { cursor = select (==Z.label cursor) cursor' }

    TVSearchResult sr -> do
        let open = not $ null $ Tree.subForest $ Z.tree cursor
        let Notmuch.ThreadID tid = Notmuch.searchThread sr

        t_ <-
            if open
                then return []
                else return . fromMessageForest =<< Notmuch.getThread tid

        let cursor' = Z.modifyTree (\(Tree.Node l _) -> Tree.Node l t_) cursor
        return q { cursor = select (==Z.label cursor) cursor' }

    _ ->
        return q { flashMessage = "nothing happened" }
  where
    select p loc = fromMaybe (error "cannot select") $ findTree p $ Z.root loc


toggleTagAtCursor :: Tag -> State -> IO State
toggleTagAtCursor tag q@State{..} = case Z.label cursor of
    TVMessage m -> do
        -- TODO modify search result tags
        -- TODO check Notmuch.{set,unset}Tag result
        if tag `elem` Notmuch.messageTags m
            then do
                Notmuch.unsetTag (T.unpack tag) (Notmuch.unMessageID $ Notmuch.messageId m)
                let cursor' = Z.modifyTree (patchRootLabelTags [DelTag tag]) cursor
                return q { cursor = cursor' }
            else do
                Notmuch.setTag (T.unpack tag) (Notmuch.unMessageID $ Notmuch.messageId m)
                let cursor' = Z.modifyTree (patchRootLabelTags [AddTag tag]) cursor
                return q { cursor = cursor' }

    _ -> return q { flashMessage = "nothing happened" }


replyToAll :: State -> IO State
replyToAll q@State{..} = case getMessage (Z.label cursor) of
    Nothing ->
        return q { flashMessage = "no message" }
    Just m -> do
        editor <- getEnv "EDITOR"
        logname <- getEnv "LOGNAME"
        tmpdir <- getTemporaryDirectory


        let template = logname ++ "_much_draft_.mail"

        let msgId = Notmuch.unMessageID $ Notmuch.messageId m

        withTempFile tmpdir template $ \(path, draftH) -> do
            (_, _, _, procH) <-
                withFile "/dev/null" ReadMode $ \nullH ->
                    createProcess
                        (proc "notmuch" [ "reply" , "id:" ++ msgId ])
                            { std_in = UseHandle nullH
                            , std_out = UseHandle draftH
                            }
            hClose draftH
            waitForProcess procH >>= \case
                ExitFailure code ->
                    putStrLn $ "notmuch exit code = " ++ show code
                ExitSuccess ->
                    (system (editor ++ " " ++ path) <* resetTerm q) >>= \case
                        ExitFailure code ->
                            putStrLn $ editor ++ " exit code = " ++ show code
                        ExitSuccess ->
                            return ()
        return q


viewSource :: State -> IO State
viewSource q@State{..} = case getMessage (Z.label cursor) of
    Nothing ->
        return q { flashMessage = "no message" }
    Just m -> do
        editor <- getEnv "EDITOR"
        logname <- getEnv "LOGNAME"
        tmpdir <- getTemporaryDirectory

        let template = logname ++ "_much_raw_.mail"

        let msgId = Notmuch.unMessageID $ Notmuch.messageId m

        withTempFile tmpdir template $ \(path, draftH) -> do
            setFileMode path 0o400
            (_, _, _, procH) <-
                withFile "/dev/null" ReadMode $ \nullH ->
                    createProcess
                        (proc "notmuch" [ "show", "--format=raw", "id:" ++ msgId ])
                            { std_in = UseHandle nullH
                            , std_out = UseHandle draftH
                            }
            hClose draftH
            waitForProcess procH >>= \case
                ExitFailure code ->
                    putStrLn $ "notmuch exit code = " ++ show code
                ExitSuccess ->
                    (system (editor ++ " " ++ path) <* resetTerm q) >>= \case
                        ExitFailure code ->
                            putStrLn $ editor ++ " exit code = " ++ show code
                        ExitSuccess ->
                            return ()
        return q


-- TODO editTags is too convoluted
editTags :: State -> IO State
editTags q@State{..} = case Z.label cursor of
    TVSearchResult sr -> do
        edit
            (Notmuch.searchTags sr)
            ("thread:" <> (Notmuch.unThreadID $ Notmuch.searchThread sr))
            (\tagOps loc ->
                Z.modifyTree (patchTreeTags tagOps) loc
            )

    TVMessage m -> do
        edit
            (Notmuch.messageTags m)
            ("id:" <> (Notmuch.unMessageID $ Notmuch.messageId m)) -- TODO describe war besser
            (\tagOps mloc ->
                -- TODO this needs test cases
                let
                    -- patch message
                    mloc' = Z.modifyTree (patchRootLabelTags tagOps) mloc

                    -- find search result of message
                    srloc = fromMaybe (error "could not find search result of message")
                                      (findParent isTVSearchResult mloc')

                    -- patch search result
                    srloc' = Z.modifyTree (patchRootLabelTags tagOps) srloc

                in
                  -- return message
                  fromMaybe (error "could not find message again")
                            (findTree (==Z.label mloc) srloc')
                )
    _ ->
        return q { flashMessage = "cannot edit tags here" }
  where
    edit tags query patch = do
        editor <- getEnv "EDITOR"
        logname <- getEnv "LOGNAME"
        tmpdir <- getTemporaryDirectory

        let template = logname ++ "_much_.tags"

        withTempFile tmpdir template $ \(path, draftH) -> do
            hPutStr stdout "\ESC[?1049h" -- TODO geht besser
            hPutStr stdout "\ESC[?25l" -- TODO war mal besser
            setFileMode path 0o600

            -- generate draft
            T.hPutStrLn draftH $ T.intercalate " " tags
            hPutStrLn draftH $ "# " <> query

            hClose draftH
            -- TODO factorize editor
            (system (editor ++ " " ++ path) <* resetTerm q) >>= \case
                ExitFailure code -> do
                    return q { flashMessage = Plain $ editor ++ " exit code = " ++ show code }
                ExitSuccess -> do
                    -- TODO parse could fail
                    tags' <- parseTags <$> readFile path

                    case diffTags tags tags' of
                        [] ->
                            return q { flashMessage = Plain "nothing happened" } -- TODO highlight
                        tagOps -> do
                            (_, _, _, procH) <-
                                withFile "/dev/null" ReadWriteMode $ \nullH ->
                                    -- TODO batch tagging(?)
                                    -- TODO proper type for query
                                    createProcess
                                        (proc "notmuch" $ [ "tag" ] ++ tagOpsToArgs tagOps ++ [ "--", query ])
                                            { std_in = UseHandle nullH
                                            , std_out = UseHandle nullH
                                            }
                            waitForProcess procH >>= \case
                                ExitFailure code ->
                                    return q { flashMessage = Plain $ "notmuch exit code = " ++ show code }
                                ExitSuccess ->
                                    return q { cursor = select (==Z.label cursor) (patch tagOps cursor) }

    -- TODO DRY select
    select p loc =
        let root = Z.root loc
        in fromMaybe root $ findTree p root