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|
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE RecordWildCards #-}
module Much.TreeView
( module Export
, getMessage
, getSearchTerm
, isTVMessage
, isTVSearchResult
, fromSearchResults
, fromMessageForest
, fromMessageTree
, loadSubForest
, unloadSubForest
, hasUnloadedSubForest
) where
import qualified Data.ByteString.Lazy.Char8 as LBS8
import qualified Data.Text as T
import Data.Tree
import Notmuch
import Notmuch.Message
import Notmuch.SearchResult
import Much.TreeView.Types as Export
getMessage :: TreeView -> Maybe Message
getMessage = \case
TVMessage m -> Just m
TVMessageHeaderField m _ -> Just m
TVMessagePart m _ -> Just m
TVMessageQuoteLine m _ _ _ -> Just m
TVMessageLine m _ _ _ -> Just m
_ -> Nothing
getSearchTerm :: TreeView -> Maybe String
getSearchTerm = \case
TVSearch term -> Just term
_ -> Nothing
isTVMessage :: TreeView -> Bool
isTVMessage = \case
TVMessage _ -> True
_ -> False
isTVMessagePart :: TreeView -> Bool
isTVMessagePart = \case
TVMessagePart _ _ -> True
_ -> False
isTVSearchResult :: TreeView -> Bool
isTVSearchResult (TVSearchResult _) = True
isTVSearchResult _ = False
fromSearchResults :: String -> [SearchResult] -> Tree TreeView
fromSearchResults query =
Node (TVSearch query) . map (\r -> Node (TVSearchResult r) [])
fromMessageForest :: Forest Message -> Forest TreeView
fromMessageForest = map fromMessageTree
fromMessageTree :: Tree Message -> Tree TreeView
fromMessageTree (Node m ms) =
Node (TVMessage m)
(xconvHead m <> xconvBody m <> map fromMessageTree ms)
xconvHead :: Message -> Forest TreeView
xconvHead m =
map conv [ "From", "To" ]
-- TODO add Subject if it differs from thread subject
where
conv k =
Node (TVMessageHeaderField m k) []
xconvBody :: Message -> Forest TreeView
xconvBody m = map (xconvPart m) (messageBody m)
xconvPart :: Message -> MessagePart -> Tree TreeView
xconvPart m p =
Node (TVMessagePart m p) contents
where
contents = case partContent p of
ContentText t ->
zipWith (curry $ xconvLine m p) [0..] (T.lines t)
ContentRaw raw _ ->
zipWith (xconvRawLine m p) [0..] (lines . LBS8.unpack $ raw)
ContentMultipart parts ->
map (xconvPart m) parts
ContentMsgRFC822 _ ->
[]
xconvLine
:: Message -> MessagePart -> (LineNr, T.Text) -> Tree TreeView
xconvLine m p (i, s) =
Node (ctor m p i $ T.unpack s) []
where
ctor =
if isQuoteLine s
then TVMessageQuoteLine
else TVMessageLine
xconvRawLine
:: Message -> MessagePart -> LineNr -> String -> Tree TreeView
xconvRawLine m p i s =
Node (TVMessageRawLine m p i s) []
isQuoteLine :: T.Text -> Bool
isQuoteLine s0 = do
let s = T.stripStart s0
-- /^\s*>/
not (T.null s) && T.head s == '>'
--
-- Loading / Unloading
--
loadSubForest :: TreeView -> IO (Either String (Forest TreeView))
loadSubForest = \case
TVMessage m ->
Right
. unloadPartsWithFilename
. map unloadReadSubForests
. concatMap subForest
. fromMessageForest
. findFirsts messageMatch
<$> notmuchShow (termFromMessage m)
TVMessagePart m mp ->
-- TODO parse --format=raw
notmuchShowPart (termFromMessage m) (partID mp) >>= return . \case
Left e -> Left $ show e
Right mp' ->
Right
. unloadPartsWithFilename
. subForest
$ xconvPart m mp'
TVSearchResult sr ->
Right
. unloadPartsWithFilename
. map unloadReadSubForests
. fromMessageForest
<$> notmuchShow (termFromSearchResult sr)
TVSearch s ->
Right
. subForest
. fromSearchResults s
. either error id
<$> Notmuch.search [s]
_ ->
return $ Right []
where
termFromMessage = unMessageID . messageId
termFromSearchResult = unThreadID . searchThread
unloadSubForest :: Tree TreeView -> Forest TreeView
unloadSubForest t = case rootLabel t of
TVMessage _ ->
filter (isTVMessage . rootLabel) $ subForest t
TVMessagePart _ _ ->
filter (isTVMessagePart . rootLabel) $ subForest t
_ ->
[]
hasUnloadedSubForest :: Tree TreeView -> Bool
hasUnloadedSubForest t = case rootLabel t of
TVMessage _ ->
all (isTVMessage . rootLabel) $ subForest t
TVMessagePart _ _ ->
all (isTVMessagePart . rootLabel) $ subForest t
_ ->
null $ subForest t
unloadReadSubForests :: Tree TreeView -> Tree TreeView
unloadReadSubForests t = case rootLabel t of
TVMessage m | "unread" `notElem` messageTags m ->
t { subForest =
map unloadReadSubForests $
filter (isTVMessage . rootLabel) $
subForest t
}
_ ->
t { subForest =
map unloadReadSubForests $
subForest t
}
unloadPartsWithFilename :: Forest TreeView -> Forest TreeView
unloadPartsWithFilename =
map rewriteTree
where
f x@Node{..} = case rootLabel of
TVMessagePart _ mp ->
case partContentFilename mp of
Nothing -> x
Just _ ->
x { subForest = [] }
_ -> x
rewriteTree x =
let x' = f x
in x' { subForest = map rewriteTree $ subForest x' }
findFirsts :: (a -> Bool) -> Forest a -> Forest a
findFirsts p =
concatMap rec
where
rec t@Node{..} =
if p rootLabel
then [t]
else concatMap rec subForest
|
