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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE LambdaCase #-}
module TreeView
( TreeView (..)
, getMessage
, isTVSearchResult
, fromSearchResults
, fromMessageForest
, fromMessageTree
) where
import qualified Data.CaseInsensitive as CI
import qualified Data.Text as T
import Data.Monoid
import Data.Tree
import Notmuch.Message
import Notmuch.SearchResult
type LineNr = Int
data TreeView
= TVMessage Message
| TVMessageHeaderField Message (CI.CI T.Text)
| TVMessagePart Message MessagePart
| TVMessageQuoteLine Message MessagePart LineNr String
| TVMessageLine Message MessagePart LineNr String
| TVSearch String
| TVSearchResult SearchResult
deriving (Show)
instance Eq TreeView where
TVMessage m1 == TVMessage m2 =
m1 == m2
TVMessageHeaderField m1 mhf1 == TVMessageHeaderField m2 mhf2 =
m1 == m2 && mhf1 == mhf2
TVMessagePart m1 mp1 == TVMessagePart m2 mp2 =
m1 == m2 && mp1 == mp2
TVMessageLine m1 mp1 ln1 _s1 == TVMessageLine m2 mp2 ln2 _s2 =
m1 == m2 && mp1 == mp2 && ln1 == ln2
TVMessageQuoteLine m1 mp1 ln1 _s1 == TVMessageQuoteLine m2 mp2 ln2 _s2 =
m1 == m2 && mp1 == mp2 && ln1 == ln2
TVSearch s1 == TVSearch s2 =
s1 == s2
TVSearchResult s1 == TVSearchResult s2 =
s1 == s2
_ == _ = False
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
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 m' ms'
where
m' :: TreeView
m' = TVMessage m
ms' :: Forest TreeView
ms' = if isOpen m
then xconvHead m <> xconvBody m <> map fromMessageTree ms
else 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 ->
map (xconvLine m p) $ zip [0..] (T.lines t)
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
isQuoteLine :: T.Text -> Bool
isQuoteLine s0 = do
let s = T.stripStart s0
-- /^\s*>/
not (T.null s) && T.head s == '>'
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