From 8e92e6e11d2b3b0bfb5ac9d68f347219493e6380 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kier=C3=A1n=20Meinhardt?= <kieran.meinhardt@gmail.com>
Date: Wed, 23 Sep 2020 17:44:40 +0200
Subject: split into library + executables

---
 MBox.hs | 156 ----------------------------------------------------------------
 1 file changed, 156 deletions(-)
 delete mode 100644 MBox.hs

(limited to 'MBox.hs')

diff --git a/MBox.hs b/MBox.hs
deleted file mode 100644
index 5071e48..0000000
--- a/MBox.hs
+++ /dev/null
@@ -1,156 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE RecordWildCards #-}
-module MBox
-    (
-      -- TODO don't re-export MBox but use our own Message type
-      module Export
-    , getMessageId
-    , toForest
-    ) where
-
-import qualified Data.MBox as Export
-
-import           Control.Applicative
-import qualified Data.CaseInsensitive as CI
-import qualified Data.List as List
-import           Data.Map.Strict   (Map)
-import qualified Data.Map.Strict as Map
-import           Data.Maybe
-import           Data.MBox
-import           Data.Ord
-import           Data.Set   (Set)
-import qualified Data.Set as Set
-import           Data.Text.Lazy   (Text)
-import           Data.Time
-import           Data.Tree   (Tree, Forest)
-import qualified Data.Tree as Tree
-import qualified MappedSets
-import qualified Data.Text.Lazy as Text
-import           Safe
-import           System.Locale
-import qualified Text.ParserCombinators.Parsec.Rfc2822 as P
-import qualified Text.ParserCombinators.Parsec as P
-
-
-type Ident = Text
-
-
-data IdentFields = IdentFields
-    { messageId :: Ident
-    , inReplyTo :: [Ident]
-    , references :: [Ident]
-    }
-  deriving Show
-
-
-toForest :: MBox -> Forest Message
-toForest mbox =
-    map (sortTree . fmap (\i -> fromMaybe (error "meh") $ Map.lookup i msgs)) $
-    concatMap (Tree.subForest . mkSubTree) (Set.toList $ roots refs)
-  where
-
-    mkSubTree rootLabel =
-        Tree.Node rootLabel $
-            map mkSubTree (maybe [] Set.toList $ Map.lookup rootLabel backRefs)
-
-    refs = mboxRefs mbox
-    backRefs = MappedSets.invert refs
-    msgs = unpackMBox mbox
-
-
--- TODO finde a new home for roots
-roots :: Ord a => Map a (Set a) -> Set a
-roots refs =
-    Set.unions $ Map.elems $ Map.filter p refs
-  where
-    messageIDs = Set.fromList $ Map.keys refs
-    p = Set.null . Set.intersection messageIDs
-
-
--- TODO finde a new home for sortTree
-sortTree :: Tree Message -> Tree Message
-sortTree t =
-    Tree.Node (Tree.rootLabel t) $
-        map sortTree $
-        List.sortOn (getMessageDate . Tree.rootLabel) $
-        Tree.subForest t
-
-
-getMessageDate :: Message -> Maybe UTCTime
-getMessageDate msg =
-    parseTime defaultTimeLocale rfc822DateFormat =<<
-    Text.unpack . snd <$>
-        (lastMay $
-         filter ((==CI.mk "Date") . CI.mk . Text.unpack . fst) $
-         headers msg)
-
-
-unpackMBox :: MBox -> Map Ident Message
-unpackMBox =
-    Map.fromList .
-    map (\msg -> (getMessageId $ headers msg, msg))
-
-
-getIdentFields :: Message -> IdentFields
-getIdentFields m =
-    IdentFields
-        { messageId = getMessageId hdrs
-        , inReplyTo = getInReplyTo hdrs
-        , references = getReferences hdrs
-        }
-  where
-    hdrs = headers m
-
-
--- TODO generate default Message-ID if not present
-getMessageId :: [Header] -> Ident
-getMessageId =
-    head .
-    headerMessageIds "Message-ID"
-
-
-getInReplyTo :: [Header] -> [Ident]
-getInReplyTo =
-    headerMessageIds "In-Reply-To"
-
-
-getReferences :: [Header] -> [Ident]
-getReferences =
-    headerMessageIds "References"
-
-
-headerMessageIds :: P.SourceName -> [Header] -> [Ident]
-headerMessageIds headerName =
-    concatMap (
-        either ((:[]) . Text.pack . show) id .
-        parseMsgIds headerName .
-        snd
-    ) .
-    filter ((==CI.mk headerName) . CI.mk . Text.unpack . fst)
-
-
-parseMsgIds :: P.SourceName -> Text -> Either P.ParseError [Ident]
-parseMsgIds srcName =
-    fmap (map (Text.init . Text.tail . Text.pack)) .
-    P.parse obs_in_reply_to_parser srcName .
-    Text.unpack
-  where
-    --obs_in_reply_to_parser :: CharParser a [String]
-    obs_in_reply_to_parser =
-        --filter (not . null) <$> P.many (P.phrase >> return [] <|> P.msg_id)
-        P.many1 P.msg_id
-
-
-messageRefs :: IdentFields -> [Ident]
-messageRefs IdentFields{..} =
-    if null inReplyTo
-        then maybe [""] (:[]) (lastMay references)
-        else inReplyTo
-
-
-mboxRefs :: MBox -> Map Ident (Set Ident)
-mboxRefs =
-    MappedSets.mk .
-    map (\m ->
-          let x = getIdentFields m
-          in (messageId x, messageRefs x))
-- 
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