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module Zettel.Parse where
import Data.Default (def)
import qualified Data.Map.Strict as Map
import qualified Data.Text as T
import System.FilePath (takeBaseName)
import Text.Pandoc.Builder (toMetaValue)
import Text.Pandoc.Chunks (Chunk (..), ChunkedDoc (..), splitIntoChunks)
import Text.Pandoc.Class (runIOorExplode)
import Text.Pandoc.Definition (Block (..), Inline (..), Meta (..), MetaValue (..), Pandoc (..))
import Text.Pandoc.Options (ReaderOptions (..), getDefaultExtensions)
import Text.Pandoc.Readers (readOrg)
import Text.Pandoc.Shared (stringify)
import Text.Pandoc.Walk (query, walk)
import Zettel.Common
import Zettel.Types
decode :: ByteString -> Text
decode = decodeUtf8
removeHeadings :: Block -> Block
removeHeadings Header {} = Plain []
removeHeadings a = a
removeDiv :: [Block] -> [Block]
removeDiv = concatMap removeDiv'
where
removeDiv' (Div _ b') = b'
removeDiv' a = [a]
queryHeaderMetaData :: [Block] -> [(Text, MetaValue)]
queryHeaderMetaData = query headingAttr
where
headingAttr (Header _ (_, _, l) i) =
map (bimap exportDate MetaString) l
<> [ ("title", MetaInlines i),
("author", MetaInlines [Str "Yann", Space, Str "Herklotz"])
]
headingAttr _ = []
exportDate s
| s == "export_date" = "date"
| otherwise = s
metaToString :: MetaValue -> Maybe Text
metaToString (MetaString t) = Just t
metaToString _ = Nothing
metaToInlines :: MetaValue -> Maybe [Inline]
metaToInlines (MetaInlines t) = Just t
metaToInlines _ = Nothing
metaToTextList :: MetaValue -> Maybe [Text]
metaToTextList (MetaList t) = traverse metaToString t
metaToTextList _ = Nothing
lookupString :: Text -> Meta -> Maybe Text
lookupString t m = Map.lookup t (unMeta m) >>= metaToString
lookupInlines :: Text -> Meta -> Maybe [Inline]
lookupInlines t m = Map.lookup t (unMeta m) >>= metaToInlines
lookupTextList :: Text -> Meta -> Maybe [Text]
lookupTextList t m = Map.lookup t (unMeta m) >>= metaToTextList
removeSpan :: [Inline] -> [Inline]
removeSpan = concatMap removeSpan'
where
removeSpan' (Span _ _) = []
removeSpan' a = [a]
removeMathNL :: Inline -> Inline
removeMathNL (Math mt t) = Math mt . fold $ T.lines t
removeMathNL a = a
separateTitleTags :: [Inline] -> ([Inline], [ZettelTag])
separateTitleTags title =
(walk removeSpan $ filter (not . isTagSpan) title, map (ZettelTag . stringify) $ filter isTagSpan title)
where
isTagSpan (Span (_, l, _) _) = "tag" `elem` l
isTagSpan _ = False
parseDate :: Text -> Maybe Text
parseDate t
| T.null t = Just t
| T.head t == '[' = viaNonEmpty head . T.words $ T.tail t
| otherwise = Just t
parseDateVal :: MetaValue -> Maybe MetaValue
parseDateVal v = MetaString <$> (metaToString v >>= parseDate)
zettelMetaFromMeta :: [ZettelTag] -> [ZettelCat] -> Meta -> ZettelMetadata
zettelMetaFromMeta t c m =
ZettelMetadata
(lookupString "date" m)
(lookupString "modified" m)
t
c
(Just "Yann Herklotz")
pandocFromChunk :: (Int, Text, Chunk) -> Pandoc
pandocFromChunk (_, t, c) =
walk removeMathNL
. walk removeDiv
. walk removeHeadings
. Pandoc
( Meta
( fromList
( ("categories", toMetaValue [t])
: ("zettelid", MetaString (chunkId c))
: headingMeta
)
)
)
$ chunkContents c
where
headingMeta = queryHeaderMetaData $ chunkContents c
zettelFromPandoc :: Pandoc -> (ZettelId, Zettel)
zettelFromPandoc p@(Pandoc attr _) =
(ZettelId ident, Zettel title (zettelMetaFromMeta tags cats attr) p cempty cempty)
where
ident = fromMaybe "" $ lookupString "zettelid" attr
title = fromMaybe [] $ lookupInlines "title" attr
tags = maybe [] (map ZettelTag) $ lookupTextList "tags" attr
cats = maybe [] (map ZettelCat) $ lookupTextList "categories" attr
updatePandocAttr :: Pandoc -> Pandoc
updatePandocAttr (Pandoc attr b) =
Pandoc
( Meta
( Map.insert
"tags"
tags
. Map.insert
"title"
(MetaInlines title')
. Map.update
parseDateVal
"modified"
. Map.update parseDateVal "date"
$ unMeta attr
)
)
b
where
tags = toMetaValue $ map unZettelTag tags'
(title', tags') = maybe ([], []) separateTitleTags $ lookupInlines "title" attr
propagateNames :: [((Int, Text), [Chunk])] -> [(Int, Text, Chunk)]
propagateNames n =
[(i, name, chunk) | ((i, name), namedChunk) <- n, chunk <- namedChunk]
parseZettelKasten :: [(Int, FilePath)] -> IO ZettelGraph
parseZettelKasten fl = do
let names = map (second (T.pack . takeBaseName)) fl
fs <- mapM (readFileBS . snd) fl
orgFiles <- mapM (runIOorExplode . readOrg (def {readerExtensions = getDefaultExtensions "org"}) . decode) fs
let splitChunks = map (splitIntoChunks "%i.md" False Nothing 15) orgFiles
let chunks = propagateNames . zip names $ map chunkedChunks splitChunks
let pandocList = map (updatePandocAttr . pandocFromChunk) chunks
return . refreshPandocMeta $ ZettelGraph (fromList $ map zettelFromPandoc pandocList) Nothing
-- parseBibliography :: FilePath -> IO [Pandoc]
|