src/Gargantext/Text/Parsers/RIS.hs

   1 {-|
   2 Module      : Gargantext.Text.Parsers.RIS
   3 Description :
   4 Copyright   : (c) CNRS, 2017-Present
   5 License     : AGPL + CECILL v3
   6 Maintainer  : team@gargantext.org
   7 Stability   : experimental
   8 Portability : POSIX
   9
  10
  11 RIS is a standardized tag format developed by Research Information
  12 Systems, Incorporated (the format name refers to the company) to enable
  13 citation programs to exchange data.
  14
  15 [More](https://en.wikipedia.org/wiki/RIS_(file_format))
  16
  17 -}
  18
  19 {-# LANGUAGE NoImplicitPrelude #-}
  20 {-# LANGUAGE OverloadedStrings #-}
  21
  22 module Gargantext.Text.Parsers.RIS (parser, withField, fieldWith, lines) where
  23
  24 import Data.List (lookup)
  25 import Control.Applicative
  26 import Data.Attoparsec.ByteString (Parser, try, takeTill, take, many1)
  27 import Data.Attoparsec.ByteString.Char8 (isEndOfLine)
  28 import Data.ByteString (ByteString, concat)
  29 import Data.Monoid ((<>))
  30 import Gargantext.Prelude hiding (takeWhile, take)
  31 import qualified Data.List as DL
  32 -------------------------------------------------------------
  33
  34 parser :: Parser [[(ByteString, ByteString)]]
  35 parser = do
  36     n  <- notice "TY  -"
  37     ns <- many1 (notice "\nTY  -")
  38     pure $ [n] <> ns
  39
  40 notice :: Parser ByteString -> Parser [(ByteString, ByteString)]
  41 notice s = start *> many (fieldWith field)  <* end
  42     where
  43       field :: Parser ByteString
  44       field = "\n" *> take 2 <* "  - "
  45
  46       start :: Parser ByteString
  47       start = s *> takeTill isEndOfLine
  48
  49       end :: Parser ByteString
  50       end =  "\nER  -" *> takeTill isEndOfLine
  51
  52
  53 fieldWith :: Parser ByteString -> Parser (ByteString, ByteString)
  54 fieldWith n = do
  55     name  <- n
  56     txt   <- takeTill isEndOfLine
  57     txts  <- try lines
  58     let txts' = case DL.length txts > 0 of
  59             True  -> txts
  60             False -> []
  61     pure (name, concat ([txt] <> txts'))
  62
  63
  64 lines :: Parser [ByteString]
  65 lines = many line
  66     where
  67         line :: Parser ByteString
  68         line = "\n " *> takeTill isEndOfLine
  69
  70 -------------------------------------------------------------
  71 withField :: ByteString -> (ByteString -> [(ByteString, ByteString)])
  72        -> [(ByteString, ByteString)] -> [(ByteString, ByteString)]
  73 withField k f m = m <> ( maybe [] f (lookup k m) )
  74