src/Gargantext/Core/Text/Corpus/Parsers/Json2Csv.hs

   1 {-|
   2 Module      : Gargantext.Core.Text.Corpus.Parsers.Json2Csv
   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 Json parser to export towoard CSV GargV3 format.
  11 (Export from the Patent Database.)
  12
  13 -}
  14
  15 {-# LANGUAGE TemplateHaskell   #-}
  16
  17 module Gargantext.Core.Text.Corpus.Parsers.Json2Csv (json2csv, readPatents)
  18   where
  19
  20 import Prelude (read)
  21 import Data.Aeson
  22 import Data.Aeson.TH (deriveJSON)
  23 import Data.ByteString.Lazy (readFile)
  24 import Data.Text (Text, unpack)
  25 import Gargantext.Core.Utils.Prefix (unPrefix)
  26 import Gargantext.Prelude
  27 import System.IO (FilePath)
  28 import Gargantext.Core.Text.Corpus.Parsers.CSV (CsvDoc(..), writeFile, headerCsvGargV3)
  29 import Data.Vector (fromList)
  30
  31 data Patent = Patent { _patent_title :: Text
  32                      , _patent_abstract :: Text
  33                      , _patent_year     :: Text
  34                      , _patent_id       :: Text
  35  } deriving (Show)
  36
  37 $(deriveJSON (unPrefix "_patent_") ''Patent)
  38
  39 readPatents :: FilePath -> IO (Maybe [Patent])
  40 readPatents fp = decode <$> readFile fp
  41
  42 type FilePathIn  = FilePath
  43 type FilePathOut = FilePath
  44
  45 json2csv :: FilePathIn -> FilePathOut -> IO ()
  46 json2csv fin fout = do
  47   patents <- maybe (panic "json2csv error") identity <$> readPatents fin
  48   writeFile fout (headerCsvGargV3, fromList $ map patent2csvDoc patents)
  49
  50 patent2csvDoc :: Patent -> CsvDoc
  51 patent2csvDoc (Patent title abstract year _) =
  52   CsvDoc title "Source" (read (unpack year)) 1 1 abstract "Authors"
  53
  54
  55
  56
  57