    {-# LANGUAGE NoImplicitPrelude #-}
    {-
    Copyright (C) 2014-2018 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    -}

    {- |
       Module      : Text.Pandoc.Readers.Org
       Copyright   : Copyright (C) 2014-2018 Albert Krewinkel
       License     : GNU GPL, version 2 or above

       Maintainer  : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>

    Conversion of org-mode formatted plain text to 'Pandoc' document.
    -}
    module Text.Pandoc.Readers.Org ( readOrg ) where

    import Prelude
    import Text.Pandoc.Readers.Org.Blocks (blockList, meta)
    import Text.Pandoc.Readers.Org.ParserState (optionsToParserState)
    import Text.Pandoc.Readers.Org.Parsing (OrgParser, readWithM)

    import Text.Pandoc.Class (PandocMonad)
    import Text.Pandoc.Definition
    import Text.Pandoc.Error
    import Text.Pandoc.Options
    import Text.Pandoc.Parsing (reportLogMessages)
    import Text.Pandoc.Shared (crFilter)

    import Control.Monad.Except (throwError)
    import Control.Monad.Reader (runReaderT)

    import Data.Text (Text)
    import qualified Data.Text as T

    -- | Parse org-mode string and return a Pandoc document.
    readOrg :: PandocMonad m
            => ReaderOptions -- ^ Reader options
            -> Text          -- ^ String to parse (assuming @'\n'@ line endings)
            -> m Pandoc
    readOrg opts s = do
      parsed <- flip runReaderT def $
                readWithM parseOrg (optionsToParserState opts)
                (T.unpack (crFilter s) ++ "\n\n")
      case parsed of
        Right result -> return result
        Left  _      -> throwError $ PandocParseError "problem parsing org"

    --
    -- Parser
    --
    parseOrg :: PandocMonad m => OrgParser m Pandoc
    parseOrg = do
      blocks' <- blockList
      meta'   <- meta
      reportLogMessages
      return $ Pandoc meta' blocks'