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{- |
Module      :  Text.Pandoc.Readers.Plain
Maintainer  :  defanor <defanor@uberspace.net>
Stability   :  unstable
Portability :  portable
-}

{-# LANGUAGE OverloadedStrings #-}
module Text.Pandoc.Readers.Plain ( readPlain
                                 , lineToInlines
                                 ) where

import Text.Pandoc.Definition
import Text.Pandoc.Class
import qualified Data.Text as T


-- | Translates a text line into a list of 'Inline' elements suitable
-- for further processing.
lineToInlines :: String -> [Inline]
lineToInlines [] = []
lineToInlines (' ':rest) = Space : lineToInlines rest
lineToInlines s = let (cur, next) = break (== ' ') s
                  in Str cur : lineToInlines next

-- | Reads plain text, always succeeding and producing a single
-- 'Plain' block.
readPlain :: PandocMonad m => T.Text -> m Pandoc
readPlain = pure . Pandoc mempty . pure . Plain .
  concatMap (\l -> (lineToInlines $ T.unpack l) ++ [LineBreak])
  . T.lines . T.filter (/= '\r')