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{-
Copyright (C) 2006-2017 John MacFarlane <jgm@berkeley.edu>
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
-}
{-# LANGUAGE TemplateHaskell #-}
{- |
Module : Text.Pandoc.Filter
Copyright : Copyright (C) 2006-2017 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley@edu>
Stability : alpha
Portability : portable
Programmatically modifications of pandoc documents.
-}
module Text.Pandoc.Filter
( Filter (..)
, applyFilters
) where
import Data.Aeson (defaultOptions)
import Data.Aeson.TH (deriveJSON)
import Data.Foldable (foldrM)
import Text.Pandoc.Class (PandocIO)
import Text.Pandoc.Definition (Pandoc)
import Text.Pandoc.Options (ReaderOptions)
import qualified Text.Pandoc.Filter.JSON as JSONFilter
import qualified Text.Pandoc.Filter.Lua as LuaFilter
data Filter = LuaFilter FilePath
| JSONFilter FilePath
deriving (Show)
applyFilters :: ReaderOptions
-> [Filter]
-> [String]
-> Pandoc
-> PandocIO Pandoc
applyFilters ropts filters args d = do
foldrM ($) d $ map applyFilter filters
where
applyFilter (JSONFilter f) = JSONFilter.apply ropts args f
applyFilter (LuaFilter f) = LuaFilter.apply ropts args f
$(deriveJSON defaultOptions ''Filter)
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