{-# OPTIONS_GHC -fno-warn-orphans #-}
-----------------------------------------------------------------------------
-- |
-- Module      :  Lentil.File
-- Copyright   :  © 2015 Francesco Ariis
-- License     :  GPLv3 (see the LICENSE file)
--
-- File operations
-----------------------------------------------------------------------------

module Lentil.File where

import Lentil.Types
import Lentil.Parse.Issue

import System.FilePath
import System.FilePath.Find
import Data.Monoid
import Control.Applicative

import qualified Data.List as L



---------------
-- INSTANCES --
---------------

instance Monoid a => Monoid (FindClause a) where
    mempty = pure mempty
    mappend = liftA2 mappend


--------------
-- FILESCAN --
--------------

findIssues :: [FilePath] -> [FilePath] -> IO [Issue]
findIssues is xs = find always (findClause is xs) "." >>= issueFinder

-- fp to include, fp to exclude, clause
findClause :: [FilePath] -> [FilePath] -> FindClause Bool
findClause i x = let ic     = mconcat $ map fp2fc i
                     xc     = mconcat $ map fp2fc x
                 in fmap getAny ic &&? (not <$> fmap getAny xc)
    where
          fp2fc :: FilePath -> FindClause Any
          fp2fc f = Any . L.isPrefixOf (combine "." f) <$> filePath
          -- TODO: combine funziona su windows? [feature:intermediate]