{-
 Copyright (C) 2013 Luke Brown <http://gsd.uwaterloo.ca>

 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 of the Software, and to permit persons to whom the Software is furnished to do
 so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-}
module Functions where

import qualified Data.List as List
import qualified Data.Map as Map
import Language.Clafer
import System.Directory

getClafers :: FilePath -> IO [(String, String)]
getClafers dir = do
					files <- getDirectoryContents dir
					let claferFiles = List.filter checkClaferExt files
					claferModels <- mapM (\x -> readFile (dir++"/"++x)) claferFiles
					return $ zip claferFiles claferModels

checkClaferExt :: String -> Bool
checkClaferExt "des.cfr" = True
checkClaferExt file' = if ((eman == "")) then False else (txe == "rfc") && (takeWhile (/='.') (tail eman) /= "esd")
	where (txe, eman) = span (/='.') (reverse file')

				
compileOneFragment :: ClaferArgs -> InputModel -> Either [ClaferErr] (Map.Map ClaferMode CompilerResult)
compileOneFragment args' model =
 	runClafer (argsWithOPTIONS args' model) $  
		do
			addModuleFragment model
			parse
			compile
			generate

compiledCheck :: Either a b -> Bool
compiledCheck (Left _) = False
compiledCheck (Right _) = True

fromLeft :: Either a b -> a
fromLeft (Left a) = a
fromLeft (Right _) = error "Function fromLeft expects argument of the form 'Left a'"

fromRight :: Either a b -> b
fromRight (Right b) = b
fromRight (Left _) = error "Function fromLeft expects argument of the form 'Right b'"

andMap :: (a -> Bool) -> [a] -> Bool
andMap f lst = and $ map f lst