added tap code

src/Encoding/:w

@@ -1,76 +0,0 @@
--- This module's code leans heavily on Andy Stewarts' Morse Code implementation in Text.Morse
-module Encoding.Tap
-  ( enctap
-  , dectap
-  ) where
-
-import Data.Char (toLower, isSpace)
-import Data.Map (Map)
-import Data.List.Split (split, dropDelims, dropFinalBlank, oneOf)
-import Data.ByteString (ByteString)
-import qualified Data.Map as M
-import qualified Data.ByteString.Char8 as BC
-
--- | Morse Code convert map.
-tapCode :: Map Char String
-tapCode =
-  M.fromList
-  [('a', ". .")
-  ,('b', ". ..")
-  ,('c', ". ...")
-  ,('d', ". ....")
-  ,('e', ". .....")
-  ,('f', ".. .")
-  ,('g', ".. ..")
-  ,('h', ".. ...")
-  ,('i', ".. ....")
-  ,('j', ".. .....")
-  ,('k', ". ...")
-  ,('l', "... .")
-  ,('m', "... ..")
-  ,('n', "... ...")
-  ,('o', "... ....")
-  ,('p', "... .....")
-  ,('q', ".... .")
-  ,('r', ".... ..")
-  ,('s', ".... ...")
-  ,('t', ".... ....")
-  ,('u', ".... .....")
-  ,('v', "..... .")
-  ,('w', "..... ..")
-  ,('x', "..... ...")
-  ,('y', "..... ....")
-  ,('z', "..... .....")]
-
-enctap :: ByteString -> ByteString
-enctap = BC.pack . concatMap encodeChar . BC.unpack
-  where
-    encodeChar c
-      | isAlpha c = case M.lookup (toLower c) tapCode of
-                      Just code  -> code
-                      Nothing -> [c]
-      | isSpace c = "/"
-      | otherwise = [c]
-    -- encodeChar x = 
-      -- case findMinMatch tapCode (\k _ -> k == toLower x) of
-      --   Just (_, tap) -> tap
-      --   Nothing -> if isSpace x then "/" else ""
-
-dectap :: ByteString -> ByteString
-dectap input = BC.pack $ concatMap decodeSegment $ split (oneOf "/" ) $ BC.unpack input
-  where 
-    decodeSegment x
-      | x == "/" = " "
-      | otherwise =  concatMap decodeTap (split (dropDelims $ dropFinalBlank $ oneOf " ") x)
-
-    decodeTap lv =
-      case findMinMatch tapCode(\ _ v -> v == lv) of
-        Just (c, _) -> [c]
-        Nothing -> []
-
-findMinMatch :: Ord k => Map k a -> (k -> a -> Bool) -> Maybe (k, a)
-findMinMatch map fun = match
-  where filterMap = M.filterWithKey fun map
-        match = if M.null filterMap
-                   then Nothing
-                   else Just $ M.findMin filterMap