{- |

Module : ./OWL2/Translate.hs

Description : translate string to OWL2 valid names

Copyright : (c) C. Maeder, DFKI GmbH 2012

License : GPLv2 or higher, see LICENSE.txt

Maintainer : Christian.Maeder@dfki.de

Stability : provisional

Portability : portable

-}

module OWL2.Translate where

import Common.IRI

import Common.Id

import Common.ProofUtils

import Data.Char

import OWL2.Parse

-- now provided in Common.IRI

--idToIRI :: Id -> IRI

--idToIRI = idToAnonIRI False

idToAnonIRI :: Bool -> Id -> IRI

idToAnonIRI = idToAnonNumberedIRI (-1)

idToNumberedIRI :: Id -> Int -> IRI

idToNumberedIRI i n = idToAnonNumberedIRI n False i

idToAnonNumberedIRI :: Int -> Bool -> Id -> IRI

idToAnonNumberedIRI n b i = nullIRI

{ iriPath = stringToId ((if b then ('_' :) else id) $ transString (show i)

++ if n < 0 then "" else '_' : show n)

, iriPos = rangeOfId i

, isAbbrev = True }

-- | translate to a valid OWL string

transString :: String -> String

transString str = let

x = 'x'

replaceChar1 d | d == x = [x, x] -- code out existing x!

| iunreserved d = [d]

| otherwise = x : replaceChar d

in case str of

"" -> [x]

c : s -> let l = replaceChar1 c in

(if isDigit c || c == '_' then [x, c]

else l) ++ concatMap replaceChar1 s

-- | injective replacement of special characters

replaceChar :: Char -> String

-- <http://www.htmlhelp.com/reference/charset/>

replaceChar c = if isAlphaNum c then [c] else lookupCharMap c