{-# LANGUAGE OverloadedStrings #-}

module Data.SMTP.Parser.URI (parseURI) where

import Data.Attoparsec.ByteString.Char8
import qualified Data.Attoparsec.ByteString.Char8 as A
import Data.SMTP.Types.URI
import Data.SMTP.Account
import Control.Applicative ((<|>))
import qualified Data.Char as C
import Text.StringConvert

parseURI :: Parser URI
parseURI = do
  stringCI "fCMTP://"
  a <- parseAccount
  p <- parsePath
  (do
      stringCI "#"
      rev <- parseRevision
      return $ URI a p (Just rev)
    ) <|> return (URI a p Nothing)

parsePath :: Parser Path
parsePath = (Path . s) <$> A.takeWhile isPathChar
  where
    isPathChar :: Char -> Bool
    isPathChar c = C.isAlphaNum c || elem c ("_-=[]{}().:%/" :: String)

parseRevision :: Parser Revision
parseRevision = (Revision . s) <$> A.takeWhile isRevisionChar
  where
    isRevisionChar :: Char -> Bool
    isRevisionChar c = C.isAlphaNum c || elem c ("+-/_=." :: String)