{-# language MagicHash #-}
module XML (module XML, module X) where
import Xeno.DOM as X
import Xeno.Types as X
import Data.Function as X ((&))
import Data.List as X (find)
import qualified Data.Map as Map
import Data.Map (Map, (!))
import Data.ByteString (ByteString)
import qualified Data.ByteString.Char8 as BS

class XML a where
  fromXML :: Node -> a
  toXML :: a -> String

just# :: Maybe a -> a
just# = \case Just a -> a; _ -> error "just# Nothing"
find# n x = fromXML . just# $ x & find \ a -> name a == n 
find' n x = fmap fromXML $ x & filter \ a -> name a == n 

pattern XML :: ByteString ->  Map ByteString ByteString ->  [Node] -> Node
pattern XML {xml_name, xml_attributes , xml_children}
  <- ((\n -> (name n
             , Map.fromList $ attributes n
             , children n)) -> (xml_name,xml_attributes,xml_children))

readBS :: Read a => ByteString -> a
readBS = read . BS.unpack