-- | The @preferences@ element of a OSM file.
module Data.Geo.OSM.Preferences(
                                 Preferences,
                                 preferences
                               ) where

import Text.XML.HXT.Arrow
import Text.XML.HXT.Extras
import Data.Geo.OSM.Tag
import Data.Geo.OSM.Accessor.Tags

-- | The @preferences@ element of a OSM file.
newtype Preferences = Preferences [Tag]
  deriving Eq

-- | Constructs a @preferences@ with tags.
preferences :: [Tag] -- ^ The list of tags (@tag@ elements).
               -> Preferences
preferences = Preferences

instance XmlPickler Preferences where
  xpickle = xpElem "preferences" (xpWrap (preferences, \(Preferences r) -> r) (xpList xpickle))

instance Show Preferences where
  show = showPickled []

instance Tags Preferences where
  tags (Preferences x) = x
  setTags a (Preferences _) = preferences a