module Network.Gravatar (
gravatar, gravatarWith
,Rating(..)
,Size,size
) where
import Data.Digest.OpenSSL.MD5
import Data.List
import Data.Char
import Network.URI
import qualified Data.ByteString.Char8 as S
data Rating = G | PG | R | X
deriving (Eq,Ord,Bounded,Enum,Show,Read)
newtype Size = Size Int
size :: Int -> Maybe Size
size n | n >= 1 && n <= 80 = Just (Size n)
| otherwise = Nothing
baseURL = "http://www.gravatar.com/avatar.php?"
gravatar_id = "gravatar_id"
gravatar :: String -> String
gravatar who = gravatarWith who Nothing Nothing Nothing
gravatarWith :: String
-> Maybe Rating
-> Maybe Size
-> Maybe String
-> String
gravatarWith who rating' sz' dflt'
= concat [baseURL ,gravatar_id ,"=" ,(md5sum (S.pack (clean who))),rating,sz,dflt ]
where
clean = let f = reverse . dropWhile isSpace in f . f
rating = maybe "" (\r -> "&rating="++show r) rating'
sz = maybe "" (\(Size n) -> "&size="++show n) sz'
dflt = maybe "" (\r -> "&default="++escapeURIString isUnreserved r) dflt'