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|
-- |
-- Copyright : (c) Sam Truzjan 2013
-- License : BSD3
-- Maintainer : pxqr.sta@gmail.com
-- Stability : experimental
-- Portability : portable
--
-- This module provides message scheme validation for core protocol
-- messages from 'Remote.KRPC.Procotol'. This module should be used
-- with 'Remote.KRPC.Protocol', otherwise (if you are using 'Remote.KRPC')
-- this module seems to be useless.
--
{-# LANGUAGE DefaultSignatures #-}
{-# LANGUAGE TypeSynonymInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE FunctionalDependencies #-}
module Network.KRPC.Scheme
( KMessage(..)
, KQueryScheme(..), methodQueryScheme
, KResponseScheme(..), methodRespScheme
) where
import Control.Applicative
import Data.BEncode.BDict as BS
import Data.BEncode.Types as BS
import Network.KRPC.Protocol
import Network.KRPC
-- | Used to validate any message by its scheme
--
-- forall m. m `validate` scheme m
--
class KMessage message scheme | message -> scheme where
-- | Get a message scheme.
scheme :: message -> scheme
-- | Check a message with a scheme.
validate :: message -> scheme -> Bool
default validate :: Eq scheme => message -> scheme -> Bool
validate = (==) . scheme
{-# INLINE validate #-}
instance KMessage KError ErrorCode where
scheme = errorCode
{-# INLINE scheme #-}
data KQueryScheme = KQueryScheme {
qscMethod :: MethodName
, qscParams :: [ParamName]
} deriving (Show, Read, Eq, Ord)
bdictKeys :: BDict -> [BKey]
bdictKeys (Cons k _ xs) = k : bdictKeys xs
bdictKeys Nil = []
instance KMessage KQuery KQueryScheme where
scheme q = KQueryScheme
{ qscMethod = queryMethod q
, qscParams = bdictKeys $ queryArgs q
}
{-# INLINE scheme #-}
methodQueryScheme :: Method a b -> KQueryScheme
methodQueryScheme = KQueryScheme <$> methodName <*> methodParams
{-# INLINE methodQueryScheme #-}
newtype KResponseScheme = KResponseScheme
{ rscVals :: [ValName]
} deriving (Show, Read, Eq, Ord)
instance KMessage KResponse KResponseScheme where
{-# SPECIALIZE instance KMessage KResponse KResponseScheme #-}
scheme = KResponseScheme . bdictKeys . respVals
{-# INLINE scheme #-}
methodRespScheme :: Method a b -> KResponseScheme
methodRespScheme = KResponseScheme . methodVals
{-# INLINE methodRespScheme #-}
|
