X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=Rakka%2FSystemConfig.hs;h=eb526fbc45939a6863d2fc139fd2a45876f8138c;hb=9ff4eb243ae1545c62a5ab2eaf8dcb2f7c40b20d;hp=ea7e370cfe7aa8d31edb9b643d1e0d40ae01e59f;hpb=885faf1cabc3f79c90e1885268e2a9138b1ddefb;p=Rakka.git diff --git a/Rakka/SystemConfig.hs b/Rakka/SystemConfig.hs index ea7e370..eb526fb 100644 --- a/Rakka/SystemConfig.hs +++ b/Rakka/SystemConfig.hs @@ -6,82 +6,206 @@ module Rakka.SystemConfig , getSysConf , getSysConfA + + , SiteName(..) + , BaseURI(..) + , DefaultPage(..) + , StyleSheet(..) + , Languages(..) + + , serializeStringPairs + , deserializeStringPairs ) where +import Codec.Binary.UTF8.String import Control.Arrow.ArrowIO +import Control.Concurrent.STM +import Control.Monad import Control.Monad.Trans import qualified Data.ByteString.Char8 as C8 +import qualified Data.ByteString.Lazy as L +import Data.Dynamic +import Data.Map (Map) +import qualified Data.Map as M import Data.Maybe +import GHC.Conc (unsafeIOToSTM) import Network import qualified Network.HTTP.Lucu.Config as LC -import Network.URI - - -data SystemConfig = SystemConfig { - scLucuConf :: !LC.Config - } - - -data SysConfValue - = SiteName String - | BaseURI URI - | StyleSheet String - - -mkSystemConfig :: LC.Config -> SystemConfig -mkSystemConfig = SystemConfig - +import Network.HTTP.Lucu.Utils +import Network.URI hiding (path) +import Rakka.Page +import Rakka.Utils +import Subversion.FileSystem +import Subversion.FileSystem.Revision +import Subversion.FileSystem.Root +import Subversion.Repository +import System.FilePath.Posix +import System.Log.Logger -getSysConf :: MonadIO m => SystemConfig -> SysConfValue -> m SysConfValue -getSysConf sc key - = liftIO $ sysConfDefault sc key -- FIXME +logger :: String +logger = "Rakka.SystemConfig" -getSysConfA :: ArrowIO a => SystemConfig -> SysConfValue -> a b SysConfValue -getSysConfA = (arrIO0 .) . getSysConf - -{- paths -} -sysConfPath :: SysConfValue -> FilePath -sysConfPath (SiteName _) = "/siteName" -sysConfPath (BaseURI _) = "/baseURI" -sysConfPath (StyleSheet _) = "/styleSheet" - - -{- marshalling -} -marshalSysConf :: SysConfValue -> String -marshalSysConf (SiteName name) = name -marshalSysConf (BaseURI uri ) = uriToString id uri "" -marshalSysConf (StyleSheet name) = name - - -{- unmarshalling -} -unmarshalSysConf :: SysConfValue -> String -> SysConfValue -unmarshalSysConf (SiteName _) name = SiteName name -unmarshalSysConf (BaseURI _) uri = BaseURI $ fromJust $ parseURI uri -unmarshalSysConf (StyleSheet _) name = StyleSheet name +data SystemConfig = SystemConfig { + scLucuConf :: !LC.Config + , scRepository :: !Repository + , scCache :: !(TVar (Map FilePath Dynamic)) + } -{- getting default value -} -sysConfDefault :: SystemConfig -> SysConfValue -> IO SysConfValue +class (Typeable a, Show a) => SysConfValue a where + confPath :: a -> FilePath + serialize :: a -> String + deserialize :: String -> Maybe a + defaultValue :: SystemConfig -> a + + +mkSystemConfig :: LC.Config -> Repository -> IO SystemConfig +mkSystemConfig lc repos + = do cache <- newTVarIO M.empty + return $ SystemConfig { + scLucuConf = lc + , scRepository = repos + , scCache = cache + } + +getSysConf :: forall m a. (MonadIO m, SysConfValue a) => SystemConfig -> m a +getSysConf sc + = liftIO $ + atomically $ + do let path = confPath (undefined :: a) + + cache <- readTVar (scCache sc) + + case M.lookup path cache of + Just val -> return $ fromJust $ fromDynamic val + Nothing -> do val <- unsafeIOToSTM (getSysConf' sc) + writeTVar (scCache sc) (M.insert path (toDyn val) cache) + return val + + +getSysConf' :: forall a. SysConfValue a => SystemConfig -> IO a +getSysConf' sc + = do let path = fromConfPath $ confPath (undefined :: a) + + fs <- getRepositoryFS (scRepository sc) + rev <- getYoungestRev fs + value <- withRevision fs rev + $ do exists <- isFile path + case exists of + True + -> do str <- getFileContentsLBS path + return $ Just $ chomp $ decode $ L.unpack str + False + -> return Nothing + + case value of + Just str + -> case deserialize str of + Just val + -> do debugM logger ("Got a config value at `" ++ path ++ "': " ++ show val) + return val + Nothing + -> fail ("Got an invalid config value at `" ++ path ++ "': " ++ str) + Nothing + -> do let val = defaultValue sc + debugM logger ("Got no config value at `" ++ path ++ "'. Defaulting to " ++ show val) + return val + + +getSysConfA :: (ArrowIO a, SysConfValue c) => SystemConfig -> a b c +getSysConfA = arrIO0 . getSysConf + + +fromConfPath :: FilePath -> FilePath +fromConfPath = ("/config" ) + + +serializeStringPairs :: [(String, String)] -> String +serializeStringPairs = joinWith "\n" . map serializePair' + where + serializePair' :: (String, String) -> String + serializePair' (a, b) = a ++ " " ++ b -sysConfDefault _ (SiteName _) - = return $ SiteName "Rakka" -sysConfDefault sc (BaseURI _) - = do let conf = scLucuConf sc - host = C8.unpack $ LC.cnfServerHost conf - port = case LC.cnfServerPort conf of - PortNumber num -> fromIntegral num - - defaultURI - = "http://" ++ host ++ +deserializeStringPairs :: String -> Maybe [(String, String)] +deserializeStringPairs = sequence . map deserializePair' . lines + where + deserializePair' :: String -> Maybe (String, String) + deserializePair' s = case break (/= ' ') s of + (a, ' ':b) -> Just (a, b) + _ -> Nothing + + + +{- config values -} + +newtype SiteName = SiteName String deriving (Show, Typeable) +instance SysConfValue SiteName where + confPath _ = "siteName" + serialize (SiteName name) = name + deserialize name = Just (SiteName name) + defaultValue _ = SiteName "Rakka" + + +newtype BaseURI = BaseURI URI deriving (Show, Typeable) +instance SysConfValue BaseURI where + confPath _ = "baseURI" + serialize (BaseURI uri) = uriToString id uri "" + deserialize uri = fmap BaseURI + $ do parsed <- parseURI uri + when (uriPath parsed == "" ) (fail undefined) + when (last (uriPath parsed) /= '/') (fail undefined) + when (uriQuery parsed /= "" ) (fail undefined) + when (uriFragment parsed /= "" ) (fail undefined) + return parsed + defaultValue sc + = let conf = scLucuConf sc + host = C8.unpack $ LC.cnfServerHost conf + port = case LC.cnfServerPort conf of + PortNumber num -> fromIntegral num :: Int + _ -> undefined + defaultURI + = "http://" ++ host ++ -- FIXME: consider IPv6 address (if port == 80 then "" else ':' : show port) ++ "/" - - return $ BaseURI $ fromJust $ parseURI defaultURI - -sysConfDefault _ (StyleSheet _) - = return $ StyleSheet "StyleSheet/Default" + in + BaseURI $ fromJust $ parseURI defaultURI + + +newtype DefaultPage = DefaultPage String deriving (Show, Typeable) +instance SysConfValue DefaultPage where + confPath _ = "defaultPage" + serialize (DefaultPage name) = name + deserialize name = Just (DefaultPage name) + defaultValue _ = DefaultPage "MainPage" + + +newtype StyleSheet = StyleSheet String deriving (Show, Typeable) +instance SysConfValue StyleSheet where + confPath _ = "styleSheet" + serialize (StyleSheet name) = name + deserialize name = Just (StyleSheet name) + defaultValue _ = StyleSheet "StyleSheet/Default" + + +newtype Languages = Languages (Map LanguageTag LanguageName) deriving (Show, Typeable) +instance SysConfValue Languages where + confPath _ = "languages" + serialize (Languages langs) = serializeStringPairs (M.toList langs) + deserialize langs = fmap (Languages . M.fromList) (deserializeStringPairs langs) + defaultValue _ + = Languages $ M.fromList [ ("en", "English" ) + , ("es", "Español" ) + , ("de", "Deutsch" ) + , ("fi", "Suomi" ) + , ("fr", "Français" ) + , ("ga", "Gaeilge" ) + , ("gd", "Gàidhlig" ) + , ("ja", "日本語" ) + , ("pt", "Português") + , ("sv", "Svenska" ) + ]