58 lines
2.0 KiB
Haskell
58 lines
2.0 KiB
Haskell
{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE ViewPatterns #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE FlexibleContexts #-}
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module Yesod.Core.Class.Dispatch where
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import Yesod.Routes.Class
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import qualified Network.Wai as W
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import Yesod.Core.Types
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import Yesod.Core.Content
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import Yesod.Core.Class.Yesod
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import Yesod.Core.Class.Handler
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import Yesod.Core.Internal.Request (textQueryString)
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import Yesod.Core.Internal.Run
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import Control.Monad.Trans.Control (MonadBaseControl)
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-- | This class is automatically instantiated when you use the template haskell
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-- mkYesod function. You should never need to deal with it directly.
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class Yesod site => YesodDispatch site where
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yesodDispatch :: YesodRunnerEnv site -> W.Application
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class YesodSubDispatch sub m where
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yesodSubDispatch
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:: (m TypedContent
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-> YesodRunnerEnv (HandlerSite m)
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-> Maybe (Route (HandlerSite m))
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-> W.Application)
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-> (HandlerSite m -> sub)
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-> (Route sub -> Route (HandlerSite m))
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-> YesodRunnerEnv (HandlerSite m)
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-> W.Application
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instance YesodSubDispatch WaiSubsite master where
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yesodSubDispatch _ toSub _ YesodRunnerEnv { yreSite = site } req =
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app req
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where
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WaiSubsite app = toSub site
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-- | A helper function for creating YesodSubDispatch instances, used by the
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-- internal generated code.
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subHelper :: Monad m
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=> (HandlerT parent m TypedContent
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-> YesodRunnerEnv parent
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-> Maybe (Route parent)
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-> W.Application)
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-> (parent -> child)
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-> (Route child -> Route parent)
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-> HandlerT child (HandlerT parent m) TypedContent
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-> YesodRunnerEnv parent
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-> Maybe (Route child)
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-> W.Application
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subHelper parentRunner getSub toMaster handlert env route =
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parentRunner base env (fmap toMaster route)
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where
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base = stripHandlerT (fmap toTypedContent handlert) getSub toMaster route
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