mirror of
https://github.com/commercialhaskell/stackage-server.git
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59 lines
1.8 KiB
Haskell
59 lines
1.8 KiB
Haskell
module Handler.Download
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( getDownloadR
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, getDownloadLtsSnapshotsJsonR
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, getGhcMajorVersionR
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) where
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import Import
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import Data.Slug (SnapSlug)
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executableFor :: SupportedArch -> StackageExecutable
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executableFor Win32 = StackageWindowsExecutable
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executableFor Win64 = StackageWindowsExecutable
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executableFor _ = StackageUnixExecutable
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executableLink :: SupportedArch -> StackageExecutable -> Route App
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executableLink arch exe =
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StaticR $ StaticRoute ["setup", toPathPiece arch, toPathPiece exe] []
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downloadCandidates :: [(SupportedArch, StackageExecutable)]
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downloadCandidates =
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map (\arch -> (arch, executableFor arch))
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[minBound .. maxBound]
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getDownloadR :: Handler Html
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getDownloadR = defaultLayout $ do
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$(widgetFile "download")
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ltsMajorVersions :: Handler [Lts]
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ltsMajorVersions = liftM (map entityVal) $ runDB $ do
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mapWhileIsJustM [0..] $ \x -> do
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selectFirst [LtsMajor ==. x] [Desc LtsMinor]
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mapWhileIsJustM :: Monad m => [a] -> (a -> m (Maybe b)) -> m [b]
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mapWhileIsJustM [] _f = return []
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mapWhileIsJustM (x:xs) f = f x >>= \case
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Nothing -> return []
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Just y -> (y:) `liftM` mapWhileIsJustM xs f
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getDownloadLtsSnapshotsJsonR :: Handler Value
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getDownloadLtsSnapshotsJsonR = liftM reverse ltsMajorVersions >>= \case
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[] -> return $ object []
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majorVersions@(latest:_) -> return $ object
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$ ["lts" .= printLts latest]
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++ map toObj majorVersions
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where
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toObj lts@(Lts major _ _) =
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pack ("lts-" ++ show major) .= printLts lts
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printLts (Lts major minor _) =
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"lts-" ++ show major ++ "." ++ show minor
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-- TODO: add this to db
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ltsGhcMajorVersion :: Stackage -> Text
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ltsGhcMajorVersion _ = "7.8"
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getGhcMajorVersionR :: SnapSlug -> Handler Text
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getGhcMajorVersionR slug = do
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snapshot <- runDB $ getBy404 $ UniqueSnapshot slug
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return $ ltsGhcMajorVersion $ entityVal snapshot
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