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86 lines
3.1 KiB
Haskell
86 lines
3.1 KiB
Haskell
module Handler.Feed
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( getFeedR
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, getLtsFeedR
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, getLtsMajorFeedR
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, getNightlyFeedR
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) where
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import Import
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import Stackage.Database
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import Data.These
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import Stackage.Snapshot.Diff
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import qualified Data.HashMap.Strict as HashMap
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getFeedR :: Handler TypedContent
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getFeedR = mkFeed . snd =<< getSnapshots 20 0
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getLtsFeedR :: Handler TypedContent
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getLtsFeedR = mkFeed . snd =<< getLtsSnapshots 20 0
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getLtsMajorFeedR :: LtsMajor -> Handler TypedContent
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getLtsMajorFeedR (LtsMajor v) = mkFeed . snd =<< getLtsMajorSnapshots v 20 0
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getNightlyFeedR :: Handler TypedContent
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getNightlyFeedR = mkFeed . snd =<< getNightlySnapshots 20 0
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mkFeed :: [Entity Snapshot] -> Handler TypedContent
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mkFeed [] = notFound
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mkFeed snaps = do
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entries <- forM snaps $ \(Entity snapid snap) -> do
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content <- getContent snapid snap
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return FeedEntry
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{ feedEntryLink = SnapshotR (snapshotName snap) StackageHomeR
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, feedEntryUpdated = UTCTime (snapshotCreated snap) 0
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, feedEntryTitle = prettyName (snapshotName snap) (snapshotGhc snap)
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, feedEntryContent = content
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}
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updated <-
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case entries of
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[] -> liftIO getCurrentTime
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x:_ -> return $ feedEntryUpdated x
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newsFeed Feed
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{ feedTitle = "Recent Stackage snapshots"
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, feedLinkSelf = FeedR
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, feedLinkHome = HomeR
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, feedAuthor = "Stackage Project"
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, feedDescription = "Recent Stackage snapshots"
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, feedLanguage = "en"
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, feedUpdated = updated
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, feedEntries = entries
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}
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getContent :: SnapshotId -> Snapshot -> Handler Html
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getContent sid2 snap = do
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mprev <-
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case snapshotName snap of
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SNLts x y -> ltsBefore x y
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SNNightly day -> nightlyBefore day
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case mprev of
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Nothing -> return "No previous snapshot found for comparison"
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Just (sid1, name1) -> do
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snapDiff <- getSnapshotDiff sid1 sid2
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return
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[shamlet|
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<p>Difference between #{prettyNameShort name1} and #{prettyNameShort $ snapshotName snap}
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<table border=1 cellpadding=5>
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<thead>
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<tr>
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<th align=right>Package name
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<th align=right>Old
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<th align=left>New
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<tbody>
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$forall (name, VersionChange verChange) <- sortOn (toCaseFold . fst) $ HashMap.toList snapDiff
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<tr>
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<th align=right>#{name}
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$case verChange
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$of This oldVersion
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<td align=right>#{oldVersion}
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<td>
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$of That newVersion
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<td align=right>
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<td>#{newVersion}
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$of These oldVersion newVersion
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<td align=right>#{oldVersion}
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<td>#{newVersion}
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|]
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