eidolon/Handler/RootFeed.hs

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-- eidolon -- A simple gallery in Haskell and Yesod
-- Copyright (C) 2015 Amedeo Molnár
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as published
-- by the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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module Handler.RootFeed where
import Import
import Text.Markdown
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import qualified Data.Text as T
import qualified Data.Text.Lazy as LT
import qualified Data.List as L
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import Data.Maybe
import Data.Time
import Text.Shakespeare.Text (stext)
import Yesod.Feed
import Yesod.RssFeed
import Yesod.AtomFeed
import System.FilePath
import qualified System.Posix as P
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getCommentFeedRssR :: MediumId -> Handler RepRss
getCommentFeedRssR mId = do
feed <- commentFeedBuilder mId
rssFeed feed
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getCommentFeedAtomR :: MediumId -> Handler RepAtom
getCommentFeedAtomR mId = do
feed <- commentFeedBuilder mId
atomFeed feed
commentFeedBuilder :: MediumId -> Handler (Feed (Route App))
commentFeedBuilder mId = do
medium <- runDB $ get404 mId
owner <- runDB $ getJust $ mediumOwner medium
cs <- runDB $ selectList [CommentOrigin ==. mId] [Desc CommentTime, LimitTo 100]
time <- case cs of
x:_ -> return $ commentTime $ entityVal x
[] -> liftIO getCurrentTime
es <- mapM commentToEntry cs
route <- fromJust <$> getCurrentRoute
return $ Feed
{ feedTitle = "Eidolon :: Newest Comments on " `T.append` (mediumTitle medium)
, feedLinkSelf = route
, feedLinkHome = MediumR mId
, feedAuthor = userSlug owner
, feedDescription = [shamlet|
These are the latest comments on the medium #{mediumTitle medium} by #{userSlug owner}
|]
, feedLanguage = "en"
, feedUpdated = time
, feedLogo = Just (StaticR $ StaticRoute (drop 2 $ map T.pack $ splitDirectories $ mediumThumb medium) [], LT.toStrict $ unMarkdown $ fromMaybe (Markdown "") $ mediumDescription medium)
, feedEntries = es
}
commentToEntry :: Entity Comment -> Handler (FeedEntry (Route App))
commentToEntry c = do
author <- runDB $ get $ commentAuthor $ entityVal c
let slug = fromMaybe "" $ userSlug <$> author
return FeedEntry
{ feedEntryLink = MediumR (commentOrigin $ entityVal c)
, feedEntryUpdated = (commentTime $ entityVal c)
, feedEntryTitle = LT.toStrict $ [stext|#{slug} wrote:|]
, feedEntryContent = [shamlet|#{commentContent $ entityVal c}|]
, feedEntryEnclosure = Nothing
}
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getAlbumFeedRssR :: AlbumId -> Handler RepRss
getAlbumFeedRssR aId = do
feed <- albumFeedBuilder aId
rssFeed feed
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getAlbumFeedAtomR :: AlbumId -> Handler RepAtom
getAlbumFeedAtomR aId = do
feed <- albumFeedBuilder aId
atomFeed feed
albumFeedBuilder :: AlbumId -> Handler (Feed (Route App))
albumFeedBuilder aId = do
album <- runDB $ get404 aId
owner <- runDB $ getJust $ albumOwner album
ms <- runDB $ selectList [MediumAlbum ==. aId] [Desc MediumTime, LimitTo 100]
time <- case ms of
x:_ -> return $ mediumTime $ entityVal x
[] -> liftIO getCurrentTime
es <- mapM mediumToEntry ms
route <- fromJust <$> getCurrentRoute
return Feed
{ feedTitle = "Eidolon :: Newest media in " `T.append` (albumTitle album)
, feedLinkSelf = route
, feedLinkHome = AlbumR aId
, feedAuthor = userSlug owner
, feedDescription = [shamlet|
These are the latest media uploaded in #{userSlug owner}'s album #{albumTitle album}
|]
, feedLanguage = "en"
, feedUpdated = time
, feedLogo = Just (StaticR $ StaticRoute (drop 2 $ map T.pack $ splitDirectories $ fromMaybe "/static/img/album.jpg" $ albumSamplePic album) [], "")
, feedEntries = es
}
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getNameFeedRssR :: Text -> Handler RepRss
getNameFeedRssR name = do
Entity uId _ <- runDB $ getBy404 $ UniqueUser name
getUserFeedRssR uId
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getNameFeedAtomR :: Text -> Handler RepAtom
getNameFeedAtomR name = do
Entity uId _ <- runDB $ getBy404 $ UniqueUser name
getUserFeedAtomR uId
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getUserFeedRssR :: UserId -> Handler RepRss
getUserFeedRssR uId = do
feed <- userFeedBuilder uId
rssFeed feed
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getUserFeedAtomR :: UserId -> Handler RepAtom
getUserFeedAtomR uId = do
feed <- userFeedBuilder uId
atomFeed feed
userFeedBuilder :: UserId -> Handler (Feed (Route App))
userFeedBuilder uId = do
user <- runDB $ get404 uId
ms <- runDB $ selectList [MediumOwner ==. uId] [Desc MediumTime, LimitTo 100]
time <- case ms of
x:_ -> return $ mediumTime $ entityVal x
[] -> liftIO getCurrentTime
es <- mapM mediumToEntry ms
route <- fromJust <$> getCurrentRoute
return Feed
{ feedTitle = "Eidolon :: Newest media of " `T.append` (userSlug user)
, feedLinkSelf = route
, feedLinkHome = ProfileR uId
, feedAuthor = userSlug user
, feedDescription = [shamlet|
These are the latest media uploaded by #{userSlug user} to Eidolon.
|]
, feedLanguage = "en"
, feedUpdated = time
, feedLogo = Nothing
, feedEntries = es
}
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getRootFeedRssR :: Handler RepRss
getRootFeedRssR = do
feed <- rootFeedBuilder
rssFeed feed
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getRootFeedAtomR :: Handler RepAtom
getRootFeedAtomR = do
feed <- rootFeedBuilder
atomFeed feed
rootFeedBuilder :: Handler (Feed (Route App))
rootFeedBuilder = do
ms <- runDB $ selectList [] [Desc MediumTime, LimitTo 100]
time <- case ms of
x:_ -> return $ mediumTime $ entityVal x
[] -> liftIO getCurrentTime
es <- mapM mediumToEntry ms
route <- fromJust <$> getCurrentRoute
return Feed
{ feedTitle = "Eidolon :: Latest media"
, feedLinkSelf = route
, feedLinkHome = HomeR
, feedAuthor = "Everyone"
, feedDescription = [shamlet|
These are the latest media uploaded to the Eidolon gallery service.
|]
, feedLanguage = "en"
, feedUpdated = time
, feedLogo = Nothing
, feedEntries = es
}
mediumToEntry :: MonadIO m => Entity Medium -> m (FeedEntry (Route App))
mediumToEntry ent = do
size <- liftIO $ getSize $ L.tail $ mediumPreview $ entityVal ent
return FeedEntry
{ feedEntryLink = MediumR (entityKey ent)
, feedEntryUpdated = mediumTime (entityVal ent)
, feedEntryTitle = mediumTitle (entityVal ent)
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, feedEntryContent = toHtml ((fromMaybe (Markdown "") $ mediumDescription $ entityVal ent)
`mappend` Markdown (LT.pack "\n\n")
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`mappend` Markdown (LT.pack $ show $ mediumLicence $ entityVal ent))
, feedEntryEnclosure = Just $ EntryEnclosure
(StaticR $ StaticRoute (drop 2 $ map T.pack $ splitDirectories $ mediumPreview $ entityVal ent) [])
size
"image/png"
}
getSize :: FilePath -> IO Int
getSize path = do
stat <- P.getFileStatus path
P.COff raw <- return $ P.fileSize stat
return $ (fromIntegral raw :: Int)
unMarkdown :: Markdown -> LT.Text
unMarkdown (Markdown t) = t