eidolon/Handler/Tag.hs

--  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
--  along with this program.  If not, see <http://www.gnu.org/licenses/>.

module Handler.Tag where

import Import
import qualified Data.Text as T
import Data.Maybe (catMaybes)
import System.FilePath

getTagR :: Text -> Handler Html
getTagR tag = do
  media <- runDB $ do
    almostMedia <- selectList [] [Asc MediumTitle]
    ret <- catMaybes <$> mapM (\a ->
      if tag `elem` mediumTags (entityVal a)
        then return (Just a)
        else return Nothing
        ) almostMedia
    return ret
  defaultLayout $ do
    setTitle $ toHtml ("Eidolon :: Tag " `T.append` tag)
    $(widgetFile "tagMedia")