ebook-manager/src/API/Books.hs

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Haskell
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2018-08-05 23:42:37 +03:00
{-# Language DataKinds #-}
{-# Language TypeFamilies #-}
{-# Language TypeOperators #-}
{-# Language NoImplicitPrelude #-}
{-# Language MultiParamTypeClasses #-}
{-# Language OverloadedStrings #-}
{-# Language TemplateHaskell #-}
{-# Language QuasiQuotes #-}
{-# Language RecordWildCards #-}
{-# Language DeriveGeneric #-}
{-# Language FlexibleInstances #-}
{-# Language TypeApplications #-}
{-# Language DataKinds #-}
module API.Books where
import Servant hiding (contentType)
import Types
import ClassyPrelude
import Server.Auth
import Servant.Auth as SA
import Data.Aeson
import API.Channels (JsonChannel(..))
import Database.Book
import Database.Channel
import Database
import Control.Lens
import Data.Generics.Product
data JsonBook = JsonBook { contentType :: Text
, title :: Maybe Text
, description :: Maybe Text
, channels :: [JsonChannel] }
deriving (Generic, Show)
instance ToJSON JsonBook
instance FromJSON JsonBook
type API = Auth '[SA.BasicAuth, SA.JWT] SafeUser :> BaseAPI
type BaseAPI = "books" :> Get '[JSON] [JsonBook]
handler :: ServerT API AppM
handler user = listBooksHandler user
listBooksHandler :: AuthResult SafeUser -> AppM [JsonBook]
listBooksHandler = requireLoggedIn $ \user -> do
runDB (usersBooks (view (field @"username") user) >>= mapM augment)
where
augment Book{..} = do
channels <- fmap (\Channel{..} -> JsonChannel{..}) <$> booksChannels contentHash
pure JsonBook{..}