content: -- This file is part of the Wire Server implementation.
  --
  -- Copyright (C) 2022 Wire Swiss GmbH <opensource@wire.com>
  --
  -- 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 <https://www.gnu.org/licenses/>.
  
  module Common where
  
  import Cassandra
  import Conduit
  import Data.Aeson
  import Data.ByteString.Lazy qualified as LBS
  import Data.Conduit.Combinators qualified as C
  import Imports
  import System.IO
  
  sourceJsonLines :: (MonadIO m, FromJSON c) => Handle -> ConduitM a c m ()
  sourceJsonLines handle =
    C.sourceHandle handle
      .| C.linesUnboundedAscii
      .| mapC (either error id . eitherDecodeStrict)
  
  sinkJsonLines :: (ToJSON a) => Handle -> ConduitT [a] Void IO ()
  sinkJsonLines hd = C.mapM_ (mapM_ (LBS.hPutStr hd . (<> "\n") . encode))
  
  -- FUTUREWORK: this is very slow. Look for alterantives. Maybe `batch` queries are faster.
  sinkTableRows :: (Tuple a) => PrepQuery W a () -> ConduitM a Void Client ()
  sinkTableRows insertQuery = go
    where
      go = do
        mbTuple <- await
        case mbTuple of
          Nothing -> pure ()
          Just tuple -> do
            lift $ write insertQuery (params LocalQuorum tuple)
            go
  