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/>.
  
  -- | Working with remote queues (like Amazon SQS).
  module Brig.Queue
    ( module Brig.Queue.Types,
      listen,
    )
  where
  
  import Brig.AWS qualified as AWS
  import Brig.DeleteQueue.Interpreter (QueueEnv (..))
  import Brig.Queue.Stomp qualified as Stomp
  import Brig.Queue.Types
  import Control.Monad.Catch
  import Data.Aeson
  import Imports
  import System.Logger.Class as Log hiding (settings)
  
  -- | Forever listen to messages coming from a queue and execute a callback
  -- for each incoming message.
  --
  -- See documentation of underlying functions (e.g. 'Stomp.listen') for
  -- extra details.
  listen ::
    ( Show a,
      FromJSON a,
      MonadLogger m,
      MonadMask m,
      MonadUnliftIO m
    ) =>
    QueueEnv ->
    (a -> m ()) ->
    m ()
  listen (StompQueueEnv env queue) callback =
    Stomp.listen env queue callback
  listen (SqsQueueEnv env throttleMillis queue) callback = do
    withRunInIO $ \lower -> AWS.execute env $ AWS.listen throttleMillis queue $ lower . callback
  