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 AWS.Util where
  
  import Amazonka qualified as AWS
  import Data.Time
  import Imports
  
  readAuthExpiration :: AWS.Env -> IO (Maybe NominalDiffTime)
  readAuthExpiration env = do
    authEnv <-
      case runIdentity (AWS.auth env) of
        AWS.Auth authEnv -> pure authEnv
        AWS.Ref _ ref -> do
          readIORef ref
    now <- getCurrentTime
    pure $ (`diffUTCTime` now) . AWS.fromTime <$> AWS.expiration authEnv
  