content: {-# LANGUAGE ScopedTypeVariables #-}
  
  -- 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 Bilge.Retry where
  
  import Bilge.RPC (RPCException (..))
  import Control.Monad.Catch
  import Imports
  import Network.HTTP.Client (HttpException (..), HttpExceptionContent (..), responseStatus)
  import Network.HTTP.Types
  
  httpHandlers :: (Monad m) => [a -> Handler m Bool]
  httpHandlers = [const . Handler $ pure . canRetry]
  
  rpcHandlers :: (Monad m) => [a -> Handler m Bool]
  rpcHandlers =
    [ const . Handler $ \(RPCException _ _ cause) ->
        pure $ maybe False canRetry (fromException cause)
    ]
  
  canRetry :: HttpException -> Bool
  canRetry (HttpExceptionRequest _ ResponseTimeout) = True
  canRetry (HttpExceptionRequest _ ConnectionClosed) = True
  canRetry (HttpExceptionRequest _ ConnectionFailure {}) = True
  canRetry (HttpExceptionRequest _ InternalException {}) = True
  canRetry (HttpExceptionRequest _ ProxyConnectException {}) = True
  canRetry (HttpExceptionRequest _ (StatusCodeException rs _)) = statusIsServerError (responseStatus rs)
  canRetry _ = False
  