-- 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 Galley.API.MLS.Enabled where

import Control.Lens (view)
import Galley.Env
import Imports hiding (getFirst)
import Polysemy
import Polysemy.Input
import Wire.API.Error
import Wire.API.Error.Galley
import Wire.API.MLS.Keys

isMLSEnabled :: (Member (Input Env) r) => Sem r Bool
isMLSEnabled :: forall (r :: EffectRow). Member (Input Env) r => Sem r Bool
isMLSEnabled = (Env -> Bool) -> Sem r Bool
forall i j (r :: EffectRow).
Member (Input i) r =>
(i -> j) -> Sem r j
inputs (Maybe (MLSKeysByPurpose MLSPrivateKeys) -> Bool
forall a. Maybe a -> Bool
isJust (Maybe (MLSKeysByPurpose MLSPrivateKeys) -> Bool)
-> (Env -> Maybe (MLSKeysByPurpose MLSPrivateKeys)) -> Env -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Getting
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
  Env
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
-> Env -> Maybe (MLSKeysByPurpose MLSPrivateKeys)
forall s (m :: * -> *) a. MonadReader s m => Getting a s a -> m a
view Getting
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
  Env
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
Lens' Env (Maybe (MLSKeysByPurpose MLSPrivateKeys))
mlsKeys)

-- | Fail if MLS is not enabled. Only use this function at the beginning of an
-- MLS endpoint, NOT in utility functions.
assertMLSEnabled ::
  ( Member (Input Env) r,
    Member (ErrorS 'MLSNotEnabled) r
  ) =>
  Sem r ()
assertMLSEnabled :: forall (r :: EffectRow).
(Member (Input Env) r, Member (ErrorS 'MLSNotEnabled) r) =>
Sem r ()
assertMLSEnabled = Sem r (MLSKeysByPurpose MLSPrivateKeys) -> Sem r ()
forall (f :: * -> *) a. Functor f => f a -> f ()
void Sem r (MLSKeysByPurpose MLSPrivateKeys)
forall (r :: EffectRow).
(Member (Input Env) r, Member (ErrorS 'MLSNotEnabled) r) =>
Sem r (MLSKeysByPurpose MLSPrivateKeys)
getMLSPrivateKeys

getMLSPrivateKeys ::
  ( Member (Input Env) r,
    Member (ErrorS 'MLSNotEnabled) r
  ) =>
  Sem r (MLSKeysByPurpose MLSPrivateKeys)
getMLSPrivateKeys :: forall (r :: EffectRow).
(Member (Input Env) r, Member (ErrorS 'MLSNotEnabled) r) =>
Sem r (MLSKeysByPurpose MLSPrivateKeys)
getMLSPrivateKeys = forall {k} (e :: k) (r :: EffectRow) a.
Member (ErrorS e) r =>
Maybe a -> Sem r a
forall (e :: GalleyError) (r :: EffectRow) a.
Member (ErrorS e) r =>
Maybe a -> Sem r a
noteS @'MLSNotEnabled (Maybe (MLSKeysByPurpose MLSPrivateKeys)
 -> Sem r (MLSKeysByPurpose MLSPrivateKeys))
-> Sem r (Maybe (MLSKeysByPurpose MLSPrivateKeys))
-> Sem r (MLSKeysByPurpose MLSPrivateKeys)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< (Env -> Maybe (MLSKeysByPurpose MLSPrivateKeys))
-> Sem r (Maybe (MLSKeysByPurpose MLSPrivateKeys))
forall i j (r :: EffectRow).
Member (Input i) r =>
(i -> j) -> Sem r j
inputs (Getting
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
  Env
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
-> Env -> Maybe (MLSKeysByPurpose MLSPrivateKeys)
forall s (m :: * -> *) a. MonadReader s m => Getting a s a -> m a
view Getting
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
  Env
  (Maybe (MLSKeysByPurpose MLSPrivateKeys))
Lens' Env (Maybe (MLSKeysByPurpose MLSPrivateKeys))
mlsKeys)