-- 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/>.
{-# OPTIONS_GHC -fplugin=Polysemy.Plugin #-}

module Wire.Sem.Now.IO
  ( nowToIOAction,
    nowToIO,
  )
where

import Data.Time
import Imports
import Polysemy
import Wire.Sem.Now

-- | An interpreter of the 'Now' effect to IO via a custom IO action that
-- provides the current time.
nowToIOAction ::
  forall r a.
  (Member (Embed IO) r) =>
  IO UTCTime ->
  Sem (Now ': r) a ->
  Sem r a
nowToIOAction :: forall (r :: EffectRow) a.
Member (Embed IO) r =>
IO UTCTime -> Sem (Now : r) a -> Sem r a
nowToIOAction IO UTCTime
ioTime = (forall (rInitial :: EffectRow) x. Now (Sem rInitial) x -> Sem r x)
-> Sem (Now : r) a -> Sem r a
forall (e :: (* -> *) -> * -> *) (r :: EffectRow) a.
FirstOrder e "interpret" =>
(forall (rInitial :: EffectRow) x. e (Sem rInitial) x -> Sem r x)
-> Sem (e : r) a -> Sem r a
interpret ((forall (rInitial :: EffectRow) x.
  Now (Sem rInitial) x -> Sem r x)
 -> Sem (Now : r) a -> Sem r a)
-> (forall (rInitial :: EffectRow) x.
    Now (Sem rInitial) x -> Sem r x)
-> Sem (Now : r) a
-> Sem r a
forall a b. (a -> b) -> a -> b
$ \case Now (Sem rInitial) x
Get -> forall (m :: * -> *) (r :: EffectRow) a.
Member (Embed m) r =>
m a -> Sem r a
embed @IO IO x
IO UTCTime
ioTime

-- | A specialisation of 'nowToIOAction' to the 'getCurrentTime' IO action.
nowToIO ::
  forall r a.
  (Member (Embed IO) r) =>
  Sem (Now ': r) a ->
  Sem r a
nowToIO :: forall (r :: EffectRow) a.
Member (Embed IO) r =>
Sem (Now : r) a -> Sem r a
nowToIO = IO UTCTime -> Sem (Now : r) a -> Sem r a
forall (r :: EffectRow) a.
Member (Embed IO) r =>
IO UTCTime -> Sem (Now : r) a -> Sem r a
nowToIOAction IO UTCTime
getCurrentTime