{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Amazonka.DirectoryService.DescribeSnapshots
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Obtains information about the directory snapshots that belong to this
-- account.
--
-- This operation supports pagination with the use of the /NextToken/
-- request and response parameters. If more results are available, the
-- /DescribeSnapshots.NextToken/ member contains a token that you pass in
-- the next call to DescribeSnapshots to retrieve the next set of items.
--
-- You can also specify a maximum number of return results with the /Limit/
-- parameter.
--
-- This operation returns paginated results.
module Amazonka.DirectoryService.DescribeSnapshots
  ( -- * Creating a Request
    DescribeSnapshots (..),
    newDescribeSnapshots,

    -- * Request Lenses
    describeSnapshots_directoryId,
    describeSnapshots_limit,
    describeSnapshots_nextToken,
    describeSnapshots_snapshotIds,

    -- * Destructuring the Response
    DescribeSnapshotsResponse (..),
    newDescribeSnapshotsResponse,

    -- * Response Lenses
    describeSnapshotsResponse_nextToken,
    describeSnapshotsResponse_snapshots,
    describeSnapshotsResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.DirectoryService.Types
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | Contains the inputs for the DescribeSnapshots operation.
--
-- /See:/ 'newDescribeSnapshots' smart constructor.
data DescribeSnapshots = DescribeSnapshots'
  { -- | The identifier of the directory for which to retrieve snapshot
    -- information.
    directoryId :: Prelude.Maybe Prelude.Text,
    -- | The maximum number of objects to return.
    limit :: Prelude.Maybe Prelude.Natural,
    -- | The /DescribeSnapshotsResult.NextToken/ value from a previous call to
    -- DescribeSnapshots. Pass null if this is the first call.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | A list of identifiers of the snapshots to obtain the information for. If
    -- this member is null or empty, all snapshots are returned using the
    -- /Limit/ and /NextToken/ members.
    snapshotIds :: Prelude.Maybe [Prelude.Text]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeSnapshots' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'directoryId', 'describeSnapshots_directoryId' - The identifier of the directory for which to retrieve snapshot
-- information.
--
-- 'limit', 'describeSnapshots_limit' - The maximum number of objects to return.
--
-- 'nextToken', 'describeSnapshots_nextToken' - The /DescribeSnapshotsResult.NextToken/ value from a previous call to
-- DescribeSnapshots. Pass null if this is the first call.
--
-- 'snapshotIds', 'describeSnapshots_snapshotIds' - A list of identifiers of the snapshots to obtain the information for. If
-- this member is null or empty, all snapshots are returned using the
-- /Limit/ and /NextToken/ members.
newDescribeSnapshots ::
  DescribeSnapshots
newDescribeSnapshots =
  DescribeSnapshots'
    { directoryId = Prelude.Nothing,
      limit = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      snapshotIds = Prelude.Nothing
    }

-- | The identifier of the directory for which to retrieve snapshot
-- information.
describeSnapshots_directoryId :: Lens.Lens' DescribeSnapshots (Prelude.Maybe Prelude.Text)
describeSnapshots_directoryId = Lens.lens (\DescribeSnapshots' {directoryId} -> directoryId) (\s@DescribeSnapshots' {} a -> s {directoryId = a} :: DescribeSnapshots)

-- | The maximum number of objects to return.
describeSnapshots_limit :: Lens.Lens' DescribeSnapshots (Prelude.Maybe Prelude.Natural)
describeSnapshots_limit = Lens.lens (\DescribeSnapshots' {limit} -> limit) (\s@DescribeSnapshots' {} a -> s {limit = a} :: DescribeSnapshots)

-- | The /DescribeSnapshotsResult.NextToken/ value from a previous call to
-- DescribeSnapshots. Pass null if this is the first call.
describeSnapshots_nextToken :: Lens.Lens' DescribeSnapshots (Prelude.Maybe Prelude.Text)
describeSnapshots_nextToken = Lens.lens (\DescribeSnapshots' {nextToken} -> nextToken) (\s@DescribeSnapshots' {} a -> s {nextToken = a} :: DescribeSnapshots)

-- | A list of identifiers of the snapshots to obtain the information for. If
-- this member is null or empty, all snapshots are returned using the
-- /Limit/ and /NextToken/ members.
describeSnapshots_snapshotIds :: Lens.Lens' DescribeSnapshots (Prelude.Maybe [Prelude.Text])
describeSnapshots_snapshotIds = Lens.lens (\DescribeSnapshots' {snapshotIds} -> snapshotIds) (\s@DescribeSnapshots' {} a -> s {snapshotIds = a} :: DescribeSnapshots) Prelude.. Lens.mapping Lens.coerced

instance Core.AWSPager DescribeSnapshots where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeSnapshotsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeSnapshotsResponse_snapshots
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeSnapshots_nextToken
          Lens..~ rs
          Lens.^? describeSnapshotsResponse_nextToken
          Prelude.. Lens._Just

instance Core.AWSRequest DescribeSnapshots where
  type
    AWSResponse DescribeSnapshots =
      DescribeSnapshotsResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          DescribeSnapshotsResponse'
            Prelude.<$> (x Data..?> "NextToken")
            Prelude.<*> (x Data..?> "Snapshots" Core..!@ Prelude.mempty)
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable DescribeSnapshots where
  hashWithSalt _salt DescribeSnapshots' {..} =
    _salt
      `Prelude.hashWithSalt` directoryId
      `Prelude.hashWithSalt` limit
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` snapshotIds

instance Prelude.NFData DescribeSnapshots where
  rnf DescribeSnapshots' {..} =
    Prelude.rnf directoryId
      `Prelude.seq` Prelude.rnf limit
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf snapshotIds

instance Data.ToHeaders DescribeSnapshots where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "DirectoryService_20150416.DescribeSnapshots" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON DescribeSnapshots where
  toJSON DescribeSnapshots' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("DirectoryId" Data..=) Prelude.<$> directoryId,
            ("Limit" Data..=) Prelude.<$> limit,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            ("SnapshotIds" Data..=) Prelude.<$> snapshotIds
          ]
      )

instance Data.ToPath DescribeSnapshots where
  toPath = Prelude.const "/"

instance Data.ToQuery DescribeSnapshots where
  toQuery = Prelude.const Prelude.mempty

-- | Contains the results of the DescribeSnapshots operation.
--
-- /See:/ 'newDescribeSnapshotsResponse' smart constructor.
data DescribeSnapshotsResponse = DescribeSnapshotsResponse'
  { -- | If not null, more results are available. Pass this value in the
    -- /NextToken/ member of a subsequent call to DescribeSnapshots.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The list of Snapshot objects that were retrieved.
    --
    -- It is possible that this list contains less than the number of items
    -- specified in the /Limit/ member of the request. This occurs if there are
    -- less than the requested number of items left to retrieve, or if the
    -- limitations of the operation have been exceeded.
    snapshots :: Prelude.Maybe [Snapshot],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeSnapshotsResponse' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'nextToken', 'describeSnapshotsResponse_nextToken' - If not null, more results are available. Pass this value in the
-- /NextToken/ member of a subsequent call to DescribeSnapshots.
--
-- 'snapshots', 'describeSnapshotsResponse_snapshots' - The list of Snapshot objects that were retrieved.
--
-- It is possible that this list contains less than the number of items
-- specified in the /Limit/ member of the request. This occurs if there are
-- less than the requested number of items left to retrieve, or if the
-- limitations of the operation have been exceeded.
--
-- 'httpStatus', 'describeSnapshotsResponse_httpStatus' - The response's http status code.
newDescribeSnapshotsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeSnapshotsResponse
newDescribeSnapshotsResponse pHttpStatus_ =
  DescribeSnapshotsResponse'
    { nextToken =
        Prelude.Nothing,
      snapshots = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | If not null, more results are available. Pass this value in the
-- /NextToken/ member of a subsequent call to DescribeSnapshots.
describeSnapshotsResponse_nextToken :: Lens.Lens' DescribeSnapshotsResponse (Prelude.Maybe Prelude.Text)
describeSnapshotsResponse_nextToken = Lens.lens (\DescribeSnapshotsResponse' {nextToken} -> nextToken) (\s@DescribeSnapshotsResponse' {} a -> s {nextToken = a} :: DescribeSnapshotsResponse)

-- | The list of Snapshot objects that were retrieved.
--
-- It is possible that this list contains less than the number of items
-- specified in the /Limit/ member of the request. This occurs if there are
-- less than the requested number of items left to retrieve, or if the
-- limitations of the operation have been exceeded.
describeSnapshotsResponse_snapshots :: Lens.Lens' DescribeSnapshotsResponse (Prelude.Maybe [Snapshot])
describeSnapshotsResponse_snapshots = Lens.lens (\DescribeSnapshotsResponse' {snapshots} -> snapshots) (\s@DescribeSnapshotsResponse' {} a -> s {snapshots = a} :: DescribeSnapshotsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The response's http status code.
describeSnapshotsResponse_httpStatus :: Lens.Lens' DescribeSnapshotsResponse Prelude.Int
describeSnapshotsResponse_httpStatus = Lens.lens (\DescribeSnapshotsResponse' {httpStatus} -> httpStatus) (\s@DescribeSnapshotsResponse' {} a -> s {httpStatus = a} :: DescribeSnapshotsResponse)

instance Prelude.NFData DescribeSnapshotsResponse where
  rnf DescribeSnapshotsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf snapshots
      `Prelude.seq` Prelude.rnf httpStatus