{-# 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.DataBrew.ListDatasets
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Lists all of the DataBrew datasets.
--
-- This operation returns paginated results.
module Amazonka.DataBrew.ListDatasets
  ( -- * Creating a Request
    ListDatasets (..),
    newListDatasets,

    -- * Request Lenses
    listDatasets_maxResults,
    listDatasets_nextToken,

    -- * Destructuring the Response
    ListDatasetsResponse (..),
    newListDatasetsResponse,

    -- * Response Lenses
    listDatasetsResponse_nextToken,
    listDatasetsResponse_httpStatus,
    listDatasetsResponse_datasets,
  )
where

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

-- | /See:/ 'newListDatasets' smart constructor.
data ListDatasets = ListDatasets'
  { -- | The maximum number of results to return in this request.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token returned by a previous call to retrieve the next set of
    -- results.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListDatasets' 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:
--
-- 'maxResults', 'listDatasets_maxResults' - The maximum number of results to return in this request.
--
-- 'nextToken', 'listDatasets_nextToken' - The token returned by a previous call to retrieve the next set of
-- results.
newListDatasets ::
  ListDatasets
newListDatasets =
  ListDatasets'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of results to return in this request.
listDatasets_maxResults :: Lens.Lens' ListDatasets (Prelude.Maybe Prelude.Natural)
listDatasets_maxResults = Lens.lens (\ListDatasets' {maxResults} -> maxResults) (\s@ListDatasets' {} a -> s {maxResults = a} :: ListDatasets)

-- | The token returned by a previous call to retrieve the next set of
-- results.
listDatasets_nextToken :: Lens.Lens' ListDatasets (Prelude.Maybe Prelude.Text)
listDatasets_nextToken = Lens.lens (\ListDatasets' {nextToken} -> nextToken) (\s@ListDatasets' {} a -> s {nextToken = a} :: ListDatasets)

instance Core.AWSPager ListDatasets where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listDatasetsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        (rs Lens.^. listDatasetsResponse_datasets) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listDatasets_nextToken
          Lens..~ rs
          Lens.^? listDatasetsResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable ListDatasets where
  hashWithSalt _salt ListDatasets' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken

instance Prelude.NFData ListDatasets where
  rnf ListDatasets' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken

instance Data.ToHeaders ListDatasets where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToPath ListDatasets where
  toPath = Prelude.const "/datasets"

instance Data.ToQuery ListDatasets where
  toQuery ListDatasets' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "nextToken" Data.=: nextToken
      ]

-- | /See:/ 'newListDatasetsResponse' smart constructor.
data ListDatasetsResponse = ListDatasetsResponse'
  { -- | A token that you can use in a subsequent call to retrieve the next set
    -- of results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | A list of datasets that are defined.
    datasets :: [Dataset]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListDatasetsResponse' 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', 'listDatasetsResponse_nextToken' - A token that you can use in a subsequent call to retrieve the next set
-- of results.
--
-- 'httpStatus', 'listDatasetsResponse_httpStatus' - The response's http status code.
--
-- 'datasets', 'listDatasetsResponse_datasets' - A list of datasets that are defined.
newListDatasetsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListDatasetsResponse
newListDatasetsResponse pHttpStatus_ =
  ListDatasetsResponse'
    { nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_,
      datasets = Prelude.mempty
    }

-- | A token that you can use in a subsequent call to retrieve the next set
-- of results.
listDatasetsResponse_nextToken :: Lens.Lens' ListDatasetsResponse (Prelude.Maybe Prelude.Text)
listDatasetsResponse_nextToken = Lens.lens (\ListDatasetsResponse' {nextToken} -> nextToken) (\s@ListDatasetsResponse' {} a -> s {nextToken = a} :: ListDatasetsResponse)

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

-- | A list of datasets that are defined.
listDatasetsResponse_datasets :: Lens.Lens' ListDatasetsResponse [Dataset]
listDatasetsResponse_datasets = Lens.lens (\ListDatasetsResponse' {datasets} -> datasets) (\s@ListDatasetsResponse' {} a -> s {datasets = a} :: ListDatasetsResponse) Prelude.. Lens.coerced

instance Prelude.NFData ListDatasetsResponse where
  rnf ListDatasetsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf datasets