{-# 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.Rekognition.ListDatasetLabels
-- 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 the labels in a dataset. Amazon Rekognition Custom Labels uses
-- labels to describe images. For more information, see
-- <https://docs.aws.amazon.com/rekognition/latest/customlabels-dg/md-labeling-images.html Labeling images>.
--
-- Lists the labels in a dataset. Amazon Rekognition Custom Labels uses
-- labels to describe images. For more information, see Labeling images in
-- the /Amazon Rekognition Custom Labels Developer Guide/.
--
-- This operation returns paginated results.
module Amazonka.Rekognition.ListDatasetLabels
  ( -- * Creating a Request
    ListDatasetLabels (..),
    newListDatasetLabels,

    -- * Request Lenses
    listDatasetLabels_maxResults,
    listDatasetLabels_nextToken,
    listDatasetLabels_datasetArn,

    -- * Destructuring the Response
    ListDatasetLabelsResponse (..),
    newListDatasetLabelsResponse,

    -- * Response Lenses
    listDatasetLabelsResponse_datasetLabelDescriptions,
    listDatasetLabelsResponse_nextToken,
    listDatasetLabelsResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListDatasetLabels' smart constructor.
data ListDatasetLabels = ListDatasetLabels'
  { -- | The maximum number of results to return per paginated call. The largest
    -- value you can specify is 100. If you specify a value greater than 100, a
    -- ValidationException error occurs. The default value is 100.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | If the previous response was incomplete (because there is more results
    -- to retrieve), Amazon Rekognition Custom Labels returns a pagination
    -- token in the response. You can use this pagination token to retrieve the
    -- next set of results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The Amazon Resource Name (ARN) of the dataset that you want to use.
    datasetArn :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListDatasetLabels' 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', 'listDatasetLabels_maxResults' - The maximum number of results to return per paginated call. The largest
-- value you can specify is 100. If you specify a value greater than 100, a
-- ValidationException error occurs. The default value is 100.
--
-- 'nextToken', 'listDatasetLabels_nextToken' - If the previous response was incomplete (because there is more results
-- to retrieve), Amazon Rekognition Custom Labels returns a pagination
-- token in the response. You can use this pagination token to retrieve the
-- next set of results.
--
-- 'datasetArn', 'listDatasetLabels_datasetArn' - The Amazon Resource Name (ARN) of the dataset that you want to use.
newListDatasetLabels ::
  -- | 'datasetArn'
  Prelude.Text ->
  ListDatasetLabels
newListDatasetLabels pDatasetArn_ =
  ListDatasetLabels'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      datasetArn = pDatasetArn_
    }

-- | The maximum number of results to return per paginated call. The largest
-- value you can specify is 100. If you specify a value greater than 100, a
-- ValidationException error occurs. The default value is 100.
listDatasetLabels_maxResults :: Lens.Lens' ListDatasetLabels (Prelude.Maybe Prelude.Natural)
listDatasetLabels_maxResults = Lens.lens (\ListDatasetLabels' {maxResults} -> maxResults) (\s@ListDatasetLabels' {} a -> s {maxResults = a} :: ListDatasetLabels)

-- | If the previous response was incomplete (because there is more results
-- to retrieve), Amazon Rekognition Custom Labels returns a pagination
-- token in the response. You can use this pagination token to retrieve the
-- next set of results.
listDatasetLabels_nextToken :: Lens.Lens' ListDatasetLabels (Prelude.Maybe Prelude.Text)
listDatasetLabels_nextToken = Lens.lens (\ListDatasetLabels' {nextToken} -> nextToken) (\s@ListDatasetLabels' {} a -> s {nextToken = a} :: ListDatasetLabels)

-- | The Amazon Resource Name (ARN) of the dataset that you want to use.
listDatasetLabels_datasetArn :: Lens.Lens' ListDatasetLabels Prelude.Text
listDatasetLabels_datasetArn = Lens.lens (\ListDatasetLabels' {datasetArn} -> datasetArn) (\s@ListDatasetLabels' {} a -> s {datasetArn = a} :: ListDatasetLabels)

instance Core.AWSPager ListDatasetLabels where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listDatasetLabelsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listDatasetLabelsResponse_datasetLabelDescriptions
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listDatasetLabels_nextToken
          Lens..~ rs
          Lens.^? listDatasetLabelsResponse_nextToken
          Prelude.. Lens._Just

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

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

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

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

instance Data.ToJSON ListDatasetLabels where
  toJSON ListDatasetLabels' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("MaxResults" Data..=) Prelude.<$> maxResults,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            Prelude.Just ("DatasetArn" Data..= datasetArn)
          ]
      )

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

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

-- | /See:/ 'newListDatasetLabelsResponse' smart constructor.
data ListDatasetLabelsResponse = ListDatasetLabelsResponse'
  { -- | A list of the labels in the dataset.
    datasetLabelDescriptions :: Prelude.Maybe [DatasetLabelDescription],
    -- | If the previous response was incomplete (because there is more results
    -- to retrieve), Amazon Rekognition Custom Labels returns a pagination
    -- token in the response. You can use this pagination token to retrieve the
    -- next set of results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListDatasetLabelsResponse' 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:
--
-- 'datasetLabelDescriptions', 'listDatasetLabelsResponse_datasetLabelDescriptions' - A list of the labels in the dataset.
--
-- 'nextToken', 'listDatasetLabelsResponse_nextToken' - If the previous response was incomplete (because there is more results
-- to retrieve), Amazon Rekognition Custom Labels returns a pagination
-- token in the response. You can use this pagination token to retrieve the
-- next set of results.
--
-- 'httpStatus', 'listDatasetLabelsResponse_httpStatus' - The response's http status code.
newListDatasetLabelsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListDatasetLabelsResponse
newListDatasetLabelsResponse pHttpStatus_ =
  ListDatasetLabelsResponse'
    { datasetLabelDescriptions =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A list of the labels in the dataset.
listDatasetLabelsResponse_datasetLabelDescriptions :: Lens.Lens' ListDatasetLabelsResponse (Prelude.Maybe [DatasetLabelDescription])
listDatasetLabelsResponse_datasetLabelDescriptions = Lens.lens (\ListDatasetLabelsResponse' {datasetLabelDescriptions} -> datasetLabelDescriptions) (\s@ListDatasetLabelsResponse' {} a -> s {datasetLabelDescriptions = a} :: ListDatasetLabelsResponse) Prelude.. Lens.mapping Lens.coerced

-- | If the previous response was incomplete (because there is more results
-- to retrieve), Amazon Rekognition Custom Labels returns a pagination
-- token in the response. You can use this pagination token to retrieve the
-- next set of results.
listDatasetLabelsResponse_nextToken :: Lens.Lens' ListDatasetLabelsResponse (Prelude.Maybe Prelude.Text)
listDatasetLabelsResponse_nextToken = Lens.lens (\ListDatasetLabelsResponse' {nextToken} -> nextToken) (\s@ListDatasetLabelsResponse' {} a -> s {nextToken = a} :: ListDatasetLabelsResponse)

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

instance Prelude.NFData ListDatasetLabelsResponse where
  rnf ListDatasetLabelsResponse' {..} =
    Prelude.rnf datasetLabelDescriptions
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus