{-# 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.Glue.GetClassifiers
-- 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 classifier objects in the Data Catalog.
--
-- This operation returns paginated results.
module Amazonka.Glue.GetClassifiers
  ( -- * Creating a Request
    GetClassifiers (..),
    newGetClassifiers,

    -- * Request Lenses
    getClassifiers_maxResults,
    getClassifiers_nextToken,

    -- * Destructuring the Response
    GetClassifiersResponse (..),
    newGetClassifiersResponse,

    -- * Response Lenses
    getClassifiersResponse_classifiers,
    getClassifiersResponse_nextToken,
    getClassifiersResponse_httpStatus,
  )
where

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

-- | /See:/ 'newGetClassifiers' smart constructor.
data GetClassifiers = GetClassifiers'
  { -- | The size of the list to return (optional).
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | An optional continuation token.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetClassifiers' 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', 'getClassifiers_maxResults' - The size of the list to return (optional).
--
-- 'nextToken', 'getClassifiers_nextToken' - An optional continuation token.
newGetClassifiers ::
  GetClassifiers
newGetClassifiers =
  GetClassifiers'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The size of the list to return (optional).
getClassifiers_maxResults :: Lens.Lens' GetClassifiers (Prelude.Maybe Prelude.Natural)
getClassifiers_maxResults = Lens.lens (\GetClassifiers' {maxResults} -> maxResults) (\s@GetClassifiers' {} a -> s {maxResults = a} :: GetClassifiers)

-- | An optional continuation token.
getClassifiers_nextToken :: Lens.Lens' GetClassifiers (Prelude.Maybe Prelude.Text)
getClassifiers_nextToken = Lens.lens (\GetClassifiers' {nextToken} -> nextToken) (\s@GetClassifiers' {} a -> s {nextToken = a} :: GetClassifiers)

instance Core.AWSPager GetClassifiers where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? getClassifiersResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? getClassifiersResponse_classifiers
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& getClassifiers_nextToken
          Lens..~ rs
          Lens.^? getClassifiersResponse_nextToken
          Prelude.. Lens._Just

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

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

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

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

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

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

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

-- | /See:/ 'newGetClassifiersResponse' smart constructor.
data GetClassifiersResponse = GetClassifiersResponse'
  { -- | The requested list of classifier objects.
    classifiers :: Prelude.Maybe [Classifier],
    -- | A continuation token.
    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 'GetClassifiersResponse' 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:
--
-- 'classifiers', 'getClassifiersResponse_classifiers' - The requested list of classifier objects.
--
-- 'nextToken', 'getClassifiersResponse_nextToken' - A continuation token.
--
-- 'httpStatus', 'getClassifiersResponse_httpStatus' - The response's http status code.
newGetClassifiersResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  GetClassifiersResponse
newGetClassifiersResponse pHttpStatus_ =
  GetClassifiersResponse'
    { classifiers =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The requested list of classifier objects.
getClassifiersResponse_classifiers :: Lens.Lens' GetClassifiersResponse (Prelude.Maybe [Classifier])
getClassifiersResponse_classifiers = Lens.lens (\GetClassifiersResponse' {classifiers} -> classifiers) (\s@GetClassifiersResponse' {} a -> s {classifiers = a} :: GetClassifiersResponse) Prelude.. Lens.mapping Lens.coerced

-- | A continuation token.
getClassifiersResponse_nextToken :: Lens.Lens' GetClassifiersResponse (Prelude.Maybe Prelude.Text)
getClassifiersResponse_nextToken = Lens.lens (\GetClassifiersResponse' {nextToken} -> nextToken) (\s@GetClassifiersResponse' {} a -> s {nextToken = a} :: GetClassifiersResponse)

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

instance Prelude.NFData GetClassifiersResponse where
  rnf GetClassifiersResponse' {..} =
    Prelude.rnf classifiers
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus