{-# 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.FMS.ListPolicies
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns an array of @PolicySummary@ objects.
--
-- This operation returns paginated results.
module Amazonka.FMS.ListPolicies
  ( -- * Creating a Request
    ListPolicies (..),
    newListPolicies,

    -- * Request Lenses
    listPolicies_maxResults,
    listPolicies_nextToken,

    -- * Destructuring the Response
    ListPoliciesResponse (..),
    newListPoliciesResponse,

    -- * Response Lenses
    listPoliciesResponse_nextToken,
    listPoliciesResponse_policyList,
    listPoliciesResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListPolicies' smart constructor.
data ListPolicies = ListPolicies'
  { -- | Specifies the number of @PolicySummary@ objects that you want Firewall
    -- Manager to return for this request. If you have more @PolicySummary@
    -- objects than the number that you specify for @MaxResults@, the response
    -- includes a @NextToken@ value that you can use to get another batch of
    -- @PolicySummary@ objects.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | If you specify a value for @MaxResults@ and you have more
    -- @PolicySummary@ objects than the number that you specify for
    -- @MaxResults@, Firewall Manager returns a @NextToken@ value in the
    -- response that allows you to list another group of @PolicySummary@
    -- objects. For the second and subsequent @ListPolicies@ requests, specify
    -- the value of @NextToken@ from the previous response to get information
    -- about another batch of @PolicySummary@ objects.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListPolicies' 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', 'listPolicies_maxResults' - Specifies the number of @PolicySummary@ objects that you want Firewall
-- Manager to return for this request. If you have more @PolicySummary@
-- objects than the number that you specify for @MaxResults@, the response
-- includes a @NextToken@ value that you can use to get another batch of
-- @PolicySummary@ objects.
--
-- 'nextToken', 'listPolicies_nextToken' - If you specify a value for @MaxResults@ and you have more
-- @PolicySummary@ objects than the number that you specify for
-- @MaxResults@, Firewall Manager returns a @NextToken@ value in the
-- response that allows you to list another group of @PolicySummary@
-- objects. For the second and subsequent @ListPolicies@ requests, specify
-- the value of @NextToken@ from the previous response to get information
-- about another batch of @PolicySummary@ objects.
newListPolicies ::
  ListPolicies
newListPolicies =
  ListPolicies'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | Specifies the number of @PolicySummary@ objects that you want Firewall
-- Manager to return for this request. If you have more @PolicySummary@
-- objects than the number that you specify for @MaxResults@, the response
-- includes a @NextToken@ value that you can use to get another batch of
-- @PolicySummary@ objects.
listPolicies_maxResults :: Lens.Lens' ListPolicies (Prelude.Maybe Prelude.Natural)
listPolicies_maxResults = Lens.lens (\ListPolicies' {maxResults} -> maxResults) (\s@ListPolicies' {} a -> s {maxResults = a} :: ListPolicies)

-- | If you specify a value for @MaxResults@ and you have more
-- @PolicySummary@ objects than the number that you specify for
-- @MaxResults@, Firewall Manager returns a @NextToken@ value in the
-- response that allows you to list another group of @PolicySummary@
-- objects. For the second and subsequent @ListPolicies@ requests, specify
-- the value of @NextToken@ from the previous response to get information
-- about another batch of @PolicySummary@ objects.
listPolicies_nextToken :: Lens.Lens' ListPolicies (Prelude.Maybe Prelude.Text)
listPolicies_nextToken = Lens.lens (\ListPolicies' {nextToken} -> nextToken) (\s@ListPolicies' {} a -> s {nextToken = a} :: ListPolicies)

instance Core.AWSPager ListPolicies where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listPoliciesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listPoliciesResponse_policyList
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listPolicies_nextToken
          Lens..~ rs
          Lens.^? listPoliciesResponse_nextToken
          Prelude.. Lens._Just

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

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

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

instance Data.ToHeaders ListPolicies where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "AWSFMS_20180101.ListPolicies" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

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

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

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

-- | /See:/ 'newListPoliciesResponse' smart constructor.
data ListPoliciesResponse = ListPoliciesResponse'
  { -- | If you have more @PolicySummary@ objects than the number that you
    -- specified for @MaxResults@ in the request, the response includes a
    -- @NextToken@ value. To list more @PolicySummary@ objects, submit another
    -- @ListPolicies@ request, and specify the @NextToken@ value from the
    -- response in the @NextToken@ value in the next request.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | An array of @PolicySummary@ objects.
    policyList :: Prelude.Maybe [PolicySummary],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListPoliciesResponse' 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', 'listPoliciesResponse_nextToken' - If you have more @PolicySummary@ objects than the number that you
-- specified for @MaxResults@ in the request, the response includes a
-- @NextToken@ value. To list more @PolicySummary@ objects, submit another
-- @ListPolicies@ request, and specify the @NextToken@ value from the
-- response in the @NextToken@ value in the next request.
--
-- 'policyList', 'listPoliciesResponse_policyList' - An array of @PolicySummary@ objects.
--
-- 'httpStatus', 'listPoliciesResponse_httpStatus' - The response's http status code.
newListPoliciesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListPoliciesResponse
newListPoliciesResponse pHttpStatus_ =
  ListPoliciesResponse'
    { nextToken = Prelude.Nothing,
      policyList = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | If you have more @PolicySummary@ objects than the number that you
-- specified for @MaxResults@ in the request, the response includes a
-- @NextToken@ value. To list more @PolicySummary@ objects, submit another
-- @ListPolicies@ request, and specify the @NextToken@ value from the
-- response in the @NextToken@ value in the next request.
listPoliciesResponse_nextToken :: Lens.Lens' ListPoliciesResponse (Prelude.Maybe Prelude.Text)
listPoliciesResponse_nextToken = Lens.lens (\ListPoliciesResponse' {nextToken} -> nextToken) (\s@ListPoliciesResponse' {} a -> s {nextToken = a} :: ListPoliciesResponse)

-- | An array of @PolicySummary@ objects.
listPoliciesResponse_policyList :: Lens.Lens' ListPoliciesResponse (Prelude.Maybe [PolicySummary])
listPoliciesResponse_policyList = Lens.lens (\ListPoliciesResponse' {policyList} -> policyList) (\s@ListPoliciesResponse' {} a -> s {policyList = a} :: ListPoliciesResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData ListPoliciesResponse where
  rnf ListPoliciesResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf policyList
      `Prelude.seq` Prelude.rnf httpStatus