{-# 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.NetworkFirewall.ListFirewallPolicies
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Retrieves the metadata for the firewall policies that you have defined.
-- Depending on your setting for max results and the number of firewall
-- policies, a single call might not return the full list.
--
-- This operation returns paginated results.
module Amazonka.NetworkFirewall.ListFirewallPolicies
  ( -- * Creating a Request
    ListFirewallPolicies (..),
    newListFirewallPolicies,

    -- * Request Lenses
    listFirewallPolicies_maxResults,
    listFirewallPolicies_nextToken,

    -- * Destructuring the Response
    ListFirewallPoliciesResponse (..),
    newListFirewallPoliciesResponse,

    -- * Response Lenses
    listFirewallPoliciesResponse_firewallPolicies,
    listFirewallPoliciesResponse_nextToken,
    listFirewallPoliciesResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListFirewallPolicies' smart constructor.
data ListFirewallPolicies = ListFirewallPolicies'
  { -- | The maximum number of objects that you want Network Firewall to return
    -- for this request. If more objects are available, in the response,
    -- Network Firewall provides a @NextToken@ value that you can use in a
    -- subsequent call to get the next batch of objects.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | When you request a list of objects with a @MaxResults@ setting, if the
    -- number of objects that are still available for retrieval exceeds the
    -- maximum you requested, Network Firewall returns a @NextToken@ value in
    -- the response. To retrieve the next batch of objects, use the token
    -- returned from the prior request in your next request.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListFirewallPolicies' 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', 'listFirewallPolicies_maxResults' - The maximum number of objects that you want Network Firewall to return
-- for this request. If more objects are available, in the response,
-- Network Firewall provides a @NextToken@ value that you can use in a
-- subsequent call to get the next batch of objects.
--
-- 'nextToken', 'listFirewallPolicies_nextToken' - When you request a list of objects with a @MaxResults@ setting, if the
-- number of objects that are still available for retrieval exceeds the
-- maximum you requested, Network Firewall returns a @NextToken@ value in
-- the response. To retrieve the next batch of objects, use the token
-- returned from the prior request in your next request.
newListFirewallPolicies ::
  ListFirewallPolicies
newListFirewallPolicies =
  ListFirewallPolicies'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of objects that you want Network Firewall to return
-- for this request. If more objects are available, in the response,
-- Network Firewall provides a @NextToken@ value that you can use in a
-- subsequent call to get the next batch of objects.
listFirewallPolicies_maxResults :: Lens.Lens' ListFirewallPolicies (Prelude.Maybe Prelude.Natural)
listFirewallPolicies_maxResults = Lens.lens (\ListFirewallPolicies' {maxResults} -> maxResults) (\s@ListFirewallPolicies' {} a -> s {maxResults = a} :: ListFirewallPolicies)

-- | When you request a list of objects with a @MaxResults@ setting, if the
-- number of objects that are still available for retrieval exceeds the
-- maximum you requested, Network Firewall returns a @NextToken@ value in
-- the response. To retrieve the next batch of objects, use the token
-- returned from the prior request in your next request.
listFirewallPolicies_nextToken :: Lens.Lens' ListFirewallPolicies (Prelude.Maybe Prelude.Text)
listFirewallPolicies_nextToken = Lens.lens (\ListFirewallPolicies' {nextToken} -> nextToken) (\s@ListFirewallPolicies' {} a -> s {nextToken = a} :: ListFirewallPolicies)

instance Core.AWSPager ListFirewallPolicies where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listFirewallPoliciesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listFirewallPoliciesResponse_firewallPolicies
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listFirewallPolicies_nextToken
          Lens..~ rs
          Lens.^? listFirewallPoliciesResponse_nextToken
          Prelude.. Lens._Just

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

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

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

instance Data.ToHeaders ListFirewallPolicies where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "NetworkFirewall_20201112.ListFirewallPolicies" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.0" ::
                          Prelude.ByteString
                      )
          ]
      )

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

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

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

-- | /See:/ 'newListFirewallPoliciesResponse' smart constructor.
data ListFirewallPoliciesResponse = ListFirewallPoliciesResponse'
  { -- | The metadata for the firewall policies. Depending on your setting for
    -- max results and the number of firewall policies that you have, this
    -- might not be the full list.
    firewallPolicies :: Prelude.Maybe [FirewallPolicyMetadata],
    -- | When you request a list of objects with a @MaxResults@ setting, if the
    -- number of objects that are still available for retrieval exceeds the
    -- maximum you requested, Network Firewall returns a @NextToken@ value in
    -- the response. To retrieve the next batch of objects, use the token
    -- returned from the prior request in your next request.
    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 'ListFirewallPoliciesResponse' 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:
--
-- 'firewallPolicies', 'listFirewallPoliciesResponse_firewallPolicies' - The metadata for the firewall policies. Depending on your setting for
-- max results and the number of firewall policies that you have, this
-- might not be the full list.
--
-- 'nextToken', 'listFirewallPoliciesResponse_nextToken' - When you request a list of objects with a @MaxResults@ setting, if the
-- number of objects that are still available for retrieval exceeds the
-- maximum you requested, Network Firewall returns a @NextToken@ value in
-- the response. To retrieve the next batch of objects, use the token
-- returned from the prior request in your next request.
--
-- 'httpStatus', 'listFirewallPoliciesResponse_httpStatus' - The response's http status code.
newListFirewallPoliciesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListFirewallPoliciesResponse
newListFirewallPoliciesResponse pHttpStatus_ =
  ListFirewallPoliciesResponse'
    { firewallPolicies =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The metadata for the firewall policies. Depending on your setting for
-- max results and the number of firewall policies that you have, this
-- might not be the full list.
listFirewallPoliciesResponse_firewallPolicies :: Lens.Lens' ListFirewallPoliciesResponse (Prelude.Maybe [FirewallPolicyMetadata])
listFirewallPoliciesResponse_firewallPolicies = Lens.lens (\ListFirewallPoliciesResponse' {firewallPolicies} -> firewallPolicies) (\s@ListFirewallPoliciesResponse' {} a -> s {firewallPolicies = a} :: ListFirewallPoliciesResponse) Prelude.. Lens.mapping Lens.coerced

-- | When you request a list of objects with a @MaxResults@ setting, if the
-- number of objects that are still available for retrieval exceeds the
-- maximum you requested, Network Firewall returns a @NextToken@ value in
-- the response. To retrieve the next batch of objects, use the token
-- returned from the prior request in your next request.
listFirewallPoliciesResponse_nextToken :: Lens.Lens' ListFirewallPoliciesResponse (Prelude.Maybe Prelude.Text)
listFirewallPoliciesResponse_nextToken = Lens.lens (\ListFirewallPoliciesResponse' {nextToken} -> nextToken) (\s@ListFirewallPoliciesResponse' {} a -> s {nextToken = a} :: ListFirewallPoliciesResponse)

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

instance Prelude.NFData ListFirewallPoliciesResponse where
  rnf ListFirewallPoliciesResponse' {..} =
    Prelude.rnf firewallPolicies
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus