{-# 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.IoT.ListThingGroups
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- List the thing groups in your account.
--
-- Requires permission to access the
-- <https://docs.aws.amazon.com/service-authorization/latest/reference/list_awsiot.html#awsiot-actions-as-permissions ListThingGroups>
-- action.
--
-- This operation returns paginated results.
module Amazonka.IoT.ListThingGroups
  ( -- * Creating a Request
    ListThingGroups (..),
    newListThingGroups,

    -- * Request Lenses
    listThingGroups_maxResults,
    listThingGroups_namePrefixFilter,
    listThingGroups_nextToken,
    listThingGroups_parentGroup,
    listThingGroups_recursive,

    -- * Destructuring the Response
    ListThingGroupsResponse (..),
    newListThingGroupsResponse,

    -- * Response Lenses
    listThingGroupsResponse_nextToken,
    listThingGroupsResponse_thingGroups,
    listThingGroupsResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListThingGroups' smart constructor.
data ListThingGroups = ListThingGroups'
  { -- | The maximum number of results to return at one time.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | A filter that limits the results to those with the specified name
    -- prefix.
    namePrefixFilter :: Prelude.Maybe Prelude.Text,
    -- | To retrieve the next set of results, the @nextToken@ value from a
    -- previous response; otherwise __null__ to receive the first set of
    -- results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | A filter that limits the results to those with the specified parent
    -- group.
    parentGroup :: Prelude.Maybe Prelude.Text,
    -- | If true, return child groups as well.
    recursive :: Prelude.Maybe Prelude.Bool
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListThingGroups' 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', 'listThingGroups_maxResults' - The maximum number of results to return at one time.
--
-- 'namePrefixFilter', 'listThingGroups_namePrefixFilter' - A filter that limits the results to those with the specified name
-- prefix.
--
-- 'nextToken', 'listThingGroups_nextToken' - To retrieve the next set of results, the @nextToken@ value from a
-- previous response; otherwise __null__ to receive the first set of
-- results.
--
-- 'parentGroup', 'listThingGroups_parentGroup' - A filter that limits the results to those with the specified parent
-- group.
--
-- 'recursive', 'listThingGroups_recursive' - If true, return child groups as well.
newListThingGroups ::
  ListThingGroups
newListThingGroups =
  ListThingGroups'
    { maxResults = Prelude.Nothing,
      namePrefixFilter = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      parentGroup = Prelude.Nothing,
      recursive = Prelude.Nothing
    }

-- | The maximum number of results to return at one time.
listThingGroups_maxResults :: Lens.Lens' ListThingGroups (Prelude.Maybe Prelude.Natural)
listThingGroups_maxResults = Lens.lens (\ListThingGroups' {maxResults} -> maxResults) (\s@ListThingGroups' {} a -> s {maxResults = a} :: ListThingGroups)

-- | A filter that limits the results to those with the specified name
-- prefix.
listThingGroups_namePrefixFilter :: Lens.Lens' ListThingGroups (Prelude.Maybe Prelude.Text)
listThingGroups_namePrefixFilter = Lens.lens (\ListThingGroups' {namePrefixFilter} -> namePrefixFilter) (\s@ListThingGroups' {} a -> s {namePrefixFilter = a} :: ListThingGroups)

-- | To retrieve the next set of results, the @nextToken@ value from a
-- previous response; otherwise __null__ to receive the first set of
-- results.
listThingGroups_nextToken :: Lens.Lens' ListThingGroups (Prelude.Maybe Prelude.Text)
listThingGroups_nextToken = Lens.lens (\ListThingGroups' {nextToken} -> nextToken) (\s@ListThingGroups' {} a -> s {nextToken = a} :: ListThingGroups)

-- | A filter that limits the results to those with the specified parent
-- group.
listThingGroups_parentGroup :: Lens.Lens' ListThingGroups (Prelude.Maybe Prelude.Text)
listThingGroups_parentGroup = Lens.lens (\ListThingGroups' {parentGroup} -> parentGroup) (\s@ListThingGroups' {} a -> s {parentGroup = a} :: ListThingGroups)

-- | If true, return child groups as well.
listThingGroups_recursive :: Lens.Lens' ListThingGroups (Prelude.Maybe Prelude.Bool)
listThingGroups_recursive = Lens.lens (\ListThingGroups' {recursive} -> recursive) (\s@ListThingGroups' {} a -> s {recursive = a} :: ListThingGroups)

instance Core.AWSPager ListThingGroups where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listThingGroupsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listThingGroupsResponse_thingGroups
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listThingGroups_nextToken
          Lens..~ rs
          Lens.^? listThingGroupsResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable ListThingGroups where
  hashWithSalt _salt ListThingGroups' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` namePrefixFilter
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` parentGroup
      `Prelude.hashWithSalt` recursive

instance Prelude.NFData ListThingGroups where
  rnf ListThingGroups' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf namePrefixFilter
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf parentGroup
      `Prelude.seq` Prelude.rnf recursive

instance Data.ToHeaders ListThingGroups where
  toHeaders = Prelude.const Prelude.mempty

instance Data.ToPath ListThingGroups where
  toPath = Prelude.const "/thing-groups"

instance Data.ToQuery ListThingGroups where
  toQuery ListThingGroups' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "namePrefixFilter" Data.=: namePrefixFilter,
        "nextToken" Data.=: nextToken,
        "parentGroup" Data.=: parentGroup,
        "recursive" Data.=: recursive
      ]

-- | /See:/ 'newListThingGroupsResponse' smart constructor.
data ListThingGroupsResponse = ListThingGroupsResponse'
  { -- | The token to use to get the next set of results. Will not be returned if
    -- operation has returned all results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The thing groups.
    thingGroups :: Prelude.Maybe [GroupNameAndArn],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListThingGroupsResponse' 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', 'listThingGroupsResponse_nextToken' - The token to use to get the next set of results. Will not be returned if
-- operation has returned all results.
--
-- 'thingGroups', 'listThingGroupsResponse_thingGroups' - The thing groups.
--
-- 'httpStatus', 'listThingGroupsResponse_httpStatus' - The response's http status code.
newListThingGroupsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListThingGroupsResponse
newListThingGroupsResponse pHttpStatus_ =
  ListThingGroupsResponse'
    { nextToken =
        Prelude.Nothing,
      thingGroups = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The token to use to get the next set of results. Will not be returned if
-- operation has returned all results.
listThingGroupsResponse_nextToken :: Lens.Lens' ListThingGroupsResponse (Prelude.Maybe Prelude.Text)
listThingGroupsResponse_nextToken = Lens.lens (\ListThingGroupsResponse' {nextToken} -> nextToken) (\s@ListThingGroupsResponse' {} a -> s {nextToken = a} :: ListThingGroupsResponse)

-- | The thing groups.
listThingGroupsResponse_thingGroups :: Lens.Lens' ListThingGroupsResponse (Prelude.Maybe [GroupNameAndArn])
listThingGroupsResponse_thingGroups = Lens.lens (\ListThingGroupsResponse' {thingGroups} -> thingGroups) (\s@ListThingGroupsResponse' {} a -> s {thingGroups = a} :: ListThingGroupsResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData ListThingGroupsResponse where
  rnf ListThingGroupsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf thingGroups
      `Prelude.seq` Prelude.rnf httpStatus