{-# 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.CloudTrail.ListChannels
-- 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 channels in the current account, and their source names.
-- Amazon Web Services services create service-linked channels get
-- information about CloudTrail events on your behalf. For more information
-- about service-linked channels, see
-- <https://docs.aws.amazon.com/awscloudtrail/latest/userguide/viewing-service-linked-channels.html Viewing service-linked channels for CloudTrail by using the CLI>.
module Amazonka.CloudTrail.ListChannels
  ( -- * Creating a Request
    ListChannels (..),
    newListChannels,

    -- * Request Lenses
    listChannels_maxResults,
    listChannels_nextToken,

    -- * Destructuring the Response
    ListChannelsResponse (..),
    newListChannelsResponse,

    -- * Response Lenses
    listChannelsResponse_channels,
    listChannelsResponse_nextToken,
    listChannelsResponse_httpStatus,
  )
where

import Amazonka.CloudTrail.Types
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 qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | /See:/ 'newListChannels' smart constructor.
data ListChannels = ListChannels'
  { -- | The maximum number of CloudTrail channels to display on a single page.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token to use to get the next page of results after a previous API
    -- call. This token must be passed in with the same parameters that were
    -- specified in the original call. For example, if the original call
    -- specified an AttributeKey of \'Username\' with a value of \'root\', the
    -- call with NextToken should include those same parameters.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListChannels' 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', 'listChannels_maxResults' - The maximum number of CloudTrail channels to display on a single page.
--
-- 'nextToken', 'listChannels_nextToken' - The token to use to get the next page of results after a previous API
-- call. This token must be passed in with the same parameters that were
-- specified in the original call. For example, if the original call
-- specified an AttributeKey of \'Username\' with a value of \'root\', the
-- call with NextToken should include those same parameters.
newListChannels ::
  ListChannels
newListChannels =
  ListChannels'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of CloudTrail channels to display on a single page.
listChannels_maxResults :: Lens.Lens' ListChannels (Prelude.Maybe Prelude.Natural)
listChannels_maxResults = Lens.lens (\ListChannels' {maxResults} -> maxResults) (\s@ListChannels' {} a -> s {maxResults = a} :: ListChannels)

-- | The token to use to get the next page of results after a previous API
-- call. This token must be passed in with the same parameters that were
-- specified in the original call. For example, if the original call
-- specified an AttributeKey of \'Username\' with a value of \'root\', the
-- call with NextToken should include those same parameters.
listChannels_nextToken :: Lens.Lens' ListChannels (Prelude.Maybe Prelude.Text)
listChannels_nextToken = Lens.lens (\ListChannels' {nextToken} -> nextToken) (\s@ListChannels' {} a -> s {nextToken = a} :: ListChannels)

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

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

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

instance Data.ToHeaders ListChannels where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "com.amazonaws.cloudtrail.v20131101.CloudTrail_20131101.ListChannels" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

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

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

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

-- | /See:/ 'newListChannelsResponse' smart constructor.
data ListChannelsResponse = ListChannelsResponse'
  { -- | The list of channels in the account.
    channels :: Prelude.Maybe [Channel],
    -- | The token to use to get the next page of results after a previous API
    -- call.
    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 'ListChannelsResponse' 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:
--
-- 'channels', 'listChannelsResponse_channels' - The list of channels in the account.
--
-- 'nextToken', 'listChannelsResponse_nextToken' - The token to use to get the next page of results after a previous API
-- call.
--
-- 'httpStatus', 'listChannelsResponse_httpStatus' - The response's http status code.
newListChannelsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListChannelsResponse
newListChannelsResponse pHttpStatus_ =
  ListChannelsResponse'
    { channels = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The list of channels in the account.
listChannelsResponse_channels :: Lens.Lens' ListChannelsResponse (Prelude.Maybe [Channel])
listChannelsResponse_channels = Lens.lens (\ListChannelsResponse' {channels} -> channels) (\s@ListChannelsResponse' {} a -> s {channels = a} :: ListChannelsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The token to use to get the next page of results after a previous API
-- call.
listChannelsResponse_nextToken :: Lens.Lens' ListChannelsResponse (Prelude.Maybe Prelude.Text)
listChannelsResponse_nextToken = Lens.lens (\ListChannelsResponse' {nextToken} -> nextToken) (\s@ListChannelsResponse' {} a -> s {nextToken = a} :: ListChannelsResponse)

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

instance Prelude.NFData ListChannelsResponse where
  rnf ListChannelsResponse' {..} =
    Prelude.rnf channels
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus