{-# 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.IVS.ListStreams
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Gets summary information about live streams in your account, in the
-- Amazon Web Services region where the API request is processed.
--
-- This operation returns paginated results.
module Amazonka.IVS.ListStreams
  ( -- * Creating a Request
    ListStreams (..),
    newListStreams,

    -- * Request Lenses
    listStreams_filterBy,
    listStreams_maxResults,
    listStreams_nextToken,

    -- * Destructuring the Response
    ListStreamsResponse (..),
    newListStreamsResponse,

    -- * Response Lenses
    listStreamsResponse_nextToken,
    listStreamsResponse_httpStatus,
    listStreamsResponse_streams,
  )
where

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

-- | /See:/ 'newListStreams' smart constructor.
data ListStreams = ListStreams'
  { -- | Filters the stream list to match the specified criterion.
    filterBy :: Prelude.Maybe StreamFilters,
    -- | Maximum number of streams to return. Default: 100.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The first stream to retrieve. This is used for pagination; see the
    -- @nextToken@ response field.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListStreams' 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:
--
-- 'filterBy', 'listStreams_filterBy' - Filters the stream list to match the specified criterion.
--
-- 'maxResults', 'listStreams_maxResults' - Maximum number of streams to return. Default: 100.
--
-- 'nextToken', 'listStreams_nextToken' - The first stream to retrieve. This is used for pagination; see the
-- @nextToken@ response field.
newListStreams ::
  ListStreams
newListStreams =
  ListStreams'
    { filterBy = Prelude.Nothing,
      maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | Filters the stream list to match the specified criterion.
listStreams_filterBy :: Lens.Lens' ListStreams (Prelude.Maybe StreamFilters)
listStreams_filterBy = Lens.lens (\ListStreams' {filterBy} -> filterBy) (\s@ListStreams' {} a -> s {filterBy = a} :: ListStreams)

-- | Maximum number of streams to return. Default: 100.
listStreams_maxResults :: Lens.Lens' ListStreams (Prelude.Maybe Prelude.Natural)
listStreams_maxResults = Lens.lens (\ListStreams' {maxResults} -> maxResults) (\s@ListStreams' {} a -> s {maxResults = a} :: ListStreams)

-- | The first stream to retrieve. This is used for pagination; see the
-- @nextToken@ response field.
listStreams_nextToken :: Lens.Lens' ListStreams (Prelude.Maybe Prelude.Text)
listStreams_nextToken = Lens.lens (\ListStreams' {nextToken} -> nextToken) (\s@ListStreams' {} a -> s {nextToken = a} :: ListStreams)

instance Core.AWSPager ListStreams where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listStreamsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop (rs Lens.^. listStreamsResponse_streams) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listStreams_nextToken
          Lens..~ rs
          Lens.^? listStreamsResponse_nextToken
          Prelude.. Lens._Just

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

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

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

instance Data.ToHeaders ListStreams where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

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

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

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

-- | /See:/ 'newListStreamsResponse' smart constructor.
data ListStreamsResponse = ListStreamsResponse'
  { -- | If there are more streams than @maxResults@, use @nextToken@ in the
    -- request to get the next set.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | List of streams.
    streams :: [StreamSummary]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListStreamsResponse' 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', 'listStreamsResponse_nextToken' - If there are more streams than @maxResults@, use @nextToken@ in the
-- request to get the next set.
--
-- 'httpStatus', 'listStreamsResponse_httpStatus' - The response's http status code.
--
-- 'streams', 'listStreamsResponse_streams' - List of streams.
newListStreamsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListStreamsResponse
newListStreamsResponse pHttpStatus_ =
  ListStreamsResponse'
    { nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_,
      streams = Prelude.mempty
    }

-- | If there are more streams than @maxResults@, use @nextToken@ in the
-- request to get the next set.
listStreamsResponse_nextToken :: Lens.Lens' ListStreamsResponse (Prelude.Maybe Prelude.Text)
listStreamsResponse_nextToken = Lens.lens (\ListStreamsResponse' {nextToken} -> nextToken) (\s@ListStreamsResponse' {} a -> s {nextToken = a} :: ListStreamsResponse)

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

-- | List of streams.
listStreamsResponse_streams :: Lens.Lens' ListStreamsResponse [StreamSummary]
listStreamsResponse_streams = Lens.lens (\ListStreamsResponse' {streams} -> streams) (\s@ListStreamsResponse' {} a -> s {streams = a} :: ListStreamsResponse) Prelude.. Lens.coerced

instance Prelude.NFData ListStreamsResponse where
  rnf ListStreamsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf streams