{-# 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.MediaConnect.ListFlows
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Displays a list of flows that are associated with this account. This
-- request returns a paginated result.
--
-- This operation returns paginated results.
module Amazonka.MediaConnect.ListFlows
  ( -- * Creating a Request
    ListFlows (..),
    newListFlows,

    -- * Request Lenses
    listFlows_maxResults,
    listFlows_nextToken,

    -- * Destructuring the Response
    ListFlowsResponse (..),
    newListFlowsResponse,

    -- * Response Lenses
    listFlowsResponse_flows,
    listFlowsResponse_nextToken,
    listFlowsResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListFlows' smart constructor.
data ListFlows = ListFlows'
  { -- | The maximum number of results to return per API request. For example,
    -- you submit a ListFlows request with MaxResults set at 5. Although 20
    -- items match your request, the service returns no more than the first 5
    -- items. (The service also returns a NextToken value that you can use to
    -- fetch the next batch of results.) The service might return fewer results
    -- than the MaxResults value. If MaxResults is not included in the request,
    -- the service defaults to pagination with a maximum of 10 results per
    -- page.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token that identifies which batch of results that you want to see.
    -- For example, you submit a ListFlows request with MaxResults set at 5.
    -- The service returns the first batch of results (up to 5) and a NextToken
    -- value. To see the next batch of results, you can submit the ListFlows
    -- request a second time and specify the NextToken value.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListFlows' 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', 'listFlows_maxResults' - The maximum number of results to return per API request. For example,
-- you submit a ListFlows request with MaxResults set at 5. Although 20
-- items match your request, the service returns no more than the first 5
-- items. (The service also returns a NextToken value that you can use to
-- fetch the next batch of results.) The service might return fewer results
-- than the MaxResults value. If MaxResults is not included in the request,
-- the service defaults to pagination with a maximum of 10 results per
-- page.
--
-- 'nextToken', 'listFlows_nextToken' - The token that identifies which batch of results that you want to see.
-- For example, you submit a ListFlows request with MaxResults set at 5.
-- The service returns the first batch of results (up to 5) and a NextToken
-- value. To see the next batch of results, you can submit the ListFlows
-- request a second time and specify the NextToken value.
newListFlows ::
  ListFlows
newListFlows =
  ListFlows'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of results to return per API request. For example,
-- you submit a ListFlows request with MaxResults set at 5. Although 20
-- items match your request, the service returns no more than the first 5
-- items. (The service also returns a NextToken value that you can use to
-- fetch the next batch of results.) The service might return fewer results
-- than the MaxResults value. If MaxResults is not included in the request,
-- the service defaults to pagination with a maximum of 10 results per
-- page.
listFlows_maxResults :: Lens.Lens' ListFlows (Prelude.Maybe Prelude.Natural)
listFlows_maxResults = Lens.lens (\ListFlows' {maxResults} -> maxResults) (\s@ListFlows' {} a -> s {maxResults = a} :: ListFlows)

-- | The token that identifies which batch of results that you want to see.
-- For example, you submit a ListFlows request with MaxResults set at 5.
-- The service returns the first batch of results (up to 5) and a NextToken
-- value. To see the next batch of results, you can submit the ListFlows
-- request a second time and specify the NextToken value.
listFlows_nextToken :: Lens.Lens' ListFlows (Prelude.Maybe Prelude.Text)
listFlows_nextToken = Lens.lens (\ListFlows' {nextToken} -> nextToken) (\s@ListFlows' {} a -> s {nextToken = a} :: ListFlows)

instance Core.AWSPager ListFlows where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listFlowsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listFlowsResponse_flows
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listFlows_nextToken
          Lens..~ rs
          Lens.^? listFlowsResponse_nextToken
          Prelude.. Lens._Just

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

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

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

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

instance Data.ToPath ListFlows where
  toPath = Prelude.const "/v1/flows"

instance Data.ToQuery ListFlows where
  toQuery ListFlows' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "nextToken" Data.=: nextToken
      ]

-- | /See:/ 'newListFlowsResponse' smart constructor.
data ListFlowsResponse = ListFlowsResponse'
  { -- | A list of flow summaries.
    flows :: Prelude.Maybe [ListedFlow],
    -- | The token that identifies which batch of results that you want to see.
    -- For example, you submit a ListFlows request with MaxResults set at 5.
    -- The service returns the first batch of results (up to 5) and a NextToken
    -- value. To see the next batch of results, you can submit the ListFlows
    -- request a second time and specify the NextToken value.
    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 'ListFlowsResponse' 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:
--
-- 'flows', 'listFlowsResponse_flows' - A list of flow summaries.
--
-- 'nextToken', 'listFlowsResponse_nextToken' - The token that identifies which batch of results that you want to see.
-- For example, you submit a ListFlows request with MaxResults set at 5.
-- The service returns the first batch of results (up to 5) and a NextToken
-- value. To see the next batch of results, you can submit the ListFlows
-- request a second time and specify the NextToken value.
--
-- 'httpStatus', 'listFlowsResponse_httpStatus' - The response's http status code.
newListFlowsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListFlowsResponse
newListFlowsResponse pHttpStatus_ =
  ListFlowsResponse'
    { flows = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A list of flow summaries.
listFlowsResponse_flows :: Lens.Lens' ListFlowsResponse (Prelude.Maybe [ListedFlow])
listFlowsResponse_flows = Lens.lens (\ListFlowsResponse' {flows} -> flows) (\s@ListFlowsResponse' {} a -> s {flows = a} :: ListFlowsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The token that identifies which batch of results that you want to see.
-- For example, you submit a ListFlows request with MaxResults set at 5.
-- The service returns the first batch of results (up to 5) and a NextToken
-- value. To see the next batch of results, you can submit the ListFlows
-- request a second time and specify the NextToken value.
listFlowsResponse_nextToken :: Lens.Lens' ListFlowsResponse (Prelude.Maybe Prelude.Text)
listFlowsResponse_nextToken = Lens.lens (\ListFlowsResponse' {nextToken} -> nextToken) (\s@ListFlowsResponse' {} a -> s {nextToken = a} :: ListFlowsResponse)

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

instance Prelude.NFData ListFlowsResponse where
  rnf ListFlowsResponse' {..} =
    Prelude.rnf flows
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus