{-# 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.StepFunctions.ListActivities
-- 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 existing activities.
--
-- If @nextToken@ is returned, there are more results available. The value
-- of @nextToken@ is a unique pagination token for each page. Make the call
-- again using the returned token to retrieve the next page. Keep all other
-- arguments unchanged. Each pagination token expires after 24 hours. Using
-- an expired pagination token will return an /HTTP 400 InvalidToken/
-- error.
--
-- This operation is eventually consistent. The results are best effort and
-- may not reflect very recent updates and changes.
--
-- This operation returns paginated results.
module Amazonka.StepFunctions.ListActivities
  ( -- * Creating a Request
    ListActivities (..),
    newListActivities,

    -- * Request Lenses
    listActivities_maxResults,
    listActivities_nextToken,

    -- * Destructuring the Response
    ListActivitiesResponse (..),
    newListActivitiesResponse,

    -- * Response Lenses
    listActivitiesResponse_nextToken,
    listActivitiesResponse_httpStatus,
    listActivitiesResponse_activities,
  )
where

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
import Amazonka.StepFunctions.Types

-- | /See:/ 'newListActivities' smart constructor.
data ListActivities = ListActivities'
  { -- | The maximum number of results that are returned per call. You can use
    -- @nextToken@ to obtain further pages of results. The default is 100 and
    -- the maximum allowed page size is 1000. A value of 0 uses the default.
    --
    -- This is only an upper limit. The actual number of results returned per
    -- call might be fewer than the specified maximum.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | If @nextToken@ is returned, there are more results available. The value
    -- of @nextToken@ is a unique pagination token for each page. Make the call
    -- again using the returned token to retrieve the next page. Keep all other
    -- arguments unchanged. Each pagination token expires after 24 hours. Using
    -- an expired pagination token will return an /HTTP 400 InvalidToken/
    -- error.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListActivities' 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', 'listActivities_maxResults' - The maximum number of results that are returned per call. You can use
-- @nextToken@ to obtain further pages of results. The default is 100 and
-- the maximum allowed page size is 1000. A value of 0 uses the default.
--
-- This is only an upper limit. The actual number of results returned per
-- call might be fewer than the specified maximum.
--
-- 'nextToken', 'listActivities_nextToken' - If @nextToken@ is returned, there are more results available. The value
-- of @nextToken@ is a unique pagination token for each page. Make the call
-- again using the returned token to retrieve the next page. Keep all other
-- arguments unchanged. Each pagination token expires after 24 hours. Using
-- an expired pagination token will return an /HTTP 400 InvalidToken/
-- error.
newListActivities ::
  ListActivities
newListActivities =
  ListActivities'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of results that are returned per call. You can use
-- @nextToken@ to obtain further pages of results. The default is 100 and
-- the maximum allowed page size is 1000. A value of 0 uses the default.
--
-- This is only an upper limit. The actual number of results returned per
-- call might be fewer than the specified maximum.
listActivities_maxResults :: Lens.Lens' ListActivities (Prelude.Maybe Prelude.Natural)
listActivities_maxResults = Lens.lens (\ListActivities' {maxResults} -> maxResults) (\s@ListActivities' {} a -> s {maxResults = a} :: ListActivities)

-- | If @nextToken@ is returned, there are more results available. The value
-- of @nextToken@ is a unique pagination token for each page. Make the call
-- again using the returned token to retrieve the next page. Keep all other
-- arguments unchanged. Each pagination token expires after 24 hours. Using
-- an expired pagination token will return an /HTTP 400 InvalidToken/
-- error.
listActivities_nextToken :: Lens.Lens' ListActivities (Prelude.Maybe Prelude.Text)
listActivities_nextToken = Lens.lens (\ListActivities' {nextToken} -> nextToken) (\s@ListActivities' {} a -> s {nextToken = a} :: ListActivities)

instance Core.AWSPager ListActivities where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listActivitiesResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        (rs Lens.^. listActivitiesResponse_activities) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listActivities_nextToken
          Lens..~ rs
          Lens.^? listActivitiesResponse_nextToken
          Prelude.. Lens._Just

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

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

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

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

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

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

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

-- | /See:/ 'newListActivitiesResponse' smart constructor.
data ListActivitiesResponse = ListActivitiesResponse'
  { -- | If @nextToken@ is returned, there are more results available. The value
    -- of @nextToken@ is a unique pagination token for each page. Make the call
    -- again using the returned token to retrieve the next page. Keep all other
    -- arguments unchanged. Each pagination token expires after 24 hours. Using
    -- an expired pagination token will return an /HTTP 400 InvalidToken/
    -- error.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | The list of activities.
    activities :: [ActivityListItem]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListActivitiesResponse' 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', 'listActivitiesResponse_nextToken' - If @nextToken@ is returned, there are more results available. The value
-- of @nextToken@ is a unique pagination token for each page. Make the call
-- again using the returned token to retrieve the next page. Keep all other
-- arguments unchanged. Each pagination token expires after 24 hours. Using
-- an expired pagination token will return an /HTTP 400 InvalidToken/
-- error.
--
-- 'httpStatus', 'listActivitiesResponse_httpStatus' - The response's http status code.
--
-- 'activities', 'listActivitiesResponse_activities' - The list of activities.
newListActivitiesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListActivitiesResponse
newListActivitiesResponse pHttpStatus_ =
  ListActivitiesResponse'
    { nextToken =
        Prelude.Nothing,
      httpStatus = pHttpStatus_,
      activities = Prelude.mempty
    }

-- | If @nextToken@ is returned, there are more results available. The value
-- of @nextToken@ is a unique pagination token for each page. Make the call
-- again using the returned token to retrieve the next page. Keep all other
-- arguments unchanged. Each pagination token expires after 24 hours. Using
-- an expired pagination token will return an /HTTP 400 InvalidToken/
-- error.
listActivitiesResponse_nextToken :: Lens.Lens' ListActivitiesResponse (Prelude.Maybe Prelude.Text)
listActivitiesResponse_nextToken = Lens.lens (\ListActivitiesResponse' {nextToken} -> nextToken) (\s@ListActivitiesResponse' {} a -> s {nextToken = a} :: ListActivitiesResponse)

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

-- | The list of activities.
listActivitiesResponse_activities :: Lens.Lens' ListActivitiesResponse [ActivityListItem]
listActivitiesResponse_activities = Lens.lens (\ListActivitiesResponse' {activities} -> activities) (\s@ListActivitiesResponse' {} a -> s {activities = a} :: ListActivitiesResponse) Prelude.. Lens.coerced

instance Prelude.NFData ListActivitiesResponse where
  rnf ListActivitiesResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf activities