{-# 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.SWF.CountPendingActivityTasks
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns the estimated number of activity tasks in the specified task
-- list. The count returned is an approximation and isn\'t guaranteed to be
-- exact. If you specify a task list that no activity task was ever
-- scheduled in then @0@ is returned.
--
-- __Access Control__
--
-- You can use IAM policies to control this action\'s access to Amazon SWF
-- resources as follows:
--
-- -   Use a @Resource@ element with the domain name to limit the action to
--     only specified domains.
--
-- -   Use an @Action@ element to allow or deny permission to call this
--     action.
--
-- -   Constrain the @taskList.name@ parameter by using a @Condition@
--     element with the @swf:taskList.name@ key to allow the action to
--     access only certain task lists.
--
-- If the caller doesn\'t have sufficient permissions to invoke the action,
-- or the parameter values fall outside the specified constraints, the
-- action fails. The associated event attribute\'s @cause@ parameter is set
-- to @OPERATION_NOT_PERMITTED@. For details and example IAM policies, see
-- <https://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html Using IAM to Manage Access to Amazon SWF Workflows>
-- in the /Amazon SWF Developer Guide/.
module Amazonka.SWF.CountPendingActivityTasks
  ( -- * Creating a Request
    CountPendingActivityTasks (..),
    newCountPendingActivityTasks,

    -- * Request Lenses
    countPendingActivityTasks_domain,
    countPendingActivityTasks_taskList,

    -- * Destructuring the Response
    PendingTaskCount (..),
    newPendingTaskCount,

    -- * Response Lenses
    pendingTaskCount_truncated,
    pendingTaskCount_count,
  )
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.SWF.Types

-- | /See:/ 'newCountPendingActivityTasks' smart constructor.
data CountPendingActivityTasks = CountPendingActivityTasks'
  { -- | The name of the domain that contains the task list.
    domain :: Prelude.Text,
    -- | The name of the task list.
    taskList :: TaskList
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'CountPendingActivityTasks' 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:
--
-- 'domain', 'countPendingActivityTasks_domain' - The name of the domain that contains the task list.
--
-- 'taskList', 'countPendingActivityTasks_taskList' - The name of the task list.
newCountPendingActivityTasks ::
  -- | 'domain'
  Prelude.Text ->
  -- | 'taskList'
  TaskList ->
  CountPendingActivityTasks
newCountPendingActivityTasks pDomain_ pTaskList_ =
  CountPendingActivityTasks'
    { domain = pDomain_,
      taskList = pTaskList_
    }

-- | The name of the domain that contains the task list.
countPendingActivityTasks_domain :: Lens.Lens' CountPendingActivityTasks Prelude.Text
countPendingActivityTasks_domain = Lens.lens (\CountPendingActivityTasks' {domain} -> domain) (\s@CountPendingActivityTasks' {} a -> s {domain = a} :: CountPendingActivityTasks)

-- | The name of the task list.
countPendingActivityTasks_taskList :: Lens.Lens' CountPendingActivityTasks TaskList
countPendingActivityTasks_taskList = Lens.lens (\CountPendingActivityTasks' {taskList} -> taskList) (\s@CountPendingActivityTasks' {} a -> s {taskList = a} :: CountPendingActivityTasks)

instance Core.AWSRequest CountPendingActivityTasks where
  type
    AWSResponse CountPendingActivityTasks =
      PendingTaskCount
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      (\s h x -> Data.eitherParseJSON x)

instance Prelude.Hashable CountPendingActivityTasks where
  hashWithSalt _salt CountPendingActivityTasks' {..} =
    _salt
      `Prelude.hashWithSalt` domain
      `Prelude.hashWithSalt` taskList

instance Prelude.NFData CountPendingActivityTasks where
  rnf CountPendingActivityTasks' {..} =
    Prelude.rnf domain
      `Prelude.seq` Prelude.rnf taskList

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

instance Data.ToJSON CountPendingActivityTasks where
  toJSON CountPendingActivityTasks' {..} =
    Data.object
      ( Prelude.catMaybes
          [ Prelude.Just ("domain" Data..= domain),
            Prelude.Just ("taskList" Data..= taskList)
          ]
      )

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

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