{-# 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.CloudWatchEvents.ListTargetsByRule
-- 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 targets assigned to the specified rule.
--
-- This operation returns paginated results.
module Amazonka.CloudWatchEvents.ListTargetsByRule
  ( -- * Creating a Request
    ListTargetsByRule (..),
    newListTargetsByRule,

    -- * Request Lenses
    listTargetsByRule_eventBusName,
    listTargetsByRule_limit,
    listTargetsByRule_nextToken,
    listTargetsByRule_rule,

    -- * Destructuring the Response
    ListTargetsByRuleResponse (..),
    newListTargetsByRuleResponse,

    -- * Response Lenses
    listTargetsByRuleResponse_nextToken,
    listTargetsByRuleResponse_targets,
    listTargetsByRuleResponse_httpStatus,
  )
where

import Amazonka.CloudWatchEvents.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:/ 'newListTargetsByRule' smart constructor.
data ListTargetsByRule = ListTargetsByRule'
  { -- | The name or ARN of the event bus associated with the rule. If you omit
    -- this, the default event bus is used.
    eventBusName :: Prelude.Maybe Prelude.Text,
    -- | The maximum number of results to return.
    limit :: Prelude.Maybe Prelude.Natural,
    -- | The token returned by a previous call to retrieve the next set of
    -- results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The name of the rule.
    rule :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListTargetsByRule' 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:
--
-- 'eventBusName', 'listTargetsByRule_eventBusName' - The name or ARN of the event bus associated with the rule. If you omit
-- this, the default event bus is used.
--
-- 'limit', 'listTargetsByRule_limit' - The maximum number of results to return.
--
-- 'nextToken', 'listTargetsByRule_nextToken' - The token returned by a previous call to retrieve the next set of
-- results.
--
-- 'rule', 'listTargetsByRule_rule' - The name of the rule.
newListTargetsByRule ::
  -- | 'rule'
  Prelude.Text ->
  ListTargetsByRule
newListTargetsByRule pRule_ =
  ListTargetsByRule'
    { eventBusName = Prelude.Nothing,
      limit = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      rule = pRule_
    }

-- | The name or ARN of the event bus associated with the rule. If you omit
-- this, the default event bus is used.
listTargetsByRule_eventBusName :: Lens.Lens' ListTargetsByRule (Prelude.Maybe Prelude.Text)
listTargetsByRule_eventBusName = Lens.lens (\ListTargetsByRule' {eventBusName} -> eventBusName) (\s@ListTargetsByRule' {} a -> s {eventBusName = a} :: ListTargetsByRule)

-- | The maximum number of results to return.
listTargetsByRule_limit :: Lens.Lens' ListTargetsByRule (Prelude.Maybe Prelude.Natural)
listTargetsByRule_limit = Lens.lens (\ListTargetsByRule' {limit} -> limit) (\s@ListTargetsByRule' {} a -> s {limit = a} :: ListTargetsByRule)

-- | The token returned by a previous call to retrieve the next set of
-- results.
listTargetsByRule_nextToken :: Lens.Lens' ListTargetsByRule (Prelude.Maybe Prelude.Text)
listTargetsByRule_nextToken = Lens.lens (\ListTargetsByRule' {nextToken} -> nextToken) (\s@ListTargetsByRule' {} a -> s {nextToken = a} :: ListTargetsByRule)

-- | The name of the rule.
listTargetsByRule_rule :: Lens.Lens' ListTargetsByRule Prelude.Text
listTargetsByRule_rule = Lens.lens (\ListTargetsByRule' {rule} -> rule) (\s@ListTargetsByRule' {} a -> s {rule = a} :: ListTargetsByRule)

instance Core.AWSPager ListTargetsByRule where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listTargetsByRuleResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listTargetsByRuleResponse_targets
            Prelude.. Lens._Just
            Prelude.. Lens.to Prelude.toList
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listTargetsByRule_nextToken
          Lens..~ rs
          Lens.^? listTargetsByRuleResponse_nextToken
          Prelude.. Lens._Just

instance Core.AWSRequest ListTargetsByRule where
  type
    AWSResponse ListTargetsByRule =
      ListTargetsByRuleResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          ListTargetsByRuleResponse'
            Prelude.<$> (x Data..?> "NextToken")
            Prelude.<*> (x Data..?> "Targets")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable ListTargetsByRule where
  hashWithSalt _salt ListTargetsByRule' {..} =
    _salt
      `Prelude.hashWithSalt` eventBusName
      `Prelude.hashWithSalt` limit
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` rule

instance Prelude.NFData ListTargetsByRule where
  rnf ListTargetsByRule' {..} =
    Prelude.rnf eventBusName
      `Prelude.seq` Prelude.rnf limit
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf rule

instance Data.ToHeaders ListTargetsByRule where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "AWSEvents.ListTargetsByRule" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON ListTargetsByRule where
  toJSON ListTargetsByRule' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("EventBusName" Data..=) Prelude.<$> eventBusName,
            ("Limit" Data..=) Prelude.<$> limit,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            Prelude.Just ("Rule" Data..= rule)
          ]
      )

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

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

-- | /See:/ 'newListTargetsByRuleResponse' smart constructor.
data ListTargetsByRuleResponse = ListTargetsByRuleResponse'
  { -- | Indicates whether there are additional results to retrieve. If there are
    -- no more results, the value is null.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The targets assigned to the rule.
    targets :: Prelude.Maybe (Prelude.NonEmpty Target),
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListTargetsByRuleResponse' 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', 'listTargetsByRuleResponse_nextToken' - Indicates whether there are additional results to retrieve. If there are
-- no more results, the value is null.
--
-- 'targets', 'listTargetsByRuleResponse_targets' - The targets assigned to the rule.
--
-- 'httpStatus', 'listTargetsByRuleResponse_httpStatus' - The response's http status code.
newListTargetsByRuleResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListTargetsByRuleResponse
newListTargetsByRuleResponse pHttpStatus_ =
  ListTargetsByRuleResponse'
    { nextToken =
        Prelude.Nothing,
      targets = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | Indicates whether there are additional results to retrieve. If there are
-- no more results, the value is null.
listTargetsByRuleResponse_nextToken :: Lens.Lens' ListTargetsByRuleResponse (Prelude.Maybe Prelude.Text)
listTargetsByRuleResponse_nextToken = Lens.lens (\ListTargetsByRuleResponse' {nextToken} -> nextToken) (\s@ListTargetsByRuleResponse' {} a -> s {nextToken = a} :: ListTargetsByRuleResponse)

-- | The targets assigned to the rule.
listTargetsByRuleResponse_targets :: Lens.Lens' ListTargetsByRuleResponse (Prelude.Maybe (Prelude.NonEmpty Target))
listTargetsByRuleResponse_targets = Lens.lens (\ListTargetsByRuleResponse' {targets} -> targets) (\s@ListTargetsByRuleResponse' {} a -> s {targets = a} :: ListTargetsByRuleResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData ListTargetsByRuleResponse where
  rnf ListTargetsByRuleResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf targets
      `Prelude.seq` Prelude.rnf httpStatus