{-# 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.DocumentDB.DescribeEventSubscriptions
-- 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 all the subscription descriptions for a customer account. The
-- description for a subscription includes @SubscriptionName@,
-- @SNSTopicARN@, @CustomerID@, @SourceType@, @SourceID@, @CreationTime@,
-- and @Status@.
--
-- If you specify a @SubscriptionName@, lists the description for that
-- subscription.
--
-- This operation returns paginated results.
module Amazonka.DocumentDB.DescribeEventSubscriptions
  ( -- * Creating a Request
    DescribeEventSubscriptions (..),
    newDescribeEventSubscriptions,

    -- * Request Lenses
    describeEventSubscriptions_filters,
    describeEventSubscriptions_marker,
    describeEventSubscriptions_maxRecords,
    describeEventSubscriptions_subscriptionName,

    -- * Destructuring the Response
    DescribeEventSubscriptionsResponse (..),
    newDescribeEventSubscriptionsResponse,

    -- * Response Lenses
    describeEventSubscriptionsResponse_eventSubscriptionsList,
    describeEventSubscriptionsResponse_marker,
    describeEventSubscriptionsResponse_httpStatus,
  )
where

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

-- | Represents the input to DescribeEventSubscriptions.
--
-- /See:/ 'newDescribeEventSubscriptions' smart constructor.
data DescribeEventSubscriptions = DescribeEventSubscriptions'
  { -- | This parameter is not currently supported.
    filters :: Prelude.Maybe [Filter],
    -- | An optional pagination token provided by a previous request. If this
    -- parameter is specified, the response includes only records beyond the
    -- marker, up to the value specified by @MaxRecords@.
    marker :: Prelude.Maybe Prelude.Text,
    -- | The maximum number of records to include in the response. If more
    -- records exist than the specified @MaxRecords@ value, a pagination token
    -- (marker) is included in the response so that the remaining results can
    -- be retrieved.
    --
    -- Default: 100
    --
    -- Constraints: Minimum 20, maximum 100.
    maxRecords :: Prelude.Maybe Prelude.Int,
    -- | The name of the Amazon DocumentDB event notification subscription that
    -- you want to describe.
    subscriptionName :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeEventSubscriptions' 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:
--
-- 'filters', 'describeEventSubscriptions_filters' - This parameter is not currently supported.
--
-- 'marker', 'describeEventSubscriptions_marker' - An optional pagination token provided by a previous request. If this
-- parameter is specified, the response includes only records beyond the
-- marker, up to the value specified by @MaxRecords@.
--
-- 'maxRecords', 'describeEventSubscriptions_maxRecords' - The maximum number of records to include in the response. If more
-- records exist than the specified @MaxRecords@ value, a pagination token
-- (marker) is included in the response so that the remaining results can
-- be retrieved.
--
-- Default: 100
--
-- Constraints: Minimum 20, maximum 100.
--
-- 'subscriptionName', 'describeEventSubscriptions_subscriptionName' - The name of the Amazon DocumentDB event notification subscription that
-- you want to describe.
newDescribeEventSubscriptions ::
  DescribeEventSubscriptions
newDescribeEventSubscriptions =
  DescribeEventSubscriptions'
    { filters =
        Prelude.Nothing,
      marker = Prelude.Nothing,
      maxRecords = Prelude.Nothing,
      subscriptionName = Prelude.Nothing
    }

-- | This parameter is not currently supported.
describeEventSubscriptions_filters :: Lens.Lens' DescribeEventSubscriptions (Prelude.Maybe [Filter])
describeEventSubscriptions_filters = Lens.lens (\DescribeEventSubscriptions' {filters} -> filters) (\s@DescribeEventSubscriptions' {} a -> s {filters = a} :: DescribeEventSubscriptions) Prelude.. Lens.mapping Lens.coerced

-- | An optional pagination token provided by a previous request. If this
-- parameter is specified, the response includes only records beyond the
-- marker, up to the value specified by @MaxRecords@.
describeEventSubscriptions_marker :: Lens.Lens' DescribeEventSubscriptions (Prelude.Maybe Prelude.Text)
describeEventSubscriptions_marker = Lens.lens (\DescribeEventSubscriptions' {marker} -> marker) (\s@DescribeEventSubscriptions' {} a -> s {marker = a} :: DescribeEventSubscriptions)

-- | The maximum number of records to include in the response. If more
-- records exist than the specified @MaxRecords@ value, a pagination token
-- (marker) is included in the response so that the remaining results can
-- be retrieved.
--
-- Default: 100
--
-- Constraints: Minimum 20, maximum 100.
describeEventSubscriptions_maxRecords :: Lens.Lens' DescribeEventSubscriptions (Prelude.Maybe Prelude.Int)
describeEventSubscriptions_maxRecords = Lens.lens (\DescribeEventSubscriptions' {maxRecords} -> maxRecords) (\s@DescribeEventSubscriptions' {} a -> s {maxRecords = a} :: DescribeEventSubscriptions)

-- | The name of the Amazon DocumentDB event notification subscription that
-- you want to describe.
describeEventSubscriptions_subscriptionName :: Lens.Lens' DescribeEventSubscriptions (Prelude.Maybe Prelude.Text)
describeEventSubscriptions_subscriptionName = Lens.lens (\DescribeEventSubscriptions' {subscriptionName} -> subscriptionName) (\s@DescribeEventSubscriptions' {} a -> s {subscriptionName = a} :: DescribeEventSubscriptions)

instance Core.AWSPager DescribeEventSubscriptions where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeEventSubscriptionsResponse_marker
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeEventSubscriptionsResponse_eventSubscriptionsList
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeEventSubscriptions_marker
          Lens..~ rs
          Lens.^? describeEventSubscriptionsResponse_marker
          Prelude.. Lens._Just

instance Core.AWSRequest DescribeEventSubscriptions where
  type
    AWSResponse DescribeEventSubscriptions =
      DescribeEventSubscriptionsResponse
  request overrides =
    Request.postQuery (overrides defaultService)
  response =
    Response.receiveXMLWrapper
      "DescribeEventSubscriptionsResult"
      ( \s h x ->
          DescribeEventSubscriptionsResponse'
            Prelude.<$> ( x
                            Data..@? "EventSubscriptionsList"
                            Core..!@ Prelude.mempty
                            Prelude.>>= Core.may (Data.parseXMLList "EventSubscription")
                        )
            Prelude.<*> (x Data..@? "Marker")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable DescribeEventSubscriptions where
  hashWithSalt _salt DescribeEventSubscriptions' {..} =
    _salt
      `Prelude.hashWithSalt` filters
      `Prelude.hashWithSalt` marker
      `Prelude.hashWithSalt` maxRecords
      `Prelude.hashWithSalt` subscriptionName

instance Prelude.NFData DescribeEventSubscriptions where
  rnf DescribeEventSubscriptions' {..} =
    Prelude.rnf filters
      `Prelude.seq` Prelude.rnf marker
      `Prelude.seq` Prelude.rnf maxRecords
      `Prelude.seq` Prelude.rnf subscriptionName

instance Data.ToHeaders DescribeEventSubscriptions where
  toHeaders = Prelude.const Prelude.mempty

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

instance Data.ToQuery DescribeEventSubscriptions where
  toQuery DescribeEventSubscriptions' {..} =
    Prelude.mconcat
      [ "Action"
          Data.=: ("DescribeEventSubscriptions" :: Prelude.ByteString),
        "Version"
          Data.=: ("2014-10-31" :: Prelude.ByteString),
        "Filters"
          Data.=: Data.toQuery
            (Data.toQueryList "Filter" Prelude.<$> filters),
        "Marker" Data.=: marker,
        "MaxRecords" Data.=: maxRecords,
        "SubscriptionName" Data.=: subscriptionName
      ]

-- | Represents the output of DescribeEventSubscriptions.
--
-- /See:/ 'newDescribeEventSubscriptionsResponse' smart constructor.
data DescribeEventSubscriptionsResponse = DescribeEventSubscriptionsResponse'
  { -- | A list of event subscriptions.
    eventSubscriptionsList :: Prelude.Maybe [EventSubscription],
    -- | An optional pagination token provided by a previous request. If this
    -- parameter is specified, the response includes only records beyond the
    -- marker, up to the value specified by @MaxRecords@.
    marker :: 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 'DescribeEventSubscriptionsResponse' 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:
--
-- 'eventSubscriptionsList', 'describeEventSubscriptionsResponse_eventSubscriptionsList' - A list of event subscriptions.
--
-- 'marker', 'describeEventSubscriptionsResponse_marker' - An optional pagination token provided by a previous request. If this
-- parameter is specified, the response includes only records beyond the
-- marker, up to the value specified by @MaxRecords@.
--
-- 'httpStatus', 'describeEventSubscriptionsResponse_httpStatus' - The response's http status code.
newDescribeEventSubscriptionsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeEventSubscriptionsResponse
newDescribeEventSubscriptionsResponse pHttpStatus_ =
  DescribeEventSubscriptionsResponse'
    { eventSubscriptionsList =
        Prelude.Nothing,
      marker = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A list of event subscriptions.
describeEventSubscriptionsResponse_eventSubscriptionsList :: Lens.Lens' DescribeEventSubscriptionsResponse (Prelude.Maybe [EventSubscription])
describeEventSubscriptionsResponse_eventSubscriptionsList = Lens.lens (\DescribeEventSubscriptionsResponse' {eventSubscriptionsList} -> eventSubscriptionsList) (\s@DescribeEventSubscriptionsResponse' {} a -> s {eventSubscriptionsList = a} :: DescribeEventSubscriptionsResponse) Prelude.. Lens.mapping Lens.coerced

-- | An optional pagination token provided by a previous request. If this
-- parameter is specified, the response includes only records beyond the
-- marker, up to the value specified by @MaxRecords@.
describeEventSubscriptionsResponse_marker :: Lens.Lens' DescribeEventSubscriptionsResponse (Prelude.Maybe Prelude.Text)
describeEventSubscriptionsResponse_marker = Lens.lens (\DescribeEventSubscriptionsResponse' {marker} -> marker) (\s@DescribeEventSubscriptionsResponse' {} a -> s {marker = a} :: DescribeEventSubscriptionsResponse)

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

instance
  Prelude.NFData
    DescribeEventSubscriptionsResponse
  where
  rnf DescribeEventSubscriptionsResponse' {..} =
    Prelude.rnf eventSubscriptionsList
      `Prelude.seq` Prelude.rnf marker
      `Prelude.seq` Prelude.rnf httpStatus