{-# 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.DMS.DescribeEvents
-- 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 events for a given source identifier and source type. You can also
-- specify a start and end time. For more information on DMS events, see
-- <https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Events.html Working with Events and Notifications>
-- in the /Database Migration Service User Guide./
--
-- This operation returns paginated results.
module Amazonka.DMS.DescribeEvents
  ( -- * Creating a Request
    DescribeEvents (..),
    newDescribeEvents,

    -- * Request Lenses
    describeEvents_duration,
    describeEvents_endTime,
    describeEvents_eventCategories,
    describeEvents_filters,
    describeEvents_marker,
    describeEvents_maxRecords,
    describeEvents_sourceIdentifier,
    describeEvents_sourceType,
    describeEvents_startTime,

    -- * Destructuring the Response
    DescribeEventsResponse (..),
    newDescribeEventsResponse,

    -- * Response Lenses
    describeEventsResponse_events,
    describeEventsResponse_marker,
    describeEventsResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import Amazonka.DMS.Types
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:/ 'newDescribeEvents' smart constructor.
data DescribeEvents = DescribeEvents'
  { -- | The duration of the events to be listed.
    duration :: Prelude.Maybe Prelude.Int,
    -- | The end time for the events to be listed.
    endTime :: Prelude.Maybe Data.POSIX,
    -- | A list of event categories for the source type that you\'ve chosen.
    eventCategories :: Prelude.Maybe [Prelude.Text],
    -- | Filters applied to events. The only valid filter is
    -- @replication-instance-id@.
    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
    -- called a 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 identifier of an event source.
    sourceIdentifier :: Prelude.Maybe Prelude.Text,
    -- | The type of DMS resource that generates events.
    --
    -- Valid values: replication-instance | replication-task
    sourceType :: Prelude.Maybe SourceType,
    -- | The start time for the events to be listed.
    startTime :: Prelude.Maybe Data.POSIX
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeEvents' 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:
--
-- 'duration', 'describeEvents_duration' - The duration of the events to be listed.
--
-- 'endTime', 'describeEvents_endTime' - The end time for the events to be listed.
--
-- 'eventCategories', 'describeEvents_eventCategories' - A list of event categories for the source type that you\'ve chosen.
--
-- 'filters', 'describeEvents_filters' - Filters applied to events. The only valid filter is
-- @replication-instance-id@.
--
-- 'marker', 'describeEvents_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', 'describeEvents_maxRecords' - The maximum number of records to include in the response. If more
-- records exist than the specified @MaxRecords@ value, a pagination token
-- called a marker is included in the response so that the remaining
-- results can be retrieved.
--
-- Default: 100
--
-- Constraints: Minimum 20, maximum 100.
--
-- 'sourceIdentifier', 'describeEvents_sourceIdentifier' - The identifier of an event source.
--
-- 'sourceType', 'describeEvents_sourceType' - The type of DMS resource that generates events.
--
-- Valid values: replication-instance | replication-task
--
-- 'startTime', 'describeEvents_startTime' - The start time for the events to be listed.
newDescribeEvents ::
  DescribeEvents
newDescribeEvents =
  DescribeEvents'
    { duration = Prelude.Nothing,
      endTime = Prelude.Nothing,
      eventCategories = Prelude.Nothing,
      filters = Prelude.Nothing,
      marker = Prelude.Nothing,
      maxRecords = Prelude.Nothing,
      sourceIdentifier = Prelude.Nothing,
      sourceType = Prelude.Nothing,
      startTime = Prelude.Nothing
    }

-- | The duration of the events to be listed.
describeEvents_duration :: Lens.Lens' DescribeEvents (Prelude.Maybe Prelude.Int)
describeEvents_duration = Lens.lens (\DescribeEvents' {duration} -> duration) (\s@DescribeEvents' {} a -> s {duration = a} :: DescribeEvents)

-- | The end time for the events to be listed.
describeEvents_endTime :: Lens.Lens' DescribeEvents (Prelude.Maybe Prelude.UTCTime)
describeEvents_endTime = Lens.lens (\DescribeEvents' {endTime} -> endTime) (\s@DescribeEvents' {} a -> s {endTime = a} :: DescribeEvents) Prelude.. Lens.mapping Data._Time

-- | A list of event categories for the source type that you\'ve chosen.
describeEvents_eventCategories :: Lens.Lens' DescribeEvents (Prelude.Maybe [Prelude.Text])
describeEvents_eventCategories = Lens.lens (\DescribeEvents' {eventCategories} -> eventCategories) (\s@DescribeEvents' {} a -> s {eventCategories = a} :: DescribeEvents) Prelude.. Lens.mapping Lens.coerced

-- | Filters applied to events. The only valid filter is
-- @replication-instance-id@.
describeEvents_filters :: Lens.Lens' DescribeEvents (Prelude.Maybe [Filter])
describeEvents_filters = Lens.lens (\DescribeEvents' {filters} -> filters) (\s@DescribeEvents' {} a -> s {filters = a} :: DescribeEvents) 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@.
describeEvents_marker :: Lens.Lens' DescribeEvents (Prelude.Maybe Prelude.Text)
describeEvents_marker = Lens.lens (\DescribeEvents' {marker} -> marker) (\s@DescribeEvents' {} a -> s {marker = a} :: DescribeEvents)

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

-- | The identifier of an event source.
describeEvents_sourceIdentifier :: Lens.Lens' DescribeEvents (Prelude.Maybe Prelude.Text)
describeEvents_sourceIdentifier = Lens.lens (\DescribeEvents' {sourceIdentifier} -> sourceIdentifier) (\s@DescribeEvents' {} a -> s {sourceIdentifier = a} :: DescribeEvents)

-- | The type of DMS resource that generates events.
--
-- Valid values: replication-instance | replication-task
describeEvents_sourceType :: Lens.Lens' DescribeEvents (Prelude.Maybe SourceType)
describeEvents_sourceType = Lens.lens (\DescribeEvents' {sourceType} -> sourceType) (\s@DescribeEvents' {} a -> s {sourceType = a} :: DescribeEvents)

-- | The start time for the events to be listed.
describeEvents_startTime :: Lens.Lens' DescribeEvents (Prelude.Maybe Prelude.UTCTime)
describeEvents_startTime = Lens.lens (\DescribeEvents' {startTime} -> startTime) (\s@DescribeEvents' {} a -> s {startTime = a} :: DescribeEvents) Prelude.. Lens.mapping Data._Time

instance Core.AWSPager DescribeEvents where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? describeEventsResponse_marker
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? describeEventsResponse_events
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& describeEvents_marker
          Lens..~ rs
          Lens.^? describeEventsResponse_marker
          Prelude.. Lens._Just

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

instance Prelude.Hashable DescribeEvents where
  hashWithSalt _salt DescribeEvents' {..} =
    _salt
      `Prelude.hashWithSalt` duration
      `Prelude.hashWithSalt` endTime
      `Prelude.hashWithSalt` eventCategories
      `Prelude.hashWithSalt` filters
      `Prelude.hashWithSalt` marker
      `Prelude.hashWithSalt` maxRecords
      `Prelude.hashWithSalt` sourceIdentifier
      `Prelude.hashWithSalt` sourceType
      `Prelude.hashWithSalt` startTime

instance Prelude.NFData DescribeEvents where
  rnf DescribeEvents' {..} =
    Prelude.rnf duration
      `Prelude.seq` Prelude.rnf endTime
      `Prelude.seq` Prelude.rnf eventCategories
      `Prelude.seq` Prelude.rnf filters
      `Prelude.seq` Prelude.rnf marker
      `Prelude.seq` Prelude.rnf maxRecords
      `Prelude.seq` Prelude.rnf sourceIdentifier
      `Prelude.seq` Prelude.rnf sourceType
      `Prelude.seq` Prelude.rnf startTime

instance Data.ToHeaders DescribeEvents where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "AmazonDMSv20160101.DescribeEvents" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON DescribeEvents where
  toJSON DescribeEvents' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("Duration" Data..=) Prelude.<$> duration,
            ("EndTime" Data..=) Prelude.<$> endTime,
            ("EventCategories" Data..=)
              Prelude.<$> eventCategories,
            ("Filters" Data..=) Prelude.<$> filters,
            ("Marker" Data..=) Prelude.<$> marker,
            ("MaxRecords" Data..=) Prelude.<$> maxRecords,
            ("SourceIdentifier" Data..=)
              Prelude.<$> sourceIdentifier,
            ("SourceType" Data..=) Prelude.<$> sourceType,
            ("StartTime" Data..=) Prelude.<$> startTime
          ]
      )

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

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

-- |
--
-- /See:/ 'newDescribeEventsResponse' smart constructor.
data DescribeEventsResponse = DescribeEventsResponse'
  { -- | The events described.
    events :: Prelude.Maybe [Event],
    -- | 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 'DescribeEventsResponse' 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:
--
-- 'events', 'describeEventsResponse_events' - The events described.
--
-- 'marker', 'describeEventsResponse_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', 'describeEventsResponse_httpStatus' - The response's http status code.
newDescribeEventsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeEventsResponse
newDescribeEventsResponse pHttpStatus_ =
  DescribeEventsResponse'
    { events = Prelude.Nothing,
      marker = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The events described.
describeEventsResponse_events :: Lens.Lens' DescribeEventsResponse (Prelude.Maybe [Event])
describeEventsResponse_events = Lens.lens (\DescribeEventsResponse' {events} -> events) (\s@DescribeEventsResponse' {} a -> s {events = a} :: DescribeEventsResponse) 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@.
describeEventsResponse_marker :: Lens.Lens' DescribeEventsResponse (Prelude.Maybe Prelude.Text)
describeEventsResponse_marker = Lens.lens (\DescribeEventsResponse' {marker} -> marker) (\s@DescribeEventsResponse' {} a -> s {marker = a} :: DescribeEventsResponse)

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

instance Prelude.NFData DescribeEventsResponse where
  rnf DescribeEventsResponse' {..} =
    Prelude.rnf events
      `Prelude.seq` Prelude.rnf marker
      `Prelude.seq` Prelude.rnf httpStatus