{-# 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.GameLift.ListGameServers
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- __This operation is used with the GameLift FleetIQ solution and game
-- server groups.__
--
-- Retrieves information on all game servers that are currently active in a
-- specified game server group. You can opt to sort the list by game server
-- age. Use the pagination parameters to retrieve results in a set of
-- sequential segments.
--
-- __Learn more__
--
-- <https://docs.aws.amazon.com/gamelift/latest/fleetiqguide/gsg-intro.html GameLift FleetIQ Guide>
--
-- This operation returns paginated results.
module Amazonka.GameLift.ListGameServers
  ( -- * Creating a Request
    ListGameServers (..),
    newListGameServers,

    -- * Request Lenses
    listGameServers_limit,
    listGameServers_nextToken,
    listGameServers_sortOrder,
    listGameServers_gameServerGroupName,

    -- * Destructuring the Response
    ListGameServersResponse (..),
    newListGameServersResponse,

    -- * Response Lenses
    listGameServersResponse_gameServers,
    listGameServersResponse_nextToken,
    listGameServersResponse_httpStatus,
  )
where

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

-- | /See:/ 'newListGameServers' smart constructor.
data ListGameServers = ListGameServers'
  { -- | The maximum number of results to return. Use this parameter with
    -- @NextToken@ to get results as a set of sequential pages.
    limit :: Prelude.Maybe Prelude.Natural,
    -- | A token that indicates the start of the next sequential page of results.
    -- Use the token that is returned with a previous call to this operation.
    -- To start at the beginning of the result set, do not specify a value.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | Indicates how to sort the returned data based on game server
    -- registration timestamp. Use @ASCENDING@ to retrieve oldest game servers
    -- first, or use @DESCENDING@ to retrieve newest game servers first. If
    -- this parameter is left empty, game servers are returned in no particular
    -- order.
    sortOrder :: Prelude.Maybe SortOrder,
    -- | An identifier for the game server group to retrieve a list of game
    -- servers from. Use either the name or ARN value.
    gameServerGroupName :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListGameServers' 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:
--
-- 'limit', 'listGameServers_limit' - The maximum number of results to return. Use this parameter with
-- @NextToken@ to get results as a set of sequential pages.
--
-- 'nextToken', 'listGameServers_nextToken' - A token that indicates the start of the next sequential page of results.
-- Use the token that is returned with a previous call to this operation.
-- To start at the beginning of the result set, do not specify a value.
--
-- 'sortOrder', 'listGameServers_sortOrder' - Indicates how to sort the returned data based on game server
-- registration timestamp. Use @ASCENDING@ to retrieve oldest game servers
-- first, or use @DESCENDING@ to retrieve newest game servers first. If
-- this parameter is left empty, game servers are returned in no particular
-- order.
--
-- 'gameServerGroupName', 'listGameServers_gameServerGroupName' - An identifier for the game server group to retrieve a list of game
-- servers from. Use either the name or ARN value.
newListGameServers ::
  -- | 'gameServerGroupName'
  Prelude.Text ->
  ListGameServers
newListGameServers pGameServerGroupName_ =
  ListGameServers'
    { limit = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      sortOrder = Prelude.Nothing,
      gameServerGroupName = pGameServerGroupName_
    }

-- | The maximum number of results to return. Use this parameter with
-- @NextToken@ to get results as a set of sequential pages.
listGameServers_limit :: Lens.Lens' ListGameServers (Prelude.Maybe Prelude.Natural)
listGameServers_limit = Lens.lens (\ListGameServers' {limit} -> limit) (\s@ListGameServers' {} a -> s {limit = a} :: ListGameServers)

-- | A token that indicates the start of the next sequential page of results.
-- Use the token that is returned with a previous call to this operation.
-- To start at the beginning of the result set, do not specify a value.
listGameServers_nextToken :: Lens.Lens' ListGameServers (Prelude.Maybe Prelude.Text)
listGameServers_nextToken = Lens.lens (\ListGameServers' {nextToken} -> nextToken) (\s@ListGameServers' {} a -> s {nextToken = a} :: ListGameServers)

-- | Indicates how to sort the returned data based on game server
-- registration timestamp. Use @ASCENDING@ to retrieve oldest game servers
-- first, or use @DESCENDING@ to retrieve newest game servers first. If
-- this parameter is left empty, game servers are returned in no particular
-- order.
listGameServers_sortOrder :: Lens.Lens' ListGameServers (Prelude.Maybe SortOrder)
listGameServers_sortOrder = Lens.lens (\ListGameServers' {sortOrder} -> sortOrder) (\s@ListGameServers' {} a -> s {sortOrder = a} :: ListGameServers)

-- | An identifier for the game server group to retrieve a list of game
-- servers from. Use either the name or ARN value.
listGameServers_gameServerGroupName :: Lens.Lens' ListGameServers Prelude.Text
listGameServers_gameServerGroupName = Lens.lens (\ListGameServers' {gameServerGroupName} -> gameServerGroupName) (\s@ListGameServers' {} a -> s {gameServerGroupName = a} :: ListGameServers)

instance Core.AWSPager ListGameServers where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listGameServersResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listGameServersResponse_gameServers
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listGameServers_nextToken
          Lens..~ rs
          Lens.^? listGameServersResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable ListGameServers where
  hashWithSalt _salt ListGameServers' {..} =
    _salt
      `Prelude.hashWithSalt` limit
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` sortOrder
      `Prelude.hashWithSalt` gameServerGroupName

instance Prelude.NFData ListGameServers where
  rnf ListGameServers' {..} =
    Prelude.rnf limit
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf sortOrder
      `Prelude.seq` Prelude.rnf gameServerGroupName

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

instance Data.ToJSON ListGameServers where
  toJSON ListGameServers' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("Limit" Data..=) Prelude.<$> limit,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            ("SortOrder" Data..=) Prelude.<$> sortOrder,
            Prelude.Just
              ("GameServerGroupName" Data..= gameServerGroupName)
          ]
      )

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

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

-- | /See:/ 'newListGameServersResponse' smart constructor.
data ListGameServersResponse = ListGameServersResponse'
  { -- | A collection of game server objects that match the request.
    gameServers :: Prelude.Maybe [GameServer],
    -- | A token that indicates where to resume retrieving results on the next
    -- call to this operation. If no token is returned, these results represent
    -- the end of the list.
    nextToken :: 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 'ListGameServersResponse' 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:
--
-- 'gameServers', 'listGameServersResponse_gameServers' - A collection of game server objects that match the request.
--
-- 'nextToken', 'listGameServersResponse_nextToken' - A token that indicates where to resume retrieving results on the next
-- call to this operation. If no token is returned, these results represent
-- the end of the list.
--
-- 'httpStatus', 'listGameServersResponse_httpStatus' - The response's http status code.
newListGameServersResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListGameServersResponse
newListGameServersResponse pHttpStatus_ =
  ListGameServersResponse'
    { gameServers =
        Prelude.Nothing,
      nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A collection of game server objects that match the request.
listGameServersResponse_gameServers :: Lens.Lens' ListGameServersResponse (Prelude.Maybe [GameServer])
listGameServersResponse_gameServers = Lens.lens (\ListGameServersResponse' {gameServers} -> gameServers) (\s@ListGameServersResponse' {} a -> s {gameServers = a} :: ListGameServersResponse) Prelude.. Lens.mapping Lens.coerced

-- | A token that indicates where to resume retrieving results on the next
-- call to this operation. If no token is returned, these results represent
-- the end of the list.
listGameServersResponse_nextToken :: Lens.Lens' ListGameServersResponse (Prelude.Maybe Prelude.Text)
listGameServersResponse_nextToken = Lens.lens (\ListGameServersResponse' {nextToken} -> nextToken) (\s@ListGameServersResponse' {} a -> s {nextToken = a} :: ListGameServersResponse)

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

instance Prelude.NFData ListGameServersResponse where
  rnf ListGameServersResponse' {..} =
    Prelude.rnf gameServers
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus