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<?php
/*
* Copyright 2018, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace Google\ApiCore\Middleware;
use Google\ApiCore\Call;
use Google\ApiCore\Page;
use Google\ApiCore\PagedListResponse;
use Google\ApiCore\PageStreamingDescriptor;
use Google\Protobuf\Internal\Message;
/**
* Middleware which wraps the response in an PagedListResponses object.
*/
class PagedMiddleware
{
/** @var callable */
private $nextHandler;
/** @var PageStreamingDescriptor */
private $descriptor;
/**
* @param callable $nextHandler
* @param PageStreamingDescriptor $descriptor
*/
public function __construct(
callable $nextHandler,
PageStreamingDescriptor $descriptor
) {
$this->nextHandler = $nextHandler;
$this->descriptor = $descriptor;
}
public function __invoke(Call $call, array $options)
{
$next = $this->nextHandler;
$descriptor = $this->descriptor;
return $next($call, $options)->then(
function (Message $response) use ($call, $next, $options, $descriptor) {
$page = new Page(
$call,
$options,
$next,
$descriptor,
$response
);
return new PagedListResponse($page);
}
);
}
}