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<?php

/**

* Copyright 2015 Google Inc. All Rights Reserved.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

use Silex\Application;

use Silex\Provider\TwigServiceProvider;

use Symfony\Component\HttpFoundation\JsonResponse;

use Symfony\Component\HttpFoundation\Response;

use Google\Cloud\Samples\Pubsub\DatastoreHelper;

// composer autoloading

require_once __DIR__ . '/../vendor/autoload.php';

$app = new Application();

$app->register(new TwigServiceProvider());

$app['twig.path'] = [ __DIR__ . '/../templates' ];

$app['project_id'] = getenv('GOOGLE_PROJECT_NAME');

$app['topic'] = getenv('TOPIC_NAME') ?: 'php-pubsub-example';

// Authenticate your API Client

$client = new Google_Client();

$client->useApplicationDefaultCredentials();

$client->addScope(Google_Service_Pubsub::PUBSUB);

$client->addScope(Google_Service_Datastore::DATASTORE);

$client->addScope(Google_Service_Datastore::USERINFO_EMAIL);

$app['google_client'] = $client;

$app->get('/', function () use ($app) {

return $app['twig']->render('pubsub.html.twig', [

'project_id' => $app['project_id'],

]);

});

$app->get('/fetch_messages', function () use ($app) {

/** @var Google_Client $client */

$client = $app['google_client'];

$projectId = $app['project_id'];

// Retrieve all messages from datastore

// For a more complete demo of datastore,

// @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/datastore

$datastore = new DatastoreHelper($client, $projectId);

$messages = $datastore->fetchMessages();

return new JsonResponse($messages);

});

$app->post('/receive_message', function () use ($app) {

/** @var Google_Client $client */

$client = $app['google_client'];

$projectId = $app['project_id'];

// pull the message from the post body

$json = $app['request']->getContent();

$request = json_decode($json, true);

if (!isset($request['message']['data']) || !$message = base64_decode($request['message']['data'])) {

return new Response('', 400);

}

// Store the received message in datastore

// For a more complete demo of datastore,

// @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/datastore

$datastore = new DatastoreHelper($client, $projectId);

$datastore->storeMessage($message);

return new Response();

});

$app->post('/send_message', function () use ($app) {

// send the pubsub message

if ($messageText = $app['request']->get('message')) {

/** @var Google_Client $client */

$client = $app['google_client'];

$projectName = sprintf('projects/%s', $app['project_id']);

$topicName = sprintf('%s/topics/%s', $projectName, $app['topic']);

$pubsub = new Google_Service_Pubsub($client);

// create pubsub message object

$message = new Google_Service_Pubsub_PubsubMessage();

$message->setData(base64_encode($messageText));

// create pubsub request

$request = new Google_Service_Pubsub_PublishRequest();

$request->setMessages([$message]);

$pubsub->projects_topics->publish($topicName, $request);

return new Response('', 204);

}

return new Response('', 400);

});

return $app;