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<?php

/**

* Copyright 2016 Google Inc.

*

* 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.

*/

namespace Google\Cloud\Samples\PubSub;

use Silex\Application;

use Silex\Provider\TwigServiceProvider;

use Symfony\Component\HttpFoundation\JsonResponse;

use Symfony\Component\HttpFoundation\Response;

use Google\Cloud\PubSub\PubSubClient;

use Google\Cloud\Datastore\DatastoreClient;

$app = new Application();

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

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

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

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

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

]);

});

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

// get PUSH pubsub messages

$projectId = $app['project_id'];

$subscriptionName = $app['subscription'];

$datastore = $app['datastore'];

$query = $datastore->query()->kind('PubSubPushMessage');

$messages = [];

$pushKeys = [];

foreach ($datastore->runQuery($query) as $pushMessage) {

$pushKeys[] = $pushMessage->key();

$messages[] = $pushMessage['message'];

}

// delete PUSH messages

if ($pushKeys) {

$datastore->deleteBatch($pushKeys);

}

# [START pull]

// get PULL pubsub messages

$pubsub = new PubSubClient([

'projectId' => $projectId,

]);

$subscription = $pubsub->subscription($subscriptionName);

$pullMessages = [];

foreach ($subscription->pull(['returnImmediately' => true]) as $pullMessage) {

$pullMessages[] = $pullMessage;

$messages[] = $pullMessage->data();

}

// acknowledge PULL messages

if ($pullMessages) {

$subscription->acknowledgeBatch($pullMessages);

}

# [END pull]

return new JsonResponse($messages);

});

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

# [START receive]

// 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);

}

# [END receive]

// store the push message in datastore

$datastore = $app['datastore'];

$message = $datastore->entity('PubSubPushMessage', [

'message' => $message

]);

$datastore->insert($message);

return new Response();

});

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

$projectId = $app['project_id'];

$topicName = $app['topic'];

# [START send]

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

// Publish the pubsub message to the topic

$pubsub = new PubSubClient([

'projectId' => $projectId,

]);

$topic = $pubsub->topic($topicName);

$response = $topic->publish(['data' => $message]);

return new Response('', 204);

}

# [END send]

return new Response('', 400);

});

$app['datastore'] = function () use ($app) {

return new DatastoreClient([

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

]);

};

return $app;