[Notifier] Add mercure bridge

composer.json

@@ -130,6 +130,7 @@
         "psr/http-client": "^1.0",
         "psr/simple-cache": "^1.0",
         "egulias/email-validator": "^2.1.10",
+        "symfony/mercure-bundle": "^0.2",
         "symfony/phpunit-bridge": "^5.2",
         "symfony/security-acl": "~2.8|~3.0",
         "phpdocumentor/reflection-docblock": "^3.0|^4.0|^5.0",

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -25,6 +25,7 @@ use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Bundle\FrameworkBundle\Routing\AnnotatedRouteControllerLoader;
 use Symfony\Bundle\FrameworkBundle\Routing\RouteLoaderInterface;
 use Symfony\Bundle\FullStack;
+use Symfony\Bundle\MercureBundle\MercureBundle;
 use Symfony\Component\Asset\PackageInterface;
 use Symfony\Component\BrowserKit\AbstractBrowser;
 use Symfony\Component\Cache\Adapter\AdapterInterface;
@@ -43,6 +44,8 @@ use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\Argument\ServiceLocatorArgument;
+use Symfony\Component\DependencyInjection\Argument\TaggedIteratorArgument;
 use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\Compiler\ServiceLocatorTagPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -112,6 +115,7 @@ use Symfony\Component\Notifier\Bridge\Infobip\InfobipTransportFactory;
 use Symfony\Component\Notifier\Bridge\Iqsms\IqsmsTransportFactory;
 use Symfony\Component\Notifier\Bridge\LinkedIn\LinkedInTransportFactory;
 use Symfony\Component\Notifier\Bridge\Mattermost\MattermostTransportFactory;
+use Symfony\Component\Notifier\Bridge\Mercure\MercureTransportFactory;
 use Symfony\Component\Notifier\Bridge\Mobyt\MobytTransportFactory;
 use Symfony\Component\Notifier\Bridge\Nexmo\NexmoTransportFactory;
 use Symfony\Component\Notifier\Bridge\Octopush\OctopushTransportFactory;
@@ -2242,6 +2246,7 @@ class FrameworkExtension extends Extension
             LinkedInTransportFactory::class => 'notifier.transport_factory.linkedin',
             GatewayApiTransportFactory::class => 'notifier.transport_factory.gatewayapi',
             OctopushTransportFactory::class => 'notifier.transport_factory.octopush',
+            MercureTransportFactory::class => 'notifier.transport_factory.mercure',
         ];
 
         foreach ($classToServices as $class => $service) {
@@ -2250,6 +2255,15 @@ class FrameworkExtension extends Extension
             }
         }
 
+        if (class_exists(MercureTransportFactory::class)) {
+            if (!class_exists(MercureBundle::class)) {
+                throw new \LogicException('The MercureBundle is not registered in your application. Try running "composer require symfony/mercure-bundle".');
+            }
+
+            $container->getDefinition($classToServices[MercureTransportFactory::class])
+                ->replaceArgument('$publisherLocator', new ServiceLocatorArgument(new TaggedIteratorArgument('mercure.publisher', null, null, true)));
+        }
+
         if (isset($config['admin_recipients'])) {
             $notifier = $container->getDefinition('notifier');
             foreach ($config['admin_recipients'] as $i => $recipient) {

src/Symfony/Bundle/FrameworkBundle/Resources/config/notifier_transports.php

@@ -22,6 +22,7 @@ use Symfony\Component\Notifier\Bridge\Infobip\InfobipTransportFactory;
 use Symfony\Component\Notifier\Bridge\Iqsms\IqsmsTransportFactory;
 use Symfony\Component\Notifier\Bridge\LinkedIn\LinkedInTransportFactory;
 use Symfony\Component\Notifier\Bridge\Mattermost\MattermostTransportFactory;
+use Symfony\Component\Notifier\Bridge\Mercure\MercureTransportFactory;
 use Symfony\Component\Notifier\Bridge\Mobyt\MobytTransportFactory;
 use Symfony\Component\Notifier\Bridge\Nexmo\NexmoTransportFactory;
 use Symfony\Component\Notifier\Bridge\Octopush\OctopushTransportFactory;
@@ -135,6 +136,10 @@ return static function (ContainerConfigurator $container) {
             ->parent('notifier.transport_factory.abstract')
             ->tag('texter.transport_factory')
 
+        ->set('notifier.transport_factory.mercure', MercureTransportFactory::class)
+            ->parent('notifier.transport_factory.abstract')
+            ->tag('chatter.transport_factory')
+
         ->set('notifier.transport_factory.null', NullTransportFactory::class)
             ->parent('notifier.transport_factory.abstract')
             ->tag('chatter.transport_factory')

src/Symfony/Component/Notifier/Bridge/Mercure/.gitattributes

@@ -0,0 +1,4 @@
+/Tests export-ignore
+/phpunit.xml.dist export-ignore
+/.gitattributes export-ignore
+/.gitignore export-ignore

src/Symfony/Component/Notifier/Bridge/Mercure/CHANGELOG.md

@@ -0,0 +1,7 @@
+CHANGELOG
+=========
+
+5.3
+---
+
+ * Add the bridge

src/Symfony/Component/Notifier/Bridge/Mercure/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2021 Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

src/Symfony/Component/Notifier/Bridge/Mercure/MercureOptions.php

@@ -0,0 +1,86 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Notifier\Bridge\Mercure;
+
+use Symfony\Component\Notifier\Message\MessageOptionsInterface;
+
+/**
+ * @author Mathias Arlaud <mathias.arlaud@gmail.com>
+ */
+final class MercureOptions implements MessageOptionsInterface
+{
+    private $topics;
+    private $private;
+    private $id;
+    private $type;
+    private $retry;
+
+    /**
+     * @param string|string[]|null $topics
+     */
+    public function __construct($topics = null, bool $private = false, ?string $id = null, ?string $type = null, ?int $retry = null)
+    {
+        if (null !== $topics && !\is_array($topics) && !\is_string($topics)) {
+            throw new \TypeError(sprintf('"%s()" expects parameter 1 to be an array of strings, a string or null, "%s" given.', __METHOD__, get_debug_type($topics)));
+        }
+
+        $this->topics = null !== $topics ? (array) $topics : null;
+        $this->private = $private;
+        $this->id = $id;
+        $this->type = $type;
+        $this->retry = $retry;
+    }
+
+    /**
+     * @return string[]|null
+     */
+    public function getTopics(): ?array
+    {
+        return $this->topics;
+    }
+
+    public function isPrivate(): bool
+    {
+        return $this->private;
+    }
+
+    public function getId(): ?string
+    {
+        return $this->id;
+    }
+
+    public function getType(): ?string
+    {
+        return $this->type;
+    }
+
+    public function getRetry(): ?int
+    {
+        return $this->retry;
+    }
+
+    public function toArray(): array
+    {
+        return [
+            'topics' => $this->topics,
+            'private' => $this->private,
+            'id' => $this->id,
+            'type' => $this->type,
+            'retry' => $this->retry,
+        ];
+    }
+
+    public function getRecipientId(): ?string
+    {
+        return null;
+    }
+}

src/Symfony/Component/Notifier/Bridge/Mercure/MercureTransport.php

@@ -0,0 +1,100 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Notifier\Bridge\Mercure;
+
+use Symfony\Component\Mercure\PublisherInterface;
+use Symfony\Component\Mercure\Update;
+use Symfony\Component\Notifier\Exception\InvalidArgumentException;
+use Symfony\Component\Notifier\Exception\LogicException;
+use Symfony\Component\Notifier\Exception\TransportException;
+use Symfony\Component\Notifier\Exception\UnsupportedMessageTypeException;
+use Symfony\Component\Notifier\Message\ChatMessage;
+use Symfony\Component\Notifier\Message\MessageInterface;
+use Symfony\Component\Notifier\Message\SentMessage;
+use Symfony\Component\Notifier\Transport\AbstractTransport;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
+use Symfony\Contracts\HttpClient\Exception\ExceptionInterface;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+/**
+ * @author Mathias Arlaud <mathias.arlaud@gmail.com>
+ */
+final class MercureTransport extends AbstractTransport
+{
+    private $publisher;
+    private $publisherId;
+    private $topics;
+
+    /**
+     * @param string|string[]|null $topics
+     */
+    public function __construct(PublisherInterface $publisher, string $publisherId, $topics = null, ?HttpClientInterface $client = null, ?EventDispatcherInterface $dispatcher = null)
+    {
+        if (null !== $topics && !\is_array($topics) && !\is_string($topics)) {
+            throw new \TypeError(sprintf('"%s()" expects parameter 3 to be an array of strings, a string or null, "%s" given.', __METHOD__, get_debug_type($topics)));
+        }
+
+        $this->publisher = $publisher;
+        $this->publisherId = $publisherId;
+        $this->topics = $topics ?? 'https://symfony.com/notifier';
+
+        parent::__construct($client, $dispatcher);
+    }
+
+    public function __toString(): string
+    {
+        return sprintf('mercure://%s?%s', $this->publisherId, http_build_query(['topic' => $this->topics]));
+    }
+
+    public function supports(MessageInterface $message): bool
+    {
+        return $message instanceof ChatMessage && (null === $message->getOptions() || $message->getOptions() instanceof MercureOptions);
+    }
+
+    /**
+     * @see https://symfony.com/doc/current/mercure.html#publishing
+     */
+    protected function doSend(MessageInterface $message): SentMessage
+    {
+        if (!$message instanceof ChatMessage) {
+            throw new UnsupportedMessageTypeException(__CLASS__, ChatMessage::class, $message);
+        }
+
+        if (($options = $message->getOptions()) && !$options instanceof MercureOptions) {
+            throw new LogicException(sprintf('The "%s" transport only supports instances of "%s" for options.', __CLASS__, MercureOptions::class));
+        }
+
+        if (null === $options) {
+            $options = new MercureOptions($this->topics);
+        }
+
+        // @see https://www.w3.org/TR/activitystreams-core/#jsonld
+        $update = new Update($options->getTopics() ?? $this->topics, json_encode([
+            '@context' => 'https://www.w3.org/ns/activitystreams',
+            'type' => 'Announce',
+            'summary' => $message->getSubject(),
+        ]), $options->isPrivate(), $options->getId(), $options->getType(), $options->getRetry());
+
+        try {
+            $messageId = ($this->publisher)($update);
+
+            $sentMessage = new SentMessage($message, (string) $this);
+            $sentMessage->setMessageId($messageId);
+
+            return $sentMessage;
+        } catch (ExceptionInterface $e) {
+            throw new TransportException(sprintf('Unable to post the Mercure message: "%s".', $e->getResponse()->getContent(false)), $e->getResponse(), $e->getCode(), $e);
+        } catch (\InvalidArgumentException $e) {
+            throw new InvalidArgumentException(sprintf('Unable to post the Mercure message: "%s".', $e->getMessage()), $e->getCode(), $e);
+        }
+    }
+}

src/Symfony/Component/Notifier/Bridge/Mercure/MercureTransportFactory.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Notifier\Bridge\Mercure;
+
+use Symfony\Component\Mercure\PublisherInterface;
+use Symfony\Component\Notifier\Exception\LogicException;
+use Symfony\Component\Notifier\Exception\UnsupportedSchemeException;
+use Symfony\Component\Notifier\Transport\AbstractTransportFactory;
+use Symfony\Component\Notifier\Transport\Dsn;
+use Symfony\Component\Notifier\Transport\TransportInterface;
+use Symfony\Contracts\Service\ServiceProviderInterface;
+
+/**
+ * @author Mathias Arlaud <mathias.arlaud@gmail.com>
+ */
+final class MercureTransportFactory extends AbstractTransportFactory
+{
+    private $publisherLocator;
+
+    /**
+     * @param ServiceProviderInterface $publisherLocator A container that holds {@see PublisherInterface} instances
+     */
+    public function __construct(ServiceProviderInterface $publisherLocator)
+    {
+        parent::__construct();
+
+        $this->publisherLocator = $publisherLocator;
+    }
+
+    /**
+     * @return MercureTransport
+     */
+    public function create(Dsn $dsn): TransportInterface
+    {
+        if ('mercure' !== $dsn->getScheme()) {
+            throw new UnsupportedSchemeException($dsn, 'mercure', $this->getSupportedSchemes());
+        }
+
+        $publisherId = $dsn->getHost();
+        if (!$this->publisherLocator->has($publisherId)) {
+            throw new LogicException(sprintf('"%s" not found. Did you mean one of: %s?', $publisherId, implode(', ', array_keys($this->publisherLocator->getProvidedServices()))));
+        }
+
+        $topic = $dsn->getOption('topic');
+
+        return new MercureTransport($this->publisherLocator->get($publisherId), $publisherId, $topic);
+    }
+
+    protected function getSupportedSchemes(): array
+    {
+        return ['mercure'];
+    }
+}

src/Symfony/Component/Notifier/Bridge/Mercure/README.md

@@ -0,0 +1,23 @@
+Mercure Notifier
+================
+
+Provides [Mercure](https://github.com/symfony/mercure) integration for Symfony Notifier.
+
+DSN example
+-----------
+
+```
+MERCURE_DSN=mercure://PUBLISHER_SERVICE_ID?topic=TOPIC
+```
+
+where:
+ - `PUBLISHER_SERVICE_ID` is the Mercure publisher service id
+ - `TOPIC` is the topic IRI (optional, default: `https://symfony.com/notifier`. Could be either a single topic: `topic=https://foo` or multiple topics: `topic[]=/foo/1&topic[]=https://bar`)
+
+Resources
+---------
+
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)

src/Symfony/Component/Notifier/Bridge/Mercure/Tests/MercureOptionsTest.php

@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Notifier\Bridge\Mercure\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Notifier\Bridge\Mercure\MercureOptions;
+use TypeError;
+
+final class MercureOptionsTest extends TestCase
+{
+    public function testConstructWithDefaults()
+    {
+        $this->assertSame((new MercureOptions())->toArray(), [
+            'topics' => null,
+            'private' => false,
+            'id' => null,
+            'type' => null,
+            'retry' => null,
+        ]);
+    }
+
+    public function testConstructWithParameters()
+    {
+        $options = (new MercureOptions('/topic/1', true, 'id', 'type', 1));
+
+        $this->assertSame($options->toArray(), [
+            'topics' => ['/topic/1'],
+            'private' => true,
+            'id' => 'id',
+            'type' => 'type',
+            'retry' => 1,
+        ]);
+    }
+
+    public function testConstructWithWrongTopicsThrows()
+    {
+        $this->expectException(TypeError::class);
+        new MercureOptions(1);
+    }
+}

src/Symfony/Component/Notifier/Bridge/Mercure/Tests/MercureTransportFactoryTest.php

@@ -0,0 +1,77 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Notifier\Bridge\Mercure\Tests;
+
+use LogicException;
+use Symfony\Component\Mercure\PublisherInterface;
+use Symfony\Component\Notifier\Bridge\Mercure\MercureTransportFactory;
+use Symfony\Component\Notifier\Tests\TransportFactoryTestCase;
+use Symfony\Component\Notifier\Transport\Dsn;
+use Symfony\Component\Notifier\Transport\TransportFactoryInterface;
+use Symfony\Contracts\Service\ServiceProviderInterface;
+
+/**
+ * @author Mathias Arlaud <mathias.arlaud@gmail.com>
+ */
+final class MercureTransportFactoryTest extends TransportFactoryTestCase
+{
+    public function createFactory(): TransportFactoryInterface
+    {
+        $publisherLocator = $this->createMock(ServiceProviderInterface::class);
+        $publisherLocator->method('has')->willReturn(true);
+        $publisherLocator->method('get')->willReturn($this->createMock(PublisherInterface::class));
+
+        return new MercureTransportFactory($publisherLocator);
+    }
+
+    public function supportsProvider(): iterable
+    {
+        yield [true, 'mercure://publisherId?topic=topic'];
+        yield [false, 'somethingElse://publisherId?topic=topic'];
+    }
+
+    public function createProvider(): iterable
+    {
+        yield [
+            'mercure://publisherId?topic=%2Ftopic%2F1',
+            'mercure://publisherId?topic=/topic/1',
+        ];
+
+        yield [
+            'mercure://publisherId?topic%5B0%5D=%2Ftopic%2F1&topic%5B1%5D=%2Ftopic%2F2',
+            'mercure://publisherId?topic[]=/topic/1&topic[]=/topic/2',
+        ];
+
+        yield [
+            'mercure://publisherId?topic=https%3A%2F%2Fsymfony.com%2Fnotifier',
+            'mercure://publisherId',
+        ];
+    }
+
+    public function unsupportedSchemeProvider(): iterable
+    {
+        yield ['somethingElse://publisherId?topic=topic'];
+    }
+
+    public function testNotFoundPublisherThrows()
+    {
+        $publisherLocator = $this->createMock(ServiceProviderInterface::class);
+        $publisherLocator->method('has')->willReturn(false);
+        $publisherLocator->method('getProvidedServices')->willReturn(['fooPublisher' => 'fooFqcn', 'barPublisher' => 'barFqcn']);
+
+        $factory = new MercureTransportFactory($publisherLocator);
+
+        $this->expectException(LogicException::class);
+        $this->expectExceptionMessage('"publisherId" not found. Did you mean one of: fooPublisher, barPublisher?');
+        $factory->create(new Dsn('mercure://publisherId'));
+    }
+}

src/Symfony/Component/Notifier/Bridge/Mercure/Tests/MercureTransportTest.php

@@ -0,0 +1,163 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Notifier\Bridge\Mercure\Tests;
+
+use Symfony\Component\Mercure\PublisherInterface;
+use Symfony\Component\Mercure\Update;
+use Symfony\Component\Notifier\Bridge\Mercure\MercureOptions;
+use Symfony\Component\Notifier\Bridge\Mercure\MercureTransport;
+use Symfony\Component\Notifier\Exception\InvalidArgumentException;
+use Symfony\Component\Notifier\Exception\LogicException;
+use Symfony\Component\Notifier\Exception\TransportException;
+use Symfony\Component\Notifier\Message\ChatMessage;
+use Symfony\Component\Notifier\Message\MessageInterface;
+use Symfony\Component\Notifier\Message\MessageOptionsInterface;
+use Symfony\Component\Notifier\Message\SmsMessage;
+use Symfony\Component\Notifier\Tests\TransportTestCase;
+use Symfony\Component\Notifier\Transport\TransportInterface;
+use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
+use TypeError;
+
+/**
+ * @author Mathias Arlaud <mathias.arlaud@gmail.com>
+ */
+final class MercureTransportTest extends TransportTestCase
+{
+    public function createTransport(?HttpClientInterface $client = null, ?PublisherInterface $publisher = null, string $publisherId = 'publisherId', $topics = null): TransportInterface
+    {
+        $publisher = $publisher ?? $this->createMock(PublisherInterface::class);
+
+        return new MercureTransport($publisher, $publisherId, $topics);
+    }
+
+    public function toStringProvider(): iterable
+    {
+        yield ['mercure://publisherId?topic=https%3A%2F%2Fsymfony.com%2Fnotifier', $this->createTransport()];
+        yield ['mercure://customPublisherId?topic=%2Ftopic', $this->createTransport(null, null, 'customPublisherId', '/topic')];
+        yield ['mercure://customPublisherId?topic%5B0%5D=%2Ftopic%2F1&topic%5B1%5D%5B0%5D=%2Ftopic%2F2', $this->createTransport(null, null, 'customPublisherId', ['/topic/1', ['/topic/2']])];
+    }
+
+    public function supportedMessagesProvider(): iterable
+    {
+        yield [new ChatMessage('Hello!')];
+    }
+
+    public function unsupportedMessagesProvider(): iterable
+    {
+        yield [new SmsMessage('0611223344', 'Hello!')];
+        yield [$this->createMock(MessageInterface::class)];
+    }
+
+    public function testCanSetCustomPort()
+    {
+        $this->markTestSkipped("Mercure transport doesn't use a regular HTTP Dsn");
+    }
+
+    public function testCanSetCustomHost()
+    {
+        $this->markTestSkipped("Mercure transport doesn't use a regular HTTP Dsn");
+    }
+
+    public function testCanSetCustomHostAndPort()
+    {
+        $this->markTestSkipped("Mercure transport doesn't use a regular HTTP Dsn");
+    }
+
+    public function testConstructWithWrongTopicsThrows()
+    {
+        $this->expectException(TypeError::class);
+        $this->createTransport(null, null, 'publisherId', 1);
+    }
+
+    public function testSendWithNonMercureOptionsThrows()
+    {
+        $this->expectException(LogicException::class);
+        $this->createTransport()->send(new ChatMessage('testMessage', $this->createMock(MessageOptionsInterface::class)));
+    }
+
+    public function testSendWithWrongResponseThrows()
+    {
+        $response = $this->createMock(ResponseInterface::class);
+        $response->method('getContent')->willReturn('Service Unavailable');
+
+        $httpException = $this->createMock(ServerExceptionInterface::class);
+        $httpException->method('getResponse')->willReturn($response);
+
+        $publisher = $this->createMock(PublisherInterface::class);
+        $publisher->method('__invoke')->willThrowException($httpException);
+
+        $this->expectException(TransportException::class);
+        $this->expectExceptionMessage('Unable to post the Mercure message: "Service Unavailable".');
+
+        $this->createTransport(null, $publisher)->send(new ChatMessage('subject'));
+    }
+
+    public function testSendWithWrongTokenThrows()
+    {
+        $publisher = $this->createMock(PublisherInterface::class);
+        $publisher->method('__invoke')->willThrowException(new \InvalidArgumentException('The provided JWT is not valid'));
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('Unable to post the Mercure message: "The provided JWT is not valid".');
+
+        $this->createTransport(null, $publisher)->send(new ChatMessage('subject'));
+    }
+
+    public function testSendWithMercureOptions()
+    {
+        $publisher = $this->createMock(PublisherInterface::class);
+        $publisher
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with(new Update(['/topic/1', '/topic/2'], '{"@context":"https:\/\/www.w3.org\/ns\/activitystreams","type":"Announce","summary":"subject"}', true, 'id', 'type', 1))
+        ;
+
+        $this->createTransport(null, $publisher)->send(new ChatMessage('subject', new MercureOptions(['/topic/1', '/topic/2'], true, 'id', 'type', 1)));
+    }
+
+    public function testSendWithMercureOptionsButWithoutOptionTopic()
+    {
+        $publisher = $this->createMock(PublisherInterface::class);
+        $publisher
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with(new Update(['https://symfony.com/notifier'], '{"@context":"https:\/\/www.w3.org\/ns\/activitystreams","type":"Announce","summary":"subject"}', true, 'id', 'type', 1))
+        ;
+
+        $this->createTransport(null, $publisher)->send(new ChatMessage('subject', new MercureOptions(null, true, 'id', 'type', 1)));
+    }
+
+    public function testSendWithoutMercureOptions()
+    {
+        $publisher = $this->createMock(PublisherInterface::class);
+        $publisher
+            ->expects($this->once())
+            ->method('__invoke')
+            ->with(new Update(['https://symfony.com/notifier'], '{"@context":"https:\/\/www.w3.org\/ns\/activitystreams","type":"Announce","summary":"subject"}'))
+        ;
+
+        $this->createTransport(null, $publisher)->send(new ChatMessage('subject'));
+    }
+
+    public function testSendSuccessfully()
+    {
+        $messageId = 'urn:uuid:a7045be0-a75d-4d40-8bd2-29fa4e5dd10b';
+
+        $publisher = $this->createMock(PublisherInterface::class);
+        $publisher->method('__invoke')->willReturn($messageId);
+
+        $sentMessage = $this->createTransport(null, $publisher)->send(new ChatMessage('subject'));
+        $this->assertSame($messageId, $sentMessage->getMessageId());
+    }
+}

src/Symfony/Component/Notifier/Bridge/Mercure/composer.json

@@ -0,0 +1,32 @@
+{
+    "name": "symfony/mercure-notifier",
+    "type": "symfony-bridge",
+    "description": "Symfony Mercure Notifier Bridge",
+    "keywords": ["mercure", "notifier"],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Mathias Arlaud",
+            "email": "mathias.arlaud@gmail.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=7.2.5",
+        "ext-json": "*",
+        "symfony/mercure": "^0.4",
+        "symfony/notifier": "^5.3",
+        "symfony/service-contracts": "^1.10|^2"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\Mercure\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
+    },
+    "minimum-stability": "dev"
+}

src/Symfony/Component/Notifier/Bridge/Mercure/phpunit.xml.dist

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/5.2/phpunit.xsd"
+         backupGlobals="false"
+         colors="true"
+         bootstrap="vendor/autoload.php"
+         failOnRisky="true"
+         failOnWarning="true"
+>
+    <php>
+        <ini name="error_reporting" value="-1" />
+    </php>
+
+    <testsuites>
+        <testsuite name="Symfony Mercure Notifier Bridge Test Suite">
+            <directory>./Tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory>./</directory>
+            <exclude>
+                <directory>./Resources</directory>
+                <directory>./Tests</directory>
+                <directory>./vendor</directory>
+            </exclude>
+        </whitelist>
+    </filter>
+</phpunit>

src/Symfony/Component/Notifier/Exception/UnsupportedSchemeException.php

@@ -100,6 +100,10 @@ class UnsupportedSchemeException extends LogicException
             'class' => Bridge\Octopush\OctopushTransportFactory::class,
             'package' => 'symfony/octopush-notifier',
         ],
+        'mercure' => [
+            'class' => Bridge\Mercure\MercureTransportFactory::class,
+            'package' => 'symfony/mercure-notifier',
+        ],
     ];
 
     /**