Send Brrr push notifications for new webmentions

Dispatches a queued job to POST to a configured Brrr webhook whenever
a brand-new webmention is saved, so replies/likes/reposts show up as
push notifications instead of requiring a manual check of the site.

tests/Unit/Jobs/NotifyBrrrOfWebMentionJobTest.php

@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Jobs;
+
+use App\Jobs\NotifyBrrrOfWebMention;
+use App\Models\WebMention;
+use Illuminate\Http\Client\Request;
+use Illuminate\Support\Facades\Http;
+use PHPUnit\Framework\Attributes\Test;
+use Tests\TestCase;
+
+class NotifyBrrrOfWebMentionJobTest extends TestCase
+{
+    #[Test]
+    public function it_posts_a_reply_notification_to_the_brrr_webhook(): void
+    {
+        config(['services.brrr.webhook_url' => 'https://api.brrr.now/v1/br_usr_test']);
+        Http::fake();
+
+        $webMention = WebMention::factory()->make([
+            'source' => 'https://example.org/reply/1',
+            'target' => 'https://jonnybarnes.uk/notes/1',
+            'type' => 'in-reply-to',
+        ]);
+
+        $job = new NotifyBrrrOfWebMention($webMention);
+        $job->handle();
+
+        Http::assertSent(function (Request $request) {
+            return $request->url() === 'https://api.brrr.now/v1/br_usr_test'
+                && $request['title'] === 'New reply'
+                && $request['message'] === 'From https://example.org/reply/1'
+                && $request['open_url'] === 'https://jonnybarnes.uk/notes/1';
+        });
+    }
+
+    #[Test]
+    public function it_titles_notifications_by_webmention_type(): void
+    {
+        config(['services.brrr.webhook_url' => 'https://api.brrr.now/v1/br_usr_test']);
+        Http::fake();
+
+        foreach ([
+            'in-reply-to' => 'New reply',
+            'like-of' => 'New like',
+            'repost-of' => 'New repost',
+            'something-else' => 'New webmention',
+        ] as $type => $expectedTitle) {
+            $webMention = WebMention::factory()->make(['type' => $type]);
+
+            (new NotifyBrrrOfWebMention($webMention))->handle();
+
+            Http::assertSent(fn (Request $request) => $request['title'] === $expectedTitle);
+        }
+    }
+
+    #[Test]
+    public function it_does_nothing_when_no_webhook_url_is_configured(): void
+    {
+        config(['services.brrr.webhook_url' => null]);
+        Http::fake();
+
+        $webMention = WebMention::factory()->make();
+
+        (new NotifyBrrrOfWebMention($webMention))->handle();
+
+        Http::assertNothingSent();
+    }
+}

tests/Unit/Jobs/ProcessWebMentionJobTest.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Tests\Unit\Jobs;
 
 use App\Exceptions\RemoteContentNotFoundException;
+use App\Jobs\NotifyBrrrOfWebMention;
 use App\Jobs\ProcessWebMention;
 use App\Jobs\SaveProfileImage;
 use App\Models\Note;
@@ -71,6 +72,7 @@ class ProcessWebMentionJobTest extends TestCase
         $job->handle($parser);
 
         Queue::assertPushed(SaveProfileImage::class);
+        Queue::assertPushed(NotifyBrrrOfWebMention::class);
         $this->assertDatabaseHas('webmentions', [
             'source' => $source,
             'type' => 'like-of',
@@ -104,6 +106,7 @@ class ProcessWebMentionJobTest extends TestCase
         $job->handle($parser);
 
         Queue::assertPushed(SaveProfileImage::class);
+        Queue::assertNotPushed(NotifyBrrrOfWebMention::class);
         $this->assertDatabaseHas('webmentions', [
             'source' => $source,
             'type' => 'in-reply-to',
@@ -206,6 +209,7 @@ class ProcessWebMentionJobTest extends TestCase
         $job = new ProcessWebMention($note, $source);
         $job->handle($parser);
 
+        Queue::assertPushed(NotifyBrrrOfWebMention::class);
         $this->assertGreaterThan(255, strlen($source));
         $this->assertDatabaseHas('webmentions', [
             'source' => $source,