Update existing draft articles instead of erroring on a repeat Micropub post

If a Micropub h-entry post's title matches an existing article that's
still a draft, update that article in place rather than trying to
insert a duplicate. If it matches one that's already published,
reject the request with a clear error instead of silently colliding.

Also set includeTrashed on Article's slug config as a safety net: this
model soft-deletes, and Sluggable's uniqueness check ignores trashed
rows by default, so a previously-deleted article's title could crash
new inserts with a raw unique constraint violation (this is exactly
what surfaced in Flare as a UniqueConstraintViolationException on
articles_titleurl_unique once the prior swallowed-exception fix
shipped).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/Models/Article.php

@@ -40,6 +40,7 @@ class Article extends Model
         return [
             'titleurl' => [
                 'source' => 'title',
+                'includeTrashed' => true,
             ],
         ];
     }

app/Services/ArticleService.php

@@ -8,12 +8,29 @@ use App\Models\Article;
 
 class ArticleService
 {
+    /**
+     * @throws \InvalidArgumentException if a published article already has this title
+     */
     public function create(array $data): Article
     {
-        return Article::create([
+        $attributes = [
             'title' => $data['name'],
             'main' => $data['content'],
             'published' => ($data['post-status'] ?? null) !== 'draft',
-        ]);
+        ];
+
+        $existing = Article::where('title', $data['name'])->first();
+
+        if ($existing !== null) {
+            if ($existing->published) {
+                throw new \InvalidArgumentException("An article titled \"{$data['name']}\" has already been published");
+            }
+
+            $existing->update($attributes);
+
+            return $existing;
+        }
+
+        return Article::create($attributes);
     }
 }

tests/Feature/MicropubControllerTest.php

@@ -8,6 +8,7 @@ use App\Exceptions\MicropubHandlerException;
 use App\Jobs\SendWebMentions;
 use App\Jobs\SyndicateNoteToBluesky;
 use App\Jobs\SyndicateNoteToMastodon;
+use App\Models\Article;
 use App\Models\Media;
 use App\Models\Note;
 use App\Models\Place;
@@ -911,4 +912,64 @@ class MicropubControllerTest extends TestCase
             'published' => false,
         ]);
     }
+
+    #[Test]
+    public function micropub_client_api_request_updates_an_existing_draft_article_with_the_same_name(): void
+    {
+        $draft = Article::create([
+            'title' => 'WireGuard',
+            'main' => 'Early draft content',
+            'published' => false,
+        ]);
+
+        $response = $this->postJson(
+            '/api/post',
+            [
+                'type' => ['h-entry'],
+                'properties' => [
+                    'name' => ['WireGuard'],
+                    'content' => ['Finished content'],
+                ],
+            ],
+            ['HTTP_Authorization' => 'Bearer '.$this->getToken()]
+        );
+
+        $response
+            ->assertJson(['response' => 'created'])
+            ->assertStatus(201);
+        $this->assertSame(1, Article::where('title', 'WireGuard')->count());
+        $this->assertDatabaseHas('articles', [
+            'id' => $draft->id,
+            'title' => 'WireGuard',
+            'main' => 'Finished content',
+            'published' => true,
+        ]);
+    }
+
+    #[Test]
+    public function micropub_client_api_request_errors_when_an_article_with_the_same_name_is_already_published(): void
+    {
+        Article::create([
+            'title' => 'WireGuard',
+            'main' => 'Published content',
+            'published' => true,
+        ]);
+
+        $response = $this->postJson(
+            '/api/post',
+            [
+                'type' => ['h-entry'],
+                'properties' => [
+                    'name' => ['WireGuard'],
+                    'content' => ['Some other content'],
+                ],
+            ],
+            ['HTTP_Authorization' => 'Bearer '.$this->getToken()]
+        );
+
+        $response
+            ->assertJson(['error' => 'invalid_request'])
+            ->assertStatus(400);
+        $this->assertSame(1, Article::where('title', 'WireGuard')->count());
+    }
 }

tests/Unit/ArticlesTest.php

@@ -74,6 +74,17 @@ class ArticlesTest extends TestCase
         $this->assertEquals(config('app.url').$article->link, $article->uri);
     }
 
+    #[Test]
+    public function slug_is_suffixed_when_a_trashed_article_already_used_it(): void
+    {
+        $original = Article::create(['title' => 'My Title', 'main' => 'Content']);
+        $original->delete();
+
+        $newArticle = Article::create(['title' => 'My Title', 'main' => 'Other content']);
+
+        $this->assertEquals('my-title-2', $newArticle->titleurl);
+    }
+
     #[Test]
     public function date_scope_returns_expected_articles(): void
     {