fix: media search also matches file names

src/Integrations/Media/MediaSearchAbility.php

@@ -208,7 +208,7 @@ final class MediaSearchAbility implements Ability
      */
     private function searchPage(array $args, int $limit, int $offset): array
     {
-        $rows = get_posts(array_merge($args, ['posts_per_page' => $limit + 1, 'offset' => $offset]));
+        $rows = self::query(array_merge($args, ['posts_per_page' => $limit + 1, 'offset' => $offset]));
         $page = Cursor::page(array_values($rows), $limit, $offset);
 
         return [
@@ -230,7 +230,7 @@ final class MediaSearchAbility implements Ability
      */
     private function unusedPage(array $args, int $limit, int $offset): array
     {
-        $candidates = array_values(get_posts(array_merge($args, [
+        $candidates = array_values(self::query(array_merge($args, [
             'posts_per_page' => self::MAX_SCAN + 1,
             'offset' => $offset,
         ])));
@@ -282,4 +282,22 @@ final class MediaSearchAbility implements Ability
     {
         return current_user_can('edit_post', (int) $attachment->ID);
     }
+
+    /**
+     * get_posts() with file-name matching for a search term, as in the media library screen:
+     * WordPress only searches _wp_attached_file when wp_allow_query_attachment_by_filename is
+     * true. WP_Query reads that filter once per query and then calls remove_all_filters() on it
+     * itself, so it applies to this query only.
+     *
+     * @param array<string, mixed> $args
+     * @return array<int|string, mixed>
+     */
+    private static function query(array $args): array
+    {
+        if (isset($args['s'])) {
+            add_filter('wp_allow_query_attachment_by_filename', '__return_true');
+        }
+
+        return get_posts($args);
+    }
 }

tests/Unit/Integrations/Media/MediaSearchAbilityTest.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace LIT\MCP\Tests\Unit\Integrations\Media;
 
+use Brain\Monkey\Filters;
 use Brain\Monkey\Functions;
 use LIT\MCP\Abilities\Cursor;
 use LIT\MCP\Integrations\Media\MediaPresenter;
@@ -149,6 +150,39 @@ final class MediaSearchAbilityTest extends TestCase
         (new MediaSearchAbility($this->presenter(), Mockery::mock(MediaUsageFinder::class)))->execute([]);
     }
 
+    public function testASearchTermAlsoMatchesFileNames(): void
+    {
+        $this->unrestrictedPostType();
+        Functions\when('current_user_can')->justReturn(true);
+        Filters\expectAdded('wp_allow_query_attachment_by_filename')->once()->with('__return_true');
+        Functions\expect('get_posts')->once()->with(
+            Mockery::on(static fn (array $args): bool => ($args['s'] ?? null) === 'logo')
+        )->andReturn([]);
+
+        (new MediaSearchAbility($this->presenter(), Mockery::mock(MediaUsageFinder::class)))->execute(['search' => 'logo']);
+    }
+
+    public function testTheUnusedScanAlsoMatchesFileNames(): void
+    {
+        $this->unrestrictedPostType();
+        Functions\when('current_user_can')->justReturn(true);
+        Filters\expectAdded('wp_allow_query_attachment_by_filename')->once()->with('__return_true');
+        Functions\when('get_posts')->justReturn([]);
+
+        (new MediaSearchAbility($this->presenter(), Mockery::mock(MediaUsageFinder::class)))
+            ->execute(['search' => 'logo', 'unused' => true]);
+    }
+
+    public function testNoFileNameFilterWithoutASearchTerm(): void
+    {
+        $this->unrestrictedPostType();
+        Functions\when('current_user_can')->justReturn(true);
+        Filters\expectAdded('wp_allow_query_attachment_by_filename')->never();
+        Functions\when('get_posts')->justReturn([]);
+
+        (new MediaSearchAbility($this->presenter(), Mockery::mock(MediaUsageFinder::class)))->execute([]);
+    }
+
     public function testUnusedFiltersThroughTheUsageFinder(): void
     {
         Functions\when('get_posts')->justReturn($this->attachments(1, 2, 3));