Add support for `summary` field for media description (#13763)

app/lib/activitypub/activity/create.rb

@@ -201,7 +201,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
 
       begin
         href             = Addressable::URI.parse(attachment['url']).normalize.to_s
-        media_attachment = MediaAttachment.create(account: @account, remote_url: href, description: attachment['name'].presence, focus: attachment['focalPoint'], blurhash: supported_blurhash?(attachment['blurhash']) ? attachment['blurhash'] : nil)
+        media_attachment = MediaAttachment.create(account: @account, remote_url: href, description: attachment['summary'].presence || attachment['name'].presence, focus: attachment['focalPoint'], blurhash: supported_blurhash?(attachment['blurhash']) ? attachment['blurhash'] : nil)
         media_attachments << media_attachment
 
         next if unsupported_media_type?(attachment['mediaType']) || skip_download?

spec/lib/activitypub/activity/create_spec.rb

@@ -287,6 +287,31 @@ RSpec.describe ActivityPub::Activity::Create do
         end
       end
 
+      context 'with media attachments with long description as summary' do
+        let(:object_json) do
+          {
+            id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
+            type: 'Note',
+            content: 'Lorem ipsum',
+            attachment: [
+              {
+                type: 'Document',
+                mediaType: 'image/png',
+                url: 'http://example.com/attachment.png',
+                summary: '*' * 1500,
+              },
+            ],
+          }
+        end
+
+        it 'creates status' do
+          status = sender.statuses.first
+
+          expect(status).to_not be_nil
+          expect(status.media_attachments.map(&:description)).to include('*' * 1500)
+        end
+      end
+
       context 'with media attachments with focal points' do
         let(:object_json) do
           {