7 files changed, 41 insertions, 21 deletions
diff --git a/app/lib/activitypub/activity.rb b/app/lib/activitypub/activity.rb
index 6f4a3b491..9b00f0f52 100644
--- a/app/lib/activitypub/activity.rb
+++ b/app/lib/activitypub/activity.rb
@@ -46,6 +46,10 @@ class ActivityPub::Activity
         ActivityPub::Activity::Reject
       when 'Flag'
         ActivityPub::Activity::Flag
+      when 'Add'
+        ActivityPub::Activity::Add
+      when 'Remove'
+        ActivityPub::Activity::Remove
       end
     end
   end
diff --git a/app/lib/activitypub/activity/add.rb b/app/lib/activitypub/activity/add.rb
new file mode 100644
index 000000000..ea94d2f98
--- /dev/null
+++ b/app/lib/activitypub/activity/add.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class ActivityPub::Activity::Add < ActivityPub::Activity
+  def perform
+    return unless @json['target'].present? && value_or_id(@json['target']) == @account.featured_collection_url
+
+    status = status_from_uri(object_uri)
+
+    return unless status.account_id == @account.id && !@account.pinned?(status)
+
+    StatusPin.create!(account: @account, status: status)
+  end
+end
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index a7afbb859..5a1c13d67 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -20,13 +20,12 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   private
 
   def process_status
-    media_attachments = process_attachments
+    status_params = process_status_params
 
     ApplicationRecord.transaction do
       @status = Status.create!(status_params)
 
       process_tags(@status)
-      attach_media(@status, media_attachments)
     end
 
     resolve_thread(@status)
@@ -40,7 +39,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     status
   end
 
-  def status_params
+  def process_status_params
     {
       uri: @object['id'],
       url: object_url || @object['id'],
@@ -54,6 +53,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
       visibility: visibility_from_audience,
       thread: replied_to_status,
       conversation: conversation_from_uri(@object['conversation']),
+      media_attachments: process_attachments.take(4),
     }
   end
 
@@ -108,7 +108,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   end
 
   def process_attachments
-    return if @object['attachment'].nil?
+    return [] if @object['attachment'].nil?
 
     media_attachments = []
 
@@ -132,13 +132,6 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     media_attachments
   end
 
-  def attach_media(status, media_attachments)
-    return if media_attachments.blank?
-
-    media = MediaAttachment.where(status_id: nil, id: media_attachments.take(4).map(&:id))
-    media.update(status_id: status.id)
-  end
-
   def resolve_thread(status)
     return unless status.reply? && status.thread.nil?
     ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)
diff --git a/app/lib/activitypub/activity/remove.rb b/app/lib/activitypub/activity/remove.rb
new file mode 100644
index 000000000..62a1e3196
--- /dev/null
+++ b/app/lib/activitypub/activity/remove.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class ActivityPub::Activity::Remove < ActivityPub::Activity
+  def perform
+    return unless @json['target'].present? && value_or_id(@json['target']) == @account.featured_collection_url
+
+    status = status_from_uri(object_uri)
+
+    return unless status.account_id == @account.id
+
+    pin = StatusPin.find_by(account: @account, status: status)
+    pin&.destroy!
+  end
+end
diff --git a/app/lib/activitypub/adapter.rb b/app/lib/activitypub/adapter.rb
index 8198ac580..f19b04ae6 100644
--- a/app/lib/activitypub/adapter.rb
+++ b/app/lib/activitypub/adapter.rb
@@ -18,6 +18,7 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
         'toot'                      => 'http://joinmastodon.org/ns#',
         'Emoji'                     => 'toot:Emoji',
         'focalPoint'                => { '@container' => '@list', '@id' => 'toot:focalPoint' },
+        'featured'                  => 'toot:featured',
       },
     ],
   }.freeze
diff --git a/app/lib/formatter.rb b/app/lib/formatter.rb
index 8c0f8cebc..1df4ff8d4 100644
--- a/app/lib/formatter.rb
+++ b/app/lib/formatter.rb
@@ -19,6 +19,8 @@ class Formatter
 
     raw_content = status.text
 
+    return '' if raw_content.blank?
+
     unless status.local?
       html = reformat(raw_content)
       html = encode_custom_emojis(html, status.emojis) if options[:custom_emojify]
diff --git a/app/lib/ostatus/activity/creation.rb b/app/lib/ostatus/activity/creation.rb
index 7cf2d90dc..aa46267dc 100644
--- a/app/lib/ostatus/activity/creation.rb
+++ b/app/lib/ostatus/activity/creation.rb
@@ -29,7 +29,7 @@ class OStatus::Activity::Creation < OStatus::Activity::Base
     # Skip if the reblogged status is not public
     return if cached_reblog && !(cached_reblog.public_visibility? || cached_reblog.unlisted_visibility?)
 
-    media_attachments = save_media
+    media_attachments = save_media.take(4)
 
     ApplicationRecord.transaction do
       status = Status.create!(
@@ -44,12 +44,12 @@ class OStatus::Activity::Creation < OStatus::Activity::Base
         language: content_language,
         visibility: visibility_scope,
         conversation: find_or_create_conversation,
-        thread: thread? ? find_status(thread.first) || find_activitypub_status(thread.first, thread.second) : nil
+        thread: thread? ? find_status(thread.first) || find_activitypub_status(thread.first, thread.second) : nil,
+        media_attachments: media_attachments
       )
 
       save_mentions(status)
       save_hashtags(status)
-      attach_media(status, media_attachments)
       save_emojis(status)
     end
 
@@ -159,13 +159,6 @@ class OStatus::Activity::Creation < OStatus::Activity::Base
     media_attachments
   end
 
-  def attach_media(parent, media_attachments)
-    return if media_attachments.blank?
-
-    media = MediaAttachment.where(status_id: nil, id: media_attachments.take(4).map(&:id))
-    media.update(status_id: parent.id)
-  end
-
   def save_emojis(parent)
     do_not_download = DomainBlock.find_by(domain: parent.account.domain)&.reject_media?