Add bookmarks (#7107)

* Add backend support for bookmarks

Bookmarks behave like favourites, except they aren't shared with other
users and do not have an associated counter.

* Add spec for bookmark endpoints

* Add front-end support for bookmarks

* Introduce OAuth scopes for bookmarks

* Add bookmarks to archive takeout

* Fix migration

* Coding style fixes

* Fix rebase issue

* Update bookmarked_statuses to latest UI changes

* Update bookmark actions to properly reflect status changes in state

* Add bookmarks item to single-column layout

* Make active bookmarks red

app/services/backup_service.rb

@@ -45,6 +45,7 @@ class BackupService < BaseService
           dump_media_attachments!(tar)
           dump_outbox!(tar)
           dump_likes!(tar)
+          dump_bookmarks!(tar)
           dump_actor!(tar)
         end
       end
@@ -85,6 +86,7 @@ class BackupService < BaseService
     actor[:image][:url] = 'header' + File.extname(actor[:image][:url]) if actor[:image]
     actor[:outbox]      = 'outbox.json'
     actor[:likes]       = 'likes.json'
+    actor[:bookmarks]   = 'bookmarks.json'
 
     download_to_tar(tar, account.avatar, 'avatar' + File.extname(account.avatar.path)) if account.avatar.exists?
     download_to_tar(tar, account.header, 'header' + File.extname(account.header.path)) if account.header.exists?
@@ -115,6 +117,25 @@ class BackupService < BaseService
     end
   end
 
+  def dump_bookmarks!(tar)
+    collection = serialize(ActivityPub::CollectionPresenter.new(id: 'bookmarks.json', type: :ordered, size: 0, items: []), ActivityPub::CollectionSerializer)
+
+    Status.reorder(nil).joins(:bookmarks).includes(:account).merge(account.bookmarks).find_in_batches do |statuses|
+      statuses.each do |status|
+        collection[:totalItems] += 1
+        collection[:orderedItems] << ActivityPub::TagManager.instance.uri_for(status)
+      end
+
+      GC.start
+    end
+
+    json = Oj.dump(collection)
+
+    tar.add_file_simple('bookmarks.json', 0o444, json.bytesize) do |io|
+      io.write(json)
+    end
+  end
+
   def collection_presenter
     ActivityPub::CollectionPresenter.new(
       id: 'outbox.json',