1 files changed, 57 insertions, 0 deletions
diff --git a/app/controllers/activitypub/collections_controller.rb b/app/controllers/activitypub/collections_controller.rb
new file mode 100644
index 000000000..081914016
--- /dev/null
+++ b/app/controllers/activitypub/collections_controller.rb
@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+class ActivityPub::CollectionsController < Api::BaseController
+  include SignatureVerification
+
+  before_action :set_account
+  before_action :set_size
+  before_action :set_statuses
+
+  def show
+    render json: collection_presenter,
+           serializer: ActivityPub::CollectionSerializer,
+           adapter: ActivityPub::Adapter,
+           content_type: 'application/activity+json',
+           skip_activities: true
+  end
+
+  private
+
+  def set_account
+    @account = Account.find_local!(params[:account_username])
+  end
+
+  def set_statuses
+    @statuses = scope_for_collection.paginate_by_max_id(20, params[:max_id], params[:since_id])
+    @statuses = cache_collection(@statuses, Status)
+  end
+
+  def set_size
+    case params[:id]
+    when 'featured'
+      @account.pinned_statuses.count
+    else
+      raise ActiveRecord::NotFound
+    end
+  end
+
+  def scope_for_collection
+    case params[:id]
+    when 'featured'
+      @account.statuses.permitted_for(@account, signed_request_account).tap do |scope|
+        scope.merge!(@account.pinned_statuses)
+      end
+    else
+      raise ActiveRecord::NotFound
+    end
+  end
+
+  def collection_presenter
+    ActivityPub::CollectionPresenter.new(
+      id: account_collection_url(@account, params[:id]),
+      type: :ordered,
+      size: @size,
+      items: @statuses
+    )
+  end
+end