1 files changed, 39 insertions, 0 deletions
diff --git a/app/services/notes/build_service.rb b/app/services/notes/build_service.rb
new file mode 100644
index 00000000000..abf25bb778b
--- /dev/null
+++ b/app/services/notes/build_service.rb
@@ -0,0 +1,39 @@
+module Notes
+  class BuildService < ::BaseService
+    def execute
+      in_reply_to_discussion_id = params.delete(:in_reply_to_discussion_id)
+
+      if in_reply_to_discussion_id.present?
+        discussion = find_discussion(in_reply_to_discussion_id)
+
+        unless discussion
+          note = Note.new
+          note.errors.add(:base, 'Discussion to reply to cannot be found')
+          return note
+        end
+
+        params.merge!(discussion.reply_attributes)
+      end
+
+      note = Note.new(params)
+      note.project = project
+      note.author = current_user
+
+      note
+    end
+
+    def find_discussion(discussion_id)
+      if project
+        project.notes.find_discussion(discussion_id)
+      else
+        # only PersonalSnippets can have discussions without project association
+        discussion = Note.find_discussion(discussion_id)
+        noteable = discussion.noteable
+
+        return nil unless noteable.is_a?(PersonalSnippet) && can?(current_user, :comment_personal_snippet, noteable)
+
+        discussion
+      end
+    end
+  end
+end