API: Make the /notes endpoint work with noteable iid instead of id

In API V4 all endpoints were changed so Merge Requests and Issues
should be referred by iid, instead of id. Except the /notes endpoint
was forgotten. So change the endpoints from:

- /projects/:id/issues/:issue_id/notes
- /projects/:id/merge_requests/:merge_request_id/notes

To:

- /projects/:id/issues/:issue_iid/notes
- /projects/:id/merge_requests/:merge_request_iid/notes

For Project Snippets nothing changes.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/api/helpers.rb b/lib/api/helpers.rb
index bd22b82476b..61527c1e20b 100644
--- a/lib/api/helpers.rb
+++ b/lib/api/helpers.rb
@@ -90,6 +90,11 @@ module API
       MergeRequestsFinder.new(current_user, project_id: user_project.id).find_by!(iid: iid)
     end
 
+    def find_project_snippet(id)
+      finder_params = { filter: :by_project, project: user_project }
+      SnippetsFinder.new.execute(current_user, finder_params).find(id)
+    end
+
     def find_merge_request_with_access(iid, access_level = :read_merge_request)
       merge_request = user_project.merge_requests.find_by!(iid: iid)
       authorize! access_level, merge_request