1 files changed, 33 insertions, 0 deletions
diff --git a/app/graphql/mutations/notes/create/diff_note.rb b/app/graphql/mutations/notes/create/diff_note.rb
new file mode 100644
index 00000000000..9b5f3092006
--- /dev/null
+++ b/app/graphql/mutations/notes/create/diff_note.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module Mutations
+  module Notes
+    module Create
+      class DiffNote < Base
+        graphql_name 'CreateDiffNote'
+
+        argument :position,
+                  Types::Notes::DiffPositionInputType,
+                  required: true,
+                  description: copy_field_description(Types::Notes::NoteType, :position)
+
+        private
+
+        def create_note_params(noteable, args)
+          super(noteable, args).merge({
+            type: 'DiffNote',
+            position: position(noteable, args)
+          })
+        end
+
+        def position(noteable, args)
+          position = args[:position].to_h
+          position[:position_type] = 'text'
+          position.merge!(position[:paths].to_h)
+
+          Gitlab::Diff::Position.new(position)
+        end
+      end
+    end
+  end
+end