1 files changed, 52 insertions, 0 deletions
diff --git a/lib/gitlab/github_import/importer/events/changed_assignee.rb b/lib/gitlab/github_import/importer/events/changed_assignee.rb
new file mode 100644
index 00000000000..c8f6335e4a8
--- /dev/null
+++ b/lib/gitlab/github_import/importer/events/changed_assignee.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module GithubImport
+    module Importer
+      module Events
+        class ChangedAssignee < BaseImporter
+          def execute(issue_event)
+            assignee_id = author_id(issue_event, author_key: :assignee)
+            assigner_id = author_id(issue_event, author_key: :assigner)
+
+            note_body = parse_body(issue_event, assigner_id, assignee_id)
+
+            create_note(issue_event, note_body, assigner_id)
+          end
+
+          private
+
+          def create_note(issue_event, note_body, assigner_id)
+            Note.create!(
+              system: true,
+              noteable_type: Issue.name,
+              noteable_id: issuable_db_id(issue_event),
+              project: project,
+              author_id: assigner_id,
+              note: note_body,
+              system_note_metadata: SystemNoteMetadata.new(
+                {
+                  action: "assignee",
+                  created_at: issue_event.created_at,
+                  updated_at: issue_event.created_at
+                }
+              ),
+              created_at: issue_event.created_at,
+              updated_at: issue_event.created_at
+            )
+          end
+
+          def parse_body(issue_event, assigner_id, assignee_id)
+            Gitlab::I18n.with_default_locale do
+              if issue_event.event == "unassigned"
+                "unassigned #{User.find(assigner_id).to_reference}"
+              else
+                "assigned to #{User.find(assignee_id).to_reference}"
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end