1 files changed, 29 insertions, 0 deletions
diff --git a/app/services/system_notes/incident_service.rb b/app/services/system_notes/incident_service.rb
new file mode 100644
index 00000000000..4628662f0e9
--- /dev/null
+++ b/app/services/system_notes/incident_service.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module SystemNotes
+  class IncidentService < ::SystemNotes::BaseService
+    # Called when the severity of an Incident has changed
+    #
+    # Example Note text:
+    #
+    #   "changed the severity to Medium - S3"
+    #
+    # Returns the created Note object
+    def change_incident_severity
+      severity = noteable.severity
+
+      if severity_label = IssuableSeverity::SEVERITY_LABELS[severity.to_sym]
+        body = "changed the severity to **#{severity_label}**"
+
+        create_note(NoteSummary.new(noteable, project, author, body, action: 'severity'))
+      else
+        Gitlab::AppLogger.error(
+          message: 'Cannot create a system note for severity change',
+          noteable_class: noteable.class.to_s,
+          noteable_id: noteable.id,
+          severity: severity
+        )
+      end
+    end
+  end
+end