1 files changed, 33 insertions, 0 deletions
diff --git a/app/graphql/mutations/incident_management/timeline_event/update.rb b/app/graphql/mutations/incident_management/timeline_event/update.rb
new file mode 100644
index 00000000000..1f53bdc19cb
--- /dev/null
+++ b/app/graphql/mutations/incident_management/timeline_event/update.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module Mutations
+  module IncidentManagement
+    module TimelineEvent
+      class Update < Base
+        graphql_name 'TimelineEventUpdate'
+
+        argument :id, ::Types::GlobalIDType[::IncidentManagement::TimelineEvent],
+                 required: true,
+                 description: 'ID of the timeline event to update.'
+
+        argument :note, GraphQL::Types::String,
+                 required: false,
+                 description: 'Text note of the timeline event.'
+
+        argument :occurred_at, Types::TimeType,
+                 required: false,
+                 description: 'Timestamp when the event occurred.'
+
+        def resolve(id:, **args)
+          timeline_event = authorized_find!(id: id)
+
+          response ::IncidentManagement::TimelineEvents::UpdateService.new(
+            timeline_event,
+            current_user,
+            args
+          ).execute
+        end
+      end
+    end
+  end
+end