Use issuable.system_note_timestamp when present

When updating resource events, we follow the provided
system_note_timestamp in case it is provided in the API call

app/services/resource_events/base_change_timebox_service.rb

@@ -2,12 +2,11 @@
 
 module ResourceEvents
   class BaseChangeTimeboxService
-    attr_reader :resource, :user, :event_created_at
+    attr_reader :resource, :user
 
-    def initialize(resource, user, created_at: Time.current)
+    def initialize(resource, user)
       @resource = resource
       @user = user
-      @event_created_at = created_at
     end
 
     def execute
@@ -27,7 +26,7 @@ module ResourceEvents
 
       {
         user_id: user.id,
-        created_at: event_created_at,
+        created_at: resource.system_note_timestamp,
         key => resource.id
       }
     end

app/services/resource_events/change_milestone_service.rb

@@ -4,8 +4,8 @@ module ResourceEvents
   class ChangeMilestoneService < BaseChangeTimeboxService
     attr_reader :milestone, :old_milestone
 
-    def initialize(resource, user, created_at: Time.current, old_milestone:)
-      super(resource, user, created_at: created_at)
+    def initialize(resource, user, old_milestone:)
+      super(resource, user)
 
       @milestone = resource&.milestone
       @old_milestone = old_milestone

changelogs/unreleased/233708-fix-resource-event-timestamps.yml

+---
+title: Use user-provided timestamp when updating issue and merge request milestones,
+  iterations, and weights using the API
+merge_request: 53237
+author:
+type: fixed

ee/app/services/ee/issuable/common_system_notes_service.rb

@@ -42,7 +42,7 @@ module EE
       def handle_weight_change
         return unless issuable.previous_changes.include?('weight')
 
-        ::ResourceEvents::ChangeWeightService.new(issuable, current_user, Time.current).execute
+        ::ResourceEvents::ChangeWeightService.new(issuable, current_user).execute
       end
 
       def handle_health_status_change

ee/app/services/resource_events/change_iteration_service.rb

@@ -4,8 +4,8 @@ module ResourceEvents
   class ChangeIterationService < ::ResourceEvents::BaseChangeTimeboxService
     attr_reader :iteration, :old_iteration_id
 
-    def initialize(resource, user, created_at: Time.current, old_iteration_id:)
-      super(resource, user, created_at: created_at)
+    def initialize(resource, user, old_iteration_id:)
+      super(resource, user)
 
       @iteration = resource&.iteration
       @old_iteration_id = old_iteration_id

ee/app/services/resource_events/change_weight_service.rb

@@ -2,12 +2,11 @@
 
 module ResourceEvents
   class ChangeWeightService
-    attr_reader :resource, :user, :event_created_at
+    attr_reader :resource, :user
 
-    def initialize(resource, user, created_at)
+    def initialize(resource, user)
       @resource = resource
       @user = user
-      @event_created_at = created_at
     end
 
     def execute
@@ -24,7 +23,7 @@ module ResourceEvents
       base_data = { user_id: user.id, issue_id: resource.id }
 
       changes << base_data.merge({ weight: resource.previous_weight, created_at: resource.previous_updated_at }) if resource.first_weight_event?
-      changes << base_data.merge({ weight: resource.weight, created_at: event_created_at })
+      changes << base_data.merge({ weight: resource.weight, created_at: resource.system_note_timestamp })
 
       changes
     end

ee/spec/services/ee/resource_events/change_iteration_service_spec.rb

@@ -6,8 +6,8 @@ RSpec.describe ResourceEvents::ChangeIterationService do
   let_it_be(:timebox) { create(:iteration) }
 
   let(:created_at_time) { Time.utc(2019, 12, 30) }
-  let(:add_timebox_args) { { created_at: created_at_time, old_iteration_id: nil } }
-  let(:remove_timebox_args) { { created_at: created_at_time, old_iteration_id: timebox.id } }
+  let(:add_timebox_args) { { old_iteration_id: nil } }
+  let(:remove_timebox_args) { { old_iteration_id: timebox.id } }
 
   [:issue, :merge_request].each do |issuable|
     it_behaves_like 'timebox(milestone or iteration) resource events creator', ResourceIterationEvent do

ee/spec/services/resource_events/change_weight_service_spec.rb

@@ -8,10 +8,11 @@ RSpec.describe ResourceEvents::ChangeWeightService do
   let(:issue) { create(:issue, weight: 3) }
   let(:created_at_time) { Time.utc(2019, 1, 1, 12, 30, 48, '123.123'.to_r) }
 
-  subject { described_class.new(issue, user, created_at_time).execute }
+  subject { described_class.new(issue, user).execute }
 
   before do
     ResourceWeightEvent.new(issue: issue, user: user).save!
+    issue.system_note_timestamp = created_at_time
   end
 
   it 'creates the expected event record' do

spec/services/resource_events/change_milestone_service_spec.rb

@@ -6,8 +6,8 @@ RSpec.describe ResourceEvents::ChangeMilestoneService do
   let_it_be(:timebox) { create(:milestone) }
 
   let(:created_at_time) { Time.utc(2019, 12, 30) }
-  let(:add_timebox_args) { { created_at: created_at_time, old_milestone: nil } }
-  let(:remove_timebox_args) { { created_at: created_at_time, old_milestone: timebox } }
+  let(:add_timebox_args) { { old_milestone: nil } }
+  let(:remove_timebox_args) { { old_milestone: timebox } }
 
   [:issue, :merge_request].each do |issuable|
     it_behaves_like 'timebox(milestone or iteration) resource events creator', ResourceMilestoneEvent do

spec/support/shared_examples/services/resource_events/change_milestone_service_shared_examples.rb

@@ -3,6 +3,10 @@
 RSpec.shared_examples 'timebox(milestone or iteration) resource events creator' do |timebox_event_class|
   let_it_be(:user) { create(:user) }
 
+  before do
+    resource.system_note_timestamp = created_at_time
+  end
+
   context 'when milestone/iteration is added' do
     let(:service) { described_class.new(resource, user, **add_timebox_args) }