Copy metric images from alert to new incident

When an incident is created from an alert, any metric images already on the
alert will be duplicated and saved against the incident.

Changelog: added
EE: true

app/services/alert_management/create_alert_issue_service.rb

@@ -22,9 +22,7 @@ def execute
       return result unless result.success?
 
       issue = result.payload[:issue]
-      update_title_for(issue)
-
-      SystemNoteService.new_alert_issue(alert, issue, user)
+      perform_after_create_tasks(issue)
 
       result
     end
@@ -56,6 +54,12 @@ def update_title_for(issue)
       issue.update!(title: "#{DEFAULT_INCIDENT_TITLE} #{issue.iid}")
     end
 
+    def perform_after_create_tasks(issue)
+      update_title_for(issue)
+
+      SystemNoteService.new_alert_issue(alert, issue, user)
+    end
+
     def error(message, issue = nil)
       ServiceResponse.error(payload: { issue: issue }, message: message)
     end
@@ -75,3 +79,5 @@ def alert_presenter
     end
   end
 end
+
+AlertManagement::CreateAlertIssueService.prepend_mod

ee/app/services/ee/alert_management/create_alert_issue_service.rb

+# frozen_string_literal: true
+
+module EE
+  module AlertManagement
+    module CreateAlertIssueService
+      extend ::Gitlab::Utils::Override
+
+      override :perform_after_create_tasks
+      def perform_after_create_tasks(issue)
+        super
+        copy_metric_images_to(issue)
+      end
+
+      private
+
+      def copy_metric_images_to(issue)
+        alert.metric_images.each do |img|
+          ::IncidentManagement::Incidents::UploadMetricService
+            .new(issue, user, { file: img.file, url: img.url, url_text: img.url_text })
+            .execute
+        end
+      end
+    end
+  end
+end

ee/spec/services/ee/alert_management/create_alert_issue_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe AlertManagement::CreateAlertIssueService do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, group: group) }
+
+  let_it_be(:alert) { create(:alert_management_alert, project: project) }
+
+  let(:created_issue) { Issue.last! }
+
+  describe '#execute' do
+    subject(:execute) { described_class.new(alert, user).execute }
+
+    before do
+      project.add_developer(user)
+      stub_licensed_features(incident_metric_upload: true)
+    end
+
+    it 'copies any metric images' do
+      image = create(:alert_metric_image, alert: alert)
+
+      execute
+
+      incident = Issue.incident.last
+
+      expect(incident.metric_images.count).to eq(1)
+
+      metric_image = incident.metric_images.first
+      expect(metric_image.url).to eq(image.url)
+      expect(metric_image.url_text).to eq(image.url_text)
+      expect(metric_image.filename).to eq(image.filename)
+      expect(metric_image.file).not_to eq(image.file)
+    end
+  end
+end