Pass alert bot user when creaeting incidents

Previously, we passed `nil` as `current_user` to
`IncidentManagement::CreateIssueService.new` and used `issue_author`.

After this commit we pass `User.alert_bot` explicitly and utilize
`current_user` in the service as usual.

ee/app/services/incident_management/create_issue_service.rb

@@ -13,6 +13,10 @@ module IncidentManagement
       DESCRIPTION
     }.freeze
 
+    def initialize(project, params)
+      super(project, User.alert_bot, params)
+    end
+
     def execute
       return error_with('setting disabled') unless incident_management_setting.create_issue?
       return error_with('invalid alert') unless alert.valid?
@@ -42,19 +46,13 @@ module IncidentManagement
     def do_create_issue(**params)
       Issues::CreateService.new(
         project,
-        issue_author,
+        current_user,
         title: issue_title,
         description: issue_description,
         **params
       ).execute
     end
 
-    def issue_author
-      strong_memoize(:issue_author) do
-        User.alert_bot
-      end
-    end
-
     def issue_title
       alert.full_title
     end
@@ -77,7 +75,7 @@ module IncidentManagement
 
     def find_or_create_label(**params)
       Labels::FindOrCreateService
-        .new(issue_author, project, **params)
+        .new(current_user, project, **params)
         .execute
     end
 

ee/app/workers/incident_management/process_alert_worker.rb

@@ -21,7 +21,7 @@ module IncidentManagement
 
     def create_issue(project, alert)
       IncidentManagement::CreateIssueService
-        .new(project, nil, alert)
+        .new(project, alert)
         .execute
     end
   end

ee/spec/services/incident_management/create_issue_service_spec.rb

@@ -4,7 +4,8 @@ require 'spec_helper'
 
 describe IncidentManagement::CreateIssueService do
   let(:project) { create(:project, :repository, :private) }
-  let(:service) { described_class.new(project, nil, alert_payload) }
+  let(:user) { User.alert_bot }
+  let(:service) { described_class.new(project, alert_payload) }
   let(:alert_starts_at) { Time.now }
   let(:alert_title) { 'TITLE' }
   let(:alert_annotations) { { title: alert_title } }
@@ -38,7 +39,7 @@ describe IncidentManagement::CreateIssueService do
       it 'creates an issue with alert summary only' do
         expect(subject).to include(status: :success)
 
-        expect(issue.author).to eq(User.alert_bot)
+        expect(issue.author).to eq(user)
         expect(issue.title).to eq(alert_title)
         expect(issue.description).to include(alert_presenter.issue_summary_markdown)
         expect(separator_count(issue.description)).to eq 0
@@ -164,7 +165,7 @@ describe IncidentManagement::CreateIssueService do
 
         expect(subject).to include(status: :success)
 
-        expect(issue.author).to eq(User.alert_bot)
+        expect(issue.author).to eq(user)
         expect(issue.title).to eq(alert_presenter.full_title)
         expect(issue.title).to include(gitlab_alert.environment.name)
         expect(issue.title).to include(query_title)

ee/spec/workers/incident_management/process_alert_worker_spec.rb

@@ -15,7 +15,7 @@ describe IncidentManagement::ProcessAlertWorker do
       expect(Project).to receive(:find_by_id).and_call_original
 
       expect(IncidentManagement::CreateIssueService)
-        .to receive(:new).with(project, nil, :alert)
+        .to receive(:new).with(project, :alert)
         .and_return(create_issue_service)
 
       expect(create_issue_service).to receive(:execute)