Add model for tracking published issues

To support an ability to publish status page issues
at a user's discretion, we want to store whether an
issue has been published. This adds a table and model
to represent a published incident.

changelogs/unreleased/sy-publish-status.yml

+---
+title: Add table for tracking issues published to status page
+merge_request: 29994
+author:
+type: added

db/migrate/20200416005331_create_status_page_published_incidents.rb

+# frozen_string_literal: true
+
+class CreateStatusPagePublishedIncidents < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      create_table :status_page_published_incidents do |t|
+        t.timestamps_with_timezone null: false
+        t.references :issue, null: false, index: { unique: true }, foreign_key: { on_delete: :cascade }
+      end
+    end
+  end
+
+  def down
+    drop_table :status_page_published_incidents
+  end
+end

db/structure.sql

@@ -6098,6 +6098,22 @@ CREATE SEQUENCE public.sprints_id_seq
 
 ALTER SEQUENCE public.sprints_id_seq OWNED BY public.sprints.id;
 
+CREATE TABLE public.status_page_published_incidents (
+    id bigint NOT NULL,
+    issue_id bigint NOT NULL,
+    created_at timestamp with time zone NOT NULL,
+    updated_at timestamp with time zone NOT NULL
+);
+
+CREATE SEQUENCE public.status_page_published_incidents_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+ALTER SEQUENCE public.status_page_published_incidents_id_seq OWNED BY public.status_page_published_incidents.id;
+
 CREATE TABLE public.status_page_settings (
     project_id bigint NOT NULL,
     created_at timestamp with time zone NOT NULL,
@@ -7618,6 +7634,8 @@ ALTER TABLE ONLY public.spam_logs ALTER COLUMN id SET DEFAULT nextval('public.sp
 
 ALTER TABLE ONLY public.sprints ALTER COLUMN id SET DEFAULT nextval('public.sprints_id_seq'::regclass);
 
+ALTER TABLE ONLY public.status_page_published_incidents ALTER COLUMN id SET DEFAULT nextval('public.status_page_published_incidents_id_seq'::regclass);
+
 ALTER TABLE ONLY public.status_page_settings ALTER COLUMN project_id SET DEFAULT nextval('public.status_page_settings_project_id_seq'::regclass);
 
 ALTER TABLE ONLY public.subscriptions ALTER COLUMN id SET DEFAULT nextval('public.subscriptions_id_seq'::regclass);
@@ -8547,6 +8565,9 @@ ALTER TABLE ONLY public.spam_logs
 ALTER TABLE ONLY public.sprints
     ADD CONSTRAINT sprints_pkey PRIMARY KEY (id);
 
+ALTER TABLE ONLY public.status_page_published_incidents
+    ADD CONSTRAINT status_page_published_incidents_pkey PRIMARY KEY (id);
+
 ALTER TABLE ONLY public.status_page_settings
     ADD CONSTRAINT status_page_settings_pkey PRIMARY KEY (project_id);
 
@@ -10375,6 +10396,8 @@ CREATE INDEX index_sprints_on_title ON public.sprints USING btree (title);
 
 CREATE INDEX index_sprints_on_title_trigram ON public.sprints USING gin (title public.gin_trgm_ops);
 
+CREATE UNIQUE INDEX index_status_page_published_incidents_on_issue_id ON public.status_page_published_incidents USING btree (issue_id);
+
 CREATE INDEX index_status_page_settings_on_project_id ON public.status_page_settings USING btree (project_id);
 
 CREATE INDEX index_subscriptions_on_project_id ON public.subscriptions USING btree (project_id);
@@ -11668,6 +11691,9 @@ ALTER TABLE ONLY public.dependency_proxy_group_settings
 ALTER TABLE ONLY public.group_deploy_tokens
     ADD CONSTRAINT fk_rails_61a572b41a FOREIGN KEY (group_id) REFERENCES public.namespaces(id) ON DELETE CASCADE;
 
+ALTER TABLE ONLY public.status_page_published_incidents
+    ADD CONSTRAINT fk_rails_61e5493940 FOREIGN KEY (issue_id) REFERENCES public.issues(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY public.deployment_clusters
     ADD CONSTRAINT fk_rails_6359a164df FOREIGN KEY (deployment_id) REFERENCES public.deployments(id) ON DELETE CASCADE;
 
@@ -13417,6 +13443,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200415161021
 20200415161206
 20200415192656
+20200416005331
 20200416111111
 20200416120128
 20200416120354

ee/app/models/ee/issue.rb

@@ -39,6 +39,8 @@ module EE
         end
       end
 
+      has_one :status_page_published_incident, class_name: 'StatusPage::PublishedIncident', inverse_of: :issue
+
       has_and_belongs_to_many :self_managed_prometheus_alert_events, join_table: :issues_self_managed_prometheus_alert_events
       has_and_belongs_to_many :prometheus_alert_events, join_table: :issues_prometheus_alert_events
       has_many :prometheus_alerts, through: :prometheus_alert_events

ee/app/models/status_page/published_incident.rb

+# frozen_string_literal: true
+
+module StatusPage
+  # Corresponds to an issue which has been published to a
+  # status-page app's AWS bucket.
+  class PublishedIncident < ApplicationRecord
+    self.table_name = "status_page_published_incidents"
+
+    belongs_to :issue, inverse_of: :status_page_published_incident
+    validates :issue, presence: true
+  end
+end

ee/spec/factories/status_page/published_incident.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :status_page_published_incident, class: '::StatusPage::PublishedIncident' do
+    issue
+  end
+end

ee/spec/models/issue_spec.rb

@@ -178,6 +178,7 @@ describe Issue do
     it { is_expected.to have_many(:related_vulnerabilities).through(:vulnerability_links).source(:vulnerability) }
     it { is_expected.to belong_to(:promoted_to_epic).class_name('Epic') }
     it { is_expected.to have_many(:resource_weight_events) }
+    it { is_expected.to have_one(:status_page_published_incident) }
 
     describe 'versions.most_recent' do
       it 'returns the most recent version' do

ee/spec/models/status_page/published_incident_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe StatusPage::PublishedIncident do
+  describe 'associations' do
+    it { is_expected.to belong_to(:issue).inverse_of(:status_page_published_incident) }
+  end
+
+  describe 'validation' do
+    it { is_expected.to validate_presence_of(:issue) }
+  end
+end

spec/lib/gitlab/import_export/all_models.yml

@@ -41,6 +41,7 @@ issues:
 - user_mentions
 - system_note_metadata
 - alert_management_alert
+- status_page_published_incident
 events:
 - author
 - project
@@ -636,3 +637,5 @@ epic_issue:
 system_note_metadata:
 - note
 - description_version
+status_page_published_incident:
+- issue