Add security dashboard projects relation to users

* Adds users_security_dashboard_projects table
  * References users and projects
* Adds has_many security_dashboard_projects to User

https://gitlab.com/gitlab-org/gitlab/issues/33896

changelogs/unreleased/33896-security-dashboard-projects.yml

+---
+title: Create a users_security_dashboard_projects table to store the projects a user has added to their personal security dashboard
+merge_request: 18708
+author:
+type: added

db/migrate/20191017001326_create_users_security_dashboard_projects.rb

+# frozen_string_literal: true
+
+class CreateUsersSecurityDashboardProjects < ActiveRecord::Migration[5.2]
+  DOWNTIME = false
+  INDEX_NAME = 'users_security_dashboard_projects_unique_index'
+
+  def change
+    create_table :users_security_dashboard_projects, id: false do |t|
+      t.references :user, null: false, foreign_key: { on_delete: :cascade }
+      t.references :project, null: false, index: false, foreign_key: { on_delete: :cascade }
+    end
+
+    add_index :users_security_dashboard_projects, [:project_id, :user_id], name: INDEX_NAME, unique: true
+  end
+end

db/schema.rb

@@ -3888,6 +3888,13 @@ ActiveRecord::Schema.define(version: 2019_11_05_094625) do
     t.index ["user_id", "project_id"], name: "index_users_ops_dashboard_projects_on_user_id_and_project_id", unique: true
   end
 
+  create_table "users_security_dashboard_projects", id: false, force: :cascade do |t|
+    t.bigint "user_id", null: false
+    t.bigint "project_id", null: false
+    t.index ["project_id", "user_id"], name: "users_security_dashboard_projects_unique_index", unique: true
+    t.index ["user_id"], name: "index_users_security_dashboard_projects_on_user_id"
+  end
+
   create_table "users_star_projects", id: :serial, force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "user_id", null: false
@@ -4472,6 +4479,8 @@ ActiveRecord::Schema.define(version: 2019_11_05_094625) do
   add_foreign_key "users", "namespaces", column: "managing_group_id", name: "fk_a4b8fefe3e", on_delete: :nullify
   add_foreign_key "users_ops_dashboard_projects", "projects", on_delete: :cascade
   add_foreign_key "users_ops_dashboard_projects", "users", on_delete: :cascade
+  add_foreign_key "users_security_dashboard_projects", "projects", on_delete: :cascade
+  add_foreign_key "users_security_dashboard_projects", "users", on_delete: :cascade
   add_foreign_key "users_star_projects", "projects", name: "fk_22cd27ddfc", on_delete: :cascade
   add_foreign_key "vulnerabilities", "epics", name: "fk_1d37cddf91", on_delete: :nullify
   add_foreign_key "vulnerabilities", "milestones", column: "due_date_sourcing_milestone_id", name: "fk_7c5bb22a22", on_delete: :nullify

ee/app/models/ee/user.rb

@@ -42,6 +42,8 @@ module EE
 
       has_many :users_ops_dashboard_projects
       has_many :ops_dashboard_projects, through: :users_ops_dashboard_projects, source: :project
+      has_many :users_security_dashboard_projects
+      has_many :security_dashboard_projects, through: :users_security_dashboard_projects, source: :project
 
       has_many :group_saml_identities, -> { where.not(saml_provider_id: nil) }, source: :identities, class_name: "::Identity"
 

ee/app/models/users_security_dashboard_project.rb

+# frozen_string_literal: true
+
+class UsersSecurityDashboardProject < ApplicationRecord
+  SECURITY_DASHBOARD_PROJECTS_LIMIT = 1000
+
+  belongs_to :project
+  belongs_to :user
+
+  validates :user, presence: true
+  validates :project, presence: true
+  validates :project_id, uniqueness: { scope: [:user_id] }
+  validate :per_user_projects_limit
+
+  private
+
+  def per_user_projects_limit
+    if self.class.where(user: user).count >= SECURITY_DASHBOARD_PROJECTS_LIMIT
+      errors.add(:project, _('limit of %{project_limit} reached') % { project_limit: SECURITY_DASHBOARD_PROJECTS_LIMIT })
+    end
+  end
+end

ee/spec/factories/users_security_dashboard_project.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :users_security_dashboard_project do
+    user
+    project
+  end
+end

ee/spec/models/user_spec.rb

@@ -24,6 +24,8 @@ describe User do
     it { is_expected.to have_many(:reviews) }
     it { is_expected.to have_many(:vulnerability_feedback) }
     it { is_expected.to have_many(:path_locks).dependent(:destroy) }
+    it { is_expected.to have_many(:users_security_dashboard_projects) }
+    it { is_expected.to have_many(:security_dashboard_projects) }
   end
 
   describe 'nested attributes' do

ee/spec/models/users_security_dashboard_project_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe UsersSecurityDashboardProject do
+  subject { build(:users_security_dashboard_project) }
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:project) }
+    it { is_expected.to belong_to(:user) }
+  end
+
+  describe 'validations' do
+    it { is_expected.to validate_presence_of(:user) }
+    it { is_expected.to validate_presence_of(:project) }
+    it { is_expected.to validate_uniqueness_of(:project_id).scoped_to(:user_id) }
+
+    context 'when validating the number of projects a user can add to their dashboard' do
+      before do
+        stub_const("UsersSecurityDashboardProject::SECURITY_DASHBOARD_PROJECTS_LIMIT", 1)
+      end
+
+      it 'limits the number of projects per user' do
+        user = create(:user)
+        create(:users_security_dashboard_project, user: user)
+
+        dashboard_project = build(:users_security_dashboard_project, user: user)
+
+        expect(dashboard_project).to be_invalid
+        expect(dashboard_project.errors.full_messages).to include('Project limit of 1 reached')
+      end
+
+      it 'allows a user to add a project if they are under the limit' do
+        dashboard_project = build(:users_security_dashboard_project)
+
+        expect(dashboard_project).to be_valid
+      end
+    end
+  end
+end

locale/gitlab.pot

@@ -20300,6 +20300,9 @@ msgstr ""
 msgid "leave %{group_name}"
 msgstr ""
 
+msgid "limit of %{project_limit} reached"
+msgstr ""
+
 msgid "locked by %{path_lock_user_name} %{created_at}"
 msgstr ""