Abstract with release presenter

This commit abstracts FE specific code with release presenter

app/models/release.rb

 # frozen_string_literal: true
 
 class Release < ApplicationRecord
+  include Presentable
   include CacheMarkdownField
   include Gitlab::Utils::StrongMemoize
 

app/presenters/release_presenter.rb

+# frozen_string_literal: true
+
+class ReleasePresenter < Gitlab::View::Presenter::Delegated
+  include ActionView::Helpers::UrlHelper
+
+  presents :release
+
+  delegate :project, :tag, to: :release
+
+  def commit_path
+    return unless release.commit && can_download_code?
+
+    project_commit_path(project, release.commit.id)
+  end
+
+  def tag_path
+    return unless can_download_code?
+
+    project_tag_path(project, release.tag)
+  end
+
+  def merge_requests_url
+    return unless release_mr_issue_urls_available?
+
+    project_merge_requests_url(project, params_for_issues_and_mrs)
+  end
+
+  def issues_url
+    return unless release_mr_issue_urls_available?
+
+    project_issues_url(project, params_for_issues_and_mrs)
+  end
+
+  private
+
+  def can_download_code?
+    can?(current_user, :download_code, project)
+  end
+
+  def params_for_issues_and_mrs
+    { scope: 'all', state: 'opened', release_tag: release.tag }
+  end
+
+  def release_mr_issue_urls_available?
+    ::Feature.enabled?(:release_mr_issue_urls, project)
+  end
+end

lib/api/entities.rb

@@ -1291,6 +1291,8 @@ module API
     end
 
     class Release < Grape::Entity
+      include ::API::Helpers::Presentable
+
       expose :name
       expose :tag, as: :tag_name, if: ->(_, _) { can_download_code? }
       expose :description
@@ -1303,8 +1305,8 @@ module API
       expose :commit, using: Entities::Commit, if: ->(_, _) { can_download_code? }
       expose :upcoming_release?, as: :upcoming_release
       expose :milestones, using: Entities::Milestone, if: -> (release, _) { release.milestones.present? }
-      expose :commit_path, if: ->(_, _) { can_download_code? }
-      expose :tag_path, if: ->(_, _) { can_download_code? }
+      expose :commit_path, expose_nil: false
+      expose :tag_path, expose_nil: false
       expose :assets do
         expose :assets_count, as: :count do |release, _|
           assets_to_exclude = can_download_code? ? [] : [:sources]
@@ -1316,8 +1318,8 @@ module API
         end
       end
       expose :_links do
-        expose :merge_requests_url, if: -> (_) { release_mr_issue_urls_available? }
-        expose :issues_url, if: -> (_) { release_mr_issue_urls_available? }
+        expose :merge_requests_url, expose_nil: false
+        expose :issues_url, expose_nil: false
       end
 
       private
@@ -1325,36 +1327,6 @@ module API
       def can_download_code?
         Ability.allowed?(options[:current_user], :download_code, object.project)
       end
-
-      def commit_path
-        return unless object.commit
-
-        Gitlab::Routing.url_helpers.project_commit_path(project, object.commit.id)
-      end
-
-      def tag_path
-        Gitlab::Routing.url_helpers.project_tag_path(project, object.tag)
-      end
-
-      def merge_requests_url
-        Gitlab::Routing.url_helpers.project_merge_requests_url(project, params_for_issues_and_mrs)
-      end
-
-      def issues_url
-        Gitlab::Routing.url_helpers.project_issues_url(project, params_for_issues_and_mrs)
-      end
-
-      def params_for_issues_and_mrs
-        { scope: 'all', state: 'opened', release_tag: object.tag }
-      end
-
-      def release_mr_issue_urls_available?
-        ::Feature.enabled?(:release_mr_issue_urls, project)
-      end
-
-      def project
-        @project ||= object.project
-      end
     end
 
     class Tag < Grape::Entity

spec/presenters/release_presenter_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ReleasePresenter do
+  include Gitlab::Routing.url_helpers
+
+  let_it_be(:project) { create(:project, :repository) }
+  let(:developer) { create(:user) }
+  let(:guest) { create(:user) }
+  let(:user) { developer }
+  let(:release) { create(:release, project: project) }
+  let(:presenter) { described_class.new(release, current_user: user) }
+
+  before do
+    project.add_developer(developer)
+    project.add_guest(guest)
+  end
+
+  describe '#commit_path' do
+    subject { presenter.commit_path }
+
+    it 'returns commit path' do
+      is_expected.to eq(project_commit_path(project, release.commit.id))
+    end
+
+    context 'when commit is not found' do
+      let(:release) { create(:release, project: project, sha: 'not-found') }
+
+      it { is_expected.to be_nil }
+    end
+
+    context 'when user is guest' do
+      let(:user) { guest }
+
+      it { is_expected.to be_nil }
+    end
+  end
+
+  describe '#tag_path' do
+    subject { presenter.tag_path }
+
+    it 'returns tag path' do
+      is_expected.to eq(project_tag_path(project, release.tag))
+    end
+
+    context 'when user is guest' do
+      let(:user) { guest }
+
+      it { is_expected.to be_nil }
+    end
+  end
+
+  describe '#merge_requests_url' do
+    subject { presenter.merge_requests_url }
+
+    it 'returns merge requests url' do
+      is_expected.to match /#{project_merge_requests_url(project)}/
+    end
+
+    context 'when release_mr_issue_urls feature flag is disabled' do
+      before do
+        stub_feature_flags(release_mr_issue_urls: false)
+      end
+
+      it { is_expected.to be_nil }
+    end
+  end
+
+  describe '#issues_url' do
+    subject { presenter.issues_url }
+
+    it 'returns merge requests url' do
+      is_expected.to match /#{project_issues_url(project)}/
+    end
+
+    context 'when release_mr_issue_urls feature flag is disabled' do
+      before do
+        stub_feature_flags(release_mr_issue_urls: false)
+      end
+
+      it { is_expected.to be_nil }
+    end
+  end
+end