class GitTagPushService
  attr_accessor :project, :user, :push_data

  def execute(project, user, oldrev, newrev, ref)
    @project, @user = project, user
    @push_data = create_push_data(oldrev, newrev, ref)

    create_push_event
    project.repository.expire_cache
    project.execute_hooks(@push_data.dup, :tag_push_hooks)
  end

  private

  def create_push_data(oldrev, newrev, ref)
    data = {
      ref: ref,
      before: oldrev,
      after: newrev,
      user_id: user.id,
      user_name: user.name,
      project_id: project.id,
      repository: {
        name: project.name,
        url: project.url_to_repo,
        description: project.description,
        homepage: project.web_url
      }
    }
  end

  def create_push_event
    Event.create!(
      project: project,
      action: Event::PUSHED,
      data: push_data,
      author_id: push_data[:user_id]
    )
  end
end