class Hiiro::TaskManager

def tasks
  if scope == :subtask
    parent = current_parent_task
    return [] unless parent
    main_task = Task.new(name: "#{parent.name}/main", tree: parent.tree_name, session: parent.session_name)
    subtask_list = environment.all_tasks.select { |t| t.parent_name == parent.name }
    [main_task, *subtask_list]
  else
    environment.all_tasks.select(&:top_level?)
  end
end