module HomeworkAttachHelper
  #判断是否具有删除的权限
  def attach_delete(project)
    if User.current.logged? && (User.current.admin? || (!Member.where('user_id = ? and project_id = ?', User.current.id, project.bid.courses.first.id).first.nil? && (Member.where('user_id = ? and project_id = ?', User.current.id, project.bid.courses.first.id).first.roles&Role.where('id = ? or id = ?', 3, 7)).size >0) || project.user_id == User.current.id)
      true
    else
      false
    end
  end
  #作业添加、编辑界面的tab页
  def homework_settings_tabs f
    @f = f
    tabs = [{:name => 'info',  :partial => 'homework_attach/edit_homework', :label => :label_information_plural},
            {:name => 'members',  :partial => 'homework_attach/homework_member', :label => :label_member_plural}
    ]
  end

  #作业可选成员列表分页
  def render_new_members_for_homework members
    #scope = Principal.active.sorted.not_member_of(project).like(params[:q])
    #scope = project.members
    principal_count = members.count
    limit = 10
    principal_pages = Redmine::Pagination::Paginator.new principal_count, limit, params['page'] #by young
    offset ||= principal_pages.offset
    principals = members[offset, limit]
    s = content_tag('div', member_check_box_tags_ex('membership[user_ids][]', principals), :id => 'principals')
    links = pagination_links_full(principal_pages, principal_count, :per_page_links => false,:remote => true)

    s + content_tag('div', content_tag('ul', links), :class => 'pagination_new')
  end

  #扩展的checkbox生成
  def member_check_box_tags_ex(name, principals)
    s = ''
    principals.each do |member|
      s << "<label>#{ check_box_tag name, member.id, false, :id => nil } #{h member.user.name }</label>\n"
    end
    s.html_safe
  end
end