# require 'zip'
# class ZipdownController < ApplicationController
#   #查找项目（课程）
#   before_filter :find_project_by_bid_id, :only => [:assort]
#   #检查权限
#   #勿删 before_filter :authorize, :only => [:assort,:download_user_homework]
#   SAVE_FOLDER = "#{Rails.root}/files"
#   OUTPUT_FOLDER = "#{Rails.root}/tmp/archiveZip"
#
#
#   def assort
#     if params[:obj_class] == "Bid"
#       bid = Bid.find params[:obj_id]
#       file_count = 0
#       bid.homeworks.map { |homework| file_count += homework.attachments.count}
#       if file_count > 0
#         zipfile = zip_bid bid
#       else
#         render file: 'public/no_file_found.html'
#       end
#     else
#       logger.error "[ZipDown#assort] ===> #{params[:obj_class]} unKown !!"
#     end
#     send_file zipfile, :filename => bid.name + ".zip", :type => detect_content_type(zipfile) if zipfile
#
#   #rescue Exception => e
#   #  render file: 'public/no_file_found.html'
#   end
#
#   #下载某一学生的作业的所有文件
#   def download_user_homework
#     homework = HomeworkAttach.find params[:homework]
#     if User.current.admin? || User.current.member_of_course?(homework.bid.courses.first)
#       if homework != nil
#         unless homework.attachments.empty?
#           zipfile = zip_homework_by_user homework
#           send_file zipfile, :filename =>  ((homework.user.user_extensions.nil? || homework.user.user_extensions.student_id.nil?) ? "" : homework.user.user_extensions.student_id) +
#               "_" + (homework.user.lastname.nil? ? "" : homework.user.lastname) + (homework.user.firstname.nil? ? "" : homework.user.firstname) +
#               "_" + homework.name + ".zip", :type => detect_content_type(zipfile) if(zipfile)
#         else
#           render file: 'public/no_file_found.html'
#         end
#       else
#         render file: 'public/file_not_found.html'
#       end
#     else
#       render_403
#     end
#   #rescue => e
#   #  render file: 'public/file_not_found.html'
#   end
#
#   private
#
#   #通过作业Id找到项目（课程）
#   def find_project_by_bid_id
#     obj_class = params[:obj_class]
#     obj_id = params[:obj_id]
#     obj = obj_class.constantize.find(obj_id)
#     case obj.class.to_s.to_sym
#       when :Bid
#         @project = obj.courses[0]
#     end
#   end
#
#   def zip_bid(bid)
#     # Todo: User Access Controll
#     bid_homework_path = []
#     bid.homeworks.each do |homeattach|
#       unless homeattach.attachments.empty?
#         bid_homework_path << zip_homework_by_user(homeattach)
#       end
#     end
#     zipping "#{Time.now.to_i}_#{bid.name}.zip", bid_homework_path, OUTPUT_FOLDER
#   end
#
#   def zip_homework_by_user(homeattach)
#     homeworks_attach_path = []
#     not_exist_file = []
#     # 需要将所有homework.attachments遍历加入zip
#     # 并且返回zip路径
#     homeattach.attachments.each do |attach|
#       if File.exist?(attach.diskfile)
#         homeworks_attach_path << attach.diskfile
#       else
#         not_exist_file << attach.filename
#       end
#     end
#     zipping("#{homeattach.user.lastname}#{homeattach.user.firstname}_#{((homeattach.user.user_extensions.nil? || homeattach.user.user_extensions.student_id.nil?) ? "" : homeattach.user.user_extensions.student_id)}_#{Time.now.to_i.to_s}.zip", homeworks_attach_path, OUTPUT_FOLDER, true, not_exist_file)
#   end
#
#
#   def zipping(zip_name_refer, files_paths, output_path, is_attachment=false, not_exist_file=[])
#     # 输入待打包的文件列表，已经打包文件定位到ouput_path
#     ic = Iconv.new('GBK//IGNORE', 'UTF-8//IGNORE')
#     input_filename = files_paths
#
#     rename_zipfile = zip_name_refer ||= "#{Time.now.to_i.to_s}.zip"
#     zipfile_name = "#{output_path}/#{rename_zipfile}"
#
#     Dir.mkdir(File.dirname(zipfile_name)) unless File.exist?(File.dirname(zipfile_name))
#
#     Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
#       input_filename.each do |filename|
#         flag = true
#         index = 1
#         rename_file = ic.iconv( (File.basename(filename)) ).to_s
#         rename_file = ic.iconv( filename_to_real( File.basename(filename))).to_s if is_attachment
#
#         begin
#           zipfile.add(rename_file, filename)
#           flag = false
#         rescue Exception => e
#           zipfile.get_output_stream('FILE_NOTICE.txt') do |os|
#             os.write l(:label_file_exist)
#           end
#           next
#         end
#       end
#       unless not_exist_file.empty?
#         zipfile.get_output_stream('FILE_LOST.txt') do |os|
#           os.write l(:label_file_lost) + not_exist_file.join(',').to_s
#         end
#       end
#     end
#     zipfile_name
#   #rescue Errno => e
#   #  logger.error "[zipdown#zipping] ===> #{e}"
#   #  @error = e
#   end
#   def detect_content_type(name)
#     content_type = Redmine::MimeType.of(name)
#     content_type.to_s
#   end
#
#   def filename_to_real(name)
#     attach = Attachment.find_by_disk_filename(name)
#     attach.filename
#   end
# end