socialforge/app/helpers/files_helper.rb

# encoding: utf-8
module FilesHelper

  def downloadAll containers
    paths = []
    files = []
    tmpfile = "tmp.zip"

    containers.each do |container|
      next if container.attachments.empty?
      if container.is_a?(Version);end
      container.attachments.each do |attachment|
        paths << attachment.diskfile
        file = attachment.diskfile
        # logger.error "[FilesHelper] downloadAll: #{e}"
        begin
          File.new(file, "r")
        rescue Exception => e
          logger.error e
          next
        end
        files << file
      # zip.add(file.path.dup.sub(directory, ''), file.path)
      end
    end

    zipfile_name = "archive.zip"
    if File.exists? File.open(zipfile_name, "w+")
      ff = File.open(zipfile_name, "w+")
      ff.close
      File.delete ff
    end 
    Zip::ZipFile.open(zipfile_name, Zip::ZipFile::CREATE) do |zipfile|
      files.each do |filename|
        directory = File.dirname filename
        # Two arguments:
        # - The name of the file as it will appear in the archive
        # - The original file, including the path to find it
        dir = filename.sub(directory+"/", '')
        zipfile.add(dir, filename)
        
      end
    end
    File.new(zipfile_name,'w+')
  end

  def courses_check_box_tags(name,courses,current_course,attachment)
    s = ''
    courses.each do |course|
      if !(attachment.container_type && attachment.container_id == course.id)  && is_course_teacher(User.current,course) && course_in_current_or_next_term(course)
        s << "<label>#{ check_box_tag name, course.id, false, :id => nil } #{h course.name}</label>&nbsp;[#{get_course_term course}]<br/>"
      end
    end
    s.html_safe
  end

  #判断用户是否拥有除current_course以外的课程，需用户在该课程中角色为教师且该课程属于当前学期或下一学期
  def has_course? user,current_course
    result = false
    user.courses.each do |course|
      if current_course.id != course.id && is_course_teacher(User.current,course) && course_in_current_or_next_term(course)
        return true
      end
    end
    result
  end

  # 判断指定的资源时候符合类型
  def isTypeOk(attachment, type, contentType)
    result = false
    if type != 0
      if attachment.attachtype == type
        result = true
      end
    else
      result = true
    end
    if  result
      if contentType != '0' && contentType != attachment.suffix_type
        result = false
      end
    end
    result
  end

  def visable_attachemnts attachments
    result = []
    attachments.each do |attachment|
      if attachment.is_public? || (attachment.container_type == "Course" && attachment.author.member_of_course?(Course.find(attachment.container_id)))|| attachment.author_id == User.current.id
        result << attachment
      end
    end
    result
  end

  def visable_attachemnts_incourse attachments
    result = []
    attachments.each do |attachment|
      if attachment.is_public? || (attachment.author.member_of_course?(Course.find(attachment.container_id)))|| attachment.author_id == User.current.id
        result << attachment
      end
    end
    result
  end

  def visable_attachemnts_insite attachments,course
    result = []
    attachments.each do |attachment|
      if attachment.is_public? || (attachment.container_type == "Course" && attachment.container_id == course.id  && attachment.author.member_of_course?(Course.find(attachment.container_id)))|| attachment.author_id == User.current.id
        result << attachment
      end
    end
    result
  end


  def get_qute_number attachment
    if attachment.copy_from
      result = Attachment.find_by_sql("select count(*) as number from attachments where copy_from = #{attachment.copy_from}")
    else
      result = Attachment.find_by_sql("select count(*) as number from attachments where copy_from = #{attachment.id}")
    end
    if result.nil? || result.count <= 0
      return 0
    else
      return result[0].number
    end
  end
end