#coding=utf-8

class ResourcesService

  #发送资源到课程
  def send_resource_to_course user,params
    send_id  = params[:send_id]
    @ori = Attachment.find_by_id(send_id)
    course_ids = params[:course_ids]
    @flag = false
    unless course_ids.nil?
      course_ids.each do |id|
        next if @ori.blank?
        @exist = false
        Course.find(id).attachments.each do |att|  #如果课程中包含该资源
          if att.id == @ori.id || (!att.copy_from.nil? && !@ori.copy_from.nil? && att.copy_from == @ori.copy_from) || att.copy_from == @ori.id || att.id == @ori.copy_from
            att.created_on = Time.now
            att.save
            @exist = true
            @flag = true
            break
          end
        end
        next if @exist
        attach_copied_obj = @ori.copy
        attach_copied_obj.tag_list.add(@ori.tag_list) # tag关联
        attach_copied_obj.container = Course.find(id)
        attach_copied_obj.created_on = Time.now
        attach_copied_obj.author_id = user.id
        attach_copied_obj.is_public = 0
        attach_copied_obj.copy_from = @ori.copy_from.nil? ? @ori.id : @ori.copy_from #发送要添加copy_from
        if attach_copied_obj.attachtype == nil
          attach_copied_obj.attachtype = 4
        end
        if attach_copied_obj.save
          # 更新引用次数
          quotes = @ori.quotes.to_i + 1
          @ori.update_attribute(:quotes, quotes) unless @ori.nil?
          @ori.forwards << Forward.new(:to_type => attach_copied_obj.class.name, :to_id => attach_copied_obj.id,:created_at => Time.now)
          @flag = true
        else
          @flag = false
          @save_message = attach_copied_obj.errors.full_messages
          break
        end

      end
    end

    [@ori, @flag, @save_message]
  end

  # 我的资源-课件 已发布的
  def all_course_attachments user

    courses = user.courses.not_deleted

    courses_ids = courses.empty? ? '(-1)' :"(" + courses.map(&:id).join(",") + ")"

    attchments = Attachment.where("(author_id = #{user.id} and is_publish = 1 and container_id in #{courses_ids} and container_type = 'Course') or (container_type = 'Course' and is_publish = 1 and container_id in #{courses_ids})" ).order("created_on desc")

    attchments
  end

  # 我的资源-作业  已发布的
  def all_homework_commons user

    courses = user.courses.not_deleted

    courses_ids = courses.empty? ? '(-1)' :"(" + courses.map(&:id).join(",") + ")"

    homeworks = HomeworkCommon.where("course_id in #{courses_ids} and publish_time <= ?",Time.now.strftime("%Y-%m-%d")).order("created_at desc")

    homeworks
  end

  # 我的资源-测验 已发布的
  def all_exercises user

    courses = user.courses.not_deleted

    courses_ids = courses.empty? ? '(-1)' :"(" + courses.map(&:id).join(",") + ")"

    exercises = Exercise.where("exercise_status <> 1 and course_id in #{courses_ids}").order("created_at desc")

    exercises
  end

end