socialforge/app/helpers/api_helper.rb

# encoding: utf-8
module ApiHelper
  #获取用户的工作单位
  def get_user_work_unit user
    work_unit = ""
    if user.user_extensions.identity == 0 || user.user_extensions.identity == 1
      work_unit = user.user_extensions.school.name unless  user.user_extensions.school.nil?
    elsif  user.user_extensions.identity == 3
      work_unit = user.user_extensions.occupation
    elsif user.user_extensions.identity == 2
      work_unit = user.firstname
    end
    work_unit
  end

  #获取用户地区
  def get_user_location user
    location = ""
    location << (user.user_extensions.location || '')
    location << (user.user_extensions.location_city || '')
    location
  end


  def get_assigned_homeworks(homeworks, n, index)
    homeworks += homeworks
    homeworks[index + 1 .. index + n]
  end


  def stars_to_json_like starts,show_jour,homework,show_name
    result = []
    starts.each do |s|
      comment = get_homework_review homework,show_jour,s.rater
      rater_name = show_name ? s.rater.login : l(:label_anonymous)
      rater_id = show_name ? s.rater.id : ''
      result << {:rater_id =>rater_id ,:rater_name => rater_name,:created_at => format_time(s.created_at),:stars => s.stars,:comment => comment}
    end
    result
  end

  #########################################################
  #sw
  #获取课程未匿评数量
  #param: user => "用户", course_id => "查询的课程ID"
  #return: 作业的数量
  #########################################################
  def get_course_anonymous_evaluation user,course
    count = 0
    if course
      is_teacher = is_course_teacher user,course
      if is_teacher #如果是老师，显示学生提交的作业数
        course.homeworks.each do |bid|
          count += bid.homeworks.count
        end
      else #如果是学生，显示未匿评的数量
        course.homeworks.each do |bid|
          count += get_student_not_batch_homework_list bid,user
        end
      end
    end
    [count,is_teacher]
  end

  def get_user_language user
    (user.language.nil? || user.language == "") ? 'zh':user.language
  end

  # 学生获取课程作业的状态
  def get_homework_status homework
    homework_status = ""
       if !homework.nil?
         if  homework.homework_type == 1 && homework.homework_detail_manual
           case homework.homework_detail_manual.comment_status
             when 1
               homework_status = show_homework_deadline homework
             when 2
               homework_status = "正在匿评"
             when 3
               homework_status = "匿评结束"
           end
         elsif homework.homework_type == 0
           homework_status = "未启用匿评"
         elsif homework.homework_type == 2
           homework_status = "编程作业"
         else
         end
       end
    homework_status
  end

  #获取作业的是否可以匿评的描述
  def homework_status_desc homework
    if homework.homework_type == 1 && homework.homework_detail_manual #匿评作业
      if Time.parse(homework.end_time.to_s).strftime("%Y-%m-%d") >= Time.now.strftime("%Y-%m-%d")
        link = show_homework_deadline homework
      elsif homework.student_works.count >= 2 #作业份数大于2
        case homework.homework_detail_manual.comment_status
          when 1
            link =  '启动匿评'
          when 2
            link =  '关闭匿评'
          when 3
            link = " 匿评结束"
        end
      else
        link = "提交作业数过少"
      end
    else
      link = "未开启匿评作业"
    end
    link
  end

  #获取
  def get_submit_sutdent_list homework
    studentlist = []
    if homework.is_a?(Hash) && homework.key?(:studentlist)
      studentlist = homework[:studentlist]
    else
      homework.student_works.order("created_at desc").page(1).per(6).each do |work|
            studentlist << work.user
      end
    end
    studentlist
  end

  #计算作业的截止日期，剩余日期
  def show_homework_deadline homework
   day = 0
    if (day = (Date.parse(homework.end_time.to_s) - Date.parse(Time.now.to_s)).to_i) > 0
      "距作业截止还有" << day.to_s << "天"
    else
      "已截止，但可补交"
    end
  end

  #获取作业中学生的匿评比率
  # 匿评比率 = 学生总共评价的作业的作业份数  /  作业份数 * 分配数 * 100%
  # 教辅匿评比率 = 教辅已经评价的作业份数 / 总的作业份数 * 100%
  def get_evaluation_part homework,role
    homework_eva_completed_task_num = 0
    homework_eva_task_num = 0
    #匿评作业 # 且匿评状态不是还没有开启匿评
    if homework.homework_type == 1 && homework.homework_detail_manual &&  homework.homework_detail_manual.comment_status != 1
      # 总共需要评价的任务数
      homework_eva_task_num = homework.homework_detail_manual.evaluation_num * homework.student_works.count
      unless homework_eva_task_num == 0 #总任务数不为0 的情况下
        #获取已经评价了多少的份作业  student_work_score里记录了评价情况，每条记录有提交作业的id
        #先求出提交作业的id集合
        work_ids = "(" + homework.student_works.map(&:id).join(",") + ")"
        #只要 student_work_score 中的 student_work_id在work_ids集合中，那么久说明这个任务被完成了

        sql = "select count(1) from student_works_scores where reviewer_role = #{role} and  student_work_id in #{work_ids} "
        homework_eva_completed_task_num = ActiveRecord::Base.connection().select_value(sql)
      end
    end
    if homework_eva_task_num == 0
      0
    else
     ( homework_eva_completed_task_num /  homework_eva_task_num.to_f * 100 ) .round(1)
    end

  end


end