educoder/app/controllers/exercise_questions_controller.rb

class ExerciseQuestionsController < ApplicationController
  before_action :require_login  #用户需登陆
  before_action :get_exercise,only:[:new,:create]  #获取试卷
  before_action :get_exercise_question,except: [:new,:create]  #获取试卷的问题及试卷
  before_action :is_course_teacher  #是否为老师
  before_action :validate_params,only: [:create,:update]  #传入参数的验证
  before_action :check_exercise_status,only: [:new,:create,:delete_answer,:destroy]  #除未发布状态之外，其余状态不能进行增删操作
  before_action :cannot_change_column,only: [:update]  #更新时不能更改的内容
  before_action :check_adjust_score,only: [:adjust_score]
  include ExercisesHelper

  def new
    ActiveRecord::Base.transaction do
      begin
        @exercise_question  = @exercise.exercise_questions.new
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("页面访问失败失败！")
        raise ActiveRecord::Rollback
      end
    end
  end

  #question_type 0为单选题，1为多选题，2为判断题，3为填空题（单空和多空），4为简答题，5为实训题
  def create
    ActiveRecord::Base.transaction do
      begin
        question_options = {
            :question_title => params[:question_title],
            :question_type => params[:question_type].present? ? params[:question_type].to_i : 0,  #默认为单选题
            :question_number => @exercise.exercise_questions.count + 1,
            :question_score => params[:question_score].present? ? params[:question_score].to_f.round(1) : 5.0,
            :shixun_id => params[:shixun_id].blank? ? "" : params[:shixun_id],
            :is_ordered => params[:is_ordered]  # 填空题的答案是否为一一对应关系,默认为true即为一一对应
        }
        @exercise_question  = @exercise.exercise_questions.new(question_options)
        #插入问题时，那么从插入的这个id以后的question_num都将要+1
        if params[:insert_id].present?
          insert_exercise = @exercise.exercise_questions.find_by(id: params[:insert_id])
          if insert_exercise.present?  #如果该问题存在的话，意思是如果是第一题，那么就不存在插入
            ques_num = insert_exercise.question_number.to_i
            @exercise_question.question_number = ques_num + 1  #更新了问题的位置
            @exercise.exercise_questions.insert_question_ex(ques_num).update_all("question_number = question_number + 1")
          end
        end

        if @exercise_question.save
          #为选择题(包括单选和多选)的时候,创建问题选项
          ques_type = @exercise_question.question_type
          if ques_type <= 1
            choices_array = params[:question_choices]
            choices_count= choices_array.count
            standard_answer = params[:standard_answers] #为数组格式，因为可能会有单选和多选，标准答案，已提前判断不能为空,
            standard_answer = standard_answer.uniq.reject(&:blank?)
            (1..choices_count).each do |c|
              choice = choices_array[c-1]  #每一个选项的内容
              choice_option = {
                  :choice_position => c,
                  :choice_text => choice.strip
              }
              question_choices = @exercise_question.exercise_choices.new(choice_option)
              question_choices.save
            end
            #标准答案的存储，如：["1","2","3"..]等，1对应A，2对应B，3对应C。。。
            standard_answer.each do |a|
              choice_id = a.to_i
              standard_option = {
                  :exercise_question_id => @exercise_question.id,
                  :exercise_choice_id => choice_id  #即为选择的位置参数
              }
              question_standard_answer = ExerciseStandardAnswer.new(standard_option)
              question_standard_answer.save
              if standard_answer.count > 1 && ques_type == 0  #当标准答案数大于1，且不为多选时，修改为多选
                @exercise_question.update_attribute("question_type",1)
              elsif standard_answer.count == 1 && ques_type == 1
                @exercise_question.update_attribute("question_type",0)
              end
            end
          elsif ques_type == 2  #这个为判断题
            choices_array = params[:question_choices]  #判断的选项，对/错等等
            choices_count= choices_array.count
            (1..choices_count).each do |c|
              choice = choices_array[c-1]  #每一个选项的内容
              choice_option = {
                  :choice_position => c,
                  :choice_text => choice.strip
              }
              question_choices = @exercise_question.exercise_choices.create(choice_option)
              question_choices.save
            end
            standard_answer = params[:standard_answers]  #对应选项的id
            standard_option = {
                :exercise_question_id => @exercise_question.id,
                :exercise_choice_id => standard_answer.first.to_i
            }
            question_standard_answer = ExerciseStandardAnswer.new(standard_option)
            question_standard_answer.save
          elsif ques_type == 3  #填空题，每空的参考答案有多个，那么以位置对应
            standard_answer = params[:standard_answers]
            standard_answer.each do |a|
              null_choice_id = a[:choice_id]
              null_choice_text = a[:answer_text]
              null_choice_text.each do |n|
                standard_option = {
                    :exercise_question_id => @exercise_question.id,
                    :exercise_choice_id => null_choice_id,
                    :answer_text => n
                }
                question_standard_answer = ExerciseStandardAnswer.new(standard_option)
                question_standard_answer.save
              end
            end
          elsif ques_type == 4  #简答题
            if params[:standard_answers].present? && params[:standard_answers].reject(&:blank?).count > 0
              standard_answer = params[:standard_answers]
              standard_answer.each do |a|
                standard_option = {
                    :exercise_question_id => @exercise_question.id,
                    :answer_text => a,
                }
                question_standard_answer = ExerciseStandardAnswer.new(standard_option)
                question_standard_answer.save
              end
            end
          elsif ques_type == 5  #实训题
            shixun = Shixun.find_by(id: params[:shixun_id])
            shixun_scores = params[:question_scores]  #试卷有多个的分值有多个分数表，所以为分数的数组
            shixun_name = params[:shixun_name] || shixun.name
            question_score = 0
            shixun.challenges.try(:each_with_index) do |challenge,index|
              shixun_option = {
                  :challenge_id => challenge.id,
                  :shixun_id => shixun.id,
                  :exercise_question_id => @exercise_question.id,
                  :position => (index + 1),
                  :question_score => shixun_scores[index].present? ? shixun_scores[index].to_f.round(1) : 5
              }
              ex_shixun_challenge = ExerciseShixunChallenge.create(shixun_option)
              question_score += ex_shixun_challenge.question_score   # 问题的分数，为各个关卡分数的总和
            end
            @exercise_question.update_attributes(:question_score => question_score,:shixun_name=> shixun_name)
          end
        end
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("试卷问题创建失败！")
        raise ActiveRecord::Rollback
      end
    end
  end

  def show
    ActiveRecord::Base.transaction do
      begin
        @exercise_choices = @exercise_question.exercise_choices
        @exercise_question_shixun = @exercise_question.exercise_shixun_challenges
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("页面调用失败！")
        raise ActiveRecord::Rollback
      end
    end
  end

  def edit
    ActiveRecord::Base.transaction do
      begin
        @exercise_choices = @exercise_question.exercise_choices
        @exercise_question_shixun = @exercise_question.exercise_shixun_challenges
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("页面调用失败！")
        raise ActiveRecord::Rollback
      end
    end
  end

  def update
    ActiveRecord::Base.transaction do
      begin
        # 更新试卷题目的内容
        question_options = {
            :question_title => params[:question_title],
            :is_ordered => params[:is_ordered],  # 填空题的答案是否为一一对应关系,默认为true即为一一对应
            :question_score => params[:question_score].present? ? params[:question_score].to_f.round(1) : 5.0  #不可修改分数
        }
        choices_array = params[:question_choices]
        stan_answer_params = params[:standard_answers]
        standard_answer = stan_answer_params.present? ? stan_answer_params.uniq.reject(&:blank?) : []
        @exercise_question.update_attributes(question_options)
        #当选项存在时，可修改选项内容，但是不能更改选项的位置（即不能增删选项）
        if choices_array.present?
          ex_choices = @exercise_question.exercise_choices
          ex_choice_count = ex_choices.count
          choice_array_count = choices_array.count
          ex_choice_count_array = (1..ex_choice_count).to_a
          choice_array_count_array = (1..choice_array_count).to_a
          if ex_choice_count > choice_array_count   #如果选项有减少的，那么只更新传入的，删除以前的
            choice_array_count_array.each do |c|
              choice = choices_array[c-1]  #每一个选项的内容
              exercise_choice = @exercise_question.exercise_choices.find_choice_custom("choice_position",(c))
              exercise_choice.update(choice_text:choice)
            end
            drop_ex_choice = @exercise_question.exercise_choices.left_choice_choose("choice_position",(choice_array_count))
            drop_ex_choice.destroy_all
          else
            ex_choice_count_array.each do |c|
              choice = choices_array[c-1]  #每一个选项的内容
              exercise_choice = @exercise_question.exercise_choices.find_choice_custom("choice_position",(c))
              exercise_choice.update(choice_text:choice)
            end
            new_add_choice = choice_array_count_array - ex_choice_count_array  #新传入的需新增
            if new_add_choice.count > 0
              new_add_choice.each do |i|
                choice_option = {
                    :choice_position => i,
                    :choice_text => choices_array[i-1].strip
                }
                question_choices = @exercise_question.exercise_choices.new(choice_option)
                question_choices.save
              end
            end
          end
        end
        #试卷未发布时，当标准答案存在时，可修改标准答案内容，可增删标准答案，否则只能修改标准答案，不能增删标准答案
        @exercise_answers_array = @exercise_question.exercise_standard_answers  #问卷的全部标准答案
        if standard_answer.present?
          if @exercise_question.question_type <= 2 #选择题/判断题，标准答案为一个或多个
            exercise_standard_choices = @exercise_answers_array.pluck(:exercise_choice_id) #问题以前的全部标准答案选项位置
            common_standard_choices = standard_answer & exercise_standard_choices # 传入的标准答案的选项位置和以前的并集，即表示不用做更改的
            old_left_standard_choices = exercise_standard_choices - common_standard_choices # 以前的差集共同的，剩余的表示需要删掉
            new_left_standard_choices = standard_answer - common_standard_choices # 传入的标准答案差集共同的，剩余的表示需要新建
            if old_left_standard_choices.count > 0
              @exercise_answers_array.standard_by_ids(old_left_standard_choices).destroy_all
            end
            if new_left_standard_choices.count > 0  #新建标准答案
              new_left_standard_choices.each do |s|
                standard_option = {
                    :exercise_question_id => @exercise_question.id,
                    :exercise_choice_id => s.to_i  #即为选择的位置参数
                }
                question_standard_answer = ExerciseStandardAnswer.new(standard_option)
                question_standard_answer.save
              end

            end
            if standard_answer.count > 1 && @exercise_question.question_type == 0  #当标准答案数大于1，且不为多选时，修改为多选
              @exercise_question.update_attribute("question_type",1)
            elsif standard_answer.count == 1 && @exercise_question.question_type == 1
              @exercise_question.update_attribute("question_type",0)
            end
          elsif @exercise_question.question_type == 3  #填空题
            old_ex_answer = @exercise_question.exercise_standard_answers  #当前问题的全部标准答案
            old_ex_answer_choice_ids = old_ex_answer.pluck(:exercise_choice_id).uniq   #全部的答案数组序号
            new_ex_answer_choice_ids = standard_answer.map {|a| a[:choice_id]}.uniq   #新传入的答案数组序号

            #删除多余的选项
            if old_ex_answer_choice_ids.count > new_ex_answer_choice_ids.count  #有减少的填空
              delete_ex_answer_choice_ids = old_ex_answer_choice_ids - new_ex_answer_choice_ids
              old_ex_answer.standard_by_ids(delete_ex_answer_choice_ids).destroy_all
            end
            standard_answer.each do |aa|
              null_choice_id = aa[:choice_id]
              null_choice_text = aa[:answer_text]
              null_choice_text_count = null_choice_text.count  #当前传入的答案数量
              null_choice_text_count_array = (1..null_choice_text_count).to_a

              ex_answer_pre = old_ex_answer.standard_by_ids(null_choice_id)  #当前问题的全部答案
              ex_answer_pre_count = ex_answer_pre.count
              ex_answer_pre_count_array = (1..ex_answer_pre_count).to_a

              if old_ex_answer_choice_ids.include?(null_choice_id)  #以前的填空题答案包含有现在的填空序号
                if null_choice_text_count >= ex_answer_pre_count
                  new_add_choice = null_choice_text_count_array - ex_answer_pre_count_array
                  ex_answer_pre_count_array.each do |n|
                    standard_option = {
                        :exercise_question_id => @exercise_question.id,
                        :exercise_choice_id => null_choice_id,
                        :answer_text => null_choice_text[n-1]
                    }
                    ex_answer_pre[n-1].update(standard_option)
                  end
                  if new_add_choice.count > 0  #表示有新增的
                    new_add_choice.each do |i|
                      standard_option = {
                          :exercise_question_id => @exercise_question.id,
                          :exercise_choice_id => null_choice_id,
                          :answer_text => null_choice_text[i-1]
                      }
                      question_standard_answer = ExerciseStandardAnswer.new(standard_option)
                      question_standard_answer.save
                    end
                  end
                else
                  new_delete_choice = ex_answer_pre_count_array - null_choice_text_count_array
                  null_choice_text.each_with_index do |n,index|
                    standard_option = {
                        :exercise_question_id => @exercise_question.id,
                        :exercise_choice_id => null_choice_id,
                        :answer_text => n
                    }
                    ex_answer_pre[index].update(standard_option)
                  end
                  if new_delete_choice.count > 0  #表示填空题的答案有删减的
                    new_delete_choice.each do |d|
                      ex_answer_pre[d-1].destroy
                    end
                  end
                end
              else
                null_choice_text.each do |n|
                  standard_option = {
                      :exercise_question_id => @exercise_question.id,
                      :exercise_choice_id => null_choice_id,
                      :answer_text => n
                  }
                  question_standard_answer = ExerciseStandardAnswer.new(standard_option)
                  question_standard_answer.save
                end
              end
            end
          end
        end
        if @exercise_question.question_type == 4  #主观题
          main_standard_answer = standard_answer.present? ? standard_answer.first : nil
          if @exercise_answers_array.present?
            @exercise_answers_array.first.update_attribute("answer_text",main_standard_answer)
          else
            standard_option = {
                :exercise_question_id => @exercise_question.id,
                :answer_text => main_standard_answer,
            }
            question_standard_answer = ExerciseStandardAnswer.new(standard_option)
            question_standard_answer.save
          end
        elsif @exercise_question.question_type == 5
          question_score = 0
          shixun_name = params[:shixun_name] || @exercise_question.shixun_name
          @exercise_question.exercise_shixun_challenges.each_with_index do |challenge, index|
            challenge.question_score = params[:question_scores][index].to_f.round(1)
            challenge.save
            question_score += challenge.question_score
          end
          @exercise_question.question_score = question_score
          @exercise_question.shixun_name = shixun_name
        end

        #当试卷已发布时（试卷的总状态),当标准答案修改时，如有已提交的学生，需重新计算分数.

        if @exercise.exercise_status == 2
          ex_users_committed = @exercise.exercise_users.exercise_user_committed
          if ex_users_committed.size > 0
            ex_users_committed.each do |ex_user|
              user = ex_user.user
              objective_score = calculate_student_score(@exercise,user)[:total_score]
              subjective_score = ex_user.subjective_score
              total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
              total_score = objective_score + total_score_subjective_score
              ex_user.update_attributes(objective_score:objective_score,score:total_score)
            end
          end
        end

        if @exercise_question.save
          normal_status(0,"试卷更新成功！")
        else
          normal_status(-1,"试卷更新失败！")
        end
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("页面调用失败！")
        raise ActiveRecord::Rollback
      end
    end
  end

  # 试卷问题的上下移动
  def up_down
    ActiveRecord::Base.transaction do
      begin
        opr = params[:opr]
        current_q_p = @exercise_question.question_number.to_i  #问题的当前位置
        if @exercise.exercise_status.to_i == 1
          if opr.present?
            if opr.to_s == "up"
              last_q_p = @exercise.exercise_questions.find_by(question_number: (current_q_p - 1))  # 当前问题的前一个问题
              if last_q_p.present?
                @exercise_question.update_attribute('question_number', (current_q_p - 1))
                last_q_p.update_attribute('question_number', current_q_p) # 重新获取当前问题的位置
                normal_status(0, "问题上移成功！")
              else
                normal_status(-1, "移动失败，已经是第一个问题了！")
              end
            elsif opr.to_s == "down"
              next_q_p = @exercise.exercise_questions.find_by(question_number: (current_q_p + 1))  # 当前问题的前一个问题
              if next_q_p.present?
                @exercise_question.update_attribute('question_number', (current_q_p + 1))
                next_q_p.update_attribute('question_number', current_q_p)
                normal_status(0, "问题下移成功！")
              else
                normal_status(-1, "移动失败，已经是最后一个问题了！")
              end
            end
          else
            normal_status(-1, "移动失败，请输入参数")
          end
        else
          normal_status(-1, "已发布的不能移动问题")
        end
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("问题移动失败！")
      end
    end
  end

  #试卷选项的删除
  def delete_answer
    ActiveRecord::Base.transaction do
      begin
        choice_d_id = params[:choice_no].to_i  # 选项的当前位置
        question_choices = @exercise_question.exercise_choices
        delete_answer = question_choices.find_by(choice_position: choice_d_id)
        left_choices = question_choices.where("choice_position > ? ",choice_d_id)
        left_choices.update_all("choice_position = choice_position - 1") if left_choices
        if delete_answer.destroy
          normal_status(0, "答案删除成功！")
        else
          normal_status(-1, "答案删除失败！")
        end
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("答案删除失败！")
      end
    end
  end

  #试卷问题的删除
  def destroy
    ActiveRecord::Base.transaction do
      begin
        question_d_id = @exercise_question.question_number.to_i  #问题的当前位置
        exercise_questions = @exercise.exercise_questions
        left_questions = exercise_questions.where("question_number > ?", question_d_id)
        left_questions.update_all("question_number = question_number - 1") if left_questions
        if @exercise_question.destroy
          normal_status(0, "问题删除成功！")
        else
          normal_status(-1, "问题删除失败！")
        end
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("问题删除失败！")
      end
    end
  end

  #老师调分窗口
  def adjust_score
    ActiveRecord::Base.transaction do
      begin
        ex_obj_score = @exercise_current_user.objective_score #全部客观题得分
        ex_subj_score = @exercise_current_user.subjective_score < 0.0 ? 0.0 : @exercise_current_user.subjective_score #全部主观题得分
        ex_answers = @exercise_question.exercise_answers.search_answer_users("user_id",@user_id)  #当前用户答案的得分
        if @exercise_question.question_type == 3  #当为填空题，更新问题的总分,
          ex_answer_old = ex_answers.score_reviewed.pluck(:score).sum  #每一关的得分总和
          each_right_score = (@c_score / ex_answers.count.to_f)   #调分后，平均每关的分数
          new_obj_score = ex_obj_score - ex_answer_old + @c_score
          total_scores = new_obj_score + ex_subj_score
          ex_scores = {
              :objective_score => new_obj_score,
              :score => total_scores
          }
          @exercise_current_user.update_attributes(ex_scores)
          ex_answers.update_all(:score => each_right_score)   #所有的正确选项需重新更新
        elsif @exercise_question.question_type == 4  #当为主观题时
          if ex_answers.present?
            ex_answers_old_score = ex_answers.first.score > 0.0 ? ex_answers.first.score : 0.0  #原分数小于0，取0
            new_sub_score = ex_subj_score - ex_answers_old_score + @c_score  #原全部主观题总分减去原该主观题得分再加调分后的分数，即为当前全部主观题得分
            ex_answers.first.update_attribute("score",@c_score)
          else   #如果学生未答，则创建新的答题记录
            answer_option = {
                :user_id => @user_id,
                :exercise_question_id => @exercise_question.id,
                :score => @c_score,
                :answer_text => ""
            }
            ExerciseAnswer.create(answer_option)
            new_sub_score = @c_score
          end
          total_scores = ex_obj_score + new_sub_score
          ex_scores = {
              :subjective_score => new_sub_score,
              :score => total_scores
          }
          @exercise_current_user.update_attributes(ex_scores)

        elsif @exercise_question.question_type == 5
          # ex_answers = @exercise_question.exercise_shixun_answers.search_shixun_answers("user_id",@user_id).search_shixun_answers("exercise_shixun_challenge_id",@shixun_a_id)
          ex_answers = @exercise_question.exercise_shixun_answers.where(user_id:@user_id,exercise_shixun_challenge_id:@shixun_a_id)

          if ex_answers.present?  #当为实训题时
            ex_shixun_old_score = ex_answers.first.score > 0.0 ? ex_answers.first.score : 0.0
            new_obj_score = ex_obj_score - ex_shixun_old_score + @c_score
            ex_answers.first.update_attribute("score",@c_score)
          else
            ex_shixun_option ={
                :exercise_question_id => @exercise_question.id,
                :user_id => @user_id,
                :exercise_shixun_challenge_id => @shixun_a_id,
                :score => @c_score,
                :status => 0
            }
            ExerciseShixunAnswer.create(ex_shixun_option)
            new_obj_score = @c_score
          end
          total_scores = new_obj_score + ex_subj_score
          ex_scores = {
              :objective_score => new_obj_score,
              :score => total_scores
          }
          @exercise_current_user.update_attributes(ex_scores)
        end
        comments = params[:comment]
        question_comment = @exercise_question.exercise_answer_comments.first
        if question_comment.present?
          comment_option = {
              :comment => comments.present? ? comments : question_comment.comment,
              :score => @c_score,
              :exercise_answer_id => ex_answers.present? ? ex_answers.first.id : nil
          }
          question_comment.update_attributes(comment_option)
          @exercise_comments = question_comment
        else
          comment_option = {
              :user_id => current_user.id,
              :comment => comments,
              :score => @c_score,
              :exercise_question_id => @exercise_question.id,
              :exercise_shixun_answer_id => @shixun_a_id.present? ? @shixun_a_id : nil,
              :exercise_answer_id => ex_answers.present? ? ex_answers.first.id : nil
          }
          @exercise_comments = ExerciseAnswerComment.new(comment_option)
          @exercise_comments.save
        end
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("没有权限")
        raise ActiveRecord::Rollback
      end
    end
  end

  private

  def questions_params
    params.require(:exercise_question).permit(:question_title,:question_type,
                                              :question_number,:exercise_id,
                                              :question_score,:shixun_id,:is_ordered)
  end

  def get_exercise
    @exercise = Exercise.find_by(id:params[:exercise_id])
    if @exercise.blank?
      tip_exception(404,"试卷不存在")
    else
      @course = @exercise.course
      if @course.blank?
        tip_exception(404,"课堂不存在")
      end
    end
  end

  def is_course_teacher
    @identity = current_user.course_identity(@course)
    unless @identity < Course::STUDENT #为老师/助教/管理员
      tip_exception("403", "无权限操作")
    end
  end

  def get_exercise_question
    @exercise_question = ExerciseQuestion.find_by(id: params[:id])
    if @exercise_question.present?
      @exercise = @exercise_question.exercise
      if @exercise.blank?
        tip_exception(404,"试卷不存在")
      else
        @course = @exercise.course
        if @course.blank?
          tip_exception(404,"课堂不存在")
        end
      end
    else
      tip_exception(404,"试卷问题不存在")
    end
  end

  def validate_params
    normal_status(-1,"题目不允许为空！") if (params[:question_title].blank? && params[:question_type].to_i !=5 ) #除了实训题，其余题目必需有题干
    normal_status(-1,"问题类型不允许为空！" ) if params[:question_type].blank?
    normal_status(-1,"分值不允许为空！" ) if params[:question_score].blank? && params[:question_scores].blank?  #分值的数组或参数必需存在一个
    if params[:question_score].present? && params[:question_score].to_f <= 0.0  #问题类型存在，则分值不能为空,且必需大于0
        normal_status(-1,"分值必需大于0！")
    elsif (params[:question_score].present? && params[:question_score].to_f.round(1) > 100.0) || (params[:question_scores].present? && (params[:question_scores].map{|a| a.to_f.round(1)}.max > 100.0))
      normal_status(-1,"分值不能超过100分！")
    elsif params[:question_scores].present? && params[:question_scores].include?(0.0) #如果有负数，则自动取绝对值，#多个分数值，针对实训题的
      normal_status(-1,"分值必需大于0！")
    elsif params[:standard_answers].present? && params[:question_choices].present? && (params[:standard_answers].count > params[:question_choices].count)
      normal_status(-1,"标准答案数不能大于选项数！")
    elsif [0,1,2,3].include?(params[:question_type].to_i) && (params[:standard_answers].blank? || params[:standard_answers].include?("")) #选择题/判断题/填空题 问题选项/标准答案不能为空,也不能包含空的内容
      normal_status(-1,"标准答案不能为空！")
    elsif params[:question_type].to_i == 2 && (params[:standard_answers].count > 1 || params[:question_choices].blank? || params[:question_choices].include?("")) #判断题的标准答案不能大于1个，选项不能为空
      normal_status(-1,"判断题选项不能为空/标准答案不能大于1个！")
    elsif params[:question_type].to_i <= 1 && (params[:question_choices].blank? || params[:question_choices].include?("") || params[:question_choices].count < 2) #选择题选项不能为空,且不能小于2
      normal_status(-1,"选择题选项内容不能为空，且不能少于2个！")
    elsif params[:question_type].to_i == 3 && (params[:standard_answers].blank? || params[:standard_answers].count > 5 ) #填空题选项最多为5个,且如果为1个的话，不允许修改is_ordered
      normal_status(-1,"填空题标准答案不能为空/不能超过5个！")
    elsif params[:question_type].to_i == 4 && params[:standard_answers].count > 2 #简单题参考答案最多为1个
      normal_status(-1,"简答题的参考答案不能大于2个！")
    elsif params[:question_type].to_i == 5
      if params[:shixun_id].blank?  #实训题的id不能为空
        normal_status(-1,"实训题id不能为空！")
      elsif params[:shixun_name].blank?
        normal_status(-1,"实训题名称不能为空！")
      end
    end
  end

  def check_exercise_status
    normal_status(-1,"不能更改试卷问题！") if @exercise.exercise_status != 1
  end

  #更新时不能修改的内容
  def cannot_change_column
    #已发布的/已截止的/评阅中的状态时,不能修改分数，不能增删问题和答案,不能修改标准答案，可以修改选项内容/题目内容，这里仅指单个问题
    if @exercise.exercise_status != 1
      question_score = @exercise_question.question_score  #原来的分数
      update_question_score = params[:question_score].to_f.round(1)   #传入的分数
      choices_count = @exercise_question.exercise_choices.size  #原来的选项个数
      exercise_choice_ids = @exercise_question.exercise_standard_answers.pluck(:exercise_choice_id).uniq
      standard_answers_text = @exercise_question.exercise_standard_answers.pluck(:answer_text).uniq
      update_choices_count = params[:question_choices].present? ? params[:question_choices].count : choices_count #传入的选项个数
      standard_answer = params[:standard_answers]   #传参数是怎么传的？能不能传空值？
      if update_question_score.present? && question_score != update_question_score #分数有更改
        normal_status(-1,"已发布/已截止，分数不允许修改！")
      elsif update_choices_count != choices_count #选项个数有修改
        normal_status(-1,"已发布/已截止，不允许增删答案！")
      elsif standard_answer.present?
        if @exercise_question.question_type == 3
          exercise_answers_text = standard_answer.map{|a| a[:answer_text]}.sum.uniq
          unless (standard_answer.count == exercise_choice_ids.count) && (standard_answers_text.count == exercise_answers_text.count)
            normal_status(-1,"已发布/已截止，不允许增删标准答案！")
          end
        elsif @exercise_question.question_type == 4
          unless standard_answers_text.count == standard_answer.count
            normal_status(-1,"已发布/已截止，不允许增删标准答案！")
          end
        end
      end
    end
  end

  def check_adjust_score
    @c_score = params[:score].to_f   #调分后的分数
    @user_id = params[:user_id]
    @exercise_current_user = @exercise.exercise_users.exercise_commit_users(@user_id).first #当前试卷用户的答案内容
    if @exercise_current_user.blank?
      normal_status(-1,"用户不存在！")
    elsif @c_score.blank?
      normal_status(-1,"分数不能为空!")
    elsif @exercise_question.question_type <= 1 || @exercise_question.question_type == 2
      normal_status(-1,"选择题/判断题不能调分!")
    elsif params[:comment].present? && params[:comment].length > 100
      normal_status(-1,"评语不能超过100个字符!")
    else
      @shixun_a_id = params[:shixun_challenge_id]
      if @exercise_question.question_type == 5 #当为实训题时,为关卡的分数
        @shixun_challenge = @exercise_question.exercise_shixun_challenges.cha_id_find(@shixun_a_id)
        if @shixun_challenge.present?
          @old_ques_score = @shixun_challenge.first.question_score
        else
          @old_ques_score = nil
          normal_status(-1,"实训答案id不能为空!")
        end
      else
        @old_ques_score = @exercise_question.question_score #当不为实训题时，为各问题的分数
      end
      if @old_ques_score.present? && (@c_score > @old_ques_score)
        normal_status(-1,"分数不能大于题目分数!")
      end
    end
  end

end