educoder/app/controllers/exercise_banks_controller.rb

#encoding: UTF-8
class ExerciseBanksController < ApplicationController
  before_action :require_login
  before_action :find_bank, except: [:choose_shixun]
  before_action :bank_admin, only: [:update]
  before_action :commit_shixun_present, only: [:commit_shixun]

  def show
    @exercise_questions = @bank.exercise_bank_questions&.includes(:exercise_bank_choices, :exercise_bank_shixun_challenges,
                                                                  :exercise_bank_standard_answers).order("question_number ASC")

    if @bank.container_type == "Exercise"
      get_exercise_question_count
    else
      get_poll_question_count
    end
  end

  def update
    tip_exception("试卷标题不能为空！") if params[:exercise_name].blank?
    @bank.update_attributes!(name: params[:exercise_name], description: params[:exercise_description])
    normal_status(0,"试卷更新成功！")
  end

  def choose_shixun
    search = params[:search]
    if !current_user.admin?  #当不为管理员的时候
      user_school_id = current_user.school_id  #当前用户的学校id
      if user_school_id.present?
        none_shixun_ids = ShixunSchool.where("school_id != #{user_school_id}").pluck(:shixun_id)
        @publish_shixuns = Shixun.where.not(id: none_shixun_ids).unhidden
      end
    else
      @publish_shixuns = Shixun.unhidden
    end
    if search.present?
      @publish_shixuns = @publish_shixuns.search_by_name(search)
    end

    @shixuns = @publish_shixuns.joins(:challenges).where("challenges.st != 0").distinct
    # 全部页面，需返回
    @shixuns_count = @shixuns.count

    # 分页
    @page  = params[:page]  || 1
    @limit = params[:limit] || 8

    @shixuns = @shixuns.page(@page).per(@limit)
  end

  #确认实训的选择
  def commit_shixun
    @shixun_challenges = @shixun.challenges
    @shixun_challenges_count = @shixun_challenges.size
  end

  private

  def find_bank
    @bank = ExerciseBank.find_by!(id: params[:id])
    tip_exception(403, "无权限") unless (current_user.certification_teacher? && (@bank.is_public || @bank.user_id == current_user.id)) || current_user.admin?
  end

  def bank_admin
    tip_exception(403, "无权限") unless (current_user.certification_teacher? && @bank.user_id == current_user.id) || current_user.admin?
  end

  #判断实训是否已选择
  def commit_shixun_present
    question_shixun_ids = @exercise.exercise_bank_questions.pluck(:shixun_id).reject(&:blank?)
    shixun_id = params[:shixun_id]
    @shixun = Shixun.find_by(id: shixun_id)
    if shixun_id.present? && question_shixun_ids.include?(shixun_id)
      normal_status(-1,"该实训已选择！")
    elsif @shixun.blank?
      normal_status(-1,"该实训不存在！")
    end
  end

  def get_exercise_question_count
    @exercise_ques_count = @exercise_questions.size # 全部的题目数
    @exercise_ques_scores = @exercise_questions.pluck(:question_score).sum

    #单选题的数量及分数
    exercise_single_ques = @exercise_questions.find_by_custom("question_type", Exercise::SINGLE)
    @exercise_single_ques_count = exercise_single_ques.size
    @exercise_single_ques_scores = exercise_single_ques.pluck(:question_score).sum

    #多选题的数量及分数
    exercise_double_ques = @exercise_questions.find_by_custom("question_type", Exercise::MULTIPLE)
    @exercise_double_ques_count = exercise_double_ques.size
    @exercise_double_ques_scores = exercise_double_ques.pluck(:question_score).sum

    # 判断题数量及分数
    exercise_ques_judge = @exercise_questions.find_by_custom("question_type", Exercise::JUDGMENT)
    @exercise_ques_judge_count = exercise_ques_judge.size
    @exercise_ques_judge_scores = exercise_ques_judge.pluck(:question_score).sum

    #填空题数量及分数
    exercise_ques_null = @exercise_questions.find_by_custom("question_type", Exercise::COMPLETION)
    @exercise_ques_null_count = exercise_ques_null.size
    @exercise_ques_null_scores = exercise_ques_null.pluck(:question_score).sum

    #简答题数量及分数
    exercise_ques_main = @exercise_questions.find_by_custom("question_type", Exercise::SUBJECTIVE)
    @exercise_ques_main_count = exercise_ques_main.size
    @exercise_ques_main_scores = exercise_ques_main.pluck(:question_score).sum

    #实训题数量及分数
    exercise_ques_shixun = @exercise_questions.find_by_custom("question_type", Exercise::PRACTICAL)
    @exercise_ques_shixun_count = exercise_ques_shixun.size
    @exercise_ques_shixun_scores = exercise_ques_shixun.pluck(:question_score).sum
  end

  def get_poll_question_count
    @poll_questions_count = @exercise_questions&.size # 全部的题目数
    @poll_question_singles = @exercise_questions.find_by_custom("question_type", 1).size # 单选题
    @poll_question_doubles = @exercise_questions.find_by_custom("question_type", 2).size # 多选题
    @poll_question_mains = @exercise_questions.find_by_custom("question_type", 3).size #主观题
  end

end