socialforge/app/controllers/homework_attach_controller.rb

class HomeworkAttachController < ApplicationController
  layout "course_base"
  include CoursesHelper

  helper :words
  ###############################
  before_filter :can_show_course,except: []
  #判断当前角色权限时需先找到当前操作的project
  before_filter :find_course_by_bid_id, :only => [:new]
  before_filter :find_bid_and_course,:only => [:get_not_batch_homework,:get_batch_homeworks,:get_homeworks,:get_homework_jours, :get_student_batch_homework, :get_my_homework]
  before_filter :find_course_by_hoemwork_id, :only => [:edit,:update,:destroy,:show,:add_homework_users,:destory_homework_users, :praise_homework]
  #判断当前角色是否有操作权限
  #勿删 before_filter :authorize, :only => [:new,:edit,:update,:destroy]

  #获取未批作业列表
  def get_not_batch_homework
    sort, direction = params[:sort], params[:direction]
    order_by = sort == 'socre'? "s_score #{direction}" : "created_at #{direction}"
    teachers = find_course_teachers @course
    all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT * FROM (SELECT homework_attaches.*,
        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id IN #{teachers}) AS t_score,
        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id NOT IN #{teachers}) AS s_score
        FROM homework_attaches WHERE bid_id = #{@bid.id}
        ORDER BY #{order_by}) AS table1
        WHERE table1.t_score IS NULL")

    @homework_list = paginateHelper all_homework_list,10
    @direction = direction == 'asc'? 'desc' : 'asc'
    respond_to do |format|
      format.js
    end
  end

  #获取已评作业列表
  def get_batch_homeworks
    sort, direction = params[:sort], params[:direction]
    teacher_proportion = get_teacher_proportion @bid
    order_by = sort == 'socre'? "(CASE WHEN t_score IS NULL THEN 0 ELSE t_score * #{teacher_proportion} END + CASE WHEN s_score IS NULL THEN 0 ELSE s_score * #{1 - teacher_proportion} END) #{direction}" : "created_at #{direction}"
    teachers = find_course_teachers @course
    all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT * FROM (SELECT homework_attaches.*,
            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id IN #{teachers} and stars IS NOT NULL) AS t_score,
            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id NOT IN #{teachers}) AS s_score
            FROM homework_attaches WHERE bid_id = #{@bid.id}
            ORDER BY #{order_by}) AS table1
            WHERE table1.t_score IS NOT NULL")
    @homework_list = paginateHelper all_homework_list,10
    @direction = direction == 'asc'? 'desc' : 'asc'
    respond_to do |format|
      format.js
    end
  end

  #获取所有作业列表
  def get_homeworks
    sort, direction = params[:sort], params[:direction]
    teacher_proportion = get_teacher_proportion @bid
    order_by = sort == 'socre'? "(CASE WHEN t_score IS NULL THEN 0 ELSE t_score * #{teacher_proportion} END + CASE WHEN s_score IS NULL THEN 0 ELSE s_score * #{1 - teacher_proportion} END) #{direction}" : "created_at #{direction}"
    teachers = find_course_teachers @course
    all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT homework_attaches.*,
            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id in #{teachers}) AS t_score,
            (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id not in #{teachers}) AS s_score
            FROM homework_attaches WHERE bid_id = #{@bid.id}
            ORDER BY #{order_by}")
    @homework_list = paginateHelper all_homework_list,10
    @direction = direction == 'asc'? 'desc' : 'asc'
    respond_to do |format|
      format.js
    end
  end

  #获取学生匿评列表
  def get_student_batch_homework
    @is_student_batch_homework = true
    teachers = find_course_teachers @course
    all_homework_list = HomeworkAttach.eager_load(:attachments,:user,:rate_averages).find_by_sql("SELECT * FROM(SELECT homework_attaches.*,
          (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id IN #{teachers}) AS t_score,
          (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id NOT IN #{teachers}) AS s_score,
          (SELECT stars FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id = 3123) AS m_score
          FROM homework_attaches
          INNER JOIN homework_evaluations ON homework_evaluations.homework_attach_id = homework_attaches.id
          WHERE homework_attaches.bid_id = #{@bid.id} AND homework_evaluations.user_id = #{User.current.id}) AS table1
          WHERE table1.m_score IS NULL")
    @homework_list = paginateHelper all_homework_list,10
    respond_to do |format|
      format.js
    end
  end

  #获取我的作业
  def get_my_homework
    @is_my_homework = true
    teachers = find_course_teachers @course
    all_homework_list = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id IN #{teachers}) AS t_score,
        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id NOT IN #{teachers}) AS s_score
        FROM homework_attaches
        WHERE homework_attaches.bid_id = #{@bid.id} AND homework_attaches.user_id = #{User.current.id}")
    #如果我没有创建过作业，就检索我是否参与了某个作业
    if all_homework_list.empty?
      all_homework_list = HomeworkAttach.find_by_sql("SELECT homework_attaches.*,
        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id IN #{teachers}) AS t_score,
        (SELECT AVG(stars) FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id = homework_attaches.id AND rater_id NOT IN #{teachers}) AS s_score
        FROM homework_attaches
        INNER JOIN homework_users ON homework_users.homework_attach_id = homework_attaches.id
        WHERE homework_attaches.bid_id = #{@bid.id} AND homework_users.user_id = #{User.current.id}")
    end
    @homework_list = paginateHelper all_homework_list,10
    respond_to do |format|
      format.js
    end
  end

  #获取作业的留言列表
  def get_homework_jours
    #@user = @bid.author
    @jours = @bid.journals_for_messages.where('m_parent_id IS NULL').order('created_on DESC')
    @jour = paginateHelper @jours,10
    @state = false
    respond_to do |format|
      format.js
    end
  end

  #为作业点赞
  def praise_homework
    pt = PraiseTread.new
    pt.user_id = User.current.id
    pt.praise_tread_object_id = @homework.id
    pt.praise_tread_object_type = "HomeworkAttach"
    pt.praise_or_tread = 1
    if pt.save
      respond_to do |format|
        format.js
      end
    else
      render_404
    end
  end

  #获取作业的成员
  def get_homework_member homework
    @hoemwork_users = users_for_homework(@homework)
    @members = members_for_homework(@homework,@hoemwork_users,params[:q])
    @members = paginateHelper @members,10
  end

  def index
    @homeworks = HomeworkAttach.all
    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @homeworks }
    end
  end

  #作业添加成员（参与人员）
  def add_homework_users
    if User.current.admin? ||  User.current.member_of_course?(@homework.bid.courses.first)
      #@homework = HomeworkAttach.find(params[:id])
      if params[:membership]
        if params[:membership][:user_ids]
          attrs = params[:membership].dup
          user_ids = attrs.delete(:user_ids)
          user_ids.each do |user_id|
            @homework.homework_users.build(:user_id => user_id)
          end
        end
      end
      @homework.save
      get_homework_member @homework
      respond_to do |format|
        format.js
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  #作业删除成员（参与人员）
  def destory_homework_users
    #@homework = HomeworkAttach.find(params[:id])
    if User.current.admin? ||  User.current.member_of_course?(@homework.bid.courses.first)
      homework_user = @homework.homework_users.where("user_id = #{params[:user_id]}").first
      homework_user.destroy
      get_homework_member @homework
      respond_to do |format|
        format.js
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  def create
    bid = Bid.find params[:bid_id]
    if User.current.admin? || User.current.member_of_course?(bid.courses.first)   # modify by nwb
      if bid.homeworks.where("user_id = ?",User.current).count == 0
        user_id = params[:user_id]
        bid_id = params[:bid_id]
        if params[:homework_attach]
          if params[:homework_attach][:project_id]
            project_id = params[:homework_attach][:project_id]
          else
            project_id = 0
          end
        else
          project_id = 0
        end
        sta = 0
        name = params[:new_form][:name]
        description = params[:new_form][:description]
        options = {
            :user_id => user_id,
            :state => sta,
            :name => name,
            :description => description,
            :bid_id => bid_id,
            :project_id => project_id
        }

        @homework = HomeworkAttach.new(options)
        @homework.save_attachments(params[:attachments])
        render_attachment_warning_if_needed(@homework)

        if @homework.save
          respond_to do |format|
            format.html { redirect_to course_for_bid_url @homework.bid }
            format.json { head :no_content }
          end
        else
          render_403 :message => :notice_not_authorized
        end
      else
        render_403 :message => :notice_has_homework
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  def new
    @bid = Bid.find(params[:id])
    if User.current.admin? || User.current.member_of_course?(@bid.courses.first)
      @homework = HomeworkAttach.new
      respond_to do |format|
        format.html # new.html.erb
        format.json { render json: @homework }
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  #获取作业成员的集合
  def get_homework_member_list
    @homework = HomeworkAttach.find(params[:bid_id])
    course = @homework.bid.courses.first
    if User.current.admin? || User.current.member_of_course?(course)
      get_homework_member @homework
    else
      raise "error"
    end
    respond_to do |format|
      format.js
    end
  end

  #获取指定作业的所有成员
  def users_for_homework homework
    homework.nil? ? [] : (homework.users + [homework.user])
  end

  #获取可选成员列表
  #homework：作业
  #users：该作业所有成员
  #q:模糊匹配的用户的昵称
  def members_for_homework homework,users,q
    unpartin_users = homework.bid.courses.first.members.where("user_id not in (:users)", {:users => users}).joins(:user).where("users.login like '%#{q}%'")
    canpartin_users = []
    unpartin_users.each do |m|
        if m.user.allowed_to?(:paret_in_homework,homework.bid.courses.first)
          canpartin_users << m
        end
    end
    canpartin_users
  end

  def edit
    if User.current.admin? || User.current.member_of_course?(@homework.bid.courses.first)
      get_homework_member @homework
    else
      render_403 :message => :notice_not_authorized
    end
  end

  def update
    #@homework = HomeworkAttach.find(params[:id])
    course = @homework.bid.courses.first
    if User.current.admin? || User.current.member_of_course?(course)
      name = params[:homework_name]
      description = params[:homework_description]
      if params[:homework_attach]
        if params[:homework_attach][:project_id]
          project_id = params[:homework_attach][:project_id]
        else
          project_id = 0
        end
      else
        project_id = 0
      end
      @homework.name = name
      @homework.description = description
      @homework.project_id = project_id
      if params[:attachments]
        @homework.save_attachments(params[:attachments])
      end
      if @homework.save
        respond_to do |format|
          format.html { redirect_to course_for_bid_url @homework.bid }
          format.json { head :no_content }
        end
      else
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  def destroy
    if User.current.admin? || User.current == @homework.user
      if @homework.destroy
        #respond_to do |format|
        #  format.html { redirect_to course_for_bid_url @homework.bid }
        #  format.json { head :no_content }
        #end
        @homework_list = []
        @is_my_homework = true
        respond_to do |format|
          format.js
        end
      else
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  #显示作业信息
  def show
    if User.current.admin? || User.current.member_of_course?(@homework.bid.courses.first)
      # 打分统计
      stars_reates = @homework. rates(:quality)
      stars_reates_count = stars_reates.count == 0 ? 1 : stars_reates.count
      stars_status = stars_reates.select("stars, count(*) as scount").group("stars")
      @stars_status_map = Hash.new(0.0)
      stars_status.each do |star_status|
        percent = (star_status.scount * 1.0/ stars_reates_count) * 100.to_f
        percent_m = format("%.2f", percent)
        @stars_status_map["star#{star_status.stars.to_i}".to_sym] =
            percent_m.to_s + "%"
      end
      #是否已经进行过评价
      @has_evaluation = stars_reates.where("rater_id = ?",User.current).count > 0
      #是否开启互评功能
      @is_evaluation = @homework.bid.is_evaluation == 1 || @homework.bid.is_evaluation == nil
      @limit =  10
      @jours = @homework.journals_for_messages.where("is_comprehensive_evaluation is null").order("created_on DESC")
      @feedback_count = @jours.count
      @feedback_pages = Paginator.new @feedback_count, @limit, params['page']
      @offset ||= @feedback_pages.offset
      @jour = @jours[@offset, @limit]
      @comprehensive_evaluation = @homework.journals_for_messages.where("is_comprehensive_evaluation is not null").order("created_on DESC")

      @totle_score = score_for_homework @homework
      @teaher_score = teacher_score_for_homework @homework

      respond_to do |format|
        format.html
        format.js
      end
    else
      render_403 :message => :notice_not_authorized
    end
  end

  #删除留言
  def destroy_jour
    @journal_destroyed = JournalsForMessage.delete_message(params[:object_id])
    respond_to do |format|
      format.js
    end
  end

  #添加留言
  def addjours
    @homework = HomeworkAttach.find(params[:jour_id])
    @add_jour = @homework.addjours User.current.id, params[:new_form][:user_message],0,params[:is_comprehensive_evaluation]
    @jours = @homework.journals_for_messages.where("is_comprehensive_evaluation is null").order("created_on DESC")
    @limit =  10
    @feedback_count = @jours.count
    @feedback_pages = Paginator.new @feedback_count, @limit, params['page']
    @offset ||= @feedback_pages.offset
    @jour = @jours[@offset, @limit]
    @comprehensive_evaluation = @homework.journals_for_messages.where("is_comprehensive_evaluation is not null").order("created_on DESC")

    @totle_score = score_for_homework @homework
    @teaher_score = teacher_score_for_homework @homework
    respond_to do |format|
      format.js
    end
  end

  #教师综评
  def comprehensive_evaluation_jour
    @homework = HomeworkAttach.find(params[:jour_id])
    @add_jour = @homework.addjours User.current.id, params[:new_form][:user_message],0,params[:is_comprehensive_evaluation]
    respond_to do |format|
      format.html { redirect_to homework_attach_url @homework }
      format.json { head :no_content }
    end
  end

  #获取指定作业的平均得分
  def score
  end

  #添加回复
  def add_jour_reply
    parent_id = params[:reference_id]
    author_id = User.current.id
    reply_user_id = params[:reference_user_id]
    reply_id = params[:reference_message_id] # 暂时不实现
    content = params[:user_notes]
    options = {:user_id => author_id,
               :m_parent_id => parent_id,
               :m_reply_id => reply_id,
               :reply_id => reply_user_id,
               :notes => content,
               :is_readed => false}
    @jfm = JournalsForMessage.new(options)
    @jfm.save
    respond_to do |format|
      format.js{
        @save_succ = true if @jfm.errors.empty?
      }
    end
  end

  private
  #验证是否显示课程
  def can_show_course
    @first_page = FirstPage.find_by_page_type('project')
    if @first_page.show_course == 2
      render_404
    end
  end

  def find_bid_and_course
    @bid = Bid.find(params[:bid_id])
    @course = @bid.courses.first
  rescue ActiveRecord::RecordNotFound
    render_404
  end

  def find_course_by_bid_id
    @bid = Bid.find(params[:id])
    @course = @bid.courses.first
  rescue ActiveRecord::RecordNotFound
    render_404
  end

  def find_course_by_hoemwork_id
    @homework = HomeworkAttach.find(params[:id])
    @bid = @homework.bid
    @course = @bid.courses.first
  rescue ActiveRecord::RecordNotFound
    render_404
  end

  #获取课程的老师列表
  def find_course_teachers course
    teachers = "("
    teacher_members = searchTeacherAndAssistant(course)
    teacher_members.each do |member|
      if member == teacher_members.last
        teachers += member.user_id.to_s + ")"
      else
        teachers += member.user_id.to_s + ","
      end
    end
    teachers
  end

  #获取作业教师评分所占比例
  def get_teacher_proportion bid
    if bid.proportion
      teacher_proportion = bid.proportion * 1.0 / 100
    else
      teacher_proportion = 1.0
    end
    teacher_proportion
  end
end