pgfqe6ch8/app/models/game.rb

class Game < ActiveRecord::Base
  # stauts 0: can exe 1：doing 2：successed 3:locked
  # modify_time： 与challenges表的modify_time联合使用，2个字段一致，则表示测试集未修改，反之，被修改
  default_scope :order => 'games.created_at desc'
  attr_accessible :myshixun_id, :user_id, :status, :final_score, :challenge_id, :open_time, :identifier, :answer_open, :end_time,
                  :retry_status, :resubmit_identifier, :test_sets_view, :picture_name, :accuracy, :modify_time, :cost_time, :evaluate_count
  belongs_to :myshixun,:touch=> true
  belongs_to :user
  belongs_to :challenge
  has_many :outputs, :dependent => :destroy
  has_many :choose_output
  # has_many :test_sets, :dependent => :destroy
  has_many :challenge_samples
  has_many :game_codes, :dependent => :destroy
  has_many :evaluate_records, :dependent => :destroy
  has_one :run_code_message, :dependent => :destroy

  include ApplicationHelper
  scope :min, lambda { select([:id, :status, :myshixun_id, :user_id, :final_score, :challenge_id, :identifier,
                               :answer_open, :test_sets_view, :cost_time, :star, :modify_time]) }


  # 根据得分比例来算实际得分(试卷、实训作业)
  def real_score score
    self.final_score == challenge.score ? self.final_score : (self.final_score.to_f / challenge.score) * score
  end

  def had_done
    myshixun = self.myshixun
    challenge_count = myshixun.games.count
    had_done = (myshixun.games.where(:status => 2).count == challenge_count) ? 1 : 0
    return had_done
  end

  def had_passed?
    self.status == 2 ? true : false
  end

  def consumes_time
    if self.end_time.blank?
      "--"
    else
      game_spend_time(self.cost_time)
    end
  end

  def consumes_time_int
    if self.end_time.blank?
      0
    else
      self.end_time.to_i - self.open_time.to_i
    end
  end

  # id 转换成 challenge'position
  def to_param
    identifier
  end

  # 因为outputs是按qurey_index倒序，所有first取的qurey_index的最大值
  # 之所以加1是以为，存的时候要递增，如果仅取的话，则注意：必须减一
  def query_index
    if self.outputs.try(:first).present?
      self.outputs.first.try(:query_index).to_i + 1
    else
      1
    end
  end

  def lastest_code
    self.game_codes.first.try(:new_code)
    # game_code = GameCode.where(:game_id => self.id).first
    # game_code.try(:new_code)
  end

  def last_game
    challenge = self.challenge
    last_challenge_id = challenge.last_challenge
    game = Game.where(:myshixun_id => self.myshixun_id, :challenge_id => last_challenge_id).first
    #render_404 if game.nil?
    return game
  end

  # def next_game
  #   challenge = self.challenge
  #   next_challenge_id = challenge.next_challenge
  #   game = Game.where(:myshixun_id => self.myshixun_id, :challenge_id => next_challenge_id).first
  #   raise ActiveRecord::RecordNotFound if game.nil?
  #   return game
  # end

  def prev_game
    challenge = self.challenge
    prev_challenge_id = challenge.prev_challenge
    game = Game.where(:myshixun_id => self.myshixun_id, :challenge_id => prev_challenge_id).first
    raise ActiveRecord::RecordNotFound if game.nil?
    return game
  end

  # 针对api形式取下一关identifier
  def self.next_game shixun_id, myshixun_id, challenge_position
    next_game = Game.find_by_sql("select * from games where myshixun_id=#{myshixun_id} and challenge_id=(select id from challenges where
                    shixun_id=#{shixun_id} and position=#{challenge_position + 1})").first
  end

  # 针对api形式取上一关identifier
  def self.prev_identifier shixun_id, myshixun_id, challenge_position
    Game.find_by_sql("select identifier from games where myshixun_id=#{myshixun_id} and challenge_id=(select id from challenges where
                    shixun_id=#{shixun_id} and position=#{challenge_position - 1})").first.try(:identifier)
  end

  def up_game
    challenge = self.challenge
    if challenge.position == 1
      self
    else
      prev_challenge_id = Challenge.where(:position => (challenge.position - 1), :shixun_id => challenge.shixun).first
      game = Game.where(:myshixun_id => self.myshixun_id, :challenge_id => prev_challenge_id).first
    end
  end

  def down_game
    challenge = self.challenge
    challenge_count = Challenge.where(:shixun_id => challenge.shixun_id).count
    if challenge.position == challenge_count
      challenge.position = 0
    end
    next_challenge_id = Challenge.where(:position => (challenge.position + 1), :shixun_id => challenge.shixun).first
    game = Game.where(:myshixun_id => self.myshixun_id, :challenge_id => next_challenge_id).first
  end

  def all_outputs
      Output.select([:game_id, :query_index, :out_put, :created_at]).where(:game_id => self.id).group(:query_index)
  end

  # 获取game最新的一条输出结果
  def latest_output
    outputs = Output.where(:game_id => self.id).order("created_at desc")
    output = outputs.blank? ? nil : outputs.first
    return output
  end

  def is_final_game?
    challenge = self.challenge
    challenge.try(:position).to_i == challenge.shixun.challenges.count ? true : false
  end

  # 选择题正确答案个数
  def choose_correct_num
    Output.where(:game_id => self.id, :query_index => (self.query_index - 1), :result => 1).count
  end

end