socialforge/app/models/journals_for_message.rb

# fq
# 数据库字段中带有m前缀和is_readed是二次开发添加，之前的字段基本复用
# 注意reply_id 是提到人的id，不是留言id, Base中叫做 at_user
class JournalsForMessage < ActiveRecord::Base
  include Redmine::SafeAttributes
  include UserScoreHelper
  safe_attributes   "jour_type", # 留言所属类型
                      "jour_id", # 留言所属类型的id
                        "notes", # 留言内容
                     "reply_id", # 留言被回复留言者的用户id(用户a回复了用户b，这是b的id，用以查询谁给b留言了)
                       "status", # 留言是否被查看(弃用)
                      "user_id", # 留言者的id
                  "m_parent_id", # 留言信息的父留言id
                    "is_readed", # 留言是否已读
                "m_reply_count", # 留言的回复数量
                  "m_reply_id"   # 回复某留言的留言id(a留言回复了b留言，这是b留言的id)
               "is_comprehensive_evaluation"  # 1 教师评论、2 匿评、3 留言
  acts_as_tree :foreign_key => 'm_parent_id', :counter_cache => :m_reply_count, :order => "#{JournalsForMessage.table_name}.created_on ASC"

  belongs_to :project,
             :foreign_key => 'jour_id',
             :conditions => "#{self.table_name}.jour_type = 'Project' "
  belongs_to :course,
             :foreign_key => 'jour_id',
             :conditions => "#{self.table_name}.jour_type = 'Course' "

  belongs_to :jour, :polymorphic => true
  belongs_to :user
  belongs_to :homework_attach
  belongs_to :at_user, :class_name => "User", :foreign_key => 'reply_id'

  acts_as_event :title => Proc.new {|o| "#{l(:label_my_message)}"},
                :datetime => Proc.new {|o| o.updated_on },
                :author => Proc.new {|o| o.user },
                :description => Proc.new{|o| o.notes },
                :type => Proc.new {|o| o.jour_type },
                :url => Proc.new {|o|
                  if o.jour.kind_of? Project
                    {:controller => 'projects', :action => 'feedback', :id => o.jour, :r => o.id, :anchor => "word_li_#{o.id}"}
                  elsif  o.jour.kind_of? Course
                    {:controller => 'courses', :action => 'feedback', :id => o.jour, :r => o.id, :anchor => "word_li_#{o.id}"}
                  end
                }
    acts_as_activity_provider :author_key => :user_id,
                            :timestamp => "#{self.table_name}.updated_on",
                            :find_options => {:include => :project }

  acts_as_activity_provider :type => 'course_journals_for_messages',
                            :author_key => :user_id,
                            :timestamp => "#{self.table_name}.updated_on",
                            :find_options => {:include => :course }


  has_many :acts, :class_name => 'Activity', :as => :act, :dependent => :destroy

  validates :notes, presence: true
  after_create :act_as_activity ,:expire_cache#huang
  after_update :expire_cache
  before_destroy :expire_cache
  after_create :reset_counters!
  after_destroy :reset_counters!
  after_save :be_user_score
  after_destroy :down_user_score

  # default_scope { where('m_parent_id IS NULL') }

  def self.create_by_user? user
    if user.anonymous?
      return false 
    else
      return true
    end
  end

  
  def self.remove_by_user? user
    if(  self.user == user || 
       ( self.jour.kind_of?(User) && self.jour== user )
      )
      true
    else
      false
    end
  end
  
  def self.delete_message(message_id)
    self.find(message_id).destroy
    # self.destroy_all "id = #{message_id}"
  end
  
  def reference_user
    User.find(reply_id)
  end

  def delete_by_user?user
    # 用户可删除自己的留言
    if self.user.id == user.id || user.admin?
      return true
    else
      return false
    end
  end
  
  def self.reference_message(user_id)
    @user = User.find(user_id)
    message = JournalsForMessage.find_by_sql("select * from journals_for_messages where reply_id = #{@user.id}
      or (jour_type = 'Bid' and jour_id in (select id from bids where author_id = #{@user.id}))")
    message 
  end
  
  def act_as_activity
    if self.jour_type == 'Principal' 
      unless self.user_id == self.jour.id &&  self.user_id != self.reply_id && self.reply_id != 0        
        # self.acts << Activity.new(:user_id => self.user_id)        
        self.acts << Activity.new(:user_id => self.jour_id)
      end
    elsif self.jour_type == 'Project'
      self.acts << Activity.new(:user_id => self.reply_id)
    elsif self.jour_type == 'Course'
      self.acts << Activity.new(:user_id => self.reply_id)
    else
    end
  end

  def reset_counters!
    self.class.reset_counters!(self)
  end
  def self.reset_counters! journals_for_messages
    # jfm_id = journals_for_messages.id.to_i
    count = find_all_by_m_parent_id(journals_for_messages.m_parent_id).count #(SELECT COUNT(*) FROM #{JournalsForMessage.table_name} WHERE m_parent_id = #{jfm_id} )
    update_all("m_reply_count = #{count.to_i}", ["id = ?", journals_for_messages.m_parent_id])
  end

  #如果是在项目中留言则返回该项目否则返回nil - zjc
  def project
    if self.jour_type == 'Project'
      Project.find(self.jour_id)
    else
      nil
    end
  end

  # 更新用户分数     -by zjc
  def be_user_score
    #新建了留言回复
    if self.reply_id != 0
      #协同得分加分
      UserScore.joint(:reply_message, self.user,User.find(self.reply_id),self, { journals_for_messages_id: self.id })
      update_replay_for_message(self.user,1)
      if self.jour_type == "Project"
        update_replay_for_message(self.user,2,self.jour)
      end
    end
  end
  # 更新用户分数     -by zjc
  def down_user_score
    #删除了留言回复
    if self.reply_id != 0
      #协同得分减分
      UserScore.joint(:reply_message_delete, self.user,User.find(self.reply_id), { journals_for_messages_id: self.id })
      update_replay_for_message(self.user,1)
      if self.jour_type == "Project"
        update_replay_for_message(self.user,2,self.jour)
      end
    end
  end

  def expire_cache
    ActionController::Base.new.expire_fragment('activities')
  end
end