require_dependency 'rate_limiter' require_dependency 'system_message' class PostAction < ActiveRecord::Base class AlreadyFlagged < StandardError; end include RateLimiter::OnCreateRecord attr_accessible :post_action_type_id, :post_id, :user_id, :post, :user, :post_action_type, :message belongs_to :post belongs_to :user belongs_to :post_action_type acts_as_paranoid rate_limit :post_action_rate_limiter validate :message_quality def self.update_flagged_posts_count posts_flagged_count = PostAction.joins(post: :topic) .where('post_actions.post_action_type_id' => PostActionType.flag_types.values, 'posts.deleted_at' => nil, 'topics.deleted_at' => nil).count('DISTINCT posts.id') $redis.set('posts_flagged_count', posts_flagged_count) admins = User.where(admin: true).select(:id).map {|u| u.id} MessageBus.publish('/flagged_counts', { total: posts_flagged_count }, { user_ids: admins }) end def self.flagged_posts_count $redis.get('posts_flagged_count').to_i end def self.counts_for(collection, user) return {} if collection.blank? collection_ids = collection.map {|p| p.id} user_id = user.present? ? user.id : 0 result = PostAction.where(post_id: collection_ids, user_id: user_id) user_actions = {} result.each do |r| user_actions[r.post_id] ||= {} user_actions[r.post_id][r.post_action_type_id] = r end user_actions end def self.count_likes_per_day(since = 30.days.ago) where(post_action_type_id: PostActionType.types[:like]).where('created_at > ?', since).group('date(created_at)').order('date(created_at)').count end def self.clear_flags!(post, moderator_id, action_type_id = nil) # -1 is the automatic system cleary actions = if action_type_id [action_type_id] else moderator_id == -1 ? PostActionType.auto_action_flag_types.values : PostActionType.flag_types.values end PostAction.update_all({ deleted_at: Time.now, deleted_by: moderator_id }, { post_id: post.id, post_action_type_id: actions }) f = actions.map{|t| ["#{PostActionType.types[t]}_count", 0]} Post.with_deleted.update_all(Hash[*f.flatten], id: post.id) update_flagged_posts_count end def self.act(user, post, post_action_type_id, message = nil) begin create(post_id: post.id, user_id: user.id, post_action_type_id: post_action_type_id, message: message) rescue ActiveRecord::RecordNotUnique # can happen despite being .create # since already bookmarked true end end def self.remove_act(user, post, post_action_type_id) if action = where(post_id: post.id, user_id: user.id, post_action_type_id: post_action_type_id).first action.destroy action.deleted_at = Time.now action.run_callbacks(:save) end end def is_bookmark? post_action_type_id == PostActionType.types[:bookmark] end def is_like? post_action_type_id == PostActionType.types[:like] end def is_flag? PostActionType.flag_types.values.include?(post_action_type_id) end # A custom rate limiter for this model def post_action_rate_limiter return unless is_flag? || is_bookmark? || is_like? return @rate_limiter if @rate_limiter.present? %w(like flag bookmark).each do |type| if send("is_#{type}?") @rate_limiter = RateLimiter.new(user, "create_#{type}:#{Date.today.to_s}", SiteSetting.send("max_#{type}s_per_day"), 1.day.to_i) return @rate_limiter end end end def message_quality return if message.blank? sentinel = TextSentinel.title_sentinel(message) if sentinel.valid? # It's possible the sentinel has cleaned up the title a bit self.message = sentinel.text else errors.add(:message, I18n.t(:is_invalid)) unless sentinel.valid? end end before_create do raise AlreadyFlagged if is_flag? && PostAction.where(user_id: user_id, post_id: post_id, post_action_type_id: PostActionType.flag_types.values).exists? end after_save do # Update denormalized counts post_action_type = PostActionType.types[post_action_type_id] column = "#{post_action_type.to_s}_count" delta = deleted_at.nil? ? 1 : -1 # Voting also changes the sort_order if post_action_type == :vote Post.update_all ["vote_count = vote_count + :delta, sort_order = :max - (vote_count + :delta)", delta: delta, max: Topic.max_sort_order], id: post_id else Post.update_all ["#{column} = #{column} + ?", delta], id: post_id end Topic.update_all ["#{column} = #{column} + ?", delta], id: post.topic_id if PostActionType.flag_types.values.include?(post_action_type_id) PostAction.update_flagged_posts_count end if SiteSetting.flags_required_to_hide_post > 0 # automatic hiding of posts flag_counts = exec_sql("SELECT SUM(CASE WHEN deleted_at IS NULL THEN 1 ELSE 0 END) AS new_flags, SUM(CASE WHEN deleted_at IS NOT NULL THEN 1 ELSE 0 END) AS old_flags FROM post_actions WHERE post_id = ? AND post_action_type_id IN (?)", post.id, PostActionType.auto_action_flag_types.values).first old_flags, new_flags = flag_counts['old_flags'].to_i, flag_counts['new_flags'].to_i if new_flags >= SiteSetting.flags_required_to_hide_post reason = old_flags > 0 ? Post.hidden_reasons[:flag_threshold_reached_again] : Post.hidden_reasons[:flag_threshold_reached] Post.update_all(["hidden = true, hidden_reason_id = COALESCE(hidden_reason_id, ?)", reason], id: post_id) Topic.update_all({ visible: false }, ["id = :topic_id AND NOT EXISTS(SELECT 1 FROM POSTS WHERE topic_id = :topic_id AND NOT hidden)", topic_id: post.topic_id]) # inform user if post.user SystemMessage.create(post.user, :post_hidden, url: post.url, edit_delay: SiteSetting.cooldown_minutes_after_hiding_posts) end end end end end