class PostTimestampChanger def initialize(params) @topic = params[:topic] || Topic.with_deleted.find(params[:topic_id]) @posts = @topic.posts @timestamp = Time.at(params[:timestamp]) @time_difference = calculate_time_difference end def change! ActiveRecord::Base.transaction do last_posted_at = @timestamp @posts.each do |post| if post.is_first_post? update_post(post, @timestamp) else new_created_at = Time.at(post.created_at.to_f + @time_difference) last_posted_at = new_created_at if new_created_at > last_posted_at update_post(post, new_created_at) end end update_topic(last_posted_at) yield(@topic) if block_given? end # Burst the cache for stats [AdminDashboardData, About].each { |klass| $redis.del klass.stats_cache_key } end private def calculate_time_difference @timestamp - @topic.created_at end def update_topic(last_posted_at) @topic.update_attributes( created_at: @timestamp, updated_at: @timestamp, bumped_at: @timestamp, last_posted_at: last_posted_at ) end def update_post(post, timestamp) post.update_attributes(created_at: timestamp, updated_at: timestamp) end end