require 'singleton' class FeedManager include Singleton MAX_ITEMS = 800 def key(type, id) "feed:#{type}:#{id}" end # Filter status out of the home feed if it is a reply to someone the user doesn't follow def filter_status?(status, follower) replied_to_user = status.reply? ? status.thread.account : nil (status.reply? && !(follower.id == replied_to_user.id || replied_to_user.id == status.account_id || follower.following?(replied_to_user))) end def push(timeline_type, account, status) redis.zadd(key(timeline_type, account.id), status.id, status.id) trim(timeline_type, account.id) broadcast(account.id, type: 'update', timeline: timeline_type, message: inline_render(account, status)) end def broadcast(account_id, options = {}) ActionCable.server.broadcast("timeline:#{account_id}", options) end def trim(type, account_id) return unless redis.zcard(key(type, account_id)) > FeedManager::MAX_ITEMS last = redis.zrevrange(key(type, account_id), FeedManager::MAX_ITEMS - 1, FeedManager::MAX_ITEMS - 1) redis.zremrangebyscore(key(type, account_id), '-inf', "(#{last.last}") end private def redis $redis end def inline_render(target_account, status) rabl_scope = Class.new do include RoutingHelper def initialize(account) @account = account end def current_user @account.user end def current_account @account end end Rabl::Renderer.new('api/statuses/show', status, view_path: 'app/views', format: :json, scope: rabl_scope.new(target_account)).render end end