require 'singleton' class FeedManager include Singleton MAX_ITEMS = 800 def key(type, id) "feed:#{type}:#{id}" end def filter?(timeline_type, status, receiver) if timeline_type == :home filter_from_home?(status, receiver) elsif timeline_type == :mentions filter_from_mentions?(status, receiver) else false end end def push(timeline_type, account, status) redis.zadd(key(timeline_type, account.id), status.id, status.reblog? ? status.reblog_of_id : status.id) trim(timeline_type, account.id) broadcast(account.id, type: 'update', timeline: timeline_type, message: inline_render(account, status)) end def broadcast(timeline_id, options = {}) ActionCable.server.broadcast("timeline:#{timeline_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 def inline_render(target_account, status) rabl_scope = Class.new do include RoutingHelper def initialize(account) @account = account end def current_user @account.try(:user) end def current_account @account end end Rabl::Renderer.new('api/v1/statuses/show', status, view_path: 'app/views', format: :json, scope: rabl_scope.new(target_account)).render end private def redis $redis end def filter_from_home?(status, receiver) should_filter = false if status.reply? && !status.thread.account.nil? # Filter out if it's a reply should_filter = !receiver.following?(status.thread.account) # and I'm not following the person it's a reply to should_filter = should_filter && !(receiver.id == status.thread.account_id) # and it's not a reply to me should_filter = should_filter && !(status.account_id == status.thread.account_id) # and it's not a self-reply elsif status.reblog? # Filter out a reblog should_filter = receiver.blocking?(status.reblog.account) # if I'm blocking the reblogged person end should_filter end def filter_from_mentions?(status, receiver) should_filter = receiver.id == status.account_id # Filter if I'm mentioning myself should_filter = should_filter || receiver.blocking?(status.account) # or it's from someone I blocked should_filter end end