forked from treehouse/mastodon
131 lines
4.5 KiB
Ruby
131 lines
4.5 KiB
Ruby
# frozen_string_literal: true
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require 'singleton'
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class FeedManager
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include Singleton
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MAX_ITEMS = 800
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def key(type, id)
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"feed:#{type}:#{id}"
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end
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def filter?(timeline_type, status, receiver)
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if timeline_type == :home
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filter_from_home?(status, receiver)
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elsif timeline_type == :mentions
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filter_from_mentions?(status, receiver)
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elsif timeline_type == :public
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filter_from_public?(status, receiver)
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else
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false
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end
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end
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def push(timeline_type, account, status)
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redis.zadd(key(timeline_type, account.id), status.id, status.reblog? ? status.reblog_of_id : status.id)
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trim(timeline_type, account.id)
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broadcast(account.id, type: 'update', timeline: timeline_type, message: inline_render(account, 'api/v1/statuses/show', status))
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end
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def broadcast(timeline_id, options = {})
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ActionCable.server.broadcast("timeline:#{timeline_id}", options)
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end
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def trim(type, account_id)
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return unless redis.zcard(key(type, account_id)) > FeedManager::MAX_ITEMS
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last = redis.zrevrange(key(type, account_id), FeedManager::MAX_ITEMS - 1, FeedManager::MAX_ITEMS - 1)
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redis.zremrangebyscore(key(type, account_id), '-inf', "(#{last.last}")
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end
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def merge_into_timeline(from_account, into_account)
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timeline_key = key(:home, into_account.id)
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from_account.statuses.limit(MAX_ITEMS).each do |status|
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next if filter?(:home, status, into_account)
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redis.zadd(timeline_key, status.id, status.id)
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end
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trim(:home, into_account.id)
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end
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def unmerge_from_timeline(from_account, into_account)
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timeline_key = key(:home, into_account.id)
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from_account.statuses.select('id').find_each do |status|
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redis.zrem(timeline_key, status.id)
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redis.zremrangebyscore(timeline_key, status.id, status.id)
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end
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end
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def inline_render(target_account, template, object)
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rabl_scope = Class.new do
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include RoutingHelper
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def initialize(account)
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@account = account
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end
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def current_user
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@account.try(:user)
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end
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def current_account
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@account
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end
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end
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Rabl::Renderer.new(template, object, view_path: 'app/views', format: :json, scope: rabl_scope.new(target_account)).render
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end
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private
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def redis
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Redis.current
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end
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def filter_from_home?(status, receiver)
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should_filter = false
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if status.reply? && !status.in_reply_to_account_id.nil? # Filter out if it's a reply
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should_filter = !receiver.following?(status.in_reply_to_account) # and I'm not following the person it's a reply to
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should_filter &&= !(receiver.id == status.in_reply_to_account_id) # and it's not a reply to me
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should_filter &&= !(status.account_id == status.in_reply_to_account_id) # and it's not a self-reply
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elsif status.reblog? # Filter out a reblog
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should_filter = receiver.blocking?(status.reblog.account) # if I'm blocking the reblogged person
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end
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should_filter ||= receiver.blocking?(status.mentions.map(&:account_id)) # or if it mentions someone I blocked
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should_filter
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end
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def filter_from_mentions?(status, receiver)
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should_filter = receiver.id == status.account_id # Filter if I'm mentioning myself
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should_filter ||= receiver.blocking?(status.account) # or it's from someone I blocked
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should_filter ||= receiver.blocking?(status.mentions.includes(:account).map(&:account)) # or if it mentions someone I blocked
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should_filter ||= (status.account.silenced? && !receiver.following?(status.account)) # of if the account is silenced and I'm not following them
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should_filter ||= (status.private_visibility? && !receiver.following?(status.account)) # or if the mentioned account is not permitted to see the private status
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if status.reply? && !status.in_reply_to_account_id.nil? # or it's a reply
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should_filter ||= receiver.blocking?(status.in_reply_to_account) # to a user I blocked
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end
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should_filter
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end
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def filter_from_public?(status, receiver)
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should_filter = receiver.blocking?(status.account)
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should_filter ||= receiver.blocking?(status.mentions.includes(:account).map(&:account))
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if status.reply? && !status.in_reply_to_account_id.nil?
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should_filter ||= receiver.blocking?(status.in_reply_to_account)
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elsif status.reblog?
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should_filter ||= receiver.blocking?(status.reblog.account)
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end
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should_filter
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end
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end
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