141 lines
3.5 KiB
Ruby
141 lines
3.5 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::Activity
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include JsonLdHelper
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def initialize(json, account, **options)
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@json = json
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@account = account
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@object = @json['object']
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@options = options
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end
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def perform
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raise NotImplementedError
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end
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class << self
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def factory(json, account, **options)
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@json = json
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klass&.new(json, account, options)
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end
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private
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def klass
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case @json['type']
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when 'Create'
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ActivityPub::Activity::Create
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when 'Announce'
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ActivityPub::Activity::Announce
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when 'Delete'
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ActivityPub::Activity::Delete
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when 'Follow'
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ActivityPub::Activity::Follow
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when 'Like'
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ActivityPub::Activity::Like
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when 'Block'
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ActivityPub::Activity::Block
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when 'Update'
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ActivityPub::Activity::Update
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when 'Undo'
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ActivityPub::Activity::Undo
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when 'Accept'
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ActivityPub::Activity::Accept
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when 'Reject'
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ActivityPub::Activity::Reject
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when 'Flag'
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ActivityPub::Activity::Flag
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when 'Add'
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ActivityPub::Activity::Add
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when 'Remove'
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ActivityPub::Activity::Remove
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when 'Move'
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ActivityPub::Activity::Move
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end
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end
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end
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protected
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def status_from_uri(uri)
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ActivityPub::TagManager.instance.uri_to_resource(uri, Status)
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end
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def account_from_uri(uri)
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ActivityPub::TagManager.instance.uri_to_resource(uri, Account)
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end
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def object_uri
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@object_uri ||= value_or_id(@object)
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end
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def redis
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Redis.current
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end
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def distribute(status)
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crawl_links(status)
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notify_about_reblog(status) if reblog_of_local_account?(status)
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notify_about_mentions(status)
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# Only continue if the status is supposed to have arrived in real-time.
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# Note that if @options[:override_timestamps] isn't set, the status
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# may have a lower snowflake id than other existing statuses, potentially
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# "hiding" it from paginated API calls
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return unless @options[:override_timestamps] || status.within_realtime_window?
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distribute_to_followers(status)
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end
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def reblog_of_local_account?(status)
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status.reblog? && status.reblog.account.local?
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end
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def notify_about_reblog(status)
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NotifyService.new.call(status.reblog.account, status)
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end
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def notify_about_mentions(status)
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status.active_mentions.includes(:account).each do |mention|
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next unless mention.account.local? && audience_includes?(mention.account)
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NotifyService.new.call(mention.account, mention)
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end
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end
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def crawl_links(status)
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return if status.spoiler_text?
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# Spread out crawling randomly to avoid DDoSing the link
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LinkCrawlWorker.perform_in(rand(1..59).seconds, status.id)
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end
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def distribute_to_followers(status)
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::DistributionWorker.perform_async(status.id)
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end
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def delete_arrived_first?(uri)
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redis.exists("delete_upon_arrival:#{@account.id}:#{uri}")
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end
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def delete_later!(uri)
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redis.setex("delete_upon_arrival:#{@account.id}:#{uri}", 6.hours.seconds, uri)
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end
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def fetch_remote_original_status
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if object_uri.start_with?('http')
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return if ActivityPub::TagManager.instance.local_uri?(object_uri)
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ActivityPub::FetchRemoteStatusService.new.call(object_uri, id: true, on_behalf_of: @account.followers.local.first)
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elsif @object['url'].present?
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::FetchRemoteStatusService.new.call(@object['url'])
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end
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end
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def lock_or_return(key, expire_after = 7.days.seconds)
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yield if redis.set(key, true, nx: true, ex: expire_after)
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ensure
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redis.del(key)
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end
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end
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