mastodon/app/services/activitypub/fetch_remote_poll_service.rb

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# frozen_string_literal: true
class ActivityPub::FetchRemotePollService < BaseService
include JsonLdHelper
def call(poll, on_behalf_of = nil)
@json = fetch_resource(poll.status.uri, true, on_behalf_of)
return unless supported_context? && expected_type?
expires_at = begin
if @json['closed'].is_a?(String)
@json['closed']
elsif !@json['closed'].nil? && !@json['closed'].is_a?(FalseClass)
Time.now.utc
else
@json['endTime']
end
end
items = begin
if @json['anyOf'].is_a?(Array)
@json['anyOf']
else
@json['oneOf']
end
end
latest_options = items.map { |item| item['name'].presence || item['content'] }
# If for some reasons the options were changed, it invalidates all previous
# votes, so we need to remove them
poll.votes.delete_all if latest_options != poll.options
begin
poll.update!(
last_fetched_at: Time.now.utc,
expires_at: expires_at,
options: latest_options,
cached_tallies: items.map { |item| item.dig('replies', 'totalItems') || 0 }
)
rescue ActiveRecord::StaleObjectError
poll.reload
retry
end
end
private
def supported_context?
super(@json)
end
def expected_type?
equals_or_includes_any?(@json['type'], %w(Question))
end
end