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# frozen_string_literal: true
class VoteService < BaseService
include Authorization
include Payloadable
include Redisable
def call(account, poll, choices)
authorize_with account, poll, :vote?
@account = account
@poll = poll
@choices = choices
@votes = []
already_voted = true
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
already_voted = @poll.votes.where(account: @account).exists?
ApplicationRecord.transaction do
@choices.each do |choice|
@votes << @poll.votes.create!(account: @account, choice: Integer(choice))
end
end
else
raise Mastodon::RaceConditionError
end
end
increment_voters_count! unless already_voted
ActivityTracker.increment('activity:interactions')
if @poll.account.local?
distribute_poll!
else
deliver_votes!
queue_final_poll_check!
end
end
private
def distribute_poll!
return if @poll.hide_totals?
ActivityPub::DistributePollUpdateWorker.perform_in(3.minutes, @poll.status.id)
end
def queue_final_poll_check!
return unless @poll.expires?
PollExpirationNotifyWorker.perform_at(@poll.expires_at + 5.minutes, @poll.id)
end
def deliver_votes!
@votes.each do |vote|
ActivityPub::DeliveryWorker.perform_async(
build_json(vote),
@account.id,
@poll.account.inbox_url
)
end
end
def build_json(vote)
Oj.dump(serialize_payload(vote, ActivityPub::VoteSerializer))
end
def increment_voters_count!
unless @poll.voters_count.nil?
@poll.voters_count = @poll.voters_count + 1
@poll.save
end
rescue ActiveRecord::StaleObjectError
@poll.reload
retry
end
def lock_options
{ redis: redis, key: "vote:#{@poll.id}:#{@account.id}" }
end
end
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