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# frozen_string_literal: true
class ActivityPub::FetchAccountStatusesService < BaseService
include JsonLdHelper
include Redisable
MAX_PAGES = 100
def call(account, url = nil)
return if account.local? || account.suspended?
@account = account
@items = Rails.cache.fetch(sync_key) || []
return if redis.get(cooldown_key).present? && @items.empty?
RedisLock.acquire(lock_options) do |lock|
return unless lock.acquired?
redis.set(cooldown_key, 1, ex: 1.day)
@json = fetch_collection(url || account.outbox_url)
page = 1
if @items.empty?
until page == MAX_PAGES || @json.blank?
items = collection_items(@json).select { |item| item['type'] == 'Create' }
@items.concat(items)
break if @json['next'].blank?
page += 1
@json = fetch_collection(@json['next'])
end
end
Rails.cache.write(sync_key, @items, expires_in: 1.day)
process_items(@items)
Rails.cache.delete(sync_key)
redis.expire(cooldown_key, 1.week)
end
@items
end
private
def sync_key
"account_sync:#{@account.id}"
end
def cooldown_key
"account_sync:#{@account.id}:cooldown"
end
def lock_options
{ redis: Redis.current, key: "account_sync:#{@account.id}:lock" }
end
def fetch_collection(collection_or_uri)
return collection_or_uri if collection_or_uri.is_a?(Hash)
collection = _fetch_collection(collection_or_uri)
return unless collection.is_a?(Hash)
if collection['first'].present?
collection = _fetch_collection(collection['first'])
return unless collection.is_a?(Hash)
end
collection
end
def _fetch_collection(collection_or_uri)
return collection_or_uri if collection_or_uri.is_a?(Hash)
return if invalid_origin?(collection_or_uri)
fetch_resource_without_id_validation(collection_or_uri, @account.followers.local.first, false)
end
def collection_items(collection)
case collection['type']
when 'Collection', 'CollectionPage'
collection['items']
when 'OrderedCollection', 'OrderedCollectionPage'
collection['orderedItems']
end
end
def process_items(items)
items.reverse_each.map { |item| process_item(item) }.compact
end
def process_item(item)
return unless item.is_a?(Hash) && item['type'].present?
ActivityPub::Activity.factory(item, @account, requested: true)&.perform
rescue => e
Rails.logger.error("Failed to process #{item['type']} #{item['id']} due to #{e}: #{e.message}")
Rails.logger.error("Stack trace: #{e.backtrace.map {|l| " #{l}\n"}.join}")
end
end
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