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|
class ProcessFeedService < BaseService
# Create local statuses from an Atom feed
# @param [String] body Atom feed
# @param [Account] account Account this feed belongs to
def call(body, account)
xml = Nokogiri::XML(body)
update_remote_profile_service.(xml.at_xpath('/xmlns:feed/xmlns:author'), account) unless xml.at_xpath('/xmlns:feed').nil?
xml.xpath('//xmlns:entry').each { |entry| process_entry(account, entry) }
end
private
def process_entry(account, entry)
return unless [:note, :comment, :activity].include? object_type(entry)
status = Status.find_by(uri: activity_id(entry))
# If we already have a post and the verb is now "delete", we gotta delete it and move on!
if !status.nil? && verb(entry) == :delete
delete_post!(status)
return
end
return unless status.nil?
status = Status.new(uri: activity_id(entry), url: activity_link(entry), account: account, text: content(entry), created_at: published(entry), updated_at: updated(entry))
if verb(entry) == :share
add_reblog!(entry, status)
elsif verb(entry) == :post
if thread_id(entry).nil?
add_post!(entry, status)
else
add_reply!(entry, status)
end
end
# If we added a status, go through accounts it mentions and create respective relations
unless status.new_record?
record_remote_mentions(status, entry.xpath('./xmlns:link[@rel="mentioned"]'))
DistributionWorker.perform_async(status.id)
end
end
def record_remote_mentions(status, links)
# Here we have to do a reverse lookup of local accounts by their URL!
# It's not pretty at all! I really wish all these protocols sticked to
# using acct:username@domain only! It would make things so much easier
# and tidier
links.each do |mention_link|
href = Addressable::URI.parse(mention_link.attribute('href').value)
if href.host == Rails.configuration.x.local_domain
# A local user is mentioned
mentioned_account = Account.find_local(href.path.gsub('/users/', ''))
unless mentioned_account.nil?
mentioned_account.mentions.where(status: status).first_or_create(status: status)
NotificationMailer.mention(mentioned_account, status).deliver_later
end
else
# What to do about remote user?
# Are we supposed to do a search in the database by URL?
# We could technically open the URL, look for LRDD tags, get webfinger that way,
# finally acquire the acct:username@domain form, and then check DB
end
end
end
def add_post!(_entry, status)
status.save!
end
def add_reblog!(entry, status)
status.reblog = find_original_status(entry, target_id(entry))
if status.reblog.nil?
status.reblog = fetch_remote_status(entry)
end
if !status.reblog.nil?
status.save!
NotificationMailer.reblog(status.reblog, status.account).deliver_later if status.reblog.local?
end
end
def add_reply!(entry, status)
status.thread = find_original_status(entry, thread_id(entry))
status.save!
end
def delete_post!(status)
status.destroy!
end
def find_original_status(_xml, id)
return nil if id.nil?
if local_id?(id)
Status.find(unique_tag_to_local_id(id, 'Status'))
else
Status.find_by(uri: id)
end
end
def fetch_remote_status(xml)
username = xml.at_xpath('./activity:object/xmlns:author/xmlns:name').content
url = xml.at_xpath('./activity:object/xmlns:author/xmlns:uri').content
domain = Addressable::URI.parse(url).host
account = Account.find_by(username: username, domain: domain)
if account.nil?
account = follow_remote_account_service.("#{username}@#{domain}", false)
return nil if account.nil?
end
Status.new(account: account, uri: target_id(xml), text: target_content(xml), url: target_url(xml))
end
def published(xml)
xml.at_xpath('./xmlns:published').content
end
def updated(xml)
xml.at_xpath('./xmlns:updated').content
end
def content(xml)
xml.at_xpath('./xmlns:content').content
end
def thread_id(xml)
xml.at_xpath('./thr:in-reply-to').attribute('ref').value
rescue
nil
end
def target_id(xml)
xml.at_xpath('.//activity:object/xmlns:id').content
rescue
nil
end
def activity_id(xml)
xml.at_xpath('./xmlns:id').content
end
def activity_link(xml)
xml.at_xpath('./xmlns:link[@rel="alternate"]').attribute('href').value
rescue
''
end
def target_content(xml)
xml.at_xpath('.//activity:object/xmlns:content').content
end
def target_url(xml)
xml.at_xpath('.//activity:object/xmlns:link[@rel="alternate"]').attribute('href').value
end
def object_type(xml)
xml.at_xpath('./activity:object-type').content.gsub('http://activitystrea.ms/schema/1.0/', '').to_sym
rescue
:note
end
def verb(xml)
xml.at_xpath('./activity:verb').content.gsub('http://activitystrea.ms/schema/1.0/', '').to_sym
rescue
:post
end
def follow_remote_account_service
@follow_remote_account_service ||= FollowRemoteAccountService.new
end
def update_remote_profile_service
@update_remote_profile_service ||= UpdateRemoteProfileService.new
end
end
|
