268 lines
8.0 KiB
Ruby
268 lines
8.0 KiB
Ruby
# frozen_string_literal: true
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class ProcessFeedService < BaseService
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def call(body, account)
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xml = Nokogiri::XML(body)
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xml.encoding = 'utf-8'
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update_author(xml, account)
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process_entries(xml, account)
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end
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private
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def update_author(xml, account)
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return if xml.at_xpath('/xmlns:feed', xmlns: TagManager::XMLNS).nil?
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UpdateRemoteProfileService.new.call(xml.at_xpath('/xmlns:feed', xmlns: TagManager::XMLNS), account, true)
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end
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def process_entries(xml, account)
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xml.xpath('//xmlns:entry', xmlns: TagManager::XMLNS).reverse_each.map { |entry| ProcessEntry.new.call(entry, account) }.compact
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end
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class ProcessEntry
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def call(xml, account)
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@account = account
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@xml = xml
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return if skip_unsupported_type?
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case verb
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when :post, :share
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return create_status
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when :delete
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return delete_status
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end
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rescue ActiveRecord::RecordInvalid => e
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Rails.logger.debug "Nothing was saved for #{id} because: #{e}"
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nil
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end
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private
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def create_status
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Rails.logger.debug "Creating remote status #{id}"
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status, just_created = status_from_xml(@xml)
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return if status.nil?
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return status unless just_created
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if verb == :share
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original_status, = status_from_xml(@xml.at_xpath('.//activity:object', activity: TagManager::AS_XMLNS))
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status.reblog = original_status
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if original_status.nil?
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status.destroy
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return nil
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elsif original_status.reblog?
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status.reblog = original_status.reblog
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end
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end
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status.save!
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notify_about_mentions!(status) unless status.reblog?
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notify_about_reblog!(status) if status.reblog? && status.reblog.account.local?
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Rails.logger.debug "Queuing remote status #{status.id} (#{id}) for distribution"
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DistributionWorker.perform_async(status.id)
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status
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end
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def notify_about_mentions!(status)
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status.mentions.includes(:account).each do |mention|
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mentioned_account = mention.account
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next unless mentioned_account.local?
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NotifyService.new.call(mentioned_account, mention)
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end
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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 delete_status
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Rails.logger.debug "Deleting remote status #{id}"
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status = Status.find_by(uri: id)
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RemoveStatusService.new.call(status) unless status.nil?
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nil
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end
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def skip_unsupported_type?
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!([:post, :share, :delete].include?(verb) && [:activity, :note, :comment].include?(type))
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end
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def status_from_xml(entry)
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# Return early if status already exists in db
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status = find_status(id(entry))
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return [status, false] unless status.nil?
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# If status embeds an author, find that author
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# If that author cannot be found, don't record the status (do not misattribute)
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if account?(entry)
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begin
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account = find_or_resolve_account(acct(entry))
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return [nil, false] if account.nil?
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rescue Goldfinger::Error
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return [nil, false]
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end
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else
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account = @account
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end
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return [nil, false] if account.suspended?
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status = Status.create!(
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uri: id(entry),
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url: url(entry),
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account: account,
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text: content(entry),
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spoiler_text: content_warning(entry),
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created_at: published(entry),
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reply: thread?(entry),
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visibility: visibility_scope(entry)
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)
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if thread?(entry)
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Rails.logger.debug "Trying to attach #{status.id} (#{id(entry)}) to #{thread(entry).first}"
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status.thread = find_or_resolve_status(status, *thread(entry))
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end
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mentions_from_xml(status, entry)
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hashtags_from_xml(status, entry)
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media_from_xml(status, entry)
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[status, true]
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end
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def find_or_resolve_account(acct)
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FollowRemoteAccountService.new.call(acct)
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end
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def find_or_resolve_status(parent, uri, url)
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status = find_status(uri)
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ThreadResolveWorker.perform_async(parent.id, url) if status.nil?
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status
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end
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def find_status(uri)
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if TagManager.instance.local_id?(uri)
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local_id = TagManager.instance.unique_tag_to_local_id(uri, 'Status')
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return Status.find(local_id)
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end
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Status.find_by(uri: uri)
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end
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def mentions_from_xml(parent, xml)
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processed_account_ids = []
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xml.xpath('./xmlns:link[@rel="mentioned"]', xmlns: TagManager::XMLNS).each do |link|
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next if [TagManager::TYPES[:group], TagManager::TYPES[:collection]].include? link['ostatus:object-type']
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url = Addressable::URI.parse(link['href'])
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mentioned_account = if TagManager.instance.local_domain?(url.host)
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Account.find_local(url.path.gsub('/users/', ''))
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else
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Account.find_by(url: link['href']) || FetchRemoteAccountService.new.call(link['href'])
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end
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next if mentioned_account.nil? || processed_account_ids.include?(mentioned_account.id)
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mentioned_account.mentions.where(status: parent).first_or_create(status: parent)
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# So we can skip duplicate mentions
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processed_account_ids << mentioned_account.id
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end
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end
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def hashtags_from_xml(parent, xml)
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tags = xml.xpath('./xmlns:category', xmlns: TagManager::XMLNS).map { |category| category['term'] }.select { |t| !t.blank? }
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ProcessHashtagsService.new.call(parent, tags)
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end
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def media_from_xml(parent, xml)
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return if DomainBlock.find_by(domain: parent.account.domain)&.reject_media?
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xml.xpath('./xmlns:link[@rel="enclosure"]', xmlns: TagManager::XMLNS).each do |link|
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next unless link['href']
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media = MediaAttachment.where(status: parent, remote_url: link['href']).first_or_initialize(account: parent.account, status: parent, remote_url: link['href'])
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parsed_url = URI.parse(link['href'])
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next if !%w(http https).include?(parsed_url.scheme) || parsed_url.host.empty?
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begin
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media.file_remote_url = link['href']
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media.save
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rescue OpenURI::HTTPError, Paperclip::Errors::NotIdentifiedByImageMagickError
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next
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end
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end
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end
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def id(xml = @xml)
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xml.at_xpath('./xmlns:id', xmlns: TagManager::XMLNS).content
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end
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def verb(xml = @xml)
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raw = xml.at_xpath('./activity:verb', activity: TagManager::AS_XMLNS).content
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TagManager::VERBS.key(raw)
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rescue
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:post
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end
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def type(xml = @xml)
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raw = xml.at_xpath('./activity:object-type', activity: TagManager::AS_XMLNS).content
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TagManager::TYPES.key(raw)
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rescue
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:activity
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end
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def url(xml = @xml)
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link = xml.at_xpath('./xmlns:link[@rel="alternate"]', xmlns: TagManager::XMLNS)
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link.nil? ? nil : link['href']
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end
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def content(xml = @xml)
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xml.at_xpath('./xmlns:content', xmlns: TagManager::XMLNS).content
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end
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def content_warning(xml = @xml)
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xml.at_xpath('./xmlns:summary', xmlns: TagManager::XMLNS)&.content || ''
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end
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def visibility_scope(xml = @xml)
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xml.at_xpath('./mastodon:scope', mastodon: TagManager::MTDN_XMLNS)&.content&.to_sym || :public
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end
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def published(xml = @xml)
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xml.at_xpath('./xmlns:published', xmlns: TagManager::XMLNS).content
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end
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def thread?(xml = @xml)
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!xml.at_xpath('./thr:in-reply-to', thr: TagManager::THR_XMLNS).nil?
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end
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def thread(xml = @xml)
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thr = xml.at_xpath('./thr:in-reply-to', thr: TagManager::THR_XMLNS)
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[thr['ref'], thr['href']]
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end
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def account?(xml = @xml)
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!xml.at_xpath('./xmlns:author', xmlns: TagManager::XMLNS).nil?
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end
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def acct(xml = @xml)
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username = xml.at_xpath('./xmlns:author/xmlns:name', xmlns: TagManager::XMLNS).content
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url = xml.at_xpath('./xmlns:author/xmlns:uri', xmlns: TagManager::XMLNS).content
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domain = Addressable::URI.parse(url).host
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"#{username}@#{domain}"
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end
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end
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end
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