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whippy-edition/app/lib/activitypub/activity/create.rb

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# frozen_string_literal: true
class ActivityPub::Activity::Create < ActivityPub::Activity
SUPPORTED_TYPES = %w(Note).freeze
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CONVERTED_TYPES = %w(Image Video Article Page).freeze
def perform
return if delete_arrived_first?(object_uri) || unsupported_object_type? || invalid_origin?(@object['id'])
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
@status = find_existing_status
if @status.nil?
process_status
elsif @options[:delivered_to_account_id].present?
postprocess_audience_and_deliver
end
else
raise Mastodon::RaceConditionError
end
end
@status
end
private
def process_status
@tags = []
@mentions = []
@params = {}
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process_status_params
process_tags
process_audience
ApplicationRecord.transaction do
@status = Status.create!(@params)
attach_tags(@status)
end
resolve_thread(@status)
distribute(@status)
forward_for_reply if @status.public_visibility? || @status.unlisted_visibility?
end
def find_existing_status
status = status_from_uri(object_uri)
status ||= Status.find_by(uri: @object['atomUri']) if @object['atomUri'].present?
status
end
def process_status_params
@params = begin
{
uri: @object['id'],
url: object_url || @object['id'],
account: @account,
text: text_from_content || '',
language: detected_language,
spoiler_text: text_from_summary || '',
created_at: @object['published'],
override_timestamps: @options[:override_timestamps],
reply: @object['inReplyTo'].present?,
sensitive: @object['sensitive'] || false,
visibility: visibility_from_audience,
thread: replied_to_status,
conversation: conversation_from_uri(@object['conversation']),
media_attachment_ids: process_attachments.take(4).map(&:id),
}
end
end
def process_audience
(as_array(@object['to']) + as_array(@object['cc'])).uniq.each do |audience|
next if audience == ActivityPub::TagManager::COLLECTIONS[:public]
# Unlike with tags, there is no point in resolving accounts we don't already
# know here, because silent mentions would only be used for local access
# control anyway
account = account_from_uri(audience)
next if account.nil? || @mentions.any? { |mention| mention.account_id == account.id }
@mentions << Mention.new(account: account, silent: true)
# If there is at least one silent mention, then the status can be considered
# as a limited-audience status, and not strictly a direct message, but only
# if we considered a direct message in the first place
next unless @params[:visibility] == :direct
@params[:visibility] = :limited
end
# If the payload was delivered to a specific inbox, the inbox owner must have
# access to it, unless they already have access to it anyway
return if @options[:delivered_to_account_id].nil? || @mentions.any? { |mention| mention.account_id == @options[:delivered_to_account_id] }
@mentions << Mention.new(account_id: @options[:delivered_to_account_id], silent: true)
return unless @params[:visibility] == :direct
@params[:visibility] = :limited
end
def postprocess_audience_and_deliver
return if @status.mentions.find_by(account_id: @options[:delivered_to_account_id])
delivered_to_account = Account.find(@options[:delivered_to_account_id])
@status.mentions.create(account: delivered_to_account, silent: true)
@status.update(visibility: :limited) if @status.direct_visibility?
return unless delivered_to_account.following?(@account)
FeedInsertWorker.perform_async(@status.id, delivered_to_account.id, :home)
end
def attach_tags(status)
@tags.each do |tag|
status.tags << tag
TrendingTags.record_use!(tag, status.account, status.created_at) if status.public_visibility?
end
@mentions.each do |mention|
mention.status = status
mention.save
end
end
def process_tags
return if @object['tag'].nil?
as_array(@object['tag']).each do |tag|
if equals_or_includes?(tag['type'], 'Hashtag')
process_hashtag tag
elsif equals_or_includes?(tag['type'], 'Mention')
process_mention tag
elsif equals_or_includes?(tag['type'], 'Emoji')
process_emoji tag
end
end
end
def process_hashtag(tag)
return if tag['name'].blank?
hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
hashtag = Tag.where(name: hashtag).first_or_create!(name: hashtag)
return if @tags.include?(hashtag)
@tags << hashtag
rescue ActiveRecord::RecordInvalid
nil
end
def process_mention(tag)
return if tag['href'].blank?
account = account_from_uri(tag['href'])
account = ::FetchRemoteAccountService.new.call(tag['href'], id: false) if account.nil?
return if account.nil?
@mentions << Mention.new(account: account, silent: false)
end
def process_emoji(tag)
return if skip_download?
return if tag['name'].blank? || tag['icon'].blank? || tag['icon']['url'].blank?
shortcode = tag['name'].delete(':')
image_url = tag['icon']['url']
uri = tag['id']
updated = tag['updated']
emoji = CustomEmoji.find_by(shortcode: shortcode, domain: @account.domain)
return unless emoji.nil? || image_url != emoji.image_remote_url || (updated && updated >= emoji.updated_at)
emoji ||= CustomEmoji.new(domain: @account.domain, shortcode: shortcode, uri: uri)
emoji.image_remote_url = image_url
emoji.save
end
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def process_attachments
return [] if @object['attachment'].nil?
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media_attachments = []
as_array(@object['attachment']).each do |attachment|
next if attachment['url'].blank?
href = Addressable::URI.parse(attachment['url']).normalize.to_s
media_attachment = MediaAttachment.create(account: @account, remote_url: href, description: attachment['name'].presence, focus: attachment['focalPoint'])
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media_attachments << media_attachment
next if unsupported_media_type?(attachment['mediaType']) || skip_download?
media_attachment.file_remote_url = href
media_attachment.save
end
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media_attachments
rescue Addressable::URI::InvalidURIError => e
Rails.logger.debug e
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media_attachments
end
def resolve_thread(status)
return unless status.reply? && status.thread.nil?
ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)
end
def conversation_from_uri(uri)
return nil if uri.nil?
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return Conversation.find_by(id: OStatus::TagManager.instance.unique_tag_to_local_id(uri, 'Conversation')) if OStatus::TagManager.instance.local_id?(uri)
Conversation.find_by(uri: uri) || Conversation.create(uri: uri)
end
def visibility_from_audience
if equals_or_includes?(@object['to'], ActivityPub::TagManager::COLLECTIONS[:public])
:public
elsif equals_or_includes?(@object['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
:unlisted
elsif equals_or_includes?(@object['to'], @account.followers_url)
:private
else
:direct
end
end
def audience_includes?(account)
uri = ActivityPub::TagManager.instance.uri_for(account)
equals_or_includes?(@object['to'], uri) || equals_or_includes?(@object['cc'], uri)
end
def replied_to_status
return @replied_to_status if defined?(@replied_to_status)
if in_reply_to_uri.blank?
@replied_to_status = nil
else
@replied_to_status = status_from_uri(in_reply_to_uri)
@replied_to_status ||= status_from_uri(@object['inReplyToAtomUri']) if @object['inReplyToAtomUri'].present?
@replied_to_status
end
end
def in_reply_to_uri
value_or_id(@object['inReplyTo'])
end
def text_from_content
return Formatter.instance.linkify([text_from_name, object_url || @object['id']].join(' ')) if converted_object_type?
if @object['content'].present?
@object['content']
elsif content_language_map?
@object['contentMap'].values.first
end
end
def text_from_summary
if @object['summary'].present?
@object['summary']
elsif summary_language_map?
@object['summaryMap'].values.first
end
end
def text_from_name
if @object['name'].present?
@object['name']
elsif name_language_map?
@object['nameMap'].values.first
end
end
def detected_language
if content_language_map?
@object['contentMap'].keys.first
elsif name_language_map?
@object['nameMap'].keys.first
elsif summary_language_map?
@object['summaryMap'].keys.first
elsif supported_object_type?
LanguageDetector.instance.detect(text_from_content, @account)
end
end
def object_url
return if @object['url'].blank?
url_candidate = url_to_href(@object['url'], 'text/html')
if invalid_origin?(url_candidate)
nil
else
url_candidate
end
end
def summary_language_map?
@object['summaryMap'].is_a?(Hash) && !@object['summaryMap'].empty?
end
def content_language_map?
@object['contentMap'].is_a?(Hash) && !@object['contentMap'].empty?
end
def name_language_map?
@object['nameMap'].is_a?(Hash) && !@object['nameMap'].empty?
end
def unsupported_object_type?
@object.is_a?(String) || !(supported_object_type? || converted_object_type?)
end
def unsupported_media_type?(mime_type)
mime_type.present? && !(MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES).include?(mime_type)
end
def supported_object_type?
equals_or_includes_any?(@object['type'], SUPPORTED_TYPES)
end
def converted_object_type?
equals_or_includes_any?(@object['type'], CONVERTED_TYPES)
end
def skip_download?
return @skip_download if defined?(@skip_download)
@skip_download ||= DomainBlock.find_by(domain: @account.domain)&.reject_media?
end
def invalid_origin?(url)
return true if unsupported_uri_scheme?(url)
needle = Addressable::URI.parse(url).host
haystack = Addressable::URI.parse(@account.uri).host
!haystack.casecmp(needle).zero?
end
def reply_to_local?
!replied_to_status.nil? && replied_to_status.account.local?
end
def forward_for_reply
return unless @json['signature'].present? && reply_to_local?
ActivityPub::RawDistributionWorker.perform_async(Oj.dump(@json), replied_to_status.account_id, [@account.preferred_inbox_url])
end
def lock_options
{ redis: Redis.current, key: "create:#{@object['id']}" }
end
end