mirror of
https://github.com/whippyshou/mastodon
synced 2024-12-05 10:18:39 +09:00
dad339da6d
Reject those from accounts with no local followers, from relays that are not enabled, which do not address local accounts and are not replies to accounts that do have local followers
379 lines
11 KiB
Ruby
379 lines
11 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::Activity::Create < ActivityPub::Activity
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def perform
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return if unsupported_object_type? || invalid_origin?(@object['id']) || Tombstone.exists?(uri: @object['id']) || !related_to_local_activity?
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RedisLock.acquire(lock_options) do |lock|
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if lock.acquired?
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return if delete_arrived_first?(object_uri)
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@status = find_existing_status
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if @status.nil?
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process_status
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elsif @options[:delivered_to_account_id].present?
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postprocess_audience_and_deliver
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end
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else
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raise Mastodon::RaceConditionError
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end
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end
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@status
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end
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private
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def process_status
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@tags = []
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@mentions = []
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@params = {}
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process_status_params
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process_tags
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process_audience
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ApplicationRecord.transaction do
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@status = Status.create!(@params)
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attach_tags(@status)
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end
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resolve_thread(@status)
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distribute(@status)
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forward_for_reply if @status.public_visibility? || @status.unlisted_visibility?
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end
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def find_existing_status
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status = status_from_uri(object_uri)
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status ||= Status.find_by(uri: @object['atomUri']) if @object['atomUri'].present?
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status
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end
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def process_status_params
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@params = begin
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{
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uri: @object['id'],
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url: object_url || @object['id'],
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account: @account,
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text: text_from_content || '',
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language: detected_language,
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spoiler_text: converted_object_type? ? '' : (text_from_summary || ''),
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created_at: @object['published'],
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override_timestamps: @options[:override_timestamps],
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reply: @object['inReplyTo'].present?,
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sensitive: @object['sensitive'] || false,
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visibility: visibility_from_audience,
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thread: replied_to_status,
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conversation: conversation_from_uri(@object['conversation']),
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media_attachment_ids: process_attachments.take(4).map(&:id),
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}
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end
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end
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def process_audience
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(as_array(@object['to']) + as_array(@object['cc'])).uniq.each do |audience|
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next if audience == ActivityPub::TagManager::COLLECTIONS[:public]
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# Unlike with tags, there is no point in resolving accounts we don't already
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# know here, because silent mentions would only be used for local access
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# control anyway
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account = account_from_uri(audience)
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next if account.nil? || @mentions.any? { |mention| mention.account_id == account.id }
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@mentions << Mention.new(account: account, silent: true)
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# If there is at least one silent mention, then the status can be considered
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# as a limited-audience status, and not strictly a direct message, but only
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# if we considered a direct message in the first place
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next unless @params[:visibility] == :direct
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@params[:visibility] = :limited
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end
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# If the payload was delivered to a specific inbox, the inbox owner must have
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# access to it, unless they already have access to it anyway
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return if @options[:delivered_to_account_id].nil? || @mentions.any? { |mention| mention.account_id == @options[:delivered_to_account_id] }
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@mentions << Mention.new(account_id: @options[:delivered_to_account_id], silent: true)
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return unless @params[:visibility] == :direct
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@params[:visibility] = :limited
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end
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def postprocess_audience_and_deliver
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return if @status.mentions.find_by(account_id: @options[:delivered_to_account_id])
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delivered_to_account = Account.find(@options[:delivered_to_account_id])
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@status.mentions.create(account: delivered_to_account, silent: true)
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@status.update(visibility: :limited) if @status.direct_visibility?
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return unless delivered_to_account.following?(@account)
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FeedInsertWorker.perform_async(@status.id, delivered_to_account.id, :home)
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end
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def attach_tags(status)
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@tags.each do |tag|
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status.tags << tag
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TrendingTags.record_use!(tag, status.account, status.created_at) if status.public_visibility?
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end
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@mentions.each do |mention|
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mention.status = status
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mention.save
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end
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end
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def process_tags
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return if @object['tag'].nil?
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as_array(@object['tag']).each do |tag|
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if equals_or_includes?(tag['type'], 'Hashtag')
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process_hashtag tag
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elsif equals_or_includes?(tag['type'], 'Mention')
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process_mention tag
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elsif equals_or_includes?(tag['type'], 'Emoji')
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process_emoji tag
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end
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end
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end
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def process_hashtag(tag)
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return if tag['name'].blank?
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hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
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hashtag = Tag.where(name: hashtag).first_or_create!(name: hashtag)
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return if @tags.include?(hashtag)
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@tags << hashtag
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rescue ActiveRecord::RecordInvalid
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nil
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end
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def process_mention(tag)
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return if tag['href'].blank?
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account = account_from_uri(tag['href'])
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account = ::FetchRemoteAccountService.new.call(tag['href'], id: false) if account.nil?
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return if account.nil?
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@mentions << Mention.new(account: account, silent: false)
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end
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def process_emoji(tag)
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return if skip_download?
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return if tag['name'].blank? || tag['icon'].blank? || tag['icon']['url'].blank?
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shortcode = tag['name'].delete(':')
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image_url = tag['icon']['url']
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uri = tag['id']
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updated = tag['updated']
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emoji = CustomEmoji.find_by(shortcode: shortcode, domain: @account.domain)
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return unless emoji.nil? || image_url != emoji.image_remote_url || (updated && updated >= emoji.updated_at)
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emoji ||= CustomEmoji.new(domain: @account.domain, shortcode: shortcode, uri: uri)
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emoji.image_remote_url = image_url
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emoji.save
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end
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def process_attachments
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return [] if @object['attachment'].nil?
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media_attachments = []
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as_array(@object['attachment']).each do |attachment|
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next if attachment['url'].blank?
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href = Addressable::URI.parse(attachment['url']).normalize.to_s
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media_attachment = MediaAttachment.create(account: @account, remote_url: href, description: attachment['name'].presence, focus: attachment['focalPoint'])
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media_attachments << media_attachment
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next if unsupported_media_type?(attachment['mediaType']) || skip_download?
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media_attachment.file_remote_url = href
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media_attachment.save
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end
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media_attachments
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rescue Addressable::URI::InvalidURIError => e
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Rails.logger.debug e
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media_attachments
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end
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def resolve_thread(status)
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return unless status.reply? && status.thread.nil? && Request.valid_url?(in_reply_to_uri)
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ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)
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end
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def conversation_from_uri(uri)
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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)
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Conversation.find_by(uri: uri) || Conversation.create(uri: uri)
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end
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def visibility_from_audience
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if equals_or_includes?(@object['to'], ActivityPub::TagManager::COLLECTIONS[:public])
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:public
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elsif equals_or_includes?(@object['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
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:unlisted
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elsif equals_or_includes?(@object['to'], @account.followers_url)
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:private
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else
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:direct
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end
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end
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def audience_includes?(account)
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uri = ActivityPub::TagManager.instance.uri_for(account)
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equals_or_includes?(@object['to'], uri) || equals_or_includes?(@object['cc'], uri)
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end
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def replied_to_status
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return @replied_to_status if defined?(@replied_to_status)
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if in_reply_to_uri.blank?
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@replied_to_status = nil
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else
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@replied_to_status = status_from_uri(in_reply_to_uri)
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@replied_to_status ||= status_from_uri(@object['inReplyToAtomUri']) if @object['inReplyToAtomUri'].present?
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@replied_to_status
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end
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end
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def in_reply_to_uri
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value_or_id(@object['inReplyTo'])
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end
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def text_from_content
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return Formatter.instance.linkify([[text_from_name, text_from_summary.presence].compact.join("\n\n"), object_url || @object['id']].join(' ')) if converted_object_type?
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if @object['content'].present?
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@object['content']
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elsif content_language_map?
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@object['contentMap'].values.first
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end
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end
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def text_from_summary
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if @object['summary'].present?
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@object['summary']
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elsif summary_language_map?
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@object['summaryMap'].values.first
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end
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end
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def text_from_name
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if @object['name'].present?
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@object['name']
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elsif name_language_map?
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@object['nameMap'].values.first
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end
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end
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def detected_language
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if content_language_map?
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@object['contentMap'].keys.first
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elsif name_language_map?
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@object['nameMap'].keys.first
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elsif summary_language_map?
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@object['summaryMap'].keys.first
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elsif supported_object_type?
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LanguageDetector.instance.detect(text_from_content, @account)
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end
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end
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def object_url
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return if @object['url'].blank?
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url_candidate = url_to_href(@object['url'], 'text/html')
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if invalid_origin?(url_candidate)
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nil
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else
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url_candidate
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end
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end
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def summary_language_map?
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@object['summaryMap'].is_a?(Hash) && !@object['summaryMap'].empty?
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end
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def content_language_map?
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@object['contentMap'].is_a?(Hash) && !@object['contentMap'].empty?
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end
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def name_language_map?
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@object['nameMap'].is_a?(Hash) && !@object['nameMap'].empty?
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end
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def unsupported_media_type?(mime_type)
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mime_type.present? && !(MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES).include?(mime_type)
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end
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def skip_download?
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return @skip_download if defined?(@skip_download)
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@skip_download ||= DomainBlock.find_by(domain: @account.domain)&.reject_media?
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end
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def invalid_origin?(url)
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return true if unsupported_uri_scheme?(url)
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needle = Addressable::URI.parse(url).host
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haystack = Addressable::URI.parse(@account.uri).host
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!haystack.casecmp(needle).zero?
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end
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def reply_to_local?
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!replied_to_status.nil? && replied_to_status.account.local?
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end
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def related_to_local_activity?
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fetch? || followed_by_local_accounts? || requested_through_relay? ||
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responds_to_followed_account? || addresses_local_accounts?
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end
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def fetch?
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!@options[:delivery]
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end
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def followed_by_local_accounts?
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@account.passive_relationships.exists?
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end
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def requested_through_relay?
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@options[:relayed_through_account] && Relay.find_by(inbox_url: @options[:relayed_through_account].inbox_url)&.enabled?
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end
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def responds_to_followed_account?
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!replied_to_status.nil? && (replied_to_status.account.local? || replied_to_status.account.passive_relationships.exists?)
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end
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def addresses_local_accounts?
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return true if @options[:delivered_to_account_id]
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local_usernames = (as_array(@object['to']) + as_array(@object['cc'])).uniq.select { |uri| ActivityPub::TagManager.instance.local_uri?(uri) }.map { |uri| ActivityPub::TagManager.instance.uri_to_local_id(uri, :username) }
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return false if local_usernames.empty?
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Account.local.where(username: local_usernames).exists?
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end
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def forward_for_reply
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return unless @json['signature'].present? && reply_to_local?
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ActivityPub::RawDistributionWorker.perform_async(Oj.dump(@json), replied_to_status.account_id, [@account.preferred_inbox_url])
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end
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def lock_options
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{ redis: Redis.current, key: "create:#{@object['id']}" }
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end
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end
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