mastodon/app/services/process_mentions_service.rb
ThibG 5d5c0f4f43 Twidere mention workaround (#5552)
* Work around Twidere and Tootdon bug

Tootdon and Twidere construct @user@domain handles from mentions in toots based
solely on the mention text and account URI's domain without performing any
webfinger call or retrieving account info from the Mastodon server.

As a result, when a remote user has WEB_DOMAIN ≠ LOCAL_DOMAIN, Twidere and
Tootdon will construct the mention as @user@WEB_DOMAIN. Now, this will usually
resolve to the correct account (since the recommended configuration is to have
WEB_DOMAIN perform webfinger redirections to LOCAL_DOMAIN) when processing
mentions, but won't do so when displaying them (as it does not go through the
whole account resolution at that time).

This change rewrites mentions to the resolved account, so that displaying the
mentions will work.

* Use lookbehind instead of non-capturing group in MENTION_RE

Indeed, substitutions with the previous regexp would erroneously eat any
preceding whitespace, which would lead to concatenated mentions in the
previous commit.

Note that users will “lose” up to one character space per mention for their
toots, as that regexp is also used to remove the domain-part of mentioned
users for character counting purposes, and it also erroneously removed the
preceding character if it was a space.
2017-11-07 19:08:14 +01:00

58 lines
1.8 KiB
Ruby

# frozen_string_literal: true
class ProcessMentionsService < BaseService
include StreamEntryRenderer
# Scan status for mentions and fetch remote mentioned users, create
# local mention pointers, send Salmon notifications to mentioned
# remote users
# @param [Status] status
def call(status)
return unless status.local?
status.text = status.text.gsub(Account::MENTION_RE) do |match|
begin
mentioned_account = resolve_remote_account_service.call($1)
rescue Goldfinger::Error, HTTP::Error
mentioned_account = nil
end
next match if mentioned_account.nil? || (mentioned_account.ostatus? && status.stream_entry.hidden?)
mentioned_account.mentions.where(status: status).first_or_create(status: status)
"@#{mentioned_account.acct}"
end
status.save!
status.mentions.includes(:account).each do |mention|
create_notification(status, mention)
end
end
private
def create_notification(status, mention)
mentioned_account = mention.account
if mentioned_account.local?
NotifyService.new.call(mentioned_account, mention)
elsif mentioned_account.ostatus? && !status.stream_entry.hidden?
NotificationWorker.perform_async(stream_entry_to_xml(status.stream_entry), status.account_id, mentioned_account.id)
elsif mentioned_account.activitypub?
ActivityPub::DeliveryWorker.perform_async(build_json(mention.status), mention.status.account_id, mentioned_account.inbox_url)
end
end
def build_json(status)
Oj.dump(ActivityPub::LinkedDataSignature.new(ActiveModelSerializers::SerializableResource.new(
status,
serializer: ActivityPub::ActivitySerializer,
adapter: ActivityPub::Adapter
).as_json).sign!(status.account))
end
def resolve_remote_account_service
ResolveRemoteAccountService.new
end
end