hometown/app/services/activitypub/fetch_remote_status_service.rb
Eugen Rochko 1b5806b744 Define missing JSON-LD properties (#4767)
Using _: property names is discouraged, as in the future,
canonicalization may throw an error when encountering that instead
of discarding it silently like it does now.

We are defining some ActivityStreams properties which we expect
to land in ActivityStreams eventually, to ensure that future versions
of Mastodon will remain compatible with this even once that happens.
Those would be `locked`, `sensitive` and `Hashtag`

We are defining a custom context inline for some properties which we
do not expect to land in any other context. `atomUri`, `inReplyToAtomUri`
and `conversation` are part of the custom defined OStatus context.
2017-09-02 14:01:23 +02:00

49 lines
1.2 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::FetchRemoteStatusService < BaseService
include JsonLdHelper
# Should be called when uri has already been checked for locality
def call(uri, prefetched_json = nil)
@json = body_to_json(prefetched_json) || fetch_resource(uri)
return unless supported_context?
activity = activity_json
actor_id = value_or_id(activity['actor'])
return unless expected_type?(activity) && trustworthy_attribution?(uri, actor_id)
actor = ActivityPub::TagManager.instance.uri_to_resource(actor_id, Account)
actor = ActivityPub::FetchRemoteAccountService.new.call(actor_id) if actor.nil?
ActivityPub::Activity.factory(activity, actor).perform
end
private
def activity_json
if %w(Note Article).include? @json['type']
{
'type' => 'Create',
'actor' => first_of_value(@json['attributedTo']),
'object' => @json,
}
else
@json
end
end
def trustworthy_attribution?(uri, attributed_to)
Addressable::URI.parse(uri).normalized_host.casecmp(Addressable::URI.parse(attributed_to).normalized_host).zero?
end
def supported_context?
super(@json)
end
def expected_type?(json)
%w(Create Announce).include? json['type']
end
end