62 lines
1.8 KiB
Ruby
62 lines
1.8 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::FetchRemoteStatusService < BaseService
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include JsonLdHelper
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# Should be called when uri has already been checked for locality
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def call(uri, id: true, prefetched_body: nil, on_behalf_of: nil)
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@json = begin
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if prefetched_body.nil?
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fetch_resource(uri, id, on_behalf_of)
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else
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body_to_json(prefetched_body, compare_id: id ? uri : nil)
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end
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end
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return unless supported_context?
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actor_id = nil
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activity_json = nil
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if expected_object_type?
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actor_id = value_or_id(first_of_value(@json['attributedTo']))
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activity_json = { 'type' => 'Create', 'actor' => actor_id, 'object' => @json }
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elsif expected_activity_type?
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actor_id = value_or_id(first_of_value(@json['actor']))
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activity_json = @json
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end
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return if activity_json.nil? || !trustworthy_attribution?(@json['id'], actor_id)
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actor = ActivityPub::TagManager.instance.uri_to_resource(actor_id, Account)
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actor = ActivityPub::FetchRemoteAccountService.new.call(actor_id, id: true) if actor.nil? || needs_update?(actor)
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return if actor.nil? || actor.suspended?
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ActivityPub::Activity.factory(activity_json, actor).perform
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end
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private
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def trustworthy_attribution?(uri, attributed_to)
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return false if uri.nil? || attributed_to.nil?
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Addressable::URI.parse(uri).normalized_host.casecmp(Addressable::URI.parse(attributed_to).normalized_host).zero?
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end
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def supported_context?
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super(@json)
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end
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def expected_activity_type?
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equals_or_includes_any?(@json['type'], %w(Create Announce))
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end
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def expected_object_type?
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equals_or_includes_any?(@json['type'], ActivityPub::Activity::Create::SUPPORTED_TYPES + ActivityPub::Activity::Create::CONVERTED_TYPES)
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end
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def needs_update?(actor)
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actor.possibly_stale?
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end
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end
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