79 lines
2.3 KiB
Ruby
79 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::ProcessCollectionService < BaseService
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include JsonLdHelper
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def call(body, actor, **options)
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@account = actor
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@json = original_json = Oj.load(body, mode: :strict)
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@options = options
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begin
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@json = compact(@json) if @json['signature'].is_a?(Hash)
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rescue JSON::LD::JsonLdError => e
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Rails.logger.debug "Error when compacting JSON-LD document for #{value_or_id(@json['actor'])}: #{e.message}"
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@json = original_json.without('signature')
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end
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return if !supported_context? || (different_actor? && verify_account!.nil?) || suspended_actor? || @account.local?
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return unless @account.is_a?(Account)
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if @json['signature'].present?
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# We have verified the signature, but in the compaction step above, might
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# have introduced incompatibilities with other servers that do not
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# normalize the JSON-LD documents (for instance, previous Mastodon
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# versions), so skip redistribution if we can't get a safe document.
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patch_for_forwarding!(original_json, @json)
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@json.delete('signature') unless safe_for_forwarding?(original_json, @json)
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end
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case @json['type']
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when 'Collection', 'CollectionPage'
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process_items @json['items']
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when 'OrderedCollection', 'OrderedCollectionPage'
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process_items @json['orderedItems']
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else
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process_items [@json]
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end
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rescue Oj::ParseError
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nil
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end
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private
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def different_actor?
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@json['actor'].present? && value_or_id(@json['actor']) != @account.uri
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end
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def suspended_actor?
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@account.suspended? && !activity_allowed_while_suspended?
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end
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def activity_allowed_while_suspended?
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%w(Delete Reject Undo Update).include?(@json['type'])
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end
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def process_items(items)
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items.reverse_each.filter_map { |item| process_item(item) }
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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 process_item(item)
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activity = ActivityPub::Activity.factory(item, @account, **@options)
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activity&.perform
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end
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def verify_account!
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@options[:relayed_through_actor] = @account
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@account = ActivityPub::LinkedDataSignature.new(@json).verify_actor!
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@account = nil unless @account.is_a?(Account)
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@account
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rescue JSON::LD::JsonLdError => e
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Rails.logger.debug "Could not verify LD-Signature for #{value_or_id(@json['actor'])}: #{e.message}"
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nil
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end
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end
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