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# frozen_string_literal: true
class ActivityPub::ProcessCollectionService < BaseService
include JsonLdHelper
def call(body, account, **options)
@account = account
@json = Oj.load(body, mode: :strict)
@options = options
return if !supported_context? || (different_actor? && verify_account!.nil?) || suspended_actor? || @account.local?
case @json['type']
when 'Collection', 'CollectionPage'
process_items @json['items']
when 'OrderedCollection', 'OrderedCollectionPage'
process_items @json['orderedItems']
else
process_items [@json]
end
rescue Oj::ParseError
nil
end
private
def different_actor?
@json['actor'].present? && value_or_id(@json['actor']) != @account.uri
end
def suspended_actor?
@account.suspended? && !activity_allowed_while_suspended?
end
def activity_allowed_while_suspended?
%w(Delete Reject Undo Update).include?(@json['type'])
end
def process_items(items)
items.reverse_each.filter_map { |item| process_item(item) }
end
def supported_context?
super(@json)
end
def process_item(item)
activity = ActivityPub::Activity.factory(item, @account, **@options)
activity&.perform
end
def verify_account!
@options[:relayed_through_account] = @account
@account = ActivityPub::LinkedDataSignature.new(@json).verify_account!
rescue JSON::LD::JsonLdError => e
Rails.logger.debug "Could not verify LD-Signature for #{value_or_id(@json['actor'])}: #{e.message}"
nil
end
end
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