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46 lines
2.0 KiB
46 lines
2.0 KiB
13 years ago
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# Validates Zone objects
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#
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# @author Kim Nørgaard <jasen@jasen.dk>
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class ZoneValidator < ActiveModel::Validator
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def validate(record)
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record.errors.add(:mname, options[:message] || :mname) if mname_is_zone_name?(record)
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record.errors.add(:base, options[:message] || :missing_ns_record) unless has_two_ns_rr?(record)
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record.errors.add(:mname, options[:message] || :not_a_defined_nameserver) unless mname_is_a_defined_nameserver?(record)
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record.errors.add(:base, options[:message] || :duplicate_nameservers_found) unless nameservers_are_unique?(record)
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end
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private
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# Check if the zone name equals the primary nameserver
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# @param [Zone] record The Zone to check
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# @return [Boolean] True if zone name and primary nameserver are identical
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def mname_is_zone_name?(zone)
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zone.name == zone.mname
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end
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# Check if the zone has at least two associated NS resource records
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# @param [Zone] zone The Zone to check
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# @return [Boolean] True if the zone has at least two associated NS resource records
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def has_two_ns_rr?(zone)
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zone.ns_resource_records.length >= 2
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end
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# Check if the primary nameserver of the zone is defined as one of the
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# associated NS resource records
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# @param [Zone] zone The Zone to check
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# @return [Boolean] True if the primary nameserver is defined as one of the
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# associated NS resource records
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def mname_is_a_defined_nameserver?(zone)
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unless zone.mname.blank?
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nameservers = zone.ns_resource_records.map(&:rdata)
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nameservers.select {|value| value.downcase == zone.mname.downcase}.size > 0
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end
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end
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# Check if the NS resource records of the zone are unique
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# @param [Zone] zone The Zone to check
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# @return [Boolean] True if the Zone has unique NS resource records associated
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def nameservers_are_unique?(zone)
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nameserver_data_fields = zone.ns_resource_records.map(&:rdata)
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nameserver_data_fields.inject({}) {|h,v| h[v]=h[v].to_i+1; h}.reject{|k,v| v==1}.keys.empty?
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end
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end
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