public static EventBase FromRecord()

in sources/Google.Solutions.IapDesktop.Extensions.Management/Auditing/Events/EventFactory.cs [92:136]
36 lines of code
9 McCabe index (conditional complexity)

        public static EventBase FromRecord(LogRecord record)
        {
            if (!record.IsValidAuditLogRecord)
            {
                throw new ArgumentException("Not a valid audit log record");
            }

            if (record.ProtoPayload?.MethodName != null &&
                lifecycleEvents.TryGetValue(record.ProtoPayload.MethodName, out var lcFunc))
            {
                var e = lcFunc(record);
                Debug.Assert(e.Category == EventCategory.Lifecycle);
                return e;
            }
            else if (record.ProtoPayload?.MethodName != null &&
                systemEvents.TryGetValue(record.ProtoPayload.MethodName, out var sysFunc))
            {
                var e = sysFunc(record);
                Debug.Assert(e.Category == EventCategory.System);
                return e;
            }
            else if (record.ProtoPayload?.MethodName != null &&
                accessEvents.TryGetValue(record.ProtoPayload.MethodName, out var accessFunc))
            {
                var e = accessFunc(record);
                Debug.Assert(e.Category == EventCategory.Access);
                return e;
            }
            else if (record.IsSystemEvent)
            {
                //
                // There are some less common/more esoteric system events that do not
                // have a wrapper class. Map these to GenericSystemEvent.
                //
                return new GenericSystemEvent(record);
            }
            else
            {
                //
                // The list of activity event types is incomplete any might grow stale over time,
                // so ensure to fail open.
                //
                return new UnknownEvent(record);
            }
        }