B9PartSwitch.ModuleB9PartSwitch.FindBestSubtype C# (CSharp) Method

        private void FindBestSubtype()
        {
            // First try to identify subtype by name
            if (!string.IsNullOrEmpty(currentSubtypeName))
            {
                int index = subtypes.FindIndex(subtype => subtype.Name == currentSubtypeName);

                if (index != -1)
                {
                    currentSubtypeIndex = index;
                    return;
                }
                else
                {
                    LogError($"Cannot find subtype named '{currentSubtypeName}'");
                }
            }

            // Now try to use index
            if (subtypes.ValidIndex(currentSubtypeIndex))
            {
                currentSubtypeName = CurrentSubtype.Name;
                return;
            }

            if (ManagesResources)
            {
                // Now use resources
                // This finds all the managed resources that currently exist on teh part
                string[] resourcesOnPart = ManagedResourceNames.Intersect(part.Resources.Select(resource => resource.resourceName)).ToArray();

#if DEBUG
                LogInfo($"Managed resources found on part: [{string.Join(", ", resourcesOnPart)}]");
#endif

                // If any of the part's current resources are managed, look for a subtype which has all of the managed resources (and all of its resources exist)
                // Otherwise, look for a structural subtype (no resources)
                if (resourcesOnPart.Any())
                {
                    currentSubtypeIndex = subtypes.FindIndex(subtype => subtype.HasTank && subtype.ResourceNames.SameElementsAs(resourcesOnPart));
                    LogInfo($"Inferred subtype based on part's resources: '{CurrentSubtype.Name}'");
                }
                else
                {
                    currentSubtypeIndex = subtypes.FindIndex(subtype => !subtype.HasTank);
                }
            }
            
            // No useful way to determine correct subtype, just pick first
            if (!subtypes.ValidIndex(currentSubtypeIndex))
                currentSubtypeIndex = 0;

            currentSubtypeName = CurrentSubtype.Name;
        }