elastic-search: hide customProductMappings from api

[Draykee]

Is your feature request related to a problem? Please describe.
I want to map and search for some custom products properties without exposing the exact value to the public api.

Usecases:

• A hidden rank that is applied to promote some products
• A hidden product owner id (I never want to expose user ids)
• Exact product locations

Describe the solution you'd like
Extend the custom mapping type with a new field:

type CustomMappingDefinition<Args extends any[], T extends CustomMappingTypes, R> = {
    graphQlType: T;
    hidden?: boolean; // **NEW** ( should default to false )
    valueFn: (...args: Args) => R;
}

And inside the generateCustomMappingTypes function a filter could just be applied like this:

const productMappings = Object.entries(options.customProductMappings || {}).filter(([, value]) => !value.hidden);

Describe alternatives you've considered
I couldn't come up with an alternative that doesn't produce a huge overhead.

[michaelbromley]

This is a good point and can be added to the next minor release. Only thing I'd suggest is to change it from hidden: true to public: false to align with the existing custom fields API.

[Draykee]

@michaelbromley I guess this issue can be closed :)

[michaelbromley]

Yes!