feat(next): Custom user defined validations

[SimoneErba]

Allow users to write their custom functions to use in jsonLogic. We register them once when we create the form. Added customJsonLogicOps to the ValidationOptions that is a dictionary of name: function

I added the test in the v0 file because the new one doesn't use createHeadlessForm and mocks the jsonLogic

[lukad]

Hi @SimoneErba! Thanks for your PR and first of all, sorry for the long delay in getting back to you.

I'd like to accept your PR, but we need to make some adjustments. Unfortunately json-logic has no concept of scopes, instances or similar which means it would be possible for multiple uses of createHeadlessForm to add conflicting custom operators. This could happen in a SPA rendering many different forms.

My proposal here is that we only add the custom ops before validation via add_operation and then remove them afterwards via rm_operation. This should prevent possible conflicts and keep the global json-logic state clean.

[SimoneErba]

Hi @lukad, thanks for your review! It makes sense, I changed the code to add and remove the functions everytime we run the validation

[antoniocapelo]

Hi @SimoneErba , there's a small issue with one of the lint jobs, if you can take a look we can move this to the finish line 🙂

[SimoneErba]

Hi @antoniocapelo, can you run the CI again to see if it's all good now? Thanks

[antoniocapelo]

Suggestion

Moving this block to a validateCustomJsonLogicOps function would make things easier to read 🙂

[SimoneErba]

@antoniocapelo There was a validateOptions function, I moved it there

[antoniocapelo]

Suggestion

Similar approach in the other comment, we could have 2 functions:

function addCustomJsonLogicOperations(ops) {
  if (ops) {
          for (const [name, func] of Object.entries(customJsonLogicOps)) {
          jsonLogic.add_operation(name, func)
        }
  }
}

// similar one for removing

So this handleValidation would look like:

const customJsonLogicOps = options?.validationOptions?.customJsonLogicOps

    try {
     addJsonLogicCustomOperations(customJsonLogicOps)

      const updatedSchema = calculateFinalSchema({
        schema,
        values: value,
        options: options.validationOptions,
      })

      const result = validate(value, updatedSchema, options.validationOptions)

      updateFieldProperties(fields, updatedSchema, schema)

      return result
    }
    finally {
     removeJsonLogicCustomOperations(customJsonLogicOps)
    }

[SimoneErba]

@antoniocapelo done