I want to dynamically update data at validation time, or modify the schema at compile to include a default on a property

[anirudhmungre]

Hi :)
I have been given an object that I want to validate as well as an object with defaults for those values if they don't exist.

const validateData = {
  name: 'foo', 
};
const dataDefaults = {
  'name-string': 'bar',
  'details-string': 'baz',
};

And I have a schema coming from a different location

const schema = {
  title: 'Files',
  type: 'object',
  properties: {
    name: {
      type: string,
      description: 'A name',
      title: 'Name',
      'other-name': 'name-string'
    },
    details: {
      type: string,
      description: 'A description of details',
      title: 'Details',
      'other-name': 'details-string'      
    },
  },
  required: ['name', 'details'],
};

Now my object will be invalid because details is required but doesn't exist. However, it does exist in dataDefaults. Is there a way that if during validation I don't find a value for a given property (example above details) that it looks for that property in dataDefaults instead? The schema comes with a custom keyword other-name defining what that property would be called within the dataDefaults object.

If I can modify the schema to add a default param on each property containing an other-name keyword and set that default value to the other name value at compile of the schema then this is solved.

I would expect my final object after validation to look like:

{
  name: 'foo',
  details: 'baz',
}