Pass data and extra options to all functions in a schema

[ianmcdaniel]

I want to build links for a resource using the request object from express, but the links option in schemas does not get passed options like topLevelLinks does.

Seems like any function in a schema should get passed both data and options, like this:

const Serializer = new JSONAPISerializer();

Serializer.register('message', {
  whitelist: ['body','created_at'],

  // currently only accepts an options argument :(
  topLevelLinks: function(data, options) {
    let lastRecordId = data[data.length-1].id;
    return {
      next: `${options.req.get('host')}${options.req.baseUrl}/messages?older_than=${lastRecordId}`
    }
  },

  // currently only accepts a data argument :(
  links: function(data, options){
    return {
      self: `${options.req.get('host')}${options.req.baseUrl}/messages`
    }
  }
});

let messages = serializer.serialize('message', results, {req});

Perhaps even the entire schema could be a function

Serializer.register('message', function(data, options) {
  return {
    ...
  }
});

[mattiloh]

Pretty neat addition to this module! Thanks @danivek!