feathers-casl/src/utils/getAvailableFields.ts

Add access control with CASL to your feathers application.

import type { HookContext } from '@feathersjs/feathers'
import type { AuthorizeChannelCommonsOptions } from '../types.js'

export const getAvailableFields = (
  context: HookContext,
  options?: Partial<Pick<AuthorizeChannelCommonsOptions, 'availableFields'>>,
): undefined | string[] => {
  return !options?.availableFields
    ? undefined
    : typeof options.availableFields === 'function'
      ? options.availableFields(context)
      : options.availableFields
}