ember-changeset-validations/addon/utils/handle-multiple-validations.js

Validations for ember-changeset

import { A as emberArray } from '@ember/array';
import { all } from 'rsvp';
import { typeOf } from '@ember/utils';
import { isPromise } from 'validated-changeset';

/**
 * Rejects `true` values from an array of validations. Returns `true` when there
 * are no errors, or the error object if there are errors.
 *
 * @private
 * @param  {Array} validations
 * @return {Boolean|Any}
 */
function handleValidations(validations = []) {
  let rejectedValidations = emberArray(validations).reject(
    (validation) => typeOf(validation) === 'boolean' && validation,
  );

  return rejectedValidations.length === 0 || rejectedValidations;
}

/**
 * Handles an array of validators and returns Promise.all if any value is a
 * Promise.
 *
 * @public
 * @param  {Array} validators Array of validator functions
 * @param  {String} options.key
 * @param  {Any} options.newValue
 * @param  {Any} options.oldValue
 * @param  {Object} options.changes
 * @param  {Object} options.content
 * @return {Promise|Boolean|Any}
 */
export default function handleMultipleValidations(
  validators,
  { key, newValue, oldValue, changes, content },
) {
  let validations = emberArray(
    validators.map((validator) =>
      validator(key, newValue, oldValue, changes, content),
    ),
  );

  if (emberArray(validations).any(isPromise)) {
    return all(validations).then(handleValidations);
  }

  return handleValidations(validations);
}