@data-client/normalizr/lib/buildQueryKey.js

Normalizes and denormalizes JSON according to schema for Redux and Flux applications

import { queryKey as arrayQuery } from './schemas/Array.js';
import { queryKey as objectQuery } from './schemas/Object.js';
/**
 * Build the result parameter to denormalize from schema alone.
 * Tries to compute the entity ids from params.
 */
export default function buildQueryKey(delegate) {
  return function queryKey(schema, args) {
    // schema classes
    if (canQuery(schema)) {
      return schema.queryKey(args, queryKey, delegate);
    }

    // plain case
    if (typeof schema === 'object' && schema) {
      const method = Array.isArray(schema) ? arrayQuery : objectQuery;
      return method(schema, args, queryKey, delegate);
    }

    // fallback for things like null or undefined
    return schema;
  };
}
export function canQuery(schema) {
  return !!schema && typeof schema.queryKey === 'function';
}

// this only works if entity does a lookup first to see if its entity is 'found'
export function validateQueryKey(queryKey) {
  if (queryKey === undefined) return false;
  if (queryKey && typeof queryKey === 'object' && !Array.isArray(queryKey)) {
    return Object.values(queryKey).every(validateQueryKey);
  }
  return true;
}
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