graphql-resolvers/lib/pipeResolvers.js

Resolver composition library for GraphQL.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.pipeResolvers = void 0;

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

/**
 * Resolver composition based on the root argument.
 *
 * @param {[Function]} ...funcs Resolver implementations.
 * @return {Promise}.
 */
var pipeResolvers = function pipeResolvers() {
  for (var _len = arguments.length, funcs = new Array(_len), _key = 0; _key < _len; _key++) {
    funcs[_key] = arguments[_key];
  }

  return function () {
    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      args[_key2] = arguments[_key2];
    }

    return funcs.reduce(function (prevPromise, resolver) {
      return prevPromise.then(function (root) {
        return root instanceof Error ? root : resolver.apply(void 0, [root].concat((0, _toConsumableArray2["default"])(args.slice(1))));
      });
    }, Promise.resolve(args[0]));
  };
};

exports.pipeResolvers = pipeResolvers;