golos-lib-js/lib/promisify.js

Golos-js the JavaScript library with API for GOLOS blockchain

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.nodeify = nodeify;
exports.promisify = promisify;
exports.promisifyAll = promisifyAll;
class PromiseError {
  constructor(error) {
    this.cause = error;
    this.message = error.message;
    this.name = error.name || 'Error';
    if (error.payload) this.payload = error.payload;
    this.stack = error.stack;
  }
}
function promisify(fn) {
  return function () {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }
    return new Promise((resolve, reject) => {
      fn.call(this, ...args, (err, res) => {
        if (err) reject(err);else resolve(res);
      });
    });
  };
}
function promisifyAll(obj) {
  let suffix = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'Async';
  let keys = Object.getOwnPropertyNames(obj);
  let ret = new Set();
  for (let key of keys) {
    if (key === 'constructor') continue;
    var desc = Object.getOwnPropertyDescriptor(obj, key);
    if (desc != null && desc.get == null && desc.set == null) {
      ret.add(key);
    }
  }
  for (let key of ret) {
    obj[key + suffix] = promisify(obj[key]);
  }
}
function nodeify(promise, callback) {
  const isCallback = typeof callback === 'function';
  return promise.then(res => {
    if (isCallback) callback(null, res);
    return res;
  }).catch(err => {
    if (isCallback) callback(err, null);else throw err;
  });
}