@graffy/common/cjs/util.js

Common libraries that used by various Graffy modules.

"use strict";

var _interopRequireDefault = require("@babel/runtime-corejs3/helpers/interopRequireDefault");

exports.__esModule = true;
exports.throwIf = throwIf;
exports.isEmpty = isEmpty;
exports.mergeObject = mergeObject;
exports.cloneObject = cloneObject;
exports.isArgObject = isArgObject;

var _isArray = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/array/is-array"));

function throwIf(message, condition) {
  if (condition) throw Error('arg_encoding.' + message);
}

function isEmpty(object) {
  for (var _ in object) {
    return false;
  }

  return true;
}

function mergeObject(base, change) {
  if (typeof change !== 'object' || typeof base !== 'object' || !base || !change) {
    return change;
  }

  for (var prop in change) {
    if (prop in base) {
      var value = mergeObject(base[prop], change[prop]);

      if (value === null) {
        delete base[prop];
      } else {
        base[prop] = value;
      }
    } else {
      base[prop] = change[prop];
    }
  }

  return isEmpty(base) ? null : base;
}

function cloneObject(object) {
  if (typeof object !== 'object' || !object) {
    return object;
  }

  var clone = {};

  for (var prop in object) {
    var value = cloneObject(object[prop]);
    if (value === null) continue;
    clone[prop] = value;
  }

  return isEmpty(clone) ? null : clone;
}

function isArgObject(arg) {
  return typeof arg === 'object' && arg && !(0, _isArray.default)(arg);
}