opsgenie-sdk-revived/lib/utils.js

Reviving the opsgenie-sdk, Giving Node.js access to the OpsGenie Web API

const { isArray } = Array;
const hasOwn = Object.prototype.hasOwnProperty;

/**
 * Recursively copies given object into a new object. Helper method for merge
 */
function clone(v) {
  if (v === null || typeof v !== 'object') {
    return v;
  }

  if (isArray(v)) {
    const arr = v.slice();
    for (let i = 0; i < v.length; i++) {
      arr[i] = clone(arr[i]);
    }
    return arr;
  }

  const obj = {};
  for (const k in v) {
    obj[k] = clone(v[k]);
  }
  return obj;
}

/**
 * Merges two Objects recursively, setting property of obj1 to those of obj2
 * and creating property as necessary.
 */
// eslint-disable-next-line no-unused-vars
const merge = (exports.merge = function merge(obj1, obj2, appendOnly) {
  if (obj1 === null || typeof obj1 !== 'object') {
    throw new TypeError(`merge() - first parameter has to be an object, not ${typeof obj1}.`);
  }

  if (obj2 === null || typeof obj2 !== 'object') {
    throw new TypeError(`merge() - first parameter has to be an object, not ${typeof obj2}.`);
  }

  if (isArray(obj1) || isArray(obj2)) {
    throw new TypeError('merge() - Unsupported for arrays.');
  }

  for (const k in obj2) {
    var obj1Val;
    const obj2Val = obj2[k];
    if (hasOwn.call(obj1, k)) {
      if (!appendOnly) {
        obj1Val = obj1[k];
        if (obj1Val !== null && typeof obj1Val === 'object' && obj2Val !== null && typeof obj2Val === 'object') {
          merge(obj1Val, obj2Val);
        } else {
          obj1[k] = clone(obj2Val);
        }
      }
    } else {
      obj1[k] = clone(obj2Val);
    }
  }
  return obj1;
});