bbo/es/is_shallow_equal.js

bbo is a utility library of zero dependencies for javascript.

import isObject from './is_object.js';
import './get_tag.js';
import isArray from './is_array.js';
import isDate from './is_date.js';

/* eslint-disable guard-for-in */
function isShallowEqual() {
  for (var _len = arguments.length, objs = new Array(_len), _key = 0; _key < _len; _key++) {
    objs[_key] = arguments[_key];
  }

  if (objs.length < 2) return false;

  for (var i in objs) {
    i = Number(i);

    if (objs[i + 1] !== undefined) {
      if (isArray(objs[i])) {
        if (!compareArrays(objs[i], objs[i + 1])) {
          return false;
        }
      } else if (isObject(objs[i])) {
        if (!compareObjects(objs[i], objs[i + 1])) {
          return false;
        }
      } else if (isDate(objs[i])) {
        if (!compareDates(objs[i], objs[i + 1])) {
          return false;
        }
      } else {
        if (objs[i] !== objs[i + 1]) {
          return false;
        }
      }
    }
  }

  return true;
}

function compare(obj, obj1) {
  for (var i in obj) {
    if (obj1[i] === undefined) {
      return false;
    }

    if (isArray(obj[i])) {
      if (!compareArrays(obj[i], obj1[i])) {
        return false;
      }
    } else if (isObject(obj[i])) {
      if (!compareObjects(obj[i], obj1[i])) {
        return false;
      }
    } else if (isDate(obj[i])) {
      if (!compareDates(obj[i], obj1[i])) {
        return false;
      }
    } else {
      if (obj[i] !== obj1[i]) {
        return false;
      }
    }
  }

  return true;
}

function compareArrays(obj, obj1) {
  if (!isArray(obj1)) return false;
  if (obj.length !== obj1.length) return false;
  var equal = compare(obj, obj1);
  return equal;
}

function compareObjects(obj, obj1) {
  if (!isObject(obj1)) return false;

  for (var key in obj1) {
    if (obj[key] === undefined) {
      return false;
    }
  }

  var equal = compare(obj, obj1);
  return equal;
}

function compareDates(obj, obj1) {
  if (!isDate(obj1) || obj.getTime() !== obj1.getTime()) {
    return false;
  }

  return true;
}

export default isShallowEqual;