crud-object-diff/dist/helpers.js

Helper utilities to compare objects or arrays for obtaining created, updated, & deleted values.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isEqualArray = exports.isEqualObject = void 0;
/**
 * Check if two objects are equal w/ deep comparison
 * @param {Object} a
 * @param {Object} b
 * @returns {boolean}
 */
function isEqualObject(a, b) {
    if (Array.isArray(a) && Array.isArray(b))
        return isEqualArray(a, b);
    if (typeof a !== 'object' && typeof b !== 'object')
        return Object.is(a, b);
    if (checkNullAndUndefined(a, b))
        return false;
    if (checkBothNullOrUndefined(a, b))
        return true;
    var aProps = Object.getOwnPropertyNames(a);
    var bProps = Object.getOwnPropertyNames(b);
    if (aProps.length !== bProps.length)
        return false;
    var i = 0;
    while (i < aProps.length) {
        var propName = aProps[i];
        if (typeof a[propName] == 'object' && typeof b[propName] == 'object') {
            if (Array.isArray(a[propName]) && Array.isArray(b[propName])) {
                if (!isEqualArray(a[propName], b[propName]))
                    return false;
            }
            else if (!isEqualObject(a[propName], b[propName]))
                return false;
        }
        else if (bProps.indexOf(propName) == -1 ||
            !Object.is(a[propName], b[propName])) {
            return false;
        }
        i++;
    }
    return true;
}
exports.isEqualObject = isEqualObject;
function checkNullAndUndefined(a, b) {
    if (a === null && b !== null ||
        a !== null && b === null ||
        a === undefined && b !== undefined ||
        a !== undefined && b === undefined) {
        return true;
    }
    return false;
}
function checkBothNullOrUndefined(a, b) {
    if (a === null && b === null ||
        a === undefined && b === undefined) {
        return true;
    }
    return false;
}
/**
 * Check if two arrays are equal w/ deep comparison
 * @param {Array.<*>} a
 * @param {Array.<*>} b
 * @returns {boolean}
 */
function isEqualArray(a, b) {
    if (checkNullAndUndefined(a, b))
        return false;
    if (checkBothNullOrUndefined(a, b))
        return true;
    if (a.length !== b.length) {
        return false;
    }
    var i = 0;
    while (i < a.length) {
        if (typeof a[i] !== 'object' && b.indexOf(a[i]) === -1)
            return false;
        else if (typeof a[i] === 'object' &&
            !Array.isArray(a[i]) &&
            !isEqualObject(a[i], b[i]))
            return false;
        else if (Array.isArray(a[i]) &&
            Array.isArray(b[i]) &&
            !isEqualArray(a[i], b[i]))
            return false;
        i++;
    }
    return true;
}
exports.isEqualArray = isEqualArray;
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