@onesy/utils/merge.js

Utils

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const is_1 = __importDefault(require("./is"));
const copy_1 = __importDefault(require("./copy"));
const optionsDefault = {
    copy: false,
    merge: {
        array: false,
    },
};
const merge = (target, source, options_ = {}) => {
    const options = Object.assign(Object.assign({}, optionsDefault), options_);
    if (options.merge.array &&
        (0, is_1.default)('array', target) && (0, is_1.default)('array', source)) {
        const length = Math.max(target.length, source.length);
        for (let i = 0; i < length; i++) {
            if (target[i] === undefined)
                target[i] = source[i];
            if (((0, is_1.default)('object', target[i]) && (0, is_1.default)('object', source[i])) ||
                (0, is_1.default)('array', target[i]) && (0, is_1.default)('array', source[i]))
                target[i] = merge(target[i], source[i], options);
        }
    }
    if ((0, is_1.default)('object', target) && (0, is_1.default)('object', source)) {
        Object.keys(source).forEach(key => {
            // We only care about direct target object properties
            // not about inherited properties from a prototype chain
            if (target.hasOwnProperty(key)) {
                if ((0, is_1.default)('object', target[key]) && (0, is_1.default)('object', source[key]))
                    target[key] = merge(target[key], source[key], options);
            }
            else
                target[key] = options.copy ? (0, copy_1.default)(source[key]) : source[key];
        });
    }
    return target;
};
exports.default = merge;