firebase-functions/lib/common/utilities/utils.js

"use strict";
// The MIT License (MIT)
//
// Copyright (c) 2017 Firebase
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
Object.defineProperty(exports, "__esModule", { value: true });
exports.applyChange = void 0;
function isObject(obj) {
    return typeof obj === "object" && !!obj;
}
/** @hidden */
function applyChange(src, dest) {
    // if not mergeable, don't merge
    if (!isObject(dest) || !isObject(src)) {
        return dest;
    }
    return merge(src, dest);
}
exports.applyChange = applyChange;
function merge(src, dest) {
    const res = {};
    const keys = new Set([...Object.keys(src), ...Object.keys(dest)]);
    for (const key of keys.values()) {
        if (key in dest) {
            if (dest[key] === null) {
                continue;
            }
            res[key] = applyChange(src[key], dest[key]);
        }
        else if (src[key] !== null) {
            res[key] = src[key];
        }
    }
    return res;
}