dynamoose/dist/utils/combine_objects.js

Dynamoose is a modeling tool for Amazon's DynamoDB (inspired by Mongoose)

"use strict";
// This function is meant to combine objects for providing default options. Values will be overwritten as opposed to merged.
const main = (...args) => {
    let returnObject;
    args.forEach((arg, index) => {
        if (typeof arg !== "object") {
            throw new Error("You can only pass objects into combine_objects method.");
        }
        if (index === 0) {
            returnObject = arg;
        }
        else {
            if (Array.isArray(returnObject) !== Array.isArray(arg)) {
                throw new Error("You can't mix value types for the combine_objects method.");
            }
            if (Array.isArray(arg)) {
                returnObject = [...returnObject, ...arg];
            }
            else {
                Object.keys(arg).forEach((key) => {
                    if (typeof returnObject[key] === "object" && typeof arg[key] === "object" && returnObject[key] !== null) {
                        returnObject[key] = main(returnObject[key], arg[key]);
                    }
                    else if (!Object.prototype.hasOwnProperty.call(returnObject, key)) {
                        returnObject[key] = arg[key];
                    }
                });
            }
        }
    });
    return returnObject;
};
module.exports = main;