DggMDwcLDgIEBQEABAMDCw

DggMDwcLDgIEBQEABAMDCw.js

'use strict';

/**
 * Deep object flattener
 * flatten an object, the message will be pull out, array index/nested key will be chained to be a new key.
 * @param {object} obj - the target object
 * @param {string} [prefix = ''] - the prefix of each key
 * @return {object} flattened object
 */
function deepFlatten(obj, prefix = '') {
	const result_obj = Object.create(null);
	Object.keys(obj).forEach(key => {
		const val = obj[key];
		if (val.message) {
			result_obj[prefix + key] = val.message;
		} else if (!Array.isArray(val)) {
			// pull out the nested layer
			Object.assign(result_obj, deepFlatten(val, `${key}.`));
		} else {
			val.forEach((nested_val, index) => {
				// pull out the nested layer
				Object.assign(result_obj, deepFlatten(nested_val, `${key}[${index}].`));
			});
		}
	});
	return result_obj;
}