/** Determines whether a `thing` is an object for the purposes of RJSF. In this case, `thing` is an object if it has
 * the type `object` but is NOT null, an array or a File.
 *
 * @param thing - The thing to check to see whether it is an object
 * @returns - True if it is a non-null, non-array, non-File object
 */
export default function isObject(thing: any) {
  if (typeof thing !== 'object' || thing === null) {
    return false;
  }
  // lastModified is guaranteed to be a number on a File instance
  // as per https://w3c.github.io/FileAPI/#dfn-lastModified
  if (typeof thing.lastModified === 'number' && typeof File !== 'undefined' && thing instanceof File) {
    return false;
  }
  // getMonth is guaranteed to be a method on a Date instance
  // as per https://tc39.es/ecma262/multipage/numbers-and-dates.html#sec-date.prototype.getmonth
  if (typeof thing.getMonth === 'function' && typeof Date !== 'undefined' && thing instanceof Date) {
    return false;
  }
  return !Array.isArray(thing);
}