Zod FormData Helper

parse_formdata.ts

import { z } from "zod";

type ParsedFormData<T extends z.AnyZodObject> = {
  data: null;
  errors: z.typeToFlattenedError<z.infer<T>>['fieldErrors']
} | {
  data: z.infer<T>;
  errors: null;
}

export async function parseFormData<
  Schema extends z.AnyZodObject
>(schema: Schema, request: Request,): Promise<ParsedFormData<Schema>> {
  const formdata = await request.formData();
  const obj = Object.fromEntries(formdata);
  const result = await schema.safeParseAsync(obj);
  return result.success
    ? { data: result.data, errors: null }
    : { data: null, errors: result.error.flatten().fieldErrors };
}