const MAX_DOCUMENT_BYTES = 10 * 1024 * 1024;
const ALLOWED_DOCUMENT_TYPES = new Set(["application/pdf", "image/jpeg", "image/png"]);

export function validateVendorDocument(file: File): string | undefined {
  if (!ALLOWED_DOCUMENT_TYPES.has(file.type)) {
    return "Only PDF, JPG, and PNG files are allowed.";
  }

  if (file.size > MAX_DOCUMENT_BYTES) {
    return "Files must be 10 MB or smaller.";
  }
}