Validator

When the form is submitted, the form data is validated to conform to the given JSON schema.

interface Validator {
  isValid(
    schema: SchemaDefinition,
    rootSchema: Schema,
    formData: SchemaValue | undefined
  ): boolean;
  reset(): void;
}

interface ValidationError<E> {
  instanceId: string;
  propertyTitle: string;
  message: string;
  error: E;
}

type MaybePromise<T> = T | Promise<T>;

interface FormValidator2<E = unknown> extends Validator {
  /**
   * Full form validation
   *
   * Essentially this is the `formData is T` check, but since `T` doesn't
   * extend `SchemaValue`, we don't declare this as a type guard.
   */
  validateFormData(
    rootSchema: Schema,
    formData: SchemaValue | undefined,
    signal: AbortSignal
  ): MaybePromise<ValidationError<E>[]>;

  /**
   * Individual field validation
   */
  validateFieldData(
    field: Config,
    fieldData: SchemaValue | undefined,
    signal: AbortSignal
  ): MaybePromise<ValidationError<E>[]>;
}