belgattitude/nextjs-monorepo-example

import { isParsableNumeric, isParsableSafeInteger } from '../typeguards';

export function stringToSafeInteger(value: unknown): number | null {
  if (!isParsableSafeInteger(value)) {
    return null;
  }
  return typeof value === 'string' ? Number.parseInt(value, 10) : value;
}

export function stringToFloat(value: unknown): number | null {
  if (
    !isParsableNumeric(
      typeof value === 'number' ? value.toString(10) : value ?? ''
    )
  ) {
    return null;
  }
  const v = Number.parseFloat(
    typeof value === 'string' ? value : (value as number).toString(10)
  );
  return Number.isNaN(v) ? null : v;
}