verdaccio-ui/src/pages/Version/is-package-version-valid.ts

import { PackageMetaInterface } from '../../../types/packageMeta';

function isPackageVersionValid(packageMeta: Partial<PackageMetaInterface>, packageVersion?: string): boolean {
  if (!packageVersion || typeof packageVersion === 'undefined') {
    // if is undefined, that means versions does not exist, we continue
    return true;
  }

  if (packageMeta.versions) {
    return Object.keys(packageMeta.versions).includes(packageVersion);
  }

  return false;
}

export default isPackageVersionValid;