export class StringHelper {
  public static toSlug(str: string | null): string | null {
    if (!str) {
      return str;
    }

    return str
      .trim()
      .toLowerCase()
      .replace(/\s+/g, '-')
      .replace(/[^\w\-]+/g, '')
      .replace(/\-\-+/g, '-')
      .replace(/^-+/, '')
      .replace(/-+$/, '');
  }

  public static toTitlecase(str: string | null): string | null {
    if (!str) {
      return str;
    }

    return str.replace(
      /\w\S*/g,
      (substring: string) =>
        substring.charAt(0).toUpperCase() + substring.substring(1).toLowerCase()
    );
  }
}