import { Copyright as CopyrightData } from '../../../types';

export default class Copyright {
  private author: string;

  private year?: number;

  private license?: string;

  /**
   * @param author - Owner of licence
   * @param year - Year of licence
   * @param license - Type of licence
   * @see http://www.topografix.com/gpx/1/1/#type_copyrightType
   */
  public constructor(
    author: string,
    {
      year,
      license,
    }: {
      license?: string;
      year?: number;
    },
  ) {
    this.author = author;
    this.year = year;
    this.license = license;
  }

  public toObject(): CopyrightData {
    const { author, year, license } = this;

    return {
      attributes: { author },
      ...(typeof year === 'number' ? { year } : {}),
      ...(license ? { license } : {}),
    };
  }
}