export default class SearchState {
  protected cachedSearches: Set<string>;
  protected value: string = '';

  constructor(cachedSearches: string[] = []) {
    this.cachedSearches = new Set(cachedSearches);
  }

  /**
   * If we are displaying the full results of a search (not just a preview),
   * this value should return the query that prompted that search.
   *
   * In this generic class, full page searching is not supported.
   * This method should be implemented by subclasses that do support it.
   *
   * @see Search
   */
  getInitialSearch(): string {
    return '';
  }

  getValue(): string {
    return this.value;
  }

  setValue(value: string) {
    this.value = value;
  }

  /**
   * Clear the search value.
   */
  clear() {
    this.setValue('');
  }

  /**
   * Mark that we have already searched for this query so that we don't
   * have to ping the endpoint again.
   */
  cache(query: string) {
    this.cachedSearches.add(query);
  }

  /**
   * Check if this query has been searched before.
   */
  isCached(query: string): boolean {
    return this.cachedSearches.has(query);
  }
}