dyaskur / google-chat-poll

export default abstract class BaseHandler {

  protected event: chatV1.Schema$DeprecatedEvent;

  constructor(event: chatV1.Schema$DeprecatedEvent) {

    this.event = event;

  }

  protected getAnnotations(): chatV1.Schema$Annotation[] {

    return this.event.message?.annotations ?? [];

  }

  protected getAnnotationByType(type: string): chatV1.Schema$Annotation | undefined {

    return this.getAnnotations().find((annotation) => annotation.type === type);

  }

  protected getUserTimezone(): LocaleTimezone {

    if (this.event.common?.timeZone?.id) {

      const locale = this.event.common.userLocale ?? 'en';

      const id = this.event.common.timeZone.id;

      const offset = this.event.common.timeZone.offset ?? 0;

      return {locale, id, offset};

    }

    return DEFAULT_LOCALE_TIMEZONE;

  }

  public abstract process(): chatV1.Schema$Message | Promise<chatV1.Schema$Message>;

}