import type { EventFilters } from '../types.js';
import { CalendarDatabase } from '../db/index.js';
export declare class FeedGenerator {
    private transformer;
    private db;
    private cache;
    private readonly CACHE_TTL_MS;
    constructor(db: CalendarDatabase);
    generateFeed(filters?: EventFilters): Promise<string>;
    generateCategoryFeed(category: string): Promise<string>;
    generateTypeFeed(eventType: string): Promise<string>;
    generateUpcomingFeed(days?: number): Promise<string>;
    invalidateCache(filters?: EventFilters): void;
    getCachedETag(filters?: EventFilters): string | undefined;
    private buildCacheKey;
    private generateETag;
}
//# sourceMappingURL=FeedGenerator.d.ts.map