import { IObjectManager } from './IObjectManager';
import { SessionContext } from '../SessionContext';
import { ParentDirectoryDTO } from '../../../common/entities/DirectoryDTO';
/**
 * Base class for managers that handle projection-aware caching.
 * Provides common functionality for managers that need to cache data
 * per user projection (like AlbumManager and PersonManager).
 */
export declare abstract class ProjectionAwareManager<T> implements IObjectManager {
    protected cache: Record<string, T[]>;
    /**
     * Get all entities for the given session. Subclasses should implement
     * the actual loading logic in loadEntities().
     */
    getAll(session: SessionContext): Promise<T[]>;
    invalidateCache(changedDir?: ParentDirectoryDTO): Promise<void>;
    /**
     * Default implementation of onNewDataVersion that invalidates cache.
     * Subclasses can override for more specific behavior.
     */
    onNewDataVersion(changedDir?: ParentDirectoryDTO): Promise<void>;
    /**
     * Reset the entire memory cache
     */
    protected resetMemoryCache(): void;
    /**
     * Abstract method that subclasses must implement to load entities
     * from the database with proper projection awareness
     */
    protected abstract loadEntities(session: SessionContext): Promise<T[]>;
    /**
     * Abstract method that subclasses must implement to invalidate
     * projection-aware cache entries in the database
     */
    protected abstract invalidateDBCache(changedDir?: ParentDirectoryDTO): Promise<void>;
    /**
     * Get cached entities for the given session projection
     */
    private getCachedEntities;
    /**
     * Set cached entities for the given session projection
     */
    private setCachedEntities;
}