/**
 * NestJS Streaming Controller
 *
 * SSE streaming controller for NestJS applications.
 * Provides the /events/stream endpoint for real-time updates.
 *
 * @example
 * ```typescript
 * // Automatically included when using StreamingModule
 * @Module({
 *   imports: [StreamingModule.forRoot()],
 * })
 * export class AppModule {}
 *
 * // Or import directly for custom routing
 * @Module({
 *   controllers: [StreamingController],
 *   providers: [{ provide: STREAM_SERVER, useValue: streamServer }],
 * })
 * export class CustomStreamingModule {}
 * ```
 */
import type { Request, Response } from 'express';
import type { StreamServer } from '../../events/streaming/StreamServer';
/**
 * Injection token for StreamServer
 */
export declare const STREAM_SERVER: unique symbol;
/**
 * StreamingController - NestJS SSE endpoint controller
 *
 * Handles GET /events/stream requests using the StreamServer's NestJS adapter.
 */
export declare class StreamingController {
    private readonly streamServer;
    constructor(streamServer: StreamServer);
    /**
     * SSE streaming endpoint
     *
     * Clients connect to this endpoint to receive real-time updates.
     * Supports channel subscription via query params: ?channels=uploads,system
     *
     * @param req - NestJS/Express request
     * @param res - NestJS/Express response
     */
    stream(req: Request, res: Response): Promise<void>;
}
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