unleash-server/dist/lib/middleware/conditional-middleware.d.ts

Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.

import type { RequestHandler } from 'express';
import type { IFlagResolver, IFlagKey } from '../types/index.js';
/**
 * @deprecated Use `requireFeatureEnabled` for feature-flag route gating.
 *
 * Generic conditional middleware runner.
 * Prefer this only for non-feature-flag conditions.
 */
export declare const conditionalMiddleware: (condition: () => boolean, middleware: RequestHandler) => RequestHandler;
/**
 * Route-level feature gate middleware.
 *
 * Recommended usage:
 * `middleware: [requireFeatureEnabled(config.flagResolver, 'myFlag')]`
 *
 * Guidance:
 * - Prefer route-level usage (`this.route({ middleware: [...] })`) in controllers.
 * - Avoid broad prefix mounts (for example `/api/admin/projects`) where sibling routes
 *   can accidentally be gated.
 * - The route remains registered/discoverable; disabled features return `404` at request time.
 */
export declare const requireFeatureEnabled: (flagResolver: Pick<IFlagResolver, "isEnabled">, flagName: IFlagKey) => RequestHandler;
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