| 1 | import { Observable } from 'rxjs';
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| 2 | import { ExecutionContext } from './execution-context.interface';
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| 3 | /**
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| 4 | * Interface providing access to the response stream.
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| 5 | *
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| 6 | * @see [Interceptors](https://docs.nestjs.com/interceptors)
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| 7 | *
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| 8 | * @publicApi
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| 9 | */
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| 10 | export interface CallHandler<T = any> {
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| 11 | /**
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| 12 | * Returns an `Observable` representing the response stream from the route
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| 13 | * handler.
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| 14 | */
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| 15 | handle(): Observable<T>;
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| 16 | }
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| 17 | /**
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| 18 | * Interface describing implementation of an interceptor.
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| 19 | *
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| 20 | * @see [Interceptors](https://docs.nestjs.com/interceptors)
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| 21 | *
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| 22 | * @publicApi
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| 23 | */
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| 24 | export interface NestInterceptor<T = any, R = any> {
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| 25 | /**
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| 26 | * Method to implement a custom interceptor.
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| 27 | *
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| 28 | * @param context an `ExecutionContext` object providing methods to access the
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| 29 | * route handler and class about to be invoked.
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| 30 | * @param next a reference to the `CallHandler`, which provides access to an
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| 31 | * `Observable` representing the response stream from the route handler.
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| 32 | */
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| 33 | intercept(context: ExecutionContext, next: CallHandler<T>): Observable<R> | Promise<Observable<R>>;
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| 34 | }
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