Function middleware

packages/platform/src/HttpApiBuilder.ts:937–958

(
  ...args: [
    middleware: MiddlewareFn<any, any> | Effect.Effect<MiddlewareFn<any, any>, any, any>,
    options?: {
      readonly withContext?: boolean | undefined
    } | undefined
  ] | [
    api: HttpApi.HttpApi.Any,
    middleware: MiddlewareFn<any, any> | Effect.Effect<MiddlewareFn<any, any>, any, any>,
    options?: {
      readonly withContext?: boolean | undefined
    } | undefined
  ]
)

    }
  ): Layer.Layer<never, EX, Exclude<HttpRouter.HttpRouter.ExcludeProvided<R> | RX, Scope>>
} = (
  ...args: [
    middleware: MiddlewareFn<any, any> | Effect.Effect<MiddlewareFn<any, any>, any, any>,
    options?: {
      readonly withContext?: boolean | undefined
    } | undefined
  ] | [
    api: HttpApi.HttpApi.Any,
    middleware: MiddlewareFn<any, any> | Effect.Effect<MiddlewareFn<any, any>, any, any>,
    options?: {
      readonly withContext?: boolean | undefined
    } | undefined
  ]
): any => {
  const apiFirst = HttpApi.isHttpApi(args[0])
  const withContext = apiFirst ? args[2]?.withContext === true : (args as any)[1]?.withContext === true
  const add = withContext ? middlewareAdd : middlewareAddNoContext
  const middleware = apiFirst ? args[1] : args[0]
  return (Effect.isEffect(middleware)
    ? Layer.scopedDiscard(Effect.flatMap(middleware as any, add))
    : Layer.scopedDiscard(add(middleware as any))).pipe(Layer.provide(Middleware.layer))
}

/**
 * A CORS middleware layer that can be provided to the `HttpApiBuilder.serve` layer.