Method getFactoryProviderDependencies

packages/core/injector/injector.ts:427–465

(
    wrapper: InstanceWrapper<T>,
  )

  }

  public getFactoryProviderDependencies<T>(
    wrapper: InstanceWrapper<T>,
  ): [InjectorDependency[], number[]] {
    const optionalDependenciesIds: number[] = [];

    /**
     * Same as the internal utility function `isOptionalFactoryDependency` from `@nestjs/common`.
     * We are duplicating it here because that one is not supposed to be exported.
     */
    function isOptionalFactoryDependency(
      value: InjectionToken | OptionalFactoryDependency,
    ): value is OptionalFactoryDependency {
      return (
        !isUndefined((value as OptionalFactoryDependency).token) &&
        !isUndefined((value as OptionalFactoryDependency).optional) &&
        !(value as any).prototype
      );
    }

    const mapFactoryProviderInjectArray = (
      item: InjectionToken | OptionalFactoryDependency,
      index: number,
    ): InjectionToken => {
      if (typeof item !== 'object') {
        return item;
      }
      if (isOptionalFactoryDependency(item)) {
        if (item.optional) {
          optionalDependenciesIds.push(index);
        }
        return item?.token;
      }
      return item;
    };
    return [
      wrapper.inject?.map?.(mapFactoryProviderInjectArray) as any[],
      optionalDependenciesIds,
    ];
  }

  public reflectConstructorParams(type: Type<unknown> | Function): any[] {
    const paramtypes = [