Method toDynamicValue

packages/context/src/binding.ts:794–817

* Bind the key to a computed (dynamic) value. * * @param factoryFn - The factory function creating the value. * Both sync and async functions are supported. * * @example * * ```ts * // synchronous * ctx.bind('now').toDynamicValue(() => Date.now()); * * // asynchron

(
    factory: ValueFactory<T> | DynamicValueProviderClass<T>,
  )

   * ```
   */
  toDynamicValue(
    factory: ValueFactory<T> | DynamicValueProviderClass<T>,
  ): this {
    /* istanbul ignore if */
    if (debug.enabled) {
      debug('Bind %s to dynamic value:', this.key, factory);
    }
    this._source = {
      type: BindingType.DYNAMIC_VALUE,
      value: factory,
    };

    let factoryFn: ValueFactory<T>;
    if (isDynamicValueProviderClass(factory)) {
      factoryFn = toValueFactory(factory);
    } else {
      factoryFn = factory;
    }
    this._setValueGetter(resolutionCtx => {
      const value = factoryFn(resolutionCtx);
      return Binding.valueOrProxy(resolutionCtx, value);
    });
    return this;
  }

  private static valueOrProxy<V>(
    resolutionCtx: ResolutionContext,