Js Factory DefaultObjectFactory createObjectWithDefaults

gistfile1.txt

interface Product {
        name: string;
        price: number;
        inStock: boolean;
      }
      type DefaultValues = {
        string: string;
        number: number;
        boolean: boolean;
      };
      const defaultValues: DefaultValues = {
        string: "",
        number: 0,
        boolean: false,
      };
      class DefaultObjectFactory<T> {
        createObjectWithDefault(): T {
          const obj: any = {};
          (Object.keys(defaultValues) as Array<keyof T>).forEach((key) => {
            const typeOfKey = typeof defaultValues[key as keyof DefaultValues];
            switch (typeOfKey) {
              case "string":
                obj[key] = "";
                break;
              case "number":
                obj[key] = 0;
                break;
              case "boolean":
                obj[key] = false;
                break;
              default:
                obj[key] = null;
            }
          });
          return obj as T;
        }
      }
      function createObjectWithDefaults<T>(): T {
        const obj: any = {};
        (Object.keys(defaultValues) as Array<keyof T>).forEach((key) => {
          const typeOfKey = typeof defaultValues[key as keyof DefaultValues];
          switch (typeOfKey) {
            case "string":
              obj[key] = "";
              break;
            case "number":
              obj[key] = 0;
              break;
            case "boolean":
              obj[key] = false;
              break;
            default:
              obj[key] = null;
          }
        });
        return obj as T;
      }
      // Function
      const product = createObjectWithDefaults<Product>();
      console.debug(" product : ",  product);
      // Factory
      const factory = new DefaultObjectFactory<Product>();
      const defaultProduct = factory.createObjectWithDefault();
      console.debug("defaultProduct : ", defaultProduct);