import { CanvasModel } from '../models/controls/CanvasModel';

/**
 * Serves as temporal storage while the real model is not available.
 * When the real model is ready, data can be copied into it.
 */
export class ModelProxy {
  private constructor() {}

  /**
   * Returns a new model proxy.
   */
  static create<T>(): T {
    return new ModelProxy() as unknown as T;
  }

  /**
   * Copy data saved in proxy into the actual model.
   * @param source A model proxy.
   * @param destination The actual model.
   */
  static copy<T>(source: T, destination: T): void {
    for (const key in source) {
      const keyname = key.toString();
      if (source.hasOwnProperty(keyname)) {
        if (
          keyname === CanvasModel.ZIndexProperty.name &&
          (<any>destination).setValue
        ) {
          (<any>destination).setValue(
            CanvasModel.ZIndexProperty,
            source[keyname]
          );
        } else {
          destination[keyname] = source[keyname];
        }
      }
    }
  }
}