Class JsonManager

GDJS/Runtime/jsonmanager.ts:28–228

   * @category Resources > JSON
   */
  export class JsonManager implements gdjs.ResourceManager {
    _resourceLoader: ResourceLoader;

    _loadedJsons = new gdjs.ResourceCache<Object>();
    _callbacks = new gdjs.ResourceCache<Array<JsonManagerRequestCallback>>();

    /**
     * @param resourceLoader The resources loader of the game.
     */
    constructor(resourceLoader: gdjs.ResourceLoader) {
      this._resourceLoader = resourceLoader;
    }

    getResourceKinds(): ResourceKind[] {
      return resourceKinds;
    }

    /**
     * Request all the json resources to be preloaded (unless they are marked as not preloaded).
     *
     * Note that even if a JSON is already loaded, it will be reloaded (useful for hot-reloading,
     * as JSON files can have been modified without the editor knowing).
     */
    async loadResource(resourceName: string): Promise<void> {
      const resource = this._resourceLoader.getResource(resourceName);
      if (!resource) {
        logger.warn('Unable to find json for resource "' + resourceName + '".');
        return;
      }
      if (resource.disablePreload) {
        return;
      }

      try {
        await this.loadJsonAsync(resource.name);
      } catch (error) {
        logger.error(
          `Error while preloading json resource ${resource.name}:`,
          error
        );
        throw error;
      }
    }

    loadJsonAsync(resourceName: string): Promise<Object | null> {
      const that = this;
      return new Promise((resolve, reject) => {
        that.loadJson(resourceName, (error, content) => {
          if (error) {
            reject(error.message);
          }
          resolve(content);
        });
      });
    }

    private _getJsonResource = (resourceName: string): ResourceData | null => {
      const resource = this._resourceLoader.getResource(resourceName);