async getGeoJson()

in src/file_layer.ts [36:61]

• 24 lines of code
• 5 McCabe index (conditional complexity)

  async getGeoJson(): Promise<FeatureCollection | undefined> {
    const cachedGeoJson = this._emsClient.getCachedGeoJson(this.getId());
    if (cachedGeoJson) {
      return cachedGeoJson;
    }

    const format = this.getDefaultFormatType();
    const fetchUrl = this.getDefaultFormatUrl();
    let geojson;
    const fetchedJson = await this._emsClient.getManifest(fetchUrl);
    if (fetchedJson) {
      if (format === 'geojson') {
        geojson = fetchedJson as unknown as FeatureCollection;
      } else if (format === 'topojson') {
        const meta = this.getDefaultFormatMeta();
        const featureCollectionPath = meta?.feature_collection_path ?? 'data';
        // @ts-expect-error see https://github.com/DefinitelyTyped/DefinitelyTyped/pull/52156
        geojson = topojson.feature(fetchedJson, featureCollectionPath) as FeatureCollection;
      } else {
        return;
      }
      this._emsClient.cacheGeoJson(this.getId(), geojson);
      return geojson;
    }
    return;
  }