Method _gatherSources

modules/core/EditSystem.js:1268–1294

* _gatherSources * Get the sources used to make the `staging` edit. * @param {string|Object?} annotation - Rapid edits may optionally use an annotation that includes the data source used * @return {Object} sources Object containing `imagery`, `photos`, `data` properties

(annotation)

   * @return  {Object}  sources Object containing `imagery`, `photos`, `data` properties
   */
  _gatherSources(annotation) {
    const context = this.context;
    const gfx = context.systems.gfx;
    const imagery = context.systems.imagery;
    const photos = context.systems.photos;

    const sources = {};
    const imageryUsed = imagery.imageryUsed();
    if (imageryUsed.length)  {
      sources.imagery = imageryUsed;
    }

    const photosUsed = photos.photosUsed();
    if (photosUsed.length) {
      sources.photos = photosUsed;
    }

    const customLayer = gfx.scene.layers.get('custom-data');
    const customDataUsed = customLayer?.dataUsed() ?? [];
    const rapidDataUsed = annotation?.dataUsed ?? [];
    const dataUsed = [...rapidDataUsed, ...customDataUsed];
    if (dataUsed.length) {
      sources.data = dataUsed;
    }

    return sources;
  }


  /**