private openSelectedAnnotationOverlay()

in pathology/viewer/src/components/image-viewer-side-nav/image-viewer-side-nav.component.ts [1405:1453]
43 lines of code
14 McCabe index (conditional complexity)

  private openSelectedAnnotationOverlay(
      feature: ol.Feature, openOnSingleClick = true) {
    const olMap = this.olMap;

    if (!olMap || !this.selectedAnnotationOverlay) return;
    this.selectedFeature = feature;
    let coordinates: Coordinate[] = [];

    if (feature.getGeometry()?.getType() === 'Polygon') {
      const polygonFeature = feature as Feature<Polygon>;
      const featureCoordinates =
          (polygonFeature.getGeometry()?.getCoordinates() ?? []);
      coordinates = featureCoordinates[0];

      const isROI = getFeatureAnnotationKey(feature).names.includes('ROI');
      const isMeasure =
          getFeatureAnnotationKey(feature).names.includes('MEASURE');
      if (isROI || isMeasure) {
        coordinates = polygonFeature.getGeometry()?.getCoordinates()[0] ?? [];
      }
    }
    if (feature.getGeometry()?.getType() === 'Point') {
      const pointFeature = feature as Feature<Point>;
      const pointCoordinate = pointFeature.getGeometry()?.getCoordinates();
      coordinates = pointCoordinate ? [pointCoordinate] : [];
    }

    const coordinate = getRightMostCoordinate(coordinates);

    if (!coordinate?.length) return;

    this.selectedAnnotationOverlay.setPosition(coordinate);
    if (!openOnSingleClick) {
      const positionChangeListener =
          this.selectedAnnotationOverlay?.on('change:position', (position) => {
            const targetOverlay = position.target as ol.Overlay;
            const targetOverlayPosition: Coordinate|undefined =
                targetOverlay?.getPosition();
            if (this.selectedAnnotationOverlay && !targetOverlayPosition &&
                olMap) {
              olMap.removeOverlay(this.selectedAnnotationOverlay);
              this.selectedFeature = undefined;
            }
            if (positionChangeListener) {
              unByKey(positionChangeListener);
            }
          });
    }
  }