utilities getViewportModality.ts

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  import type { IViewport, IStackViewport, IVolumeViewport } from '../types';
import cache from '../cache';
 
function getViewportModality(viewport: IViewport, volumeId?: string): string {
  if ((viewport as IStackViewport).modality) {
    return (viewport as IStackViewport).modality;
  }
 
  if ((viewport as IVolumeViewport).setVolumes) {
    volumeId = volumeId ?? viewport.getDefaultActor()?.uid;
 
    if (!volumeId) {
      return;
    }
 
    return cache.getVolume(volumeId)?.metadata.Modality;
  }
 
  throw new Error('Invalid viewport type');
}
 
export { getViewportModality as default, getViewportModality };