segmentation getOrCreateImageVolume.ts

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  import {
  cache,
  volumeLoader,
  utilities as csUtils,
  type Types,
} from '@cornerstonejs/core';
 
/**
 * Gets an existing image volume from cache or creates a new one from the provided image IDs
 * @param referencedImageIds - Array of image IDs to create the volume from
 * @returns The image volume or undefined if volume cannot be created
 */
function getOrCreateImageVolume(
  referencedImageIds: string[]
): Types.IImageVolume | undefined {
  if (!referencedImageIds || referencedImageIds.length <= 1) {
    return;
  }
 
  const isValidVolume = csUtils.isValidVolume(referencedImageIds);
 
  if (!isValidVolume) {
    return;
  }
 
  const volumeId = cache.generateVolumeId(referencedImageIds);
 
  // Check if volume already exists in cache
  let imageVolume = cache.getVolume(volumeId);
 
  if (imageVolume) {
    return imageVolume;
  }
 
  // Create and cache the volume if it doesn't exist
  imageVolume = volumeLoader.createAndCacheVolumeFromImagesSync(
    volumeId,
    referencedImageIds
  );
 
  return imageVolume;
}
 
export default getOrCreateImageVolume;