ohif-viewer/platform/docs/docs/platform/extensions/modules/utility.md

sidebar_position	sidebar_label	title	summary
9	Utility	Utility Module	Documentation for OHIF Utility Module, which exposes reusable functionality from one extension to others, allowing for sharing of internal methods, services, and enumerations across the application architecture.

Module: Utility

Overview

Often, an extension will need to expose some useful functionality to the other extensions, or modes that consume the extension. For example, the cornerstone extension, uses its utility module to expose methods via

getUtilityModule({ servicesManager }) {
    return [
      {
        name: 'common',
        exports: {
          getCornerstoneLibraries: () => {
            return { cornerstone, cornerstoneTools };
          },
          getEnabledElement,
          CornerstoneViewportService,
          dicomLoaderService,
        },
      },
      {
        name: 'core',
        exports: {
          Enums: cs3DEnums,
        },
      },
      {
        name: 'tools',
        exports: {
          toolNames,
          Enums: cs3DToolsEnums,
        },
      },
    ];
  },
};

Then a consuming extension can use getModuleEntry to access the methods Below, which is a code from TrackedCornerstoneViewport use the getUtilityModule method to get the internal CornerstoneViewportService which handles the Cornerstone viewport.

const utilityModule = extensionManager.getModuleEntry(
  '@ohif/extension-cornerstone.utilityModule.common'
);

const { CornerstoneViewportService } = utilityModule.exports;