text: import { Session } from 'meteor/session';
  import { $ } from 'meteor/jquery';
  import { OHIF } from 'meteor/ohif:core';
  import { setActiveViewport } from './setActiveViewport';
  
  const loadPreviousActivePanel = () => {
      OHIF.log.info('nextActivePanel');
      let currentIndex = Session.get('activeViewport');
      currentIndex--;
  
      const $viewports = $('.imageViewerViewport');
      const numViewports = $viewports.length;
      if (currentIndex < 0) {
          currentIndex = numViewports - 1;
      }
  
      const element = $viewports.get(currentIndex);
      if (!element) {
          return;
      }
  
      setActiveViewport(element);
  };
  
  const loadNextActivePanel = () => {
      OHIF.log.info('nextActivePanel');
      let currentIndex = Session.get('activeViewport');
      currentIndex++;
  
      const $viewports = $('.imageViewerViewport');
      const numViewports = $viewports.length;
      if (currentIndex >= numViewports) {
          currentIndex = 0;
      }
  
      const element = $viewports.get(currentIndex);
      if (!element) {
          return;
      }
  
      setActiveViewport(element);
  };
  
  /**
   * Export functions inside panelNavigation namespace.
   */
  
  const panelNavigation = {
      loadPreviousActivePanel,
      loadNextActivePanel
  };
  
  export { panelNavigation };
  