ohif-viewer/extensions/cornerstone/src/utils/measurementServiceMappings/SegmentBidirectional.ts

import SUPPORTED_TOOLS from './constants/supportedTools';
import getSOPInstanceAttributes from './utils/getSOPInstanceAttributes';
import { utils } from '@ohif/core';
import { getDisplayUnit } from './utils';
import { getIsLocked } from './utils/getIsLocked';
import { getIsVisible } from './utils/getIsVisible';

const SegmentBidirectional = {
  toAnnotation: measurement => {},
  toMeasurement: (
    csToolsEventDetail,
    displaySetService,
    cornerstoneViewportService,
    getValueTypeFromToolType,
    customizationService
  ) => {
    const { annotation } = csToolsEventDetail;
    const { metadata, data, annotationUID } = annotation;
    const isLocked = getIsLocked(annotationUID);
    const isVisible = getIsVisible(annotationUID);

    if (!metadata || !data) {
      console.debug('SegmentBidirectional tool: Missing metadata or data');
      return null;
    }

    const { toolName, referencedImageId, FrameOfReferenceUID } = metadata;
    const validToolType = SUPPORTED_TOOLS.includes(toolName);

    if (!validToolType) {
      throw new Error('Tool not supported');
    }

    const { SOPInstanceUID, SeriesInstanceUID, StudyInstanceUID } = getSOPInstanceAttributes(
      referencedImageId,
      displaySetService,
      annotation
    );

    let displaySet;

    if (SOPInstanceUID) {
      displaySet = displaySetService.getDisplaySetForSOPInstanceUID(
        SOPInstanceUID,
        SeriesInstanceUID
      );
    } else {
      displaySet = displaySetService.getDisplaySetsForSeries(SeriesInstanceUID)[0];
    }

    const { points, textBox } = data.handles;

    const mappedAnnotations = getMappedAnnotations(annotation, displaySetService);

    const displayText = getDisplayText(mappedAnnotations, displaySet);
    const getReport = () =>
      _getReport(mappedAnnotations, points, FrameOfReferenceUID, customizationService);

    return {
      uid: annotationUID,
      SOPInstanceUID,
      FrameOfReferenceUID,
      points,
      textBox,
      isLocked,
      isVisible,
      metadata,
      referenceSeriesUID: SeriesInstanceUID,
      referenceStudyUID: StudyInstanceUID,
      referencedImageId,
      frameNumber: mappedAnnotations[0]?.frameNumber || 1,
      toolName: metadata.toolName,
      displaySetInstanceUID: displaySet.displaySetInstanceUID,
      label: data.label,
      displayText: displayText,
      data: data.cachedStats,
      type: getValueTypeFromToolType(toolName),
      getReport,
    };
  },
};

function getMappedAnnotations(annotation, displaySetService) {
  const { metadata, data } = annotation;
  const { cachedStats } = data;
  const { referencedImageId } = metadata;
  const targets = Object.keys(cachedStats);

  if (!targets.length) {
    return [];
  }

  const annotations = [];
  Object.keys(cachedStats).forEach(targetId => {
    const targetStats = cachedStats[targetId];

    const { SOPInstanceUID, SeriesInstanceUID, frameNumber } = getSOPInstanceAttributes(
      referencedImageId,
      displaySetService,
      annotation
    );

    const displaySet = displaySetService.getDisplaySetsForSeries(SeriesInstanceUID)[0];

    const { SeriesNumber } = displaySet;
    const { length, width, unit } = targetStats;

    annotations.push({
      SeriesInstanceUID,
      SOPInstanceUID,
      SeriesNumber,
      frameNumber,
      unit,
      length,
      width,
    });
  });

  return annotations;
}

function _getReport(mappedAnnotations, points, FrameOfReferenceUID, customizationService) {
  const columns = [];
  const values = [];

  // Add Type
  columns.push('AnnotationType');
  values.push('Cornerstone:SegmentBidirectional');

  mappedAnnotations.forEach(annotation => {
    const { length, width, unit } = annotation;
    columns.push(`Length`, `Width`, 'Unit');
    values.push(length, width, unit);
  });

  if (FrameOfReferenceUID) {
    columns.push('FrameOfReferenceUID');
    values.push(FrameOfReferenceUID);
  }

  if (points) {
    columns.push('points');
    values.push(points.map(p => p.join(' ')).join(';'));
  }

  return {
    columns,
    values,
  };
}

function getDisplayText(mappedAnnotations, displaySet) {
  const displayText = {
    primary: [],
    secondary: [],
  };

  if (!mappedAnnotations || !mappedAnnotations.length) {
    return displayText;
  }

  // Area is the same for all series
  const { length, width, unit, SeriesNumber, SOPInstanceUID, frameNumber } = mappedAnnotations[0];
  const roundedLength = utils.roundNumber(length, 2);
  const roundedWidth = utils.roundNumber(width, 2);

  const instance = displaySet.instances.find(image => image.SOPInstanceUID === SOPInstanceUID);

  let InstanceNumber;
  if (instance) {
    InstanceNumber = instance.InstanceNumber;
  }

  const instanceText = InstanceNumber ? ` I: ${InstanceNumber}` : '';
  const frameText = displaySet.isMultiFrame ? ` F: ${frameNumber}` : '';

  displayText.primary.push(`L: ${roundedLength} ${getDisplayUnit(unit)}`);
  displayText.primary.push(`W: ${roundedWidth} ${getDisplayUnit(unit)}`);
  displayText.secondary.push(`S: ${SeriesNumber}${instanceText}${frameText}`);

  return displayText;
}

export default SegmentBidirectional;