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import debounce from 'lodash.debounce';
import { roundNumber } from '@ohif/core/src/utils';
import {
SegmentationData,
SegmentationRepresentation,
} from '../services/SegmentationService/SegmentationService';
import { useSystem } from '@ohif/core';
const excludedModalities = ['SM', 'OT', 'DOC', 'ECG'];
function mapSegmentationToDisplay(segmentation, customizationService) {
const { label, segments, fallbackLabel } = segmentation;
// Get the readable text mapping once
const readableTextMap = customizationService.getCustomization('panelSegmentation.readableText');
// Helper function to recursively map cachedStats to readable display text
function mapStatsToDisplay(stats, indent = 0) {
const primary = [];
const indentation = ' '.repeat(indent);
for (const key in stats) {
if (Object.prototype.hasOwnProperty.call(stats, key)) {
const value = stats[key];
const readableText = readableTextMap?.[key];
if (!readableText) {
continue;
}
if (typeof value === 'object' && value !== null && !Array.isArray(value)) {
// Add empty row before category (except for the first category)
Iif (primary.length > 0) {
primary.push('');
}
// Add category title
primary.push(`${indentation}${readableText}`);
// Recursively handle nested objects
primary.push(...mapStatsToDisplay(value, indent + 1));
} else E{
// For non-nested values, don't add empty rows
primary.push(`${indentation}${readableText}: ${roundNumber(value, 2)}`);
}
}
}
return primary;
}
// Get customization for display text mapping
const displayTextMapper = segment => {
const defaultDisplay = {
primary: [],
secondary: [],
};
// If the segment has cachedStats, map it to readable text
if (segment.cachedStats) {
const primary = mapStatsToDisplay(segment.cachedStats);
defaultDisplay.primary = primary;
}
return defaultDisplay;
};
const updatedSegments = {};
Object.entries(segments).forEach(([segmentIndex, segment]) => {
updatedSegments[segmentIndex] = {
...segment,
displayText: displayTextMapper(segment),
};
});
// Map the segments and apply the display text mapper
return {
...segmentation,
label,
fallbackLabel,
segments: updatedSegments,
};
}
/**
* Represents the combination of segmentation data and its representation in a viewport.
*/
type ViewportSegmentationRepresentation = {
segmentationsWithRepresentations: {
representation: SegmentationRepresentation;
segmentation: SegmentationData;
}[];
disabled: boolean;
};
/**
* Custom hook that provides segmentation data and their representations for the active viewport.
* @param options - The options object.
* @param options.servicesManager - The services manager object.
* @param options.subscribeToDataModified - Whether to subscribe to segmentation data modifications.
* @param options.debounceTime - Debounce time in milliseconds for updates.
* @returns An array of segmentation data and their representations for the active viewport.
*/
export function useViewportSegmentations({
viewportId,
subscribeToDataModified = false,
debounceTime = 0,
}: {
viewportId: string;
subscribeToDataModified?: boolean;
debounceTime?: number;
}): ViewportSegmentationRepresentation {
const { servicesManager } = useSystem();
const { segmentationService, viewportGridService, customizationService, displaySetService } =
servicesManager.services;
const [segmentationsWithRepresentations, setSegmentationsWithRepresentations] =
useState<ViewportSegmentationRepresentation>({
segmentationsWithRepresentations: [],
disabled: false,
});
useEffect(() => {
const update = () => {
const displaySetUIDs = viewportGridService.getDisplaySetsUIDsForViewport(viewportId);
if (!displaySetUIDs?.length) {
return;
}
const displaySet = displaySetService.getDisplaySetByUID(displaySetUIDs[0]);
Iif (!displaySet) {
return;
}
Iif (excludedModalities.includes(displaySet.Modality)) {
setSegmentationsWithRepresentations(prev => ({
segmentationsWithRepresentations: [],
disabled: true,
}));
return;
}
const segmentations = segmentationService.getSegmentations();
if (!segmentations?.length) {
setSegmentationsWithRepresentations(prev => ({
segmentationsWithRepresentations: [],
disabled: false,
}));
return;
}
const representations = segmentationService.getSegmentationRepresentations(viewportId);
// Deduplicate representations by segmentationId to prevent showing
// the same segmentation multiple times in the panel when it has
// multiple representation types (e.g., labelmap and surface)
const uniqueSegmentationMap = new Map();
representations.forEach(representation => {
if (!uniqueSegmentationMap.has(representation.segmentationId)) {
uniqueSegmentationMap.set(representation.segmentationId, representation);
}
});
const newSegmentationsWithRepresentations = Array.from(uniqueSegmentationMap.values()).map(
representation => {
const segmentation = segmentationService.getSegmentation(representation.segmentationId);
const mappedSegmentation = mapSegmentationToDisplay(segmentation, customizationService);
return {
representation,
segmentation: mappedSegmentation,
};
}
);
setSegmentationsWithRepresentations({
segmentationsWithRepresentations: newSegmentationsWithRepresentations,
disabled: false,
});
};
const debouncedUpdate =
debounceTime > 0 ? debounce(update, debounceTime, { leading: true, trailing: true }) : update;
update();
const subscriptions = [
segmentationService.subscribe(
segmentationService.EVENTS.SEGMENTATION_MODIFIED,
debouncedUpdate
),
segmentationService.subscribe(
segmentationService.EVENTS.SEGMENTATION_REMOVED,
debouncedUpdate
),
segmentationService.subscribe(
segmentationService.EVENTS.SEGMENTATION_REPRESENTATION_MODIFIED,
debouncedUpdate
),
// What this hook reads is `getSegmentationRepresentations(viewportId)`, so a
// representation leaving the viewport changes its answer and has to re-run it.
// Without this, "Remove from Viewport" cleared the overlay from the image but
// left the segmentation listed in the panel: the data was already correct, the
// panel simply never asked again. Nothing else covers it — a hydrated
// segmentation is not a display set in the viewport, so removing it moves no
// grid state and fires no grid event either.
segmentationService.subscribe(
segmentationService.EVENTS.SEGMENTATION_REPRESENTATION_REMOVED,
debouncedUpdate
),
viewportGridService.subscribe(
viewportGridService.EVENTS.ACTIVE_VIEWPORT_ID_CHANGED,
debouncedUpdate
),
viewportGridService.subscribe(viewportGridService.EVENTS.GRID_STATE_CHANGED, debouncedUpdate),
];
Iif (subscribeToDataModified) {
subscriptions.push(
segmentationService.subscribe(
segmentationService.EVENTS.SEGMENTATION_DATA_MODIFIED,
debouncedUpdate
)
);
}
return () => {
subscriptions.forEach(subscription => subscription.unsubscribe());
Iif (debounceTime > 0) {
debouncedUpdate.cancel();
}
};
}, [
segmentationService,
viewportGridService,
customizationService,
displaySetService,
debounceTime,
subscribeToDataModified,
viewportId,
]);
return segmentationsWithRepresentations;
}
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