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import type { Types } from '@cornerstonejs/core';
import { utilities as csUtils } from '@cornerstonejs/core';
import { SegmentationRepresentations } from '../../enums';
import getDefaultContourConfig from '../../tools/displayTools/Contour/contourConfig';
import getDefaultLabelmapConfig from '../../tools/displayTools/Labelmap/labelmapConfig';
import getDefaultSurfaceConfig from '../../tools/displayTools/Surface/surfaceConfig';
import type {
RepresentationConfig,
Segmentation,
SegmentationRepresentationConfig,
SegmentationState,
SegmentSpecificRepresentationConfig,
ToolGroupSpecificRepresentation,
ToolGroupSpecificRepresentations,
} from '../../types/SegmentationStateTypes';
// Initialize the default configuration
// Note: when we get other representations, we should set their default representations too.
const defaultLabelmapConfig = getDefaultLabelmapConfig();
const defaultContourConfig = getDefaultContourConfig();
const defaultSurfaceConfig = getDefaultSurfaceConfig();
const newGlobalConfig: SegmentationRepresentationConfig = {
renderInactiveSegmentations: true,
representations: {
[SegmentationRepresentations.Labelmap]: defaultLabelmapConfig,
[SegmentationRepresentations.Contour]: defaultContourConfig,
[SegmentationRepresentations.Surface]: defaultSurfaceConfig,
},
};
/* A default initial state for the segmentation manager. */
const initialDefaultState: SegmentationState = {
colorLUT: [],
segmentations: [],
globalConfig: newGlobalConfig,
toolGroups: {},
};
/**
* The SegmentationStateManager Class is responsible for managing the state of the
* segmentations. It stores the segmentations and toolGroup specific representations
* of the segmentation. It also stores a global config and a toolGroup specific
* config. Note that this is a singleton state manager.
*/
export default class SegmentationStateManager {
private state: SegmentationState;
public readonly uid: string;
constructor(uid?: string) {
Iif (!uid) {
uid = csUtils.uuidv4();
}
this.state = cloneDeep(initialDefaultState);
this.uid = uid;
}
/**
* It returns a copy of the current state of the segmentation
* @returns A deep copy of the state.
*/
getState(): SegmentationState {
return this.state;
}
/**
* It returns an array of toolGroupIds currently in the segmentation state.
* @returns An array of strings.
*/
getToolGroups(): string[] {
return Object.keys(this.state.toolGroups);
}
/**
* It returns the colorLUT at the specified index.
* @param lutIndex - The index of the color LUT to retrieve.
* @returns A ColorLUT object.
*/
getColorLUT(lutIndex: number): Types.ColorLUT | undefined {
return this.state.colorLUT[lutIndex];
}
getNextColorLUTIndex(): number {
return this.state.colorLUT.length;
}
/**
* Reset the state to the default state
*/
resetState(): void {
this.state = cloneDeep(initialDefaultState);
}
/**
* Given a segmentation Id, return the segmentation state
* @param segmentationId - The id of the segmentation to get the data for.
* @returns - The segmentation data
*/
getSegmentation(segmentationId: string): Segmentation | undefined {
return this.state.segmentations.find(
(segmentation) => segmentation.segmentationId === segmentationId
);
}
/**
* It adds a segmentation to the segmentations array.
* @param segmentation - Segmentation
*/
addSegmentation(segmentation: Segmentation): void {
// Check if the segmentation already exists with the segmentationId
Iif (this.getSegmentation(segmentation.segmentationId)) {
throw new Error(
`Segmentation with id ${segmentation.segmentationId} already exists`
);
}
this.state.segmentations.push(segmentation);
}
/**
* Get the segmentation representations for a tool group
* @param toolGroupId - string
* @returns A list of segmentation representations.
*/
getSegmentationRepresentations(
toolGroupId: string
): ToolGroupSpecificRepresentations | undefined {
const toolGroupSegRepresentationsWithConfig =
this.state.toolGroups[toolGroupId];
if (!toolGroupSegRepresentationsWithConfig) {
return;
}
return toolGroupSegRepresentationsWithConfig.segmentationRepresentations;
}
/**
* Returns an array of all segmentation representations for all tool groups.
* @returns An array of ToolGroupSpecificRepresentations.
*/
getAllSegmentationRepresentations(): Record<
string,
ToolGroupSpecificRepresentation[]
> {
const toolGroupSegReps: Record<string, ToolGroupSpecificRepresentation[]> =
{};
Object.entries(this.state.toolGroups).forEach(
([toolGroupId, toolGroupSegRepresentationsWithConfig]) => {
toolGroupSegReps[toolGroupId] =
toolGroupSegRepresentationsWithConfig.segmentationRepresentations;
}
);
return toolGroupSegReps;
}
/**
* Add a new segmentation representation to the toolGroup's segmentation representations.
* @param toolGroupId - The Id of the tool group .
* @param segmentationRepresentation - The segmentation representation to add.
*/
addSegmentationRepresentation(
toolGroupId: string,
segmentationRepresentation: ToolGroupSpecificRepresentation
): void {
// Initialize the default toolGroup state if not created yet
if (!this.state.toolGroups[toolGroupId]) {
this.state.toolGroups[toolGroupId] = {
segmentationRepresentations: [],
config: {} as SegmentationRepresentationConfig,
};
}
// local toolGroupSpecificSegmentationState
this.state.toolGroups[toolGroupId].segmentationRepresentations.push(
segmentationRepresentation
);
this._handleActiveSegmentation(toolGroupId, segmentationRepresentation);
}
/**
* Get the global config containing both representation config
* and render inactive segmentations config
* @returns The global config object.
*/
getGlobalConfig(): SegmentationRepresentationConfig {
return this.state.globalConfig;
}
/**
* It sets the global segmentation config including both representation config
* and render inactive segmentations config
* @param config - The global configuration for the segmentations.
*/
setGlobalConfig(config: SegmentationRepresentationConfig): void {
this.state.globalConfig = config;
}
/**
* Given a toolGroupId and a segmentationRepresentationUID, return the segmentation
* representation for that tool group.
* @param toolGroupId - The Id of the tool group
* @param segmentationRepresentationUID - string
* @returns The segmentation representation.
*/
getSegmentationRepresentationByUID(
toolGroupId: string,
segmentationRepresentationUID: string
): ToolGroupSpecificRepresentation | undefined {
const toolGroupSegRepresentations =
this.getSegmentationRepresentations(toolGroupId);
const segmentationData = toolGroupSegRepresentations?.find(
(representation) =>
representation.segmentationRepresentationUID ===
segmentationRepresentationUID
);
return segmentationData;
}
/**
* It removes the segmentation from the segmentation state.
* @param segmentationId - The id of the segmentation to remove.
*/
removeSegmentation(segmentationId: string): void {
this.state.segmentations = this.state.segmentations.filter(
(segmentation) => segmentation.segmentationId !== segmentationId
);
}
/**
* Remove a segmentation representation from the toolGroup
* @param toolGroupId - The Id of the tool group
* @param segmentationRepresentationUID - the uid of the segmentation representation to remove
* @param immediate - If true, the viewport will be updated immediately.
*/
removeSegmentationRepresentation(
toolGroupId: string,
segmentationRepresentationUID: string
): void {
const toolGroupSegmentationRepresentations =
this.getSegmentationRepresentations(toolGroupId);
Iif (
!toolGroupSegmentationRepresentations ||
!toolGroupSegmentationRepresentations.length
) {
throw new Error(
`No viewport specific segmentation state found for viewport ${toolGroupId}`
);
}
const state =
toolGroupSegmentationRepresentations as ToolGroupSpecificRepresentations;
const index = state.findIndex(
(segData) =>
segData.segmentationRepresentationUID === segmentationRepresentationUID
);
Iif (index === -1) {
console.warn(
`No viewport specific segmentation state data found for viewport ${toolGroupId} and segmentation data UID ${segmentationRepresentationUID}`
);
}
const removedSegmentationRepresentation =
toolGroupSegmentationRepresentations[index];
toolGroupSegmentationRepresentations.splice(index, 1);
this._handleActiveSegmentation(
toolGroupId,
removedSegmentationRepresentation
);
}
/**
* Set the active segmentation data for a tool group
* @param toolGroupId - The Id of the tool group that owns the
* segmentation data.
* @param segmentationRepresentationUID - string
*/
setActiveSegmentationRepresentation(
toolGroupId: string,
segmentationRepresentationUID: string
): void {
const toolGroupSegmentations =
this.getSegmentationRepresentations(toolGroupId);
if (!toolGroupSegmentations || !toolGroupSegmentations.length) {
throw new Error(
`No segmentation data found for toolGroupId: ${toolGroupId}`
);
}
const segmentationData = toolGroupSegmentations.find(
(segmentationData) =>
segmentationData.segmentationRepresentationUID ===
segmentationRepresentationUID
);
if (!segmentationData) {
throw new Error(
`No segmentation data found for segmentation data UID ${segmentationRepresentationUID}`
);
}
segmentationData.active = true;
this._handleActiveSegmentation(toolGroupId, segmentationData);
}
/**
* Given a tool group Id it returns the tool group specific representation config
*
* @param toolGroupId - The Id of the tool group
* @returns A SegmentationConfig object.
*/
getToolGroupSpecificConfig(
toolGroupId: string
): SegmentationRepresentationConfig | undefined {
const toolGroupStateWithConfig = this.state.toolGroups[toolGroupId];
if (!toolGroupStateWithConfig) {
return;
}
return toolGroupStateWithConfig.config;
}
getSegmentationRepresentationSpecificConfig(
toolGroupId: string,
segmentationRepresentationUID: string
): RepresentationConfig {
const segmentationRepresentation = this.getSegmentationRepresentationByUID(
toolGroupId,
segmentationRepresentationUID
);
Iif (!segmentationRepresentation) {
return;
}
return segmentationRepresentation.segmentationRepresentationSpecificConfig;
}
setSegmentationRepresentationSpecificConfig(
toolGroupId: string,
segmentationRepresentationUID: string,
config: RepresentationConfig
): void {
const segmentationRepresentation = this.getSegmentationRepresentationByUID(
toolGroupId,
segmentationRepresentationUID
);
if (!segmentationRepresentation) {
return;
}
segmentationRepresentation.segmentationRepresentationSpecificConfig =
config;
}
getSegmentSpecificConfig(
toolGroupId: string,
segmentationRepresentationUID: string,
segmentIndex: number
): RepresentationConfig {
const segmentationRepresentation = this.getSegmentationRepresentationByUID(
toolGroupId,
segmentationRepresentationUID
);
Iif (!segmentationRepresentation) {
return;
}
return segmentationRepresentation.segmentSpecificConfig[segmentIndex];
}
setSegmentSpecificConfig(
toolGroupId: string,
segmentationRepresentationUID: string,
config: SegmentSpecificRepresentationConfig,
options?: {
clear: false;
}
): void {
const segmentationRepresentation = this.getSegmentationRepresentationByUID(
toolGroupId,
segmentationRepresentationUID
);
if (!segmentationRepresentation) {
return;
}
if (!segmentationRepresentation.segmentSpecificConfig || options?.clear) {
segmentationRepresentation.segmentSpecificConfig = {};
}
Object.keys(config).forEach((key) => {
segmentationRepresentation.segmentSpecificConfig[key] = config[key];
});
}
/**
* Set the segmentation representations config for a given tool group. It will create a new
* tool group specific config if one does not exist.
*
* @param toolGroupId - The Id of the tool group that the segmentation
* belongs to.
* @param config - SegmentationConfig
*/
setSegmentationRepresentationConfig(
toolGroupId: string,
config: SegmentationRepresentationConfig
): void {
let toolGroupStateWithConfig = this.state.toolGroups[toolGroupId];
Eif (!toolGroupStateWithConfig) {
this.state.toolGroups[toolGroupId] = {
segmentationRepresentations: [],
config: {
renderInactiveSegmentations: true,
representations: {},
},
};
toolGroupStateWithConfig = this.state.toolGroups[toolGroupId];
}
toolGroupStateWithConfig.config = {
...toolGroupStateWithConfig.config,
...config,
};
}
/**
* It adds a color LUT to the state.
* @param colorLUT - ColorLUT
* @param lutIndex - The index of the color LUT table to add.
*/
addColorLUT(colorLUT: Types.ColorLUT, lutIndex: number): void {
Iif (this.state.colorLUT[lutIndex]) {
console.warn('Color LUT table already exists, overwriting');
}
this.state.colorLUT[lutIndex] = cloneDeep(colorLUT);
}
/**
* Removes a color LUT to the state.
* @param colorLUTIndex - The index of the color LUT table to remove.
*/
removeColorLUT(colorLUTIndex: number): void {
delete this.state.colorLUT[colorLUTIndex];
}
/**
* It handles the active segmentation representation based on the active status of the
* segmentation representation that was added or removed.
*
* @param toolGroupId - The Id of the tool group that the segmentation representation belongs to.
* @param recentlyAddedOrRemovedSegmentationRepresentation - ToolGroupSpecificSegmentationData
*/
_handleActiveSegmentation(
toolGroupId: string,
recentlyAddedOrRemovedSegmentationRepresentation: ToolGroupSpecificRepresentation
): void {
const segmentationRepresentations =
this.getSegmentationRepresentations(toolGroupId);
// 1. If there is no segmentation representations, return early
if (segmentationRepresentations.length === 0) {
return;
}
// 2. If there is only one segmentation representation, make that one active
if (segmentationRepresentations.length === 1) {
segmentationRepresentations[0].active = true;
return;
}
// 3. If removed Segmentation representation was active, make the first one active
const activeSegmentationRepresentations =
segmentationRepresentations.filter(
(representation) => representation.active
);
Iif (activeSegmentationRepresentations.length === 0) {
segmentationRepresentations[0].active = true;
return;
}
// 4. If the added segmentation representation is active, make other segmentation
// representations inactive
Eif (recentlyAddedOrRemovedSegmentationRepresentation.active) {
segmentationRepresentations.forEach((representation) => {
if (
representation.segmentationRepresentationUID !==
recentlyAddedOrRemovedSegmentationRepresentation.segmentationRepresentationUID
) {
representation.active = false;
}
});
}
// 5. if added/removed segmentation is is inactive, do nothing
}
}
const defaultSegmentationStateManager = new SegmentationStateManager('DEFAULT');
export { defaultSegmentationStateManager };
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