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import type { Types } from '@cornerstonejs/core';
import { Enums } from '@cornerstonejs/core';
import createImage from '../createImage';
import { xhrRequest } from '../internal/index';
import dataSetCacheManager from './dataSetCacheManager';
import type {
LoadRequestFunction,
DICOMLoaderIImage,
DICOMLoaderImageOptions,
} from '../../types';
import getPixelData from './getPixelData';
import loadFileRequest from './loadFileRequest';
import parseImageId from './parseImageId';
const { ImageQualityStatus } = Enums;
// add a decache callback function to clear out our dataSetCacheManager
function addDecache(imageLoadObject: Types.IImageLoadObject, imageId: string) {
imageLoadObject.decache = function () {
// console.log('decache');
const parsedImageId = parseImageId(imageId);
dataSetCacheManager.unload(parsedImageId.url);
};
}
/**
* Given the dataSetPromise and imageId this will return a promise to be
* resolved with an image object containing the loaded image.
*
* @param dataSetPromise - A promise that resolves to a DataSet object.
* @param imageId - The imageId of the image to be loaded.
* @param frame - The frame number to be loaded in case of multiframe. it should
* be noted that this is used to extract the pixelData from dicomParser and
* dicomParser is 0-based index (the first pixelData is frame 0); however,
* in metadata and imageId frame is 1-based index (the first frame is frame 1).
* @param sharedCacheKey - A key to be used to cache the loaded image.
* @param options - Options to be used when loading the image.
* @param callbacks - Callbacks to be called when the image is loaded.
* @returns An object containing a promise to be resolved with the loaded image
*/
function loadImageFromPromise(
dataSetPromise: Promise<DataSet>,
imageId: string,
frame = 0,
sharedCacheKey: string,
options: DICOMLoaderImageOptions,
callbacks?: {
imageDoneCallback: (image: DICOMLoaderIImage) => void;
}
): Types.IImageLoadObject {
const start = new Date().getTime();
const imageLoadObject: Types.IImageLoadObject = {
cancelFn: undefined,
promise: undefined,
};
imageLoadObject.promise = new Promise((resolve, reject) => {
dataSetPromise.then(
(dataSet /* , xhr*/) => {
const pixelData = getPixelData(dataSet, frame);
const transferSyntax = dataSet.string('x00020010');
const loadEnd = new Date().getTime();
const imagePromise = createImage(
imageId,
pixelData,
transferSyntax,
options
);
addDecache(imageLoadObject, imageId);
imagePromise.then(
(image) => {
image = image as DICOMLoaderIImage;
image.data = dataSet;
image.sharedCacheKey = sharedCacheKey;
const end = new Date().getTime();
image.loadTimeInMS = loadEnd - start;
image.totalTimeInMS = end - start;
image.imageQualityStatus = ImageQualityStatus.FULL_RESOLUTION;
Iif (
callbacks !== undefined &&
callbacks.imageDoneCallback !== undefined
) {
callbacks.imageDoneCallback(image);
}
resolve(image);
},
function (error) {
// Reject the error, and the dataSet
reject({
error,
dataSet,
});
}
);
},
function (error) {
// Reject the error
reject({
error,
});
}
);
});
return imageLoadObject;
}
function loadImageFromDataSet(
dataSet,
imageId: string,
frame = 0,
sharedCacheKey: string,
options
): Types.IImageLoadObject {
const start = new Date().getTime();
const promise = new Promise<DICOMLoaderIImage | Types.IImageFrame>(
(resolve, reject) => {
const loadEnd = new Date().getTime();
let imagePromise: Promise<DICOMLoaderIImage | Types.IImageFrame>;
try {
const pixelData = getPixelData(dataSet, frame);
const transferSyntax = dataSet.string('x00020010');
imagePromise = createImage(imageId, pixelData, transferSyntax, options);
} catch (error) {
// Reject the error, and the dataSet
reject({
error,
dataSet,
});
return;
}
imagePromise.then((image) => {
image = image as DICOMLoaderIImage;
image.data = dataSet;
// image.sharedCacheKey = sharedCacheKey;
const end = new Date().getTime();
image.loadTimeInMS = loadEnd - start;
image.totalTimeInMS = end - start;
image.imageQualityStatus = ImageQualityStatus.FULL_RESOLUTION;
resolve(image);
}, reject);
}
);
return {
promise: promise as Promise<Types.IImage>,
cancelFn: undefined,
};
}
function getLoaderForScheme(scheme: string): LoadRequestFunction {
if (scheme === 'dicomweb' || scheme === 'wadouri') {
return xhrRequest as LoadRequestFunction;
} else Eif (scheme === 'dicomfile') {
return loadFileRequest as LoadRequestFunction;
}
}
function loadImage(
imageId: string,
options: DICOMLoaderImageOptions = {}
): Types.IImageLoadObject {
const parsedImageId = parseImageId(imageId);
options = Object.assign({}, options);
// IMPORTANT: if you have a custom loader that you want to use for a specific
// scheme, you should create your own loader and register it with the scheme
// in the image loader, and NOT just pass it in as an option. This is because
// the scheme is used to determine the loader to use and is more maintainable
// The loader isn't transferable, so ensure it is deleted
delete options.loader;
// The options might have a loader above, but it is a loader into the cache,
// so not the scheme loader, which is separate and defined by the scheme here
const schemeLoader = getLoaderForScheme(parsedImageId.scheme);
// if the dataset for this url is already loaded, use it, in case of multiframe
// images, we need to extract the frame pixelData from the dataset although the
// image is loaded
Iif (dataSetCacheManager.isLoaded(parsedImageId.url)) {
/**
* @todo The arguments to the dataSetCacheManager below are incorrect.
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const dataSet: DataSet = (dataSetCacheManager as any).get(
parsedImageId.url,
schemeLoader,
imageId
);
return loadImageFromDataSet(
dataSet,
imageId,
parsedImageId.pixelDataFrame,
parsedImageId.url,
options
);
}
// load the dataSet via the dataSetCacheManager
const dataSetPromise = dataSetCacheManager.load(
parsedImageId.url,
schemeLoader,
imageId
);
return loadImageFromPromise(
dataSetPromise,
imageId,
parsedImageId.frame,
parsedImageId.url,
options
);
}
export { loadImageFromPromise, getLoaderForScheme, loadImage };
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