120 lines
3.8 KiB
JavaScript
120 lines
3.8 KiB
JavaScript
import { Viewerbase } from 'meteor/ohif:viewerbase';
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const InstanceMetadata = Viewerbase.metadata.InstanceMetadata;
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const DICOMTagDescriptions = Viewerbase.DICOMTagDescriptions;
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export class OHIFInstanceMetadata extends InstanceMetadata {
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/**
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* @param {Object} Instance object.
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*/
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constructor(data, series, study, uid) {
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super(data, uid);
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this.init(series, study);
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}
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init(series, study) {
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const instance = this.getData();
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// Initialize Private Properties
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Object.defineProperties(this, {
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_sopInstanceUID: {
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configurable: false,
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enumerable: false,
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writable: false,
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value: instance.sopInstanceUid
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},
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_study: {
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configurable: false,
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enumerable: false,
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writable: false,
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value: study
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},
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_series: {
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configurable: false,
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enumerable: false,
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writable: false,
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value: series
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},
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_instance: {
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configurable: false,
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enumerable: false,
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writable: false,
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value: instance
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},
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_cache: {
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configurable: false,
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enumerable: false,
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writable: false,
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value: Object.create(null)
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}
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});
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}
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// Override
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getTagValue(tagOrProperty, defaultValue, bypassCache) {
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// check if this property has been cached...
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if (tagOrProperty in this._cache && bypassCache !== true) {
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return this._cache[tagOrProperty];
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}
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const propertyName = OHIFInstanceMetadata.getPropertyName(tagOrProperty);
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// Search property value in the whole study metadata chain...
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let rawValue;
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if (propertyName in this._instance) {
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rawValue = this._instance[propertyName];
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} else if (propertyName in this._series) {
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rawValue = this._series[propertyName];
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} else if (propertyName in this._study) {
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rawValue = this._study[propertyName];
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}
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if (rawValue !== void 0) {
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// if rawValue value is not undefined, cache result...
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this._cache[tagOrProperty] = rawValue;
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return rawValue;
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}
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return defaultValue;
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}
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// Override
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tagExists(tagOrProperty) {
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const propertyName = OHIFInstanceMetadata.getPropertyName(tagOrProperty);
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return (propertyName in this._instance || propertyName in this._series || propertyName in this._study);
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}
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// Override
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getImageId(frame) {
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// If _imageID is not cached, create it
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if (this._imageId === null) {
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this._imageId = Viewerbase.getImageId(this.getData(), frame);
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}
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return this._imageId;
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}
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/**
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* Static methods
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*/
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// @TODO: The current mapping of standard DICOM property names to local property names is not optimal.
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// The inconsistency in property naming makes this function increasingly complex.
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// A possible solution to improve this would be adapt retriveMetadata names to use DICOM standard names as in dicomTagDescriptions.js
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static getPropertyName(tagOrProperty) {
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let propertyName;
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const tagInfo = DICOMTagDescriptions.find(tagOrProperty);
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if (tagInfo !== void 0) {
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// This function tries to translate standard DICOM property names into local naming convention.
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propertyName = tagInfo.keyword.replace(/^SOP/, 'sop').replace(/UID$/, 'Uid').replace(/ID$/, 'Id');
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propertyName = propertyName.charAt(0).toLowerCase() + propertyName.substr(1);
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}
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return propertyName;
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}
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}
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