OHIF-26: StudyLoadingListener :: wadouri

Packages/ohif-viewerbase/client/lib/studyLoadingListener.js

@@ -19,6 +19,14 @@ class BaseLoadingListener {
     delete Session.keys.progressSessionId;
   }
 
+  startListening() {
+    throw new Error('`startListening` must be implemented by child clases');
+  }
+
+  stopListening() {
+    throw new Error('`stopListening` must be implemented by child clases');
+  }
+
   destroy() {
     this.stopListening();
     this._clearSession();
@@ -26,7 +34,7 @@ class BaseLoadingListener {
 
   static getNewId() {
     const timeSlice = (new Date()).getTime().toString().slice(-8);
-    const randomNumber = parseInt(Math.random() * 1000000000000);
+    const randomNumber = parseInt(Math.random() * 1000000000);
 
     return timeSlice.toString() + randomNumber.toString();
   }
@@ -35,6 +43,69 @@ class BaseLoadingListener {
 class DICOMFileLoadingListener extends BaseLoadingListener {
   constructor(stack) {
     super(stack);
+    this.dataSetUrls = this._getDataSetUrls(stack);
+  }
+
+  _getImageLoadProgressEventName() {
+    return 'CornerstoneImageLoadProgress.' + this.id;
+  }
+
+  startListening() {
+    const imageLoadProgressEventName = this._getImageLoadProgressEventName();
+
+    this.stopListening();
+
+    $(cornerstone).on(imageLoadProgressEventName, (e, eventData) => {
+      this._imageLoadProgressEventHandle(e, eventData);
+    });
+  }
+
+  stopListening() {
+    const imageLoadProgressEventName = this._getImageLoadProgressEventName();
+    $(cornerstone).off(imageLoadProgressEventName);
+  }
+
+  _imageLoadProgressEventHandle(e, eventData) {
+    var dataSetUrl = this._getDataSetUrl(eventData.imageId);
+
+    if (!this.dataSetUrls.has(dataSetUrl)) {
+      return;
+    }
+
+    this._triggerProgress(eventData);
+  }
+
+  _triggerProgress(eventData) {
+    const progressSessionId = this._getProgressSessionId();
+
+    Session.set(progressSessionId, {
+      percentComplete: eventData.percentComplete,
+      bytesLoaded: eventData.loaded,
+      bytesTotal: eventData.total
+    });
+  }
+
+  _getDataSetUrl(imageId) {
+    // Remove "frame=999&" from the imageId
+    imageId = imageId.replace(/frame=\d+&?/i, '');
+
+    // Remove the last "&" like in "dicomweb:...&serverId=GQGpJcb4CnYDdu53q&"
+    imageId = imageId.replace(/&$/, "");
+
+    return imageId;
+  }
+
+  _getDataSetUrls(stack) {
+    const dataSetUrls = new Set();
+    const imageIds = stack.imageIds;
+    const length = stack.imageIds.length;
+
+    for (let i = 0; i < length; i++) {
+      const dataSetUrl = this._getDataSetUrl(imageIds[i]);
+      dataSetUrls.add(dataSetUrl);
+    }
+
+    return dataSetUrls;
   }
 }
 
@@ -45,17 +116,17 @@ class StackLoadingListener extends BaseLoadingListener {
     this.loadedImageIds = [];
   }
 
-  getImageLoadedEventName() {
+  _getImageLoadedEventName() {
     return 'CornerstoneImageLoaded.' + this.id;
   }
 
-  getImageCachePromiseRemoveEventName() {
+  _getImageCachePromiseRemoveEventName() {
     return 'CornerstoneImageCachePromiseRemoved.' + this.id;
   }
 
   startListening() {
-    const imageLoadedEventName = this.getImageLoadedEventName();
+    const imageLoadedEventName = this._getImageLoadedEventName();
-    const imageCachePromiseRemovedEventName = this.getImageCachePromiseRemoveEventName();
+    const imageCachePromiseRemovedEventName = this._getImageCachePromiseRemoveEventName();
 
     this.stopListening();
 
@@ -69,17 +140,13 @@ class StackLoadingListener extends BaseLoadingListener {
   }
 
   stopListening() {
-    const imageLoadedEventName = this.getImageLoadedEventName();
+    const imageLoadedEventName = this._getImageLoadedEventName();
-    const imageCachePromiseRemovedEventName = this.getImageCachePromiseRemoveEventName();
+    const imageCachePromiseRemovedEventName = this._getImageCachePromiseRemoveEventName();
 
     $(cornerstone).off(imageLoadedEventName);
     $(cornerstone).off(imageCachePromiseRemovedEventName);
   }
 
-  _hasImageId(imageId) {
-    return this.stack.imageIds.indexOf(imageId) !== -1;
-  }
-
   _moveImageId(imageId, srcImageIds, dstImageIds) {
     const imageIdIndex = srcImageIds.indexOf(imageId);
 
@@ -106,7 +173,7 @@ class StackLoadingListener extends BaseLoadingListener {
     const loadedImagesCount = this.loadedImageIds.length;
     const remainingImagesCount = this.remainingImageIds.length;
     const totalImagesCount = loadedImagesCount + remainingImagesCount;
-    const percentComplete = loadedImagesCount / (totalImagesCount);
+    const percentComplete = Math.round(loadedImagesCount / totalImagesCount * 100);
     const progressSessionId = this._getProgressSessionId();
 
     Session.set(progressSessionId, {
@@ -123,11 +190,11 @@ class StudyLoadingListener {
     this.listeners = {};
   }
 
-  addStack(stack) {
+  addStack(stack, options) {
     const displaySetInstanceUid = stack.displaySetInstanceUid;
 
     if (!this.listeners[displaySetInstanceUid]) {
-      listener = this._createListener(stack);
+      listener = this._createListener(stack, options);
       if (listener) {
         this.listeners[displaySetInstanceUid] = listener;
       }
@@ -137,7 +204,9 @@ class StudyLoadingListener {
   addStudy(study) {
     study.displaySets.forEach(displaySet => {
       const stack = OHIF.viewerbase.stackManager.findOrCreateStack(study, displaySet);
-      this.addStack(stack);
+      this.addStack(stack, {
+        isMultiFrame: displaySet.isMultiFrame
+      });
     });
   }
 
@@ -161,14 +230,16 @@ class StudyLoadingListener {
       displaySet.destroy();
     }
 
-    this.listener = {};
+    this.listeners = {};
   }
 
-  _createListener(stack) {
+  _createListener(stack, options) {
     const schema = this._getSchema(stack);
 
-    if(schema === 'wadors') {
+    if ((schema === 'wadors') || !options.isMultiFrame) {
-      return new StackLoadingListener(stack);
+      return new StackLoadingListener(stack)
+    } else if ((schema === 'dicomweb') || (schema === 'wadouri')) {
+      return new DICOMFileLoadingListener(stack);
     }
   }
 
@@ -179,6 +250,7 @@ class StudyLoadingListener {
   }
 }
 
+// Singleton
 const studyLoadingListener = new StudyLoadingListener();
 
 export { studyLoadingListener };