PWV-1: Refactoring ohif:studylist package

Packages/ohif-study-list/client/lib/exportStudies.js

@@ -1,10 +1,13 @@
-var exportFailed;
+import { JSZip } from 'meteor/silentcicero:jszip';
+import { OHIF } from 'meteor/ohif:core';
+
+let exportFailed;
 
 /**
  * Exports requested studies
  * @param studiesToExport Studies to export
  */
-exportStudies = function(studiesToExport) {
+OHIF.studylist.exportStudies = studiesToExport => {
     if (studiesToExport.length < 1) {
         return;
     }
@@ -12,37 +15,45 @@ exportStudies = function(studiesToExport) {
     queryStudies(studiesToExport, exportQueriedStudies);
 };
 
-function exportQueriedStudies(studiesToExport) {
-    var numberOfFilesToExport = 0;
-    studiesToExport.forEach(function(study) {
+const exportQueriedStudies = studiesToExport => {
+    let numberOfFilesToExport = 0;
+    studiesToExport.forEach(study => {
         numberOfFilesToExport += getNumberOfFilesInStudy(study);
     });
 
-    progressDialog.show("Exporting Studies...", numberOfFilesToExport);
+    OHIF.studylist.progressDialog.show('Exporting Studies...', numberOfFilesToExport);
 
     try {
         exportQueriedStudiesInternal(studiesToExport, numberOfFilesToExport);
     } catch (err) {
-        progressDialog.close();
-        console.error("Failed to export studies: " + err.message);
+        OHIF.studylist.progressDialog.close();
+        OHIF.log.error(`Failed to export studies: ${err.message}`);
     }
-}
+};
 
-function exportQueriedStudiesInternal(studiesToExport, numberOfFilesToExport) {
-    var zip = new JSZip();
+const exportQueriedStudiesInternal = (studiesToExport, numberOfFilesToExport) => {
+    const zip = new JSZip();
 
     exportFailed = false;
-    var numberOfFilesExported = 0;
+    let numberOfFilesExported = 0;
 
-    studiesToExport.forEach(function(study) {
+    const onExportFailed = err => {
+        exportFailed = true;
+        OHIF.studylist.progressDialog.close();
+
+        //TODO: Export failed and dialog closed, so let user know
+        OHIF.log.error('Failed to export studies!', err);
+    };
+
+    studiesToExport.forEach(study => {
         sortStudy(study);
 
-        var studyFolder = zip.folder(study.studyInstanceUid);
+        const studyFolder = zip.folder(study.studyInstanceUid);
 
-        study.seriesList.forEach(function(series) {
-            var seriesFolder = studyFolder.folder(series.seriesInstanceUid);
+        study.seriesList.forEach(series => {
+            const seriesFolder = studyFolder.folder(series.seriesInstanceUid);
 
-            series.instances.forEach(function(instance) {
+            series.instances.forEach(instance => {
                 if (!instance.wadouri) {
                     return;
                 }
@@ -53,12 +64,12 @@ function exportQueriedStudiesInternal(studiesToExport, numberOfFilesToExport) {
                 }
 
                 //  Download and Zip the dicom file
-                var xhr = new XMLHttpRequest();
-                xhr.open("GET", instance.wadouri, true);
-                xhr.responseType = "blob";
+                const xhr = new XMLHttpRequest();
+                xhr.open('GET', instance.wadouri, true);
+                xhr.responseType = 'blob';
 
                 //  Downloaded the dicom file completely
-                xhr.onload = function(e) {
+                xhr.onload = () => {
                     //  If failed to download a dicom file, skip others
                     if (exportFailed) {
                         return;
@@ -66,17 +77,17 @@ function exportQueriedStudiesInternal(studiesToExport, numberOfFilesToExport) {
 
                     //  Failed to export a file
                     if (xhr.readyState === 4 && xhr.status !== 200) {
-                        onExportFailed("File not downloaded: " + instance.wadouri);
+                        onExportFailed(`File not downloaded: ${instance.wadouri}`);
                         return;
                     }
 
-                    var blobFile = new Blob([xhr.response], {type: 'application/dicom'});
+                    const blobFile = new Blob([xhr.response], { type: 'application/dicom' });
 
-                    var fileReader = new FileReader();
+                    const fileReader = new FileReader();
 
-                    fileReader.onload = function() {
+                    fileReader.onload = () => {
                         try {
-                            seriesFolder.file(instance.sopInstanceUid + ".dcm", fileReader.result, { binary: true });
+                            seriesFolder.file(`${instance.sopInstanceUid}.dcm`, fileReader.result, { binary: true });
                         } catch(err) {
                             onExportFailed(err.message);
                             return;
@@ -85,31 +96,21 @@ function exportQueriedStudiesInternal(studiesToExport, numberOfFilesToExport) {
                         numberOfFilesExported++;
 
                         if (numberOfFilesExported === numberOfFilesToExport) {
-                            var zipContent = zip.generate({ type: "blob" });
-                            saveAs(zipContent, "studies.zip");
+                            const zipContent = zip.generate({ type: 'blob' });
+                            saveAs(zipContent, 'studies.zip');
                         }
 
-                        progressDialog.update(numberOfFilesExported);
+                        OHIF.studylist.progressDialog.update(numberOfFilesExported);
                     };
 
                     fileReader.readAsArrayBuffer(blobFile);
                 };
 
                 //  Failed to download the dicom file
-                xhr.onerror = function() {
-                    onExportFailed("File not downloaded: " + instance.wadouri);
-                };
+                xhr.onerror = () => onExportFailed(`File not downloaded: ${instance.wadouri}`);
 
                 xhr.send();
             });
         });
     });
-}
-
-function onExportFailed(err) {
-    exportFailed = true;
-    progressDialog.close();
-
-    //TODO: Export failed and dialog closed, so let user know
-    console.error("Failed to export studies!", err);
-}
+};