LT-66 Import DICOM Studies

- Add a toolbar in the top of worklist
- Add Import button in the worklist toolbar
- Upload all files in the selected folder to import from client to server
- Import uploaded files via DIMSE
- Delete uploaded files from server when import is completed
- Handle import status in client
- Show/Update progress dialog in client while uploading and importing files
- Show Import button only if import is supported for the default service type (DICOMWeb is currently not supported)

Packages/viewerbase/lib/importStudies.js

@@ -0,0 +1,107 @@
+/**
+ * Imports selected studies from local into worklist
+ * @param filesToImport Files located in the client machine to import
+ */
+importStudies = function(filesToImport, importCallback) {
+    if (filesToImport.length < 1) {
+        return;
+    }
+    var fileUploadStatus = { numberOfFilesUploaded: 0, numberOfFilesFailed: 0 };
+
+    var numberOfFilesToUpload = filesToImport.length;
+    var studiesToImport = [];
+
+    progressDialog.show("Uploading Files...", numberOfFilesToUpload);
+
+    //  Upload files to the server
+    filesToImport.forEach(function(fileToUpload) {
+        var xhr = new XMLHttpRequest();
+        xhr.open('POST', "/uploadFilesToImport", true);
+        xhr.setRequestHeader("filename", fileToUpload.name);
+
+        xhr.onload = function() {
+            //  Failed to upload a file
+            if (xhr.readyState === 4 && xhr.status !== 200) {
+                updateFileUploadStatus(fileUploadStatus, false);
+                return;
+            }
+
+            studiesToImport.push(xhr.responseText);
+
+            updateFileUploadStatus(fileUploadStatus, true);
+
+            var numberOfFilesProcessedToUpload = fileUploadStatus.numberOfFilesUploaded + fileUploadStatus.numberOfFilesFailed;
+            progressDialog.update(numberOfFilesProcessedToUpload);
+
+            if (numberOfFilesToUpload === numberOfFilesProcessedToUpload) {
+                //  The upload is completed, so import files
+                importStudiesInternal(studiesToImport, importCallback);
+
+                if (fileUploadStatus.numberOfFilesFailed > 0) {
+                    //TODO: Some files failed to upload, so let user know
+                    console.log("Failed to upload " + studyImportStatus.numberOfStudiesFailed + " of " + numberOfStudiesToImport + " files");
+                }
+            }
+        };
+
+        //  Failed to upload a file
+        xhr.onerror = function() {
+            updateFileUploadStatus(fileUploadStatus, false);
+        };
+
+        xhr.send(fileToUpload);
+    });
+};
+
+function updateFileUploadStatus(fileUploadStatus, isSuccess) {
+    if (!isSuccess) {
+        fileUploadStatus.numberOfFilesFailed++;
+    } else {
+        fileUploadStatus.numberOfFilesUploaded++;
+    }
+}
+
+function importStudiesInternal(studiesToImport, importCallback) {
+    var numberOfStudiesToImport = studiesToImport.length;
+
+    progressDialog.show("Importing Studies...", numberOfStudiesToImport);
+
+    //  Create/Insert a new study import status item
+    Meteor.call("createStudyImportStatus", function(err, studyImportStatusId) {
+        if (err) {
+            console.log(err);
+            return;
+        }
+
+        //  Handle when it is updated
+        StudyImportStatus.find(studyImportStatusId).observe({
+            changed: function(studyImportStatus) {
+                if (!studyImportStatus) {
+                    return;
+                }
+
+                var numberOfStudiesProcessedToImport = studyImportStatus.numberOfStudiesImported + studyImportStatus.numberOfStudiesFailed;
+
+                progressDialog.update(numberOfStudiesProcessedToImport);
+
+                if (numberOfStudiesProcessedToImport == numberOfStudiesToImport) {
+                    //  The entire import operation is completed, so remove the study import status item
+                    Meteor.call("removeStudyImportStatus", studyImportStatus._id);
+
+                    if (studyImportStatus.numberOfStudiesFailed > 0) {
+                        //TODO: Some files failed to import, so let user know
+                        console.log("Failed to import " + studyImportStatus.numberOfStudiesFailed + " of " + numberOfStudiesToImport + " files");
+                    }
+
+                    //  Let the caller know that import operation is completed
+                    if (importCallback) {
+                        importCallback();
+                    }
+                }
+            }
+        });
+
+        //  Import studies with study import status id to get callbacks
+        Meteor.call("importStudies", studiesToImport, studyImportStatusId);
+    });
+}