Fixes for forms downloader

webprotege-gwt-ui-client/src/main/java/edu/stanford/bmir/protege/web/client/download/FetchAndOpenInBrowserWindow.java

@@ -0,0 +1,41 @@
+package edu.stanford.bmir.protege.web.client.download;
+
+import javax.annotation.Nonnull;
+
+/**
+ * Matthew Horridge
+ * Stanford Center for Biomedical Informatics Research
+ * 2024-06-14
+ */
+public class FetchAndOpenInBrowserWindow {
+
+    /**
+     * GET the specified path and open the result as a blob in a new window
+     * @param path The path
+     * @param token The access token to use.  This will be set in the authorization header.
+     */
+    public static native void fetchUrlAndOpenInWindow(@Nonnull String path,
+                                                      @Nonnull String token,
+                                                      @Nonnull FetchAndOpenInBrowserWindowErrorHandler errorHandler)/*-{
+        var xhr = new XMLHttpRequest();
+
+        xhr.open('GET', path);
+        xhr.onreadystatechange = handler;
+        xhr.responseType = 'blob';
+        xhr.setRequestHeader('Authorization', 'Bearer ' + token);
+        xhr.send();
+
+        function handler() {
+            if (this.readyState === this.DONE) {
+                if (this.status === 200) {
+                    // this.response is a Blob, because we set responseType above
+                    var data_url = URL.createObjectURL(this.response);
+                    $wnd.open(data_url, '_blank');
+                } else {
+                    console.error('Error');
+                    errorHandler.@edu.stanford.bmir.protege.web.client.download.FetchAndOpenInBrowserWindowErrorHandler::handleError(*)();
+                }
+            }
+        }
+    }-*/;
+}

webprotege-gwt-ui-client/src/main/java/edu/stanford/bmir/protege/web/client/download/FetchAndOpenInBrowserWindowErrorHandler.java

@@ -0,0 +1,11 @@
+package edu.stanford.bmir.protege.web.client.download;
+
+/**
+ * Matthew Horridge
+ * Stanford Center for Biomedical Informatics Research
+ * 2024-06-14
+ */
+public interface FetchAndOpenInBrowserWindowErrorHandler {
+
+    void handleError();
+}

webprotege-gwt-ui-client/src/main/java/edu/stanford/bmir/protege/web/client/form/FormsDownloader.java

@@ -1,7 +1,9 @@
 package edu.stanford.bmir.protege.web.client.form;
 
 import com.google.gwt.core.client.GWT;
-import com.google.gwt.user.client.Window;
+import edu.stanford.bmir.protege.web.client.dispatch.*;
+import edu.stanford.bmir.protege.web.client.download.FetchAndOpenInBrowserWindow;
+import edu.stanford.bmir.protege.web.shared.dispatch.actions.GetUserInfoAction;
 import edu.stanford.bmir.protege.web.shared.project.ProjectId;
 
 import javax.annotation.Nonnull;
@@ -19,14 +21,27 @@ public class FormsDownloader {
     @Nonnull
     private final ProjectId projectId;
 
+    private final DispatchServiceManager dispatch;
+
+    private final MessageBoxErrorDisplay errorDisplay;
+
     @Inject
-    public FormsDownloader(@Nonnull ProjectId projectId) {
+    public FormsDownloader(@Nonnull ProjectId projectId, DispatchServiceManager dispatch, MessageBoxErrorDisplay errorDisplay) {
         this.projectId = checkNotNull(projectId);
+        this.dispatch = checkNotNull(dispatch);
+        this.errorDisplay = checkNotNull(errorDisplay);
     }
 
     public void download() {
-        String baseURL = GWT.getHostPageBaseURL() + "data/";
-        String downloadURL = baseURL + "projects/" + projectId.getId() + "/forms";
-        Window.open(downloadURL, "Download forms", "");
+        dispatch.execute(new GetUserInfoAction(), result -> {
+            String baseURL = GWT.getHostPageBaseURL() + "data/";
+            String token = result.getToken();
+            FetchAndOpenInBrowserWindow.fetchUrlAndOpenInWindow("/data/projects/" + projectId.getId() + "/forms",
+                                                                token,
+                                                                () -> {
+                                                                    errorDisplay.displayGeneralErrorMessage("Download error",
+                                                                                                            "Could not download project forms");
+                                                                });
+        });
     }
 }