Add error handling for load from ext link

src/engine/lib/core/loaders/MRIFileLoader.ts

@@ -24,7 +24,7 @@ export class MRIFileLoader {
    * @param {string} url - The URL of the file to load.
    * @returns {Promise<File[]>} A promise that resolves to an array of Files or rejects with an error.
    */
-  async load(url: string): Promise<File[]> {
+  async load(url: string): Promise<File[] | null> {
     this.filesLoaded = 0;
     this.filesProgressByLength = false;
     this.store.setLoadingProgress(0);
@@ -52,15 +52,16 @@ export class MRIFileLoader {
    * @param {string} url - The URL from which to fetch the file.
    * @returns {Promise<File[]>} A promise that resolves to an array containing the fetched file as a File object.
    */
-  async fetchSingleFile(url: string): Promise<File[]> {
+  async fetchSingleFile(url: string): Promise<File[] | null> {
     const response = await this.fetchWithProgress(url, this.callbackLoadProgress);
 
     if (!response.ok) {
       this.handleVolumeLoadFailed(`Failed to fetch file from URL: ${url}`);
-      return [];
+      return null;
     }
 
     const blob = await response.blob();
+
     const fileName = getFileNameFromUrl(url);
     const file = new File([blob], fileName, {
       type: blob.type,
@@ -91,14 +92,15 @@ export class MRIFileLoader {
    * @param {string} txtUrl - The URL of the .txt file containing the list of file URLs.
    * @returns {Promise<File[]>} A promise that resolves to an array of File objects.
    */
-  async fetchTxtFile(txtUrl: string): Promise<File[]> {
+  async fetchTxtFile(txtUrl: string): Promise<File[] | null> {
     this.filesProgressByLength = true;
     const base = txtUrl.substring(0, txtUrl.lastIndexOf('/') + 1);
     const fileNames = await this.fetchTxtContent(txtUrl);
     this.filesLength = fileNames.length;
     const filePromises = fileNames.map((filename: string) => this.fetchSingleFile(base + filename));
     const files = await Promise.all(filePromises);
-    return files.flat();
+    const validFalies = files.filter(Boolean) as Array<File[]>;
+    return validFalies.flat();
   }
 
   /**
@@ -131,7 +133,9 @@ export class MRIFileLoader {
 
     const files = await Promise.all(filePromises);
 
-    return files.flat();
+    const validFalies = files.filter(Boolean) as Array<File[]>;
+
+    return validFalies.flat();
   }
 
   /**
@@ -154,6 +158,10 @@ export class MRIFileLoader {
       };
 
       xhr.onload = () => {
+        if (xhr.status === 403) {
+          return this.handleVolumeLoadFailed(`Error 403 Forbiden, failed to fetch file from URL: ${url}`);
+        }
+
         if (this.filesProgressByLength) {
           this.filesLoaded = this.filesLoaded + 1;
           const percentComplete = this.filesLoaded / this.filesLength;
@@ -166,7 +174,7 @@ export class MRIFileLoader {
 
       xhr.onerror = () => {
         this.handleVolumeLoadFailed(`Failed to fetch file from URL: ${url}`);
-        reject(new Error());
+        reject();
       };
 
       xhr.responseType = 'blob';
@@ -189,6 +197,6 @@ export class MRIFileLoader {
    */
   handleVolumeLoadFailed(error: string) {
     this.events.emit(MriEvents.FILE_READ_ERROR, { error });
-    this.store.setVolumeLoadFailed(this.fileName, [error]);
+    this.store.setVolumeLoadFailed(this.fileName);
   }
 }

src/engine/lib/core/readers/MRIReader.ts

@@ -10,8 +10,11 @@ export class MRIReader {
     if (data && data.length && data[0] instanceof File) {
       this.fileReader.read(data as File[]);
     } else if (isValidUrl(data as string)) {
-      const files: File[] = await this.fileLoader.load(data as string);
-      this.fileReader.read(files);
+      const files: File[] | null = await this.fileLoader.load(data as string);
+
+      if (files) {
+        this.fileReader.read(files);
+      }
     } else {
       throw new Error('Invalid input. Expected a File or URL.');
     }

src/engine/lib/core/readers/abstract-file-reader/AbstractFileReader.ts

@@ -75,7 +75,7 @@ export abstract class AbstractFileReader {
    */
   public handleVolumeReadFailed(error: string) {
     this.events.emit(MriEvents.FILE_READ_ERROR, { error });
-    this.store.setVolumeLoadFailed(this.fileName, [error]);
+    this.store.setVolumeLoadFailed(this.fileName);
   }
 
   /**

src/engine/lib/services/StoreService.ts

@@ -82,11 +82,10 @@ export class MRIStoreService {
     this.dispatchActions(actions);
   }
 
-  public setVolumeLoadFailed(fileName: string, errors: string[]): void {
+  public setVolumeLoadFailed(fileName: string): void {
     const actions = [
-      { type: StoreActionType.SET_ERR_ARRAY, errors },
       { type: StoreActionType.SET_VOLUME_SET, volume: null },
-      { type: StoreActionType.SET_FILENAME, fileName: fileName },
+      { type: StoreActionType.SET_FILENAME, fileName },
       { type: StoreActionType.SET_PROGRESS, progress: 0 },
       { type: StoreActionType.SET_SPINNER, spinner: false },
       { type: StoreActionType.SET_IS_LOADED, isLoaded: false },

src/ui/Main.jsx

@@ -8,7 +8,6 @@ import StoreActionType from '../store/ActionTypes';
 import FullScreenToggle from './Toolbars/FullScreen';
 import UiModalText from './Modals/UiModalText';
 import UiModalAlert from './Modals/ModalAlert';
-import UiErrConsole from './UiErrConsole';
 import ModeView from '../store/ViewMode';
 import Graphics2d from '../engine/Graphics2d';
 import BrowserDetector from '../engine/utils/BrowserDetector';
@@ -28,6 +27,9 @@ import { TopToolbar } from './TopToolbar/TopToolbar';
 import { UiAbout } from './Header/UiAbout';
 import { MobileSettings } from './MobileSettings/MobileSettings';
 import StartScreen from './StartScreen/StartScreen';
+import MriViwer from '../engine/lib/MRIViewer';
+import { MriEvents } from '../engine/lib/enums';
+
 import css from './Main.module.css';
 import cx from 'classnames';
 import '../nouislider-custom.css';
@@ -38,8 +40,9 @@ import UiModalConfirmation from './Modals/UiModalConfirmation';
 
 export const Main = () => {
   const dispatch = useDispatch();
-  const { arrErrors, isLoaded, progress, spinner, viewMode, showModalText, showModalAlert, showModalWindowCW, showModalConfirmation } =
-    useSelector((state) => state);
+  const { isLoaded, progress, spinner, viewMode, showModalText, showModalAlert, showModalWindowCW, showModalConfirmation } = useSelector(
+    (state) => state
+  );
 
   const [m_fileNameOnLoad, setM_fileNameOnLoad] = useState(false);
   const [isWebGl20supported, setIsWebGl20supported] = useState(true);
@@ -48,6 +51,7 @@ export const Main = () => {
   const [isFullMode, setIsFullMode] = useState(false);
   const [isMobile, setIsMobile] = useState(window.innerWidth <= 768);
   const appRef = useRef();
+  const mriViwer = useRef(MriViwer).current;
 
   useEffect(() => {
     function handleResize() {
@@ -60,6 +64,23 @@ export const Main = () => {
       window.removeEventListener('resize', handleResize);
     };
   }, []);
+
+  useEffect(() => {
+    const handleFileReadError = (eventData) => {
+      setStrAlertTitle('File Read Error');
+      setStrAlertText(eventData.error);
+      onShowModalAlert();
+    };
+
+    // Subscribe to the FILE_READ_ERROR event
+    mriViwer.events.on(MriEvents.FILE_READ_ERROR, handleFileReadError);
+
+    // Clean up
+    return () => {
+      mriViwer.events.off(MriEvents.FILE_READ_ERROR, handleFileReadError);
+    };
+  }, []);
+
   const [, drop] = useDrop(
     () => ({
       accept: DnDItemTypes.SETTINGS,
@@ -215,7 +236,6 @@ export const Main = () => {
               <MobileSettings />
             </div>
           )}
-          {arrErrors.length > 0 && <UiErrConsole />}
           {showModalText && (
             <UiModalText stateVis={showModalText} onHide={onHideModalText.bind(this)} onShow={onShowModalText.bind(this)} />
           )}