Fix npe

web/packages/gallery/components/FileInfo.tsx

@@ -7,6 +7,7 @@ Plan of action:
   and photos/FileInfo to deal with the @/new/photos imports here.
 */
 
+import { assertionFailed } from "@/base/assert";
 import { LinkButtonUndecorated } from "@/base/components/LinkButton";
 import { type ButtonishProps } from "@/base/components/mui";
 import { ActivityIndicator } from "@/base/components/mui/ActivityIndicator";
@@ -225,6 +226,7 @@ export const FileInfo: React.FC<FileInfoProps> = ({
         onSelectPerson?.(personID);
 
     if (!file) {
+        if (open) assertionFailed();
         return <></>;
     }
 

web/packages/gallery/components/viewer/FileViewer.tsx

@@ -189,7 +189,7 @@ const FileViewer: React.FC<FileViewerProps> = ({
             <Button>Test</Button>
             <FileInfo
                 {...fileInfoVisibilityProps}
-                file={activeAnnotatedFile.file}
+                file={activeAnnotatedFile?.file}
                 exif={activeFileExif}
                 onSelectCollection={handleSelectCollection}
                 onSelectPerson={handleSelectPerson}

web/packages/gallery/components/viewer/photoswipe.ts

@@ -221,7 +221,7 @@ export class FileViewerPhotoSwipe {
                 // The above condition implies that annotation can never be
                 // undefined, but it doesn't seem to be enough to convince
                 // TypeScript. Writing the condition in a more unnatural way
-                // `(annotation && annotation?.fileID == file.id)` works, but
+                // `(!(annotation && annotation?.fileID == file.id))` works, but
                 // instead we use a non-null assertion here.
                 annotation: annotation!,
             };
@@ -231,7 +231,7 @@ export class FileViewerPhotoSwipe {
 
         const withCurrentAnnotatedFile =
             (cb: (af: AnnotatedFile) => void) => () =>
-                cb(currentFileAnnotation());
+                cb(currentAnnotatedFile());
 
         // Provide data about slides to PhotoSwipe via callbacks
         // https://photoswipe.com/data-sources/#dynamically-generated-data