Hide URL preview if it will be empty

src/components/views/rooms/LinkPreviewGroup.tsx

@@ -97,7 +97,12 @@ const fetchPreviews = (cli: MatrixClient, links: string[], ts: number): Promise<
         links.map(async (link): Promise<[string, IPreviewUrlResponse] | undefined> => {
             try {
                 const preview = await cli.getUrlPreview(link, ts);
-                if (preview && Object.keys(preview).length > 0) {
+                // Ensure at least one of the rendered fields is truthy
+                if (
+                    preview?.["og:image"]?.startsWith("mxc://") ||
+                    !!preview?.["og:description"] ||
+                    !!preview?.["og:title"]
+                ) {
                     return [link, preview];
                 }
             } catch (error) {

src/components/views/rooms/LinkPreviewWidget.tsx

@@ -75,9 +75,6 @@ export default class LinkPreviewWidget extends React.Component<IProps> {
 
     public render(): React.ReactNode {
         const p = this.props.preview;
-        if (!p || Object.keys(p).length === 0) {
-            return <div />;
-        }
 
         // FIXME: do we want to factor out all image displaying between this and MImageBody - especially for lightboxing?
         let image: string | null = p["og:image"] ?? null;