Add support to mark videos as spoilers (#2255)

* Add support for MSC4193: Spoilers on Media

* Clarify variable names and wording

* Restore list atom

* Improve spoilered image UX with autoload off

* Use `aria-pressed` to indicate attachment spoiler state

* Improve spoiler button tooltip wording, keep reveal button from conflicting with load errors

* Make it possible to mark videos as spoilers

* Allow videos to be marked as spoilers when uploaded

* Apply requested changes

* Show a loading spinner on spoiled media when unblurred

---------

Co-authored-by: Ajay Bura <32841439+ajbura@users.noreply.github.com>

src/app/components/upload-card/UploadCardRenderer.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect } from 'react';
+import React, { ReactNode, useEffect } from 'react';
 import { Box, Chip, Icon, IconButton, Icons, Text, color, config, toRem } from 'folds';
 import { UploadCard, UploadCardError, UploadCardProgress } from './UploadCard';
 import { UploadStatus, UploadSuccess, useBindUploadAtom } from '../../state/upload';
@@ -13,8 +13,54 @@ import {
 import { useObjectURL } from '../../hooks/useObjectURL';
 import { useMediaConfig } from '../../hooks/useMediaConfig';
 
-type ImagePreviewProps = { fileItem: TUploadItem; onSpoiler: (marked: boolean) => void };
-function ImagePreview({ fileItem, onSpoiler }: ImagePreviewProps) {
+type PreviewImageProps = {
+  fileItem: TUploadItem;
+};
+function PreviewImage({ fileItem }: PreviewImageProps) {
+  const { originalFile, metadata } = fileItem;
+  const fileUrl = useObjectURL(originalFile);
+
+  return (
+    <img
+      style={{
+        objectFit: 'contain',
+        width: '100%',
+        height: toRem(152),
+        filter: metadata.markedAsSpoiler ? 'blur(44px)' : undefined,
+      }}
+      alt={originalFile.name}
+      src={fileUrl}
+    />
+  );
+}
+
+type PreviewVideoProps = {
+  fileItem: TUploadItem;
+};
+function PreviewVideo({ fileItem }: PreviewVideoProps) {
+  const { originalFile, metadata } = fileItem;
+  const fileUrl = useObjectURL(originalFile);
+
+  return (
+    // eslint-disable-next-line jsx-a11y/media-has-caption
+    <video
+      style={{
+        objectFit: 'contain',
+        width: '100%',
+        height: toRem(152),
+        filter: metadata.markedAsSpoiler ? 'blur(44px)' : undefined,
+      }}
+      src={fileUrl}
+    />
+  );
+}
+
+type MediaPreviewProps = {
+  fileItem: TUploadItem;
+  onSpoiler: (marked: boolean) => void;
+  children: ReactNode;
+};
+function MediaPreview({ fileItem, onSpoiler, children }: MediaPreviewProps) {
   const { originalFile, metadata } = fileItem;
   const fileUrl = useObjectURL(originalFile);
 
@@ -27,16 +73,7 @@ function ImagePreview({ fileItem, onSpoiler }: ImagePreviewProps) {
         position: 'relative',
       }}
     >
-      <img
-        style={{
-          objectFit: 'contain',
-          width: '100%',
-          height: toRem(152),
-          filter: fileItem.metadata.markedAsSpoiler ? 'blur(44px)' : undefined,
-        }}
-        src={fileUrl}
-        alt={originalFile.name}
-      />
+      {children}
       <Box
         justifyContent="End"
         style={{
@@ -136,7 +173,14 @@ export function UploadCardRenderer({
       bottom={
         <>
           {fileItem.originalFile.type.startsWith('image') && (
-            <ImagePreview fileItem={fileItem} onSpoiler={handleSpoiler} />
+            <MediaPreview fileItem={fileItem} onSpoiler={handleSpoiler}>
+              <PreviewImage fileItem={fileItem} />
+            </MediaPreview>
+          )}
+          {fileItem.originalFile.type.startsWith('video') && (
+            <MediaPreview fileItem={fileItem} onSpoiler={handleSpoiler}>
+              <PreviewVideo fileItem={fileItem} />
+            </MediaPreview>
           )}
           {upload.status === UploadStatus.Idle && !fileSizeExceeded && (
             <UploadCardProgress sentBytes={0} totalBytes={file.size} />