feat: display reaction emojis in notifications

src/components/Image/index.tsx

@@ -11,6 +11,7 @@ export default function Image({
   className = '',
   classNames = {},
   hideIfError = false,
+  errorPlaceholder = <ImageOff />,
   ...props
 }: HTMLAttributes<HTMLDivElement> & {
   classNames?: {
@@ -20,6 +21,7 @@ export default function Image({
   image: TImageInfo
   alt?: string
   hideIfError?: boolean
+  errorPlaceholder?: React.ReactNode
 }) {
   const [isLoading, setIsLoading] = useState(true)
   const [displayBlurHash, setDisplayBlurHash] = useState(true)
@@ -77,7 +79,7 @@ export default function Image({
             classNames.errorPlaceholder
           )}
         >
-          <ImageOff />
+          {errorPlaceholder}
         </div>
       )}
       {displayBlurHash && blurDataUrl && !hasError && (

src/components/NotificationList/NotificationItem/ReactionNotification.tsx

@@ -1,7 +1,8 @@
+import Image from '@/components/Image'
 import { PICTURE_EVENT_KIND } from '@/constants'
 import { useFetchEvent } from '@/hooks'
 import { toNote } from '@/lib/link'
-import { tagNameEquals } from '@/lib/tag'
+import { extractEmojiFromEventTags, tagNameEquals } from '@/lib/tag'
 import { cn } from '@/lib/utils'
 import { useSecondaryPage } from '@/PageManager'
 import { useNostr } from '@/providers/NostrProvider'
@@ -29,6 +30,29 @@ export function ReactionNotification({
     return eTag?.[1]
   }, [notification, pubkey])
   const { event } = useFetchEvent(eventId)
+  const reaction = useMemo(() => {
+    if (!notification.content || notification.content === '+') {
+      return <Heart size={24} className="text-red-400" />
+    }
+
+    const emojiName = /^:([^:]+):$/.exec(notification.content)?.[1]
+    if (emojiName) {
+      const emojiUrl = extractEmojiFromEventTags(emojiName, notification.tags)
+      if (emojiUrl) {
+        return (
+          <Image
+            image={{ url: emojiUrl }}
+            alt={emojiName}
+            className="w-6 h-6"
+            classNames={{ errorPlaceholder: 'bg-transparent' }}
+            errorPlaceholder={<Heart size={24} className="text-red-400" />}
+          />
+        )
+      }
+    }
+    return notification.content
+  }, [notification])
+
   if (!event || !eventId || ![kinds.ShortTextNote, PICTURE_EVENT_KIND].includes(event.kind)) {
     return null
   }
@@ -40,13 +64,7 @@ export function ReactionNotification({
     >
       <div className="flex gap-2 items-center flex-1">
         <UserAvatar userId={notification.pubkey} size="small" />
-        <div className="text-xl min-w-6 text-center">
-          {!notification.content || notification.content === '+' ? (
-            <Heart size={24} className="text-red-400" />
-          ) : (
-            notification.content
-          )}
-        </div>
+        <div className="text-xl min-w-6 text-center">{reaction}</div>
         <ContentPreview
           className={cn('truncate flex-1 w-0', isNew ? 'font-semibold' : 'text-muted-foreground')}
           event={event}

src/lib/tag.ts

@@ -66,6 +66,11 @@ export function extractPubkeysFromEventTags(tags: string[][]) {
   )
 }
 
+export function extractEmojiFromEventTags(emojiName: string, tags: string[][]) {
+  const emojiTag = tags.find((tag) => tag[0] === 'emoji' && tag[1] === emojiName)
+  return emojiTag?.[2]
+}
+
 export function isSameTag(tag1: string[], tag2: string[]) {
   if (tag1.length !== tag2.length) return false
   for (let i = 0; i < tag1.length; i++) {