feat: support NIP-30 custom emojis in bio and display name (#660)

src/components/PostEditor/PostTextarea/Mention/MentionNode.tsx

@@ -1,3 +1,4 @@
+import TextWithEmojis from '@/components/TextWithEmojis'
 import { useFetchProfile } from '@/hooks'
 import { formatUserId } from '@/lib/pubkey'
 import { cn } from '@/lib/utils'
@@ -11,7 +12,11 @@ export default function MentionNode(props: NodeViewRendererProps & { selected: b
       className={cn('inline text-primary', props.selected ? 'bg-primary/20 rounded-sm' : '')}
     >
       {'@'}
-      {profile ? profile.username : formatUserId(props.node.attrs.id)}
+      {profile ? (
+        <TextWithEmojis text={profile.username} emojis={profile.emojis} emojiClassName="mb-1" />
+      ) : (
+        formatUserId(props.node.attrs.id)
+      )}
     </NodeViewWrapper>
   )
 }

src/components/Profile/index.tsx

@@ -109,7 +109,7 @@ export default function Profile({ id }: { id?: string }) {
   }
   if (!profile) return <NotFound />
 
-  const { banner, username, about, pubkey, website, lightningAddress } = profile
+  const { banner, username, about, pubkey, website, lightningAddress, emojis } = profile
   return (
     <>
       <div ref={topContainerRef}>
@@ -161,6 +161,7 @@ export default function Profile({ id }: { id?: string }) {
             <Collapsible>
               <ProfileAbout
                 about={about}
+                emojis={emojis}
                 className="text-wrap break-words whitespace-pre-wrap mt-2 select-text"
               />
             </Collapsible>

src/components/ProfileAbout/index.tsx

@@ -1,4 +1,5 @@
 import {
+  EmbeddedEmojiParser,
   EmbeddedHashtagParser,
   EmbeddedMentionParser,
   EmbeddedUrlParser,
@@ -7,13 +8,23 @@ import {
 } from '@/lib/content-parser'
 import { detectLanguage } from '@/lib/utils'
 import { useTranslationService } from '@/providers/TranslationServiceProvider'
+import { TEmoji } from '@/types'
 import { useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { toast } from 'sonner'
 import { EmbeddedHashtag, EmbeddedMention, EmbeddedWebsocketUrl } from '../Embedded'
+import Emoji from '../Emoji'
 import ExternalLink from '../ExternalLink'
 
-export default function ProfileAbout({ about, className }: { about?: string; className?: string }) {
+export default function ProfileAbout({
+  about,
+  emojis,
+  className
+}: {
+  about?: string
+  emojis?: TEmoji[]
+  className?: string
+}) {
   const { t, i18n } = useTranslation()
   const { translateText } = useTranslationService()
   const needTranslation = useMemo(() => {
@@ -31,8 +42,16 @@ export default function ProfileAbout({ about, className }: { about?: string; cla
       EmbeddedMentionParser,
       EmbeddedWebsocketUrlParser,
       EmbeddedUrlParser,
-      EmbeddedHashtagParser
+      EmbeddedHashtagParser,
+      EmbeddedEmojiParser
     ])
+
+    // Create emoji map for quick lookup
+    const emojiMap = new Map<string, TEmoji>()
+    emojis?.forEach((emoji) => {
+      emojiMap.set(emoji.shortcode, emoji)
+    })
+
     return nodes.map((node, index) => {
       if (node.type === 'url') {
         return <ExternalLink key={index} url={node.data} />
@@ -46,9 +65,15 @@ export default function ProfileAbout({ about, className }: { about?: string; cla
       if (node.type === 'mention') {
         return <EmbeddedMention key={index} userId={node.data.split(':')[1]} />
       }
+      if (node.type === 'emoji') {
+        const shortcode = node.data.split(':')[1]
+        const emoji = emojiMap.get(shortcode)
+        if (!emoji) return node.data
+        return <Emoji classNames={{ img: 'mb-1' }} emoji={emoji} key={index} />
+      }
       return node.data
     })
-  }, [about, translatedAbout])
+  }, [about, translatedAbout, emojis])
 
   const handleTranslate = async () => {
     if (translating || translatedAbout) return

src/components/ProfileCard/index.tsx

@@ -9,7 +9,7 @@ import { SimpleUserAvatar } from '../UserAvatar'
 export default function ProfileCard({ userId }: { userId: string }) {
   const pubkey = useMemo(() => userIdToPubkey(userId), [userId])
   const { profile } = useFetchProfile(userId)
-  const { username, about } = profile || {}
+  const { username, about, emojis } = profile || {}
 
   return (
     <div className="w-full flex flex-col gap-2 not-prose">
@@ -24,6 +24,7 @@ export default function ProfileCard({ userId }: { userId: string }) {
       {about && (
         <ProfileAbout
           about={about}
+          emojis={emojis}
           className="text-sm text-wrap break-words w-full overflow-hidden text-ellipsis line-clamp-6"
         />
       )}

src/components/TextWithEmojis/index.tsx

@@ -0,0 +1,55 @@
+import { EmbeddedEmojiParser, parseContent } from '@/lib/content-parser'
+import { TEmoji } from '@/types'
+import { useMemo } from 'react'
+import Emoji from '../Emoji'
+
+/**
+ * Component that renders text with custom emojis replaced by emoji images
+ * According to NIP-30, custom emojis are defined in emoji tags and referenced as :shortcode: in text
+ */
+export default function TextWithEmojis({
+  text,
+  emojis,
+  className,
+  emojiClassName
+}: {
+  text: string
+  emojis?: TEmoji[]
+  className?: string
+  emojiClassName?: string
+}) {
+  const nodes = useMemo(() => {
+    if (!emojis || emojis.length === 0) {
+      return [{ type: 'text' as const, data: text }]
+    }
+
+    // Use the existing content parser infrastructure
+    return parseContent(text, [EmbeddedEmojiParser])
+  }, [text, emojis])
+
+  // Create emoji map for quick lookup
+  const emojiMap = useMemo(() => {
+    const map = new Map<string, TEmoji>()
+    emojis?.forEach((emoji) => {
+      map.set(emoji.shortcode, emoji)
+    })
+    return map
+  }, [emojis])
+
+  return (
+    <span className={className}>
+      {nodes.map((node, index) => {
+        if (node.type === 'text') {
+          return node.data
+        }
+        if (node.type === 'emoji') {
+          const shortcode = node.data.split(':')[1]
+          const emoji = emojiMap.get(shortcode)
+          if (!emoji) return node.data
+          return <Emoji key={index} emoji={emoji} classNames={{ img: emojiClassName }} />
+        }
+        return null
+      })}
+    </span>
+  )
+}

src/components/Username/index.tsx

@@ -5,6 +5,7 @@ import { toProfile } from '@/lib/link'
 import { cn } from '@/lib/utils'
 import { SecondaryPageLink } from '@/PageManager'
 import ProfileCard from '../ProfileCard'
+import TextWithEmojis from '../TextWithEmojis'
 
 export default function Username({
   userId,
@@ -39,7 +40,7 @@ export default function Username({
             onClick={(e) => e.stopPropagation()}
           >
             {showAt && '@'}
-            {profile.username}
+            <TextWithEmojis text={profile.username} emojis={profile.emojis} emojiClassName="mb-1" />
           </SecondaryPageLink>
         </div>
       </HoverCardTrigger>
@@ -73,12 +74,12 @@ export function SimpleUsername({
   }
   if (!profile) return null
 
-  const { username } = profile
+  const { username, emojis } = profile
 
   return (
     <div className={className}>
       {showAt && '@'}
-      {username}
+      <TextWithEmojis text={username} emojis={emojis} emojiClassName="mb-1" />
     </div>
   )
 }

src/lib/event-metadata.ts

@@ -5,7 +5,7 @@ import { buildATag } from './draft-event'
 import { getReplaceableEventIdentifier } from './event'
 import { getAmountFromInvoice, getLightningAddressFromProfile } from './lightning'
 import { formatPubkey, pubkeyToNpub } from './pubkey'
-import { generateBech32IdFromETag, tagNameEquals } from './tag'
+import { getEmojiInfosFromEmojiTags, generateBech32IdFromETag, tagNameEquals } from './tag'
 import { isWebsocketUrl, normalizeHttpUrl, normalizeUrl } from './url'
 import { isTorBrowser } from './utils'
 
@@ -54,6 +54,10 @@ export function getProfileFromEvent(event: Event) {
       profileObj.display_name?.trim() ||
       profileObj.name?.trim() ||
       profileObj.nip05?.split('@')[0]?.trim()
+
+    // Extract emojis from emoji tags according to NIP-30
+    const emojis = getEmojiInfosFromEmojiTags(event.tags)
+
     return {
       pubkey: event.pubkey,
       npub: pubkeyToNpub(event.pubkey) ?? '',
@@ -67,7 +71,8 @@ export function getProfileFromEvent(event: Event) {
       lud06: profileObj.lud06,
       lud16: profileObj.lud16,
       lightningAddress: getLightningAddressFromProfile(profileObj),
-      created_at: event.created_at
+      created_at: event.created_at,
+      emojis: emojis.length > 0 ? emojis : undefined
     }
   } catch (err) {
     console.error(event.content, err)

src/types/index.d.ts

@@ -22,6 +22,7 @@ export type TProfile = {
   lud16?: string
   lightningAddress?: string
   created_at?: number
+  emojis?: TEmoji[]
 }
 export type TMailboxRelayScope = 'read' | 'write' | 'both'
 export type TMailboxRelay = {