render longform in feeds and embedding

src/components/ContentPreview/LongFormArticlePreview.tsx

@@ -1,22 +0,0 @@
-import { getLongFormArticleMetadataFromEvent } from '@/lib/event-metadata'
-import { cn } from '@/lib/utils'
-import { Event } from 'nostr-tools'
-import { useMemo } from 'react'
-import { useTranslation } from 'react-i18next'
-
-export default function LongFormArticlePreview({
-  event,
-  className
-}: {
-  event: Event
-  className?: string
-}) {
-  const { t } = useTranslation()
-  const metadata = useMemo(() => getLongFormArticleMetadataFromEvent(event), [event])
-
-  return (
-    <div className={cn('pointer-events-none', className)}>
-      [{t('Article')}] <span className="italic pr-0.5">{metadata.title}</span>
-    </div>
-  )
-}

src/components/ContentPreview/index.tsx

@@ -22,7 +22,7 @@ import CommunityDefinitionPreview from './CommunityDefinitionPreview'
 import GroupMetadataPreview from './GroupMetadataPreview'
 import HighlightPreview from './HighlightPreview'
 import LiveEventPreview from './LiveEventPreview'
-import LongFormArticlePreview from './LongFormArticlePreview'
+import LongFormCard from '../Note/LongFormCard'
 import NormalContentPreview from './NormalContentPreview'
 import PictureNotePreview from './PictureNotePreview'
 import PollPreview from './PollPreview'
@@ -181,7 +181,7 @@ export default function ContentPreview({
   }
 
   if (event.kind === kinds.LongFormArticle) {
-    return withKindRow(<LongFormArticlePreview event={previewEvent} />)
+    return withKindRow(<LongFormCard event={previewEvent} interactive={false} />)
   }
 
   if (isNip71StyleVideoKind(event.kind)) {

src/components/Note/LongFormCard.tsx

@@ -0,0 +1,136 @@
+import { cardEventBodyBlurb } from '@/lib/card-event-body-blurb'
+import { getLongFormArticleMetadataFromEvent } from '@/lib/event-metadata'
+import { toNote, toNoteList } from '@/lib/link'
+import { useSecondaryPageOptional } from '@/PageManager'
+import { useContentPolicyOptional } from '@/providers/ContentPolicyProvider'
+import { useScreenSizeOptional } from '@/providers/ScreenSizeProvider'
+import { cn } from '@/lib/utils'
+import { Event, kinds } from 'nostr-tools'
+import { useMemo } from 'react'
+import { useTranslation } from 'react-i18next'
+import Image from '../Image'
+
+/**
+ * Feed / embed / preview surface for NIP-23 long-form (kind 30023): title, summary, image, tags — no “Show more” body.
+ * Full article stays on the note page ({@link showFull} on {@link Note}).
+ */
+export default function LongFormCard({
+  event,
+  className,
+  /** When false (e.g. parent-reply preview strip), card is non-interactive like the old one-line preview. */
+  interactive = true
+}: {
+  event: Event
+  className?: string
+  interactive?: boolean
+}) {
+  const { t } = useTranslation()
+  const screenSize = useScreenSizeOptional()
+  const isSmallScreen = screenSize?.isSmallScreen ?? false
+  const secondaryPage = useSecondaryPageOptional()
+  const push = secondaryPage?.push ?? ((url: string) => {
+    window.location.href = url
+  })
+  const contentPolicy = useContentPolicyOptional()
+  const autoLoadMedia = contentPolicy?.autoLoadMedia ?? true
+  const metadata = useMemo(() => getLongFormArticleMetadataFromEvent(event), [event])
+  const bodyBlurb = useMemo(() => cardEventBodyBlurb(event.content), [event.content])
+  const summaryText = (metadata.summary?.trim() || bodyBlurb).trim()
+
+  const displayTitle = metadata.title?.trim() || t('Long-form Article')
+
+  const handleCardClick = (e: React.MouseEvent) => {
+    if (!interactive) return
+    e.stopPropagation()
+    push(toNote(event.id))
+  }
+
+  const titleComponent = (
+    <div className="min-w-0 text-xl font-semibold break-words sm:line-clamp-2">{displayTitle}</div>
+  )
+
+  const tagsComponent = interactive && metadata.tags.length > 0 && (
+    <div className="flex flex-wrap gap-1">
+      {metadata.tags.map((tag) => (
+        <div
+          key={tag}
+          className="flex max-w-32 cursor-pointer items-center rounded-full bg-muted px-2.5 py-0.5 text-xs text-muted-foreground hover:bg-accent hover:text-accent-foreground"
+          onClick={(e) => {
+            e.stopPropagation()
+            push(toNoteList({ hashtag: tag, kinds: [kinds.LongFormArticle] }))
+          }}
+        >
+          #<span className="truncate">{tag}</span>
+        </div>
+      ))}
+    </div>
+  )
+
+  const tagsReadonly = !interactive && metadata.tags.length > 0 && (
+    <div className="flex flex-wrap gap-1">
+      {metadata.tags.map((tag) => (
+        <span
+          key={tag}
+          className="flex max-w-32 items-center rounded-full bg-muted px-2.5 py-0.5 text-xs text-muted-foreground"
+        >
+          #<span className="truncate">{tag}</span>
+        </span>
+      ))}
+    </div>
+  )
+
+  const summaryComponent = summaryText ? (
+    <div className="text-base text-muted-foreground line-clamp-4 break-words">{summaryText}</div>
+  ) : null
+
+  const shellClass = cn(className, !interactive && 'pointer-events-none')
+  const cardClass = cn(
+    'rounded-lg border p-4 transition-colors',
+    interactive && 'cursor-pointer hover:bg-muted/50'
+  )
+
+  if (isSmallScreen) {
+    return (
+      <div className={shellClass}>
+        <div className={cardClass} onClick={interactive ? handleCardClick : undefined}>
+          {metadata.image && autoLoadMedia && (
+            <Image
+              image={{ url: metadata.image, pubkey: event.pubkey }}
+              className="mb-3 aspect-video w-full max-w-[400px]"
+              hideIfError
+            />
+          )}
+          <div className="space-y-2">
+            {titleComponent}
+            {summaryComponent}
+            {tagsComponent}
+            {tagsReadonly}
+          </div>
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className={cn('w-full min-w-0', shellClass)}>
+      <div className={cn(cardClass, 'min-w-0')} onClick={interactive ? handleCardClick : undefined}>
+        <div className="flex min-w-0 gap-4">
+          {metadata.image && autoLoadMedia && (
+            <Image
+              image={{ url: metadata.image, pubkey: event.pubkey }}
+              classNames={{ wrapper: 'w-auto max-w-[400px] shrink-0' }}
+              className="h-44 max-w-[400px] shrink rounded-lg bg-foreground object-cover aspect-[4/3] xl:aspect-video"
+              hideIfError
+            />
+          )}
+          <div className="min-w-0 flex-1 basis-0 space-y-2 overflow-hidden">
+            {titleComponent}
+            {summaryComponent}
+            {tagsComponent}
+            {tagsReadonly}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}

src/components/Note/PublicationCard.tsx

@@ -1,3 +1,4 @@
+import { cardEventBodyBlurb } from '@/lib/card-event-body-blurb'
 import { getLongFormArticleMetadataFromEvent } from '@/lib/event-metadata'
 import { toNote, toNoteList } from '@/lib/link'
 import { cn } from '@/lib/utils'
@@ -24,6 +25,8 @@ export default function PublicationCard({
   const contentPolicy = useContentPolicyOptional()
   const autoLoadMedia = contentPolicy?.autoLoadMedia ?? true
   const metadata = useMemo(() => getLongFormArticleMetadataFromEvent(event), [event])
+  const bodyBlurb = useMemo(() => cardEventBodyBlurb(event.content), [event.content])
+  const summaryText = (metadata.summary?.trim() || bodyBlurb).trim()
   const bookMetadata = useMemo(() => extractBookMetadata(event), [event])
   const isBookstrEvent = (event.kind === ExtendedKind.PUBLICATION || event.kind === ExtendedKind.PUBLICATION_CONTENT) && !!bookMetadata.book
 
@@ -69,11 +72,11 @@ export default function PublicationCard({
     </div>
   )
 
-  const summaryComponent = metadata.summary && (
+  const summaryComponent = summaryText ? (
     <div className="min-w-0 max-w-full text-base text-muted-foreground line-clamp-4 break-words">
-      {metadata.summary}
+      {summaryText}
     </div>
-  )
+  ) : null
 
   if (isSmallScreen) {
     return (
@@ -111,6 +114,7 @@ export default function PublicationCard({
           {metadata.image && autoLoadMedia && (
             <Image
               image={{ url: metadata.image, pubkey: event.pubkey }}
+              classNames={{ wrapper: 'w-auto max-w-[min(400px,42%)] shrink-0 xl:max-w-[400px]' }}
               className="aspect-[4/3] h-44 max-h-44 w-auto max-w-[min(400px,42%)] min-w-0 shrink rounded-lg bg-foreground object-cover xl:aspect-video xl:max-w-[400px]"
               hideIfError
             />

src/components/Note/WikiCard.tsx

@@ -1,3 +1,4 @@
+import { cardEventBodyBlurb } from '@/lib/card-event-body-blurb'
 import { getLongFormArticleMetadataFromEvent } from '@/lib/event-metadata'
 import { toNote, toNoteList } from '@/lib/link'
 import { useSecondaryPageOptional } from '@/PageManager'
@@ -21,6 +22,8 @@ export default function WikiCard({
   const contentPolicy = useContentPolicyOptional()
   const autoLoadMedia = contentPolicy?.autoLoadMedia ?? true
   const metadata = useMemo(() => getLongFormArticleMetadataFromEvent(event), [event])
+  const bodyBlurb = useMemo(() => cardEventBodyBlurb(event.content), [event.content])
+  const summaryText = (metadata.summary?.trim() || bodyBlurb).trim()
 
   const handleCardClick = (e: React.MouseEvent) => {
     e.stopPropagation()
@@ -46,9 +49,9 @@ export default function WikiCard({
     </div>
   )
 
-  const summaryComponent = metadata.summary && (
-    <div className="text-base text-muted-foreground line-clamp-4">{metadata.summary}</div>
-  )
+  const summaryComponent = summaryText ? (
+    <div className="text-base text-muted-foreground line-clamp-4 break-words">{summaryText}</div>
+  ) : null
 
   if (isSmallScreen) {
     return (
@@ -84,6 +87,7 @@ export default function WikiCard({
           {metadata.image && autoLoadMedia && (
             <Image
               image={{ url: metadata.image, pubkey: event.pubkey }}
+              classNames={{ wrapper: 'w-auto max-w-[400px] shrink-0' }}
               className="rounded-lg aspect-[4/3] xl:aspect-video object-cover bg-foreground h-44 max-w-[400px]"
               hideIfError
             />

src/components/Note/index.tsx

@@ -60,6 +60,7 @@ import AsciidocArticle from './AsciidocArticle/AsciidocArticle'
 import PublicationCard from './PublicationCard'
 import PublicationIndex from './PublicationIndex/PublicationIndex'
 import WikiCard from './WikiCard'
+import LongFormCard from './LongFormCard'
 import MutedNote from './MutedNote'
 import NsfwNote from './NsfwNote'
 import PictureNote from './PictureNote'
@@ -329,7 +330,11 @@ export default function Note({
       <PublicationCard className="mt-2" event={displayEvent} />
     )
   } else if (event.kind === kinds.LongFormArticle) {
-    content = renderEventContent({ hideMetadata: true })
+    content = showFull ? (
+      renderEventContent({ hideMetadata: true })
+    ) : (
+      <LongFormCard className="mt-2" event={displayEvent} />
+    )
   } else if (event.kind === kinds.LiveEvent || event.kind === 30312 || event.kind === 30313) {
     content = <LiveEvent className="mt-2" event={displayEvent} />
   } else if (event.kind === ExtendedKind.GROUP_METADATA) {

src/lib/card-event-body-blurb.ts

@@ -0,0 +1,26 @@
+/** Max length for card blurb when the `summary` tag is absent (article-style events). */
+export const CARD_EVENT_BODY_BLURB_MAX = 250
+
+/**
+ * First {@link CARD_EVENT_BODY_BLURB_MAX} characters of event `content`, stripped of common
+ * markdown / lightweight HTML so feed cards can show a readable teaser without a `summary` tag.
+ */
+export function cardEventBodyBlurb(raw: string | undefined, max = CARD_EVENT_BODY_BLURB_MAX): string {
+  if (raw == null) return ''
+  let s = raw.trim()
+  if (!s) return ''
+
+  s = s.replace(/```[\s\S]*?```/g, ' ')
+  s = s.replace(/`[^`]+`/g, ' ')
+  s = s.replace(/<[^>]+>/g, ' ')
+  s = s.replace(/!\[([^\]]*)\]\([^)]*\)/g, '$1')
+  s = s.replace(/\[([^\]]+)\]\([^)]*\)/g, '$1')
+  s = s.replace(/^#{1,6}\s+/gm, '')
+  s = s.replace(/\*\*|__/g, '')
+  s = s.replace(/~~/g, '')
+  s = s.replace(/\*|_/g, ' ')
+  s = s.replace(/\s+/g, ' ').trim()
+  if (!s) return ''
+  if (s.length <= max) return s
+  return `${s.slice(0, max).trimEnd()}…`
+}

src/lib/event-metadata.ts

@@ -518,14 +518,15 @@ export function getLongFormArticleMetadataFromEvent(event: Event) {
   const tags = new Set<string>()
 
   event.tags.forEach(([tagName, tagValue]) => {
-    if (tagName === 'title') {
-      title = tagValue
-    } else if (tagName === 'summary') {
-      summary = tagValue
-    } else if (tagName === 'image') {
-      image = tagValue
-    } else if (tagName === 't' && tagValue && tags.size < 6) {
-      tags.add(tagValue.toLowerCase())
+    const n = tagName?.toLowerCase()
+    if (n === 'title' && tagValue?.trim()) {
+      title = tagValue.trim()
+    } else if (n === 'summary' && tagValue?.trim()) {
+      summary = tagValue.trim()
+    } else if (n === 'image' && tagValue?.trim()) {
+      image = tagValue.trim()
+    } else if (n === 't' && tagValue?.trim() && tags.size < 6) {
+      tags.add(tagValue.trim().replace(/^#/, '').toLowerCase())
     }
   })