feat: highlight (#346)

src/components/ContentPreview/index.tsx

@@ -16,10 +16,12 @@ import Emoji from '../Emoji'
 
 export default function ContentPreview({
   event,
-  className
+  className,
+  onClick
 }: {
   event?: Event
   className?: string
+  onClick?: React.MouseEventHandler<HTMLDivElement> | undefined
 }) {
   const { t } = useTranslation()
   const nodes = useMemo(() => {
@@ -37,7 +39,7 @@ export default function ContentPreview({
   const emojiInfos = extractEmojiInfosFromTags(event?.tags)
 
   return (
-    <div className={cn('pointer-events-none', className)}>
+    <div className={cn('pointer-events-none', className)} onClick={onClick}>
       {nodes.map((node, index) => {
         if (node.type === 'text') {
           return node.data

src/components/Note/Highlight.tsx

@@ -0,0 +1,129 @@
+import { useFetchEvent } from '@/hooks'
+import { createFakeEvent, isSupportedKind } from '@/lib/event'
+import { toNjump, toNote } from '@/lib/link'
+import { isValidPubkey } from '@/lib/pubkey'
+import { generateEventIdFromATag } from '@/lib/tag'
+import { cn } from '@/lib/utils'
+import { useSecondaryPage } from '@/PageManager'
+import { Event } from 'nostr-tools'
+import { useMemo } from 'react'
+import Content from '../Content'
+import ContentPreview from '../ContentPreview'
+import UserAvatar from '../UserAvatar'
+
+export default function Highlight({ event, className }: { event: Event; className?: string }) {
+  const comment = useMemo(() => event.tags.find((tag) => tag[0] === 'comment')?.[1], [event])
+
+  return (
+    <div className={cn('text-wrap break-words whitespace-pre-wrap space-y-4', className)}>
+      {comment && <Content event={createFakeEvent({ content: comment })} />}
+      <div className="flex gap-4">
+        <div className="w-1 flex-shrink-0 my-1 bg-primary/60 rounded-md" />
+        <div className="italic whitespace-pre-line">{event.content}</div>
+      </div>
+      <HighlightSource event={event} />
+    </div>
+  )
+}
+
+function HighlightSource({ event }: { event: Event }) {
+  const { push } = useSecondaryPage()
+  const sourceTag = useMemo(() => {
+    let sourceTag: string[] | undefined
+    for (const tag of event.tags) {
+      if (tag[2] === 'source') {
+        sourceTag = tag
+        break
+      }
+      if (tag[0] === 'r') {
+        sourceTag = tag
+        continue
+      } else if (tag[0] === 'a') {
+        if (!sourceTag || sourceTag[0] !== 'r') {
+          sourceTag = tag
+        }
+        continue
+      } else if (tag[0] === 'e') {
+        if (!sourceTag || sourceTag[0] === 'e') {
+          sourceTag = tag
+        }
+        continue
+      }
+    }
+
+    return sourceTag
+  }, [event])
+  const { event: referenceEvent } = useFetchEvent(
+    sourceTag && sourceTag[0] === 'e' ? sourceTag[1] : undefined
+  )
+  const referenceEventId = useMemo(() => {
+    if (!sourceTag || sourceTag[0] === 'r') return
+    if (sourceTag[0] === 'e') {
+      return sourceTag[1]
+    }
+    if (sourceTag[0] === 'a') {
+      return generateEventIdFromATag(sourceTag)
+    }
+  }, [sourceTag])
+  const pubkey = useMemo(() => {
+    if (referenceEvent) {
+      return referenceEvent.pubkey
+    }
+    if (sourceTag && sourceTag[0] === 'a') {
+      const [, pubkey] = sourceTag[1].split(':')
+      if (isValidPubkey(pubkey)) {
+        return pubkey
+      }
+    }
+  }, [sourceTag, referenceEvent])
+
+  if (!sourceTag) {
+    return null
+  }
+
+  if (sourceTag[0] === 'r') {
+    return (
+      <div className="truncate text-muted-foreground">
+        {'From '}
+        <a
+          href={sourceTag[1]}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="underline text-muted-foreground hover:text-foreground"
+          onClick={(e) => e.stopPropagation()}
+        >
+          {sourceTag[1]}
+        </a>
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex items-center gap-2 text-muted-foreground">
+      <div>{'From'}</div>
+      {pubkey && <UserAvatar userId={pubkey} size="xSmall" className="cursor-pointer" />}
+      {referenceEvent && isSupportedKind(referenceEvent.kind) ? (
+        <ContentPreview
+          className="truncate underline pointer-events-auto cursor-pointer hover:text-foreground"
+          event={referenceEvent}
+          onClick={(e) => {
+            e.stopPropagation()
+            push(toNote(referenceEvent))
+          }}
+        />
+      ) : referenceEventId ? (
+        <div className="truncate text-muted-foreground">
+          <a
+            href={toNjump(referenceEventId)}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="underline text-muted-foreground hover:text-foreground"
+            onClick={(e) => e.stopPropagation()}
+          >
+            {toNjump(referenceEventId)}
+          </a>
+        </div>
+      ) : null}
+    </div>
+  )
+}

src/components/Note/index.tsx

@@ -1,8 +1,12 @@
 import { useSecondaryPage } from '@/PageManager'
-import { ExtendedKind } from '@/constants'
-import { extractImageInfosFromEventTags, getParentEventId, getUsingClient } from '@/lib/event'
+import {
+  extractImageInfosFromEventTags,
+  getParentEventId,
+  getUsingClient,
+  isPictureEvent
+} from '@/lib/event'
 import { toNote } from '@/lib/link'
-import { Event } from 'nostr-tools'
+import { Event, kinds } from 'nostr-tools'
 import { useMemo } from 'react'
 import Content from '../Content'
 import { FormattedTimestamp } from '../FormattedTimestamp'
@@ -11,6 +15,7 @@ import NoteOptions from '../NoteOptions'
 import ParentNotePreview from '../ParentNotePreview'
 import UserAvatar from '../UserAvatar'
 import Username from '../Username'
+import Highlight from './Highlight'
 
 export default function Note({
   event,
@@ -25,10 +30,16 @@ export default function Note({
 }) {
   const { push } = useSecondaryPage()
   const parentEventId = useMemo(
-    () => (hideParentNotePreview ? undefined : getParentEventId(event)),
+    () =>
+      !hideParentNotePreview && event.kind === kinds.ShortTextNote
+        ? getParentEventId(event)
+        : undefined,
     [event, hideParentNotePreview]
   )
-  const imageInfos = useMemo(() => extractImageInfosFromEventTags(event), [event])
+  const imageInfos = useMemo(
+    () => (isPictureEvent(event) ? extractImageInfosFromEventTags(event) : []),
+    [event]
+  )
   const usingClient = useMemo(() => getUsingClient(event), [event])
 
   return (
@@ -66,10 +77,12 @@ export default function Note({
           }}
         />
       )}
-      <Content className="mt-2" event={event} />
-      {event.kind === ExtendedKind.PICTURE && imageInfos.length > 0 && (
-        <ImageGallery images={imageInfos} />
+      {event.kind === kinds.Highlights ? (
+        <Highlight className="mt-2" event={event} />
+      ) : (
+        <Content className="mt-2" event={event} />
       )}
+      {imageInfos.length > 0 && <ImageGallery images={imageInfos} />}
     </div>
   )
 }

src/components/PostEditor/Preview.tsx

@@ -1,22 +1,11 @@
 import { Card } from '@/components/ui/card'
-import dayjs from 'dayjs'
+import { createFakeEvent } from '@/lib/event'
 import Content from '../Content'
 
 export default function Preview({ content }: { content: string }) {
   return (
     <Card className="p-3 min-h-52">
-      <Content
-        event={{
-          content,
-          kind: 1,
-          tags: [],
-          created_at: dayjs().unix(),
-          id: '',
-          pubkey: '',
-          sig: ''
-        }}
-        className="pointer-events-none h-full"
-      />
+      <Content event={createFakeEvent({ content })} className="pointer-events-none h-full" />
     </Card>
   )
 }

src/lib/event.ts

@@ -60,7 +60,7 @@ export function isProtectedEvent(event: Event) {
 }
 
 export function isSupportedKind(kind: number) {
-  return [kinds.ShortTextNote, ExtendedKind.PICTURE].includes(kind)
+  return [kinds.ShortTextNote, kinds.Highlights, ExtendedKind.PICTURE].includes(kind)
 }
 
 export function getParentEventTag(event?: Event) {
@@ -524,3 +524,16 @@ export function extractEmojiInfosFromTags(tags: string[][] = []) {
     })
     .filter(Boolean) as TEmoji[]
 }
+
+export function createFakeEvent(event: Partial<Event>): Event {
+  return {
+    id: '',
+    kind: 1,
+    pubkey: '',
+    content: '',
+    created_at: 0,
+    tags: [],
+    sig: '',
+    ...event
+  }
+}

src/lib/link.ts

@@ -52,3 +52,4 @@ export const toZapStreamLiveEvent = (event: Event) => {
   return `https://zap.stream/${getSharableEventId(event)}`
 }
 export const toChachiChat = (relay: string, d: string) => `https://chachi.chat/${relay}/${d}`
+export const toNjump = (id: string) => `https://njump.me/${id}`

src/lib/tag.ts

@@ -29,6 +29,21 @@ export function generateEventIdFromETag(tag: string[]) {
   }
 }
 
+export function generateEventIdFromATag(tag: string[]) {
+  try {
+    const [, coordinate, relay] = tag
+    const [kind, pubkey, identifier] = coordinate.split(':')
+    return nip19.naddrEncode({
+      kind: Number(kind),
+      pubkey,
+      identifier,
+      relays: relay ? [relay] : undefined
+    })
+  } catch {
+    return undefined
+  }
+}
+
 export function generateEventId(event: Pick<Event, 'id' | 'pubkey'>) {
   const relay = client.getEventHint(event.id)
   return nip19.neventEncode({ id: event.id, author: event.pubkey, relays: [relay] })

src/pages/secondary/NotePage/index.tsx

@@ -22,8 +22,14 @@ import NotFoundPage from '../NotFoundPage'
 const NotePage = forwardRef(({ id, index }: { id?: string; index?: number }, ref) => {
   const { t } = useTranslation()
   const { event, isFetching } = useFetchEvent(id)
-  const parentEventId = useMemo(() => getParentEventId(event), [event])
-  const rootEventId = useMemo(() => getRootEventId(event), [event])
+  const parentEventId = useMemo(
+    () => (event?.kind === kinds.ShortTextNote ? getParentEventId(event) : undefined),
+    [event]
+  )
+  const rootEventId = useMemo(
+    () => (event?.kind === kinds.ShortTextNote ? getRootEventId(event) : undefined),
+    [event]
+  )
 
   if (!event && isFetching) {
     return (
@@ -80,11 +86,11 @@ const NotePage = forwardRef(({ id, index }: { id?: string; index?: number }, ref
         <NoteStats className="mt-3" event={event} fetchIfNotExisting displayTopZapsAndLikes />
       </div>
       <Separator className="mt-4" />
-      {event.kind === kinds.ShortTextNote ? (
+      {[kinds.ShortTextNote, kinds.Highlights].includes(event.kind) ? (
         <ReplyNoteList key={`reply-note-list-${event.id}`} index={index} event={event} />
-      ) : isPictureEvent(event) ? (
+      ) : (
         <Nip22ReplyNoteList key={`nip22-reply-note-list-${event.id}`} event={event} />
-      ) : null}
+      )}
     </SecondaryPageLayout>
   )
 })