fix(blog): nsfw filtering, use L tag instead nsfw

src/pages/blog/loader.ts

@@ -1,4 +1,5 @@
 import { NDKFilter } from '@nostr-dev-kit/ndk'
+import { PROFILE_BLOG_FILTER_LIMIT } from '../../constants'
 import { NDKContextType } from 'contexts/NDKContext'
 import { kinds, nip19 } from 'nostr-tools'
 import { LoaderFunctionArgs, redirect } from 'react-router-dom'
@@ -59,33 +60,33 @@ export const blogRouteLoader =
       ) as FilterOptions
 
       // Fetch 4 in case the current blog is included in the latest
-      const latestModsFilter: NDKFilter = {
+      const latestFilter: NDKFilter = {
         authors: [pubkey],
         kinds: [kinds.LongFormArticle],
         limit: 4
       }
       // Add source filter
       if (filterOptions.source === window.location.host) {
-        latestModsFilter['#r'] = [filterOptions.source]
+        latestFilter['#r'] = [filterOptions.source]
       }
       // Filter by NSFW tag
+      // NSFWFilter.Only_NSFW -> fetch with content-warning label
       // NSFWFilter.Show_NSFW -> filter not needed
-      // NSFWFilter.Only_NSFW -> true
-      // NSFWFilter.Hide_NSFW -> false
-      if (filterOptions.nsfw !== NSFWFilter.Show_NSFW) {
-        latestModsFilter['#nsfw'] = [
-          (filterOptions.nsfw === NSFWFilter.Only_NSFW).toString()
-        ]
+      // NSFWFilter.Hide_NSFW -> up the limit and filter after fetch
+      if (filterOptions.nsfw === NSFWFilter.Only_NSFW) {
+        latestFilter['#L'] = ['content-warning']
+      } else if (filterOptions.nsfw === NSFWFilter.Hide_NSFW) {
+        // Up the limit in case we fetch multiple NSFW blogs
+        latestFilter.limit = PROFILE_BLOG_FILTER_LIMIT
       }
 
       // Parallel fetch blog event, latest events, mute, and nsfw lists in parallel
       const settled = await Promise.allSettled([
         ndkContext.fetchEvent(filter),
-        ndkContext.fetchEvents(latestModsFilter),
+        ndkContext.fetchEvents(latestFilter),
         ndkContext.getMuteLists(loggedInUserPubkey), // Pass pubkey for logged-in users
         ndkContext.getNSFWList()
       ])
-
       const result: BlogPageLoaderResult = {
         blog: undefined,
         latest: [],
@@ -120,6 +121,9 @@ export const blogRouteLoader =
         result.latest = fetchEventsResult.value
           .map(extractBlogCardDetails)
           .filter((b) => b.id !== result.blog?.id) // Filter out current blog if present
+          .filter(
+            (b) => !(b.nsfw && filterOptions.nsfw === NSFWFilter.Hide_NSFW)
+          ) // Filter out the NSFW if selected
           .slice(0, 3) // Take only three
       } else if (fetchEventsResult.status === 'rejected') {
         log(

src/pages/home.tsx

@@ -6,7 +6,7 @@ import { Swiper, SwiperSlide } from 'swiper/react'
 import { BlogCard } from '../components/BlogCard'
 import { GameCard } from '../components/GameCard'
 import { ModCard } from '../components/ModCard'
-import { LANDING_PAGE_DATA } from '../constants'
+import { LANDING_PAGE_DATA, PROFILE_BLOG_FILTER_LIMIT } from '../constants'
 import {
   useDidMount,
   useGames,
@@ -31,11 +31,7 @@ import '../styles/SimpleSlider.css'
 import '../styles/styles.css'
 
 // Import Swiper styles
-import {
-  filterForEventsTaggingId,
-  NDKEvent,
-  NDKFilter
-} from '@nostr-dev-kit/ndk'
+import { NDKEvent, NDKFilter } from '@nostr-dev-kit/ndk'
 import 'swiper/css'
 import 'swiper/css/navigation'
 import 'swiper/css/pagination'
@@ -332,38 +328,34 @@ const DisplayLatestBlogs = () => {
         // Show maximum of 4 blog posts
         // 2 should be featured and the most recent 2 from blog npubs
         // Populate the filter from known naddr (constants.ts)
-        const filters: NDKFilter[] = []
+        const filter: NDKFilter = {
+          kinds: [kinds.LongFormArticle],
+          authors: [],
+          '#d': []
+        }
         for (let i = 0; i < LANDING_PAGE_DATA.featuredBlogPosts.length; i++) {
           try {
             const naddr = LANDING_PAGE_DATA.featuredBlogPosts[i]
-            const filterId = filterForEventsTaggingId(naddr)
-            if (filterId) {
-              filters.push(filterId)
+            const decoded = nip19.decode<'naddr'>(naddr as `naddr1${string}`)
+            const { pubkey, identifier } = decoded.data
+            if (!filter.authors?.includes(pubkey)) {
+              filter.authors?.push(pubkey)
+            }
+            if (!filter.authors?.includes(identifier)) {
+              filter['#d']?.push(identifier)
             }
           } catch (error) {
             // Silently ignore
           }
         }
-        // Create a single filter based on multiple #a's
-        const filter = filters.reduce(
-          (filter, id) => {
-            const a = id['#a']
-            if (a) {
-              filter['#a']?.push(a[0])
-            }
-            return filter
-          },
-          {
-            '#a': []
-          } as NDKFilter
-        )
+
         // Prepare filter for the latest
         const blogNpubs = import.meta.env.VITE_BLOG_NPUBS.split(',')
         const blogHexkeys = blogNpubs
           .map(npubToHex)
           .filter((hexkey) => hexkey !== null)
 
-        // We fetch 4 posts in case of duplicates (from featured)
+        // We fetch more posts in case of duplicates (from featured)
         const latestFilter: NDKFilter = {
           authors: blogHexkeys,
           kinds: [kinds.LongFormArticle],
@@ -371,17 +363,15 @@ const DisplayLatestBlogs = () => {
         }
 
         // Filter by NSFW tag
-        // NSFWFilter.Show_NSFW -> filter not needed
-        // NSFWFilter.Only_NSFW -> true
-        // NSFWFilter.Hide_NSFW -> false
-        if (filterOptions.nsfw !== NSFWFilter.Show_NSFW) {
-          latestFilter['#nsfw'] = [
-            (filterOptions.nsfw === NSFWFilter.Only_NSFW).toString()
-          ]
+        if (filterOptions.nsfw === NSFWFilter.Only_NSFW) {
+          latestFilter['#L'] = ['content-warning']
+        } else if (filterOptions.nsfw === NSFWFilter.Hide_NSFW) {
+          // Up the limit in case we fetch multiple NSFW blogs
+          latestFilter.limit = PROFILE_BLOG_FILTER_LIMIT
         }
 
         const results = await Promise.allSettled([
-          fetchEvents({ ...filter, kinds: [kinds.LongFormArticle] }),
+          fetchEvents(filter),
           fetchEvents(latestFilter)
         ])
 
@@ -403,9 +393,13 @@ const DisplayLatestBlogs = () => {
             }, new Map())
             .values()
         )
-        const latest = unique.slice(0, 4)
+          .map(extractBlogCardDetails)
+          .filter(
+            (b) => !(b.nsfw && filterOptions.nsfw === NSFWFilter.Hide_NSFW)
+          )
 
-        setBlogs(latest.map(extractBlogCardDetails))
+        const latest = unique.slice(0, 4)
+        setBlogs(latest)
       } catch (error) {
         log(
           true,

src/pages/profile/index.tsx

@@ -704,10 +704,8 @@ const ProfileTabBlogs = () => {
       filter['#r'] = [host]
     }
 
-    if (filterOptions.nsfw !== NSFWFilter.Show_NSFW) {
-      filter['#nsfw'] = [
-        (filterOptions.nsfw === NSFWFilter.Only_NSFW).toString()
-      ]
+    if (filterOptions.nsfw === NSFWFilter.Only_NSFW) {
+      filter['#L'] = ['content-warning']
     }
 
     return filter
@@ -725,7 +723,7 @@ const ProfileTabBlogs = () => {
       }
       fetchEvents(filter)
         .then((events) => {
-          setBlogs(events.map(extractBlogCardDetails).filter((e) => e.naddr))
+          setBlogs(events.map(extractBlogCardDetails).filter((b) => b.naddr))
           setHasMore(events.length > PROFILE_BLOG_FILTER_LIMIT)
         })
         .finally(() => {
@@ -752,7 +750,7 @@ const ProfileTabBlogs = () => {
           setHasMore(nextBlogs.length > PROFILE_BLOG_FILTER_LIMIT)
           setPage((prev) => prev + 1)
           setBlogs(
-            nextBlogs.slice(0, PROFILE_BLOG_FILTER_LIMIT).filter((e) => e.naddr)
+            nextBlogs.slice(0, PROFILE_BLOG_FILTER_LIMIT).filter((b) => b.naddr)
           )
         })
         .finally(() => setIsLoading(false))
@@ -775,7 +773,7 @@ const ProfileTabBlogs = () => {
         .then((events) => {
           setHasMore(true)
           setPage((prev) => prev - 1)
-          setBlogs(events.map(extractBlogCardDetails).filter((e) => e.naddr))
+          setBlogs(events.map(extractBlogCardDetails).filter((b) => b.naddr))
         })
         .finally(() => setIsLoading(false))
     }
@@ -799,6 +797,11 @@ const ProfileTabBlogs = () => {
       })
     }
 
+    // Filter nsfw (Hide_NSFW option)
+    _blogs = _blogs.filter(
+      (b) => !(b.nsfw && filterOptions.nsfw === NSFWFilter.Hide_NSFW)
+    )
+
     // Only apply filtering if the user is not an admin or the admin has not selected "Unmoderated Fully"
     // Allow "Unmoderated Fully" when author visits own profile
     if (!((isAdmin || isOwner) && isUnmoderatedFully)) {

src/pages/write/action.tsx

@@ -84,12 +84,7 @@ export const writeRouteAction =
       .split(',')
       .map((t) => ['t', t])
 
-    const unsignedEvent: UnsignedEvent = {
-      kind: kinds.LongFormArticle,
-      created_at: currentTimeStamp,
-      pubkey: hexPubkey,
-      content: content,
-      tags: [
+    const tags = [
       ['d', uuid],
       ['a', aTag],
       ['r', rTag],
@@ -97,9 +92,19 @@ export const writeRouteAction =
       ['title', formSubmit.title!],
       ['image', formSubmit.image!],
       ['summary', formSubmit.summary!],
-        ['nsfw', (formSubmit.nsfw === 'on').toString()],
       ...tTags
     ]
+
+    // Add NSFW tag, L label namespace standardized tag
+    // https://github.com/nostr-protocol/nips/blob/2838e3bd51ac00bd63c4cef1601ae09935e7dd56/README.md#standardized-tags
+    if (formSubmit.nsfw === 'on') tags.push(['L', 'content-warning'])
+
+    const unsignedEvent: UnsignedEvent = {
+      kind: kinds.LongFormArticle,
+      created_at: currentTimeStamp,
+      pubkey: hexPubkey,
+      content: content,
+      tags: tags
     }
 
     try {

src/utils/blog.ts

@@ -8,8 +8,10 @@ export const extractBlogDetails = (event: NDKEvent): Partial<BlogDetails> => ({
   content: event.content,
   summary: getFirstTagValue(event, 'summary'),
   image: getFirstTagValue(event, 'image'),
-  nsfw: getFirstTagValue(event, 'nsfw') === 'true',
-
+  // Check L label namespace for content warning or nsfw (backwards compatibility)
+  nsfw:
+    getFirstTagValue(event, 'L') === 'content-warning' ||
+    getFirstTagValue(event, 'nsfw') === 'true',
   id: event.id,
   author: event.pubkey,
   published_at: getFirstTagValueAsInt(event, 'published_at'),