improve tag validation (bluesky-social#1684)

* check faceted tags for slurs

* format

* fix baby bug

packages/pds/src/repo/prepare.ts

@@ -31,6 +31,7 @@ import {
   Record as PostRecord,
   isRecord as isPost,
 } from '../lexicon/types/app/bsky/feed/post'
+import { isTag } from '../lexicon/types/app/bsky/richtext/facet'
 import { isRecord as isList } from '../lexicon/types/app/bsky/graph/list'
 import { isRecord as isProfile } from '../lexicon/types/app/bsky/actor/profile'
 import { hasExplicitSlur } from '../handle/explicit-slurs'
@@ -300,7 +301,17 @@ function assertNoExplicitSlurs(rkey: string, record: RepoRecord) {
     toCheck += ' ' + rkey
     toCheck += ' ' + record.displayName
   } else if (isPost(record)) {
-    toCheck += record.tags?.join(' ')
+    if (record.tags) {
+      toCheck += record.tags.join(' ')
+    }
+
+    for (const facet of record.facets || []) {
+      for (const feat of facet.features) {
+        if (isTag(feat)) {
+          toCheck += ' ' + feat.tag
+        }
+      }
+    }
   }
   if (hasExplicitSlur(toCheck)) {
     throw new InvalidRecordError('Unacceptable slur in record')

packages/pds/tests/create-post.test.ts

@@ -1,4 +1,9 @@
-import AtpAgent, { AppBskyFeedPost, AtUri } from '@atproto/api'
+import AtpAgent, {
+  AppBskyFeedPost,
+  AtUri,
+  RichText,
+  AppBskyRichtextFacet,
+} from '@atproto/api'
 import { runTestServer, TestServerInfo } from './_util'
 import { SeedClient } from './seeds/client'
 import basicSeed from './seeds/basic'
@@ -42,4 +47,32 @@ describe('pds posts record creation', () => {
     expect(record).toBeTruthy()
     expect(record.tags).toEqual(['javascript', 'hehe'])
   })
+
+  it('handles RichText tag facets as well', async () => {
+    const rt = new RichText({ text: 'hello #world' })
+    await rt.detectFacets(agent)
+
+    const post: AppBskyFeedPost.Record = {
+      text: rt.text,
+      facets: rt.facets,
+      createdAt: new Date().toISOString(),
+    }
+
+    const res = await agent.api.app.bsky.feed.post.create(
+      { repo: sc.dids.alice },
+      post,
+      sc.getHeaders(sc.dids.alice),
+    )
+    const { value: record } = await agent.api.app.bsky.feed.post.get({
+      repo: sc.dids.alice,
+      rkey: new AtUri(res.uri).rkey,
+    })
+
+    expect(record).toBeTruthy()
+    expect(
+      record.facets?.every((f) => {
+        return AppBskyRichtextFacet.isTag(f.features[0])
+      }),
+    ).toBeTruthy()
+  })
 })