Block posting of invalid chat invites (#10757)

Co-authored-by: Samuel Newman <mozzius@protonmail.com>

src/view/com/composer/Composer.tsx

@@ -57,7 +57,7 @@ import {
 import {plural} from '@lingui/core/macro'
 import {Trans, useLingui} from '@lingui/react/macro'
 import {useNavigation} from '@react-navigation/native'
-import {useQueryClient} from '@tanstack/react-query'
+import {useQueries, useQueryClient} from '@tanstack/react-query'
 
 import * as apilib from '#/lib/api/index'
 import {EmbeddingDisabledError} from '#/lib/api/resolve'
@@ -95,6 +95,7 @@ import {
 } from '#/state/preferences/languages'
 import {usePreferencesQuery} from '#/state/queries/preferences'
 import {useProfileQuery} from '#/state/queries/profile'
+import {resolveLinkQueryOptions} from '#/state/queries/resolve-link'
 import {useAgent, useSession} from '#/state/session'
 import {useComposerControls} from '#/state/shell/composer'
 import {type ComposerOpts, type OnPostSuccessData} from '#/state/shell/composer'
@@ -865,8 +866,25 @@ export const ComposePost = ({
     }
   }, [thread, requireAltTextEnabled, l])
 
+  // Subscribe to the resolve-link cache for any link URIs in the thread so we
+  // can detect chat invites that resolved to no preview (revoked/expired) and
+  // block publishing - otherwise the post would go out without the embed.
+  const linkUris = thread.posts
+    .filter(post => post.embed.link)
+    .map(post => post.embed.link!.uri)
+  const linkQueries = useQueries({
+    queries: linkUris.map(uri => ({
+      ...resolveLinkQueryOptions(agent, uri),
+      enabled: false,
+    })),
+  })
+  const hasUnavailableChatInvite = linkQueries.some(
+    q => q.data?.type === 'chat-invite' && !q.data.view,
+  )
+
   const canPost =
     !missingAltError &&
+    !hasUnavailableChatInvite &&
     thread.posts.some(post => !isEmptyPost(post)) &&
     thread.posts.every(
       post =>