fix(composer): handle empty quotes with reposts

src/view/com/composer/Composer.tsx

@@ -57,7 +57,7 @@ import {useNavigation} from '@react-navigation/native'
 import {useQueryClient} from '@tanstack/react-query'
 
 import * as apilib from '#/lib/api/index'
-import {EmbeddingDisabledError} from '#/lib/api/resolve'
+import {EmbeddingDisabledError, type ResolvedLink} from '#/lib/api/resolve'
 import {retry} from '#/lib/async/retry'
 import {until} from '#/lib/async/until'
 import {
@@ -78,6 +78,7 @@ import {cleanError} from '#/lib/strings/errors'
 import {colors} from '#/lib/styles'
 import {logger} from '#/logger'
 import {isAndroid, isIOS, isNative, isWeb} from '#/platform/detection'
+import {updatePostShadow} from '#/state/cache/post-shadow'
 import {useDialogStateControlContext} from '#/state/dialogs'
 import {emitPostCreated} from '#/state/events'
 import {
@@ -94,6 +95,7 @@ import {
 } from '#/state/preferences/languages'
 import {usePreferencesQuery} from '#/state/queries/preferences'
 import {useProfileQuery} from '#/state/queries/profile'
+import {RQKEY_LINK as RQKEY_EXTERNAL_LINK} from '#/state/queries/resolve-link'
 import {type Gif} from '#/state/queries/tenor'
 import {useAgent, useSession} from '#/state/session'
 import {useComposerControls} from '#/state/shell/composer'
@@ -385,6 +387,63 @@ export const ComposePost = ({
     if (isPublishing) {
       return
     }
+    const firstPost = thread.posts[0]
+    logger.info(`composer: publish pressed`, firstPost)
+
+    let quoteForRepost: {uri: string; cid: string} | undefined
+    if (
+      !replyTo &&
+      thread.posts.length === 1 &&
+      !firstPost.embed.media &&
+      !firstPost.embed.link &&
+      firstPost.embed.quote
+    ) {
+      const quoteUri = firstPost.embed.quote.uri
+      const text = firstPost.richtext.text.trim()
+
+      if (text.length === 0 || text === quoteUri) {
+        // it's an empty quote so we need to get the cid
+        if (initQuote?.uri === quoteUri) {
+          // case 1, user started with "quote post" button. we have the cid in initQuote
+          quoteForRepost = {
+            uri: initQuote.uri,
+            cid: initQuote.cid,
+          }
+        } else {
+          // case 2, user pasted a link of a post. we need to get post details from cache
+          const metadata = queryClient.getQueryData<ResolvedLink>(
+            RQKEY_EXTERNAL_LINK(quoteUri),
+          )
+          if (metadata?.type === 'record' && metadata.kind === 'post') {
+            quoteForRepost = {
+              uri: metadata.view.uri,
+              cid: metadata.view.cid,
+            }
+          }
+        }
+      }
+    }
+
+    if (quoteForRepost) {
+      setError('')
+      setIsPublishing(true)
+      try {
+        const {uri: repostUri} = await agent.repost(
+          quoteForRepost.uri,
+          quoteForRepost.cid,
+        )
+        logEvent('post:repost', {logContext: 'Post'})
+        updatePostShadow(queryClient, quoteForRepost.uri, {
+          repostUri,
+        })
+        onClose()
+        onPost?.(undefined)
+      } catch (e: any) {
+        setError(cleanError(e.message))
+        setIsPublishing(false)
+      }
+      return
+    }
 
     if (!canPost) {
       return