feat: support comment content redirection for the redirection api

src/pages/api/redirection.tsx

@@ -1,3 +1,4 @@
+import { NoteEntity } from "crossbell.js"
 import { NextApiRequest, NextApiResponse } from "next"
 
 import { getDefaultSlug } from "~/lib/default-slug"
@@ -5,18 +6,50 @@ import { IS_VERCEL_PREVIEW } from "~/lib/env"
 import { getSiteLink } from "~/lib/helpers"
 import { checkDomainServer } from "~/models/site.model"
 
+async function getOriginalNote(
+  characterId: string,
+  noteId: string,
+): Promise<NoteEntity> {
+  const note = await (
+    await fetch(
+      `https://indexer.crossbell.io/v1/characters/${characterId}/notes/${noteId}`,
+    )
+  ).json()
+
+  if (note?.toNote) {
+    if (note?.toNote.toNoteId) {
+      return await getOriginalNote(
+        note?.toNote.toCharacterId,
+        note?.toNote.toNoteId,
+      )
+    } else {
+      return note.toNote
+    }
+  } else {
+    return note
+  }
+}
+
 export default async function handler(
   req: NextApiRequest,
   res: NextApiResponse,
 ) {
-  const { characterId, noteId } = req.query
+  let { characterId, noteId } = req.query
 
-  if (!characterId) {
+  if (!characterId || typeof characterId !== "string") {
     res.status(400).json({ error: "Missing characterId" })
     return
   }
 
-  const character = await (
+  let character
+  let note
+
+  if (noteId && typeof noteId === "string") {
+    note = await getOriginalNote(characterId, noteId)
+    characterId = note.characterId + ""
+  }
+
+  character = await (
     await fetch(`https://indexer.crossbell.io/v1/characters/${characterId}`)
   ).json()
 
@@ -31,19 +64,21 @@ export default async function handler(
     subdomain: character?.handle,
   })
 
-  if (noteId) {
-    const note = await (
-      await fetch(
-        `https://indexer.crossbell.io/v1/characters/${characterId}/notes/${noteId}`,
-      )
-    ).json()
+  if (note) {
     const slug =
       note?.metadata?.content?.attributes?.find(
         (a: any) => a.trait_type === "xlog_slug",
       )?.value ||
-      getDefaultSlug(note?.metadata?.content?.title, `${characterId}-${noteId}`)
+      getDefaultSlug(
+        note?.metadata?.content?.title || "",
+        `${characterId}-${noteId}`,
+      )
 
     link += `/${encodeURIComponent(slug)}`
+
+    if (note.noteId + "" !== noteId) {
+      link += `#comments`
+    }
   }
 
   if (IS_VERCEL_PREVIEW) {