Working.

static/db.js

@@ -395,6 +395,25 @@ export async function buildReplyCountMap() {
     }
     return { direct, recursive };
 }
+export async function getPostById(postID) {
+    const knownUsers = [...(await indexedDB.databases())]
+        .map(db => db.name?.replace('user_', '')).filter(Boolean);
+    for (const userID of knownUsers) {
+        try {
+            const { store } = await getDBTransactionStore(userID);
+            const index = store.index("postIDIndex");
+            const result = await new Promise((resolve, reject) => {
+                const req = index.get(postID);
+                req.onsuccess = () => resolve(req.result);
+                req.onerror = () => reject(req.error);
+            });
+            if (result)
+                return result;
+        }
+        catch (_) { }
+    }
+    return undefined;
+}
 export async function getRepliesForPost(postID) {
     const knownUsers = [...(await indexedDB.databases())]
         .map(db => db.name?.replace('user_', '')).filter(Boolean);