replies working, need to add root post ID

static/db.js

@@ -356,6 +356,64 @@ export async function getAllIds(userID) {
         };
     });
 }
+export async function buildReplyCountMap() {
+    const children = new Map();
+    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("postReplyIndex");
+            const replies = await new Promise((resolve, reject) => {
+                const req = index.getAll();
+                req.onsuccess = () => resolve(req.result);
+                req.onerror = () => reject(req.error);
+            });
+            for (const r of replies) {
+                const parentID = r.data.reply_to_id;
+                const replyID = r.data.post_id;
+                if (parentID && replyID) {
+                    if (!children.has(parentID))
+                        children.set(parentID, []);
+                    children.get(parentID).push(replyID);
+                }
+            }
+        }
+        catch (_) { }
+    }
+    const direct = new Map();
+    for (const [parentID, kids] of children) {
+        direct.set(parentID, kids.length);
+    }
+    const countDescendants = (postID) => {
+        const kids = children.get(postID) ?? [];
+        return kids.reduce((sum, kid) => sum + 1 + countDescendants(kid), 0);
+    };
+    const recursive = new Map();
+    for (const postID of children.keys()) {
+        recursive.set(postID, countDescendants(postID));
+    }
+    return { direct, recursive };
+}
+export async function getRepliesForPost(postID) {
+    const knownUsers = [...(await indexedDB.databases())]
+        .map(db => db.name?.replace('user_', '')).filter(Boolean);
+    let replies = [];
+    for (const userID of knownUsers) {
+        try {
+            const { store } = await getDBTransactionStore(userID);
+            const index = store.index("postReplyIndex");
+            const results = await new Promise((resolve, reject) => {
+                const req = index.getAll(postID);
+                req.onsuccess = () => resolve(req.result);
+                req.onerror = () => reject(req.error);
+            });
+            replies = replies.concat(results);
+        }
+        catch (_) { }
+    }
+    return replies;
+}
 export async function getPostsByIds(userID, postIDs) {
     const { store } = await getDBTransactionStore(userID);
     const index = store.index("postIDIndex");