chore(buddybook): sort by signatures

examples/buddybook/src/components/Chain/View/ChainList.tsx

@@ -7,6 +7,7 @@ import { Button } from '@/components/ui/button';
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger, DialogDescription, DialogFooter } from "@/components/ui/dialog";
 import QRCode from '@/components/QRCode';
 import { Loader2 } from "lucide-react";
+import { sortBlocksBySignatures } from '@/lib/waku';
 
 interface ChainListProps {
   chainsData: BlockPayload[];
@@ -105,6 +106,7 @@ const ChainList: React.FC<ChainListProps> = ({ chainsData, onChainUpdate, isLoad
   };
 
   const rootBlocks = chainsData.filter(block => !block.parentBlockUUID);
+  const sortedRootBlocks = sortBlocksBySignatures(rootBlocks, chainsData);
 
   return (
     <Card className="w-full max-w-4xl mx-auto">
@@ -124,7 +126,7 @@ const ChainList: React.FC<ChainListProps> = ({ chainsData, onChainUpdate, isLoad
           <p>No books found.</p>
         ) : (
           <ul className="space-y-4">
-            {rootBlocks.map((block) => renderBlock(block, 0))}
+            {sortedRootBlocks.map((block) => renderBlock(block, 0))}
           </ul>
         )}
       </CardContent>

examples/buddybook/src/lib/waku.ts

@@ -142,3 +142,18 @@ export async function subscribeToFilter(node: LightNode, callback: (message: Blo
         throw new Error("Failed to subscribe to filter")
     }
 }
+
+export function calculateTotalSignatures(block: BlockPayload, allBlocks: BlockPayload[]): number {
+    const childBlocks = allBlocks.filter(b => b.parentBlockUUID === block.blockUUID);
+    return block.signatures.length + childBlocks.reduce((acc, child) => 
+        acc + calculateTotalSignatures(child, allBlocks), 0
+    );
+}
+
+export function sortBlocksBySignatures(blocks: BlockPayload[], allBlocks: BlockPayload[]): BlockPayload[] {
+    return [...blocks].sort((a, b) => {
+        const totalSignaturesA = calculateTotalSignatures(a, allBlocks);
+        const totalSignaturesB = calculateTotalSignatures(b, allBlocks);
+        return totalSignaturesB - totalSignaturesA;
+    });
+}