From 3affa30fa620b683bdd55df9da5c48711d07563d Mon Sep 17 00:00:00 2001
From: Mackie <iwan.mackie@gmail.com>
Date: Mon, 8 Jun 2026 08:19:46 +0800
Subject: [PATCH] data

---
 src/hooks/useDashboardData.ts | 25 ++++++++++++++++++++-----
 src/worker/data.worker.ts     | 30 +++++++++++++++++++++++-------
 2 files changed, 43 insertions(+), 12 deletions(-)

diff --git a/src/hooks/useDashboardData.ts b/src/hooks/useDashboardData.ts
index c0d2c9d..bef10ea 100644
--- a/src/hooks/useDashboardData.ts
+++ b/src/hooks/useDashboardData.ts
@@ -1,23 +1,38 @@
 import { useEffect, useState } from 'react';
 
+// Define the shape of your data
+interface MarketUpdate {
+  symbol: string;
+  price: string;
+  id: string;
+  timestamp: number;
+}
+
 export const useDashboardData = () => {
-  const [data, setData] = useState<any[]>([]);
+  // Store the latest price for each symbol in an object
+  const [latestPrices, setLatestPrices] = useState<Record<string, MarketUpdate>>({});
 
   useEffect(() => {
-    // Instantiate the worker
     const worker = new Worker(new URL('../worker/data.worker.ts', import.meta.url), {
       type: 'module',
     });
 
     worker.onmessage = (event) => {
       if (event.data.type === 'BATCH_UPDATE') {
-        // Keep only the latest 1000 items to prevent memory bloat
-        setData((prev) => [...event.data.payload, ...prev].slice(0, 1000));
+        setLatestPrices((prev) => {
+          const newState = { ...prev };
+          // Loop through the batch and update only the specific symbol
+          event.data.payload.forEach((update: MarketUpdate) => {
+            newState[update.symbol] = update;
+          });
+          return newState;
+        });
       }
     };
 
     return () => worker.terminate();
   }, []);
 
-  return data;
+  // Return the values as an array so you can easily map over them in your UI
+  return Object.values(latestPrices);
 };
\ No newline at end of file
diff --git a/src/worker/data.worker.ts b/src/worker/data.worker.ts
index f10341f..a88b672 100644
--- a/src/worker/data.worker.ts
+++ b/src/worker/data.worker.ts
@@ -1,12 +1,28 @@
 // src/worker/data.worker.ts
-const generateUpdate = () => ({
-  id: Math.random().toString(36).substring(7),
-  symbol: "BTC/USD",
-  price: (Math.random() * 50000).toFixed(2),
-  timestamp: Date.now(),
-});
 
-// Stream updates every 16ms (target ~60fps)
+const symbols = [
+  "BTC/USD", 
+  "ETH/USD", 
+  "SOL/USD", 
+  "ADA/USD", 
+  "DOT/USD",
+  "LINK/USD",
+  "XRP/USD",
+  "AVAX/USD"
+];
+
+const generateUpdate = () => {
+  // Randomly pick a symbol from the list
+  const symbol = symbols[Math.floor(Math.random() * symbols.length)];
+  
+  return {
+    id: Math.random().toString(36).substring(7),
+    symbol: symbol,
+    price: (Math.random() * 50000).toFixed(2),
+    timestamp: Date.now(),
+  };
+};
+
 setInterval(() => {
   const updates = Array.from({ length: 5 }, generateUpdate);
   self.postMessage({ type: 'BATCH_UPDATE', payload: updates });