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feat: implement real-time dashboard updates via WebSockets

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syntaxbullet
2026-01-08 21:01:33 +01:00
parent fff90804c0
commit 1251df286e
7 changed files with 267 additions and 73 deletions
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16
shared/lib/events.ts Normal file
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@@ -0,0 +1,16 @@
import { EventEmitter } from "node:events";
/**
* Global system event bus for cross-module communication.
* Used primarily for real-time dashboard updates.
*/
class SystemEventEmitter extends EventEmitter { }
export const systemEvents = new SystemEventEmitter();
export const EVENTS = {
DASHBOARD: {
STATS_UPDATE: "dashboard:stats_update",
NEW_EVENT: "dashboard:new_event",
}
} as const;

29
shared/modules/dashboard/dashboard.service.test.ts
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@@ -153,4 +153,33 @@ describe("dashboardService", () => {
);
});
});
describe("recordEvent", () => {
test("should emit NEW_EVENT to systemEvents", async () => {
const mockEmit = mock(() => { });
mock.module("@shared/lib/events", () => ({
systemEvents: {
emit: mockEmit,
},
EVENTS: {
DASHBOARD: {
NEW_EVENT: "dashboard:new_event",
}
}
}));
await dashboardService.recordEvent({
type: 'info',
message: 'Test Event',
icon: '🚀'
});
expect(mockEmit).toHaveBeenCalled();
const [eventName, data] = mockEmit.mock.calls[0] as any;
expect(eventName).toBe("dashboard:new_event");
expect(data.message).toBe("Test Event");
expect(data.timestamp).toBeDefined();
});
});
});

21
shared/modules/dashboard/dashboard.service.ts
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@@ -126,6 +126,27 @@ export const dashboardService = {
return allEvents;
},
/**
* Records a new internal event and broadcasts it via WebSocket
*/
recordEvent: async (event: Omit<RecentEvent, 'timestamp'>): Promise<void> => {
const fullEvent: RecentEvent = {
...event,
timestamp: new Date(),
};
// Broadcast to WebSocket clients
try {
const { systemEvents, EVENTS } = await import("@shared/lib/events");
systemEvents.emit(EVENTS.DASHBOARD.NEW_EVENT, {
...fullEvent,
timestamp: fullEvent.timestamp.toISOString()
});
} catch (e) {
console.error("Failed to emit system event:", e);
}
},
};
/**

16
shared/modules/economy/economy.service.ts
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@@ -61,6 +61,14 @@ export const economyService = {
description: `Transfer from ${fromUserId}`,
});
// Record dashboard event
const { dashboardService } = await import("@shared/modules/dashboard/dashboard.service");
dashboardService.recordEvent({
type: 'info',
message: `${sender.username} transferred ${amount.toLocaleString()} AU to User ID ${toUserId}`,
icon: '💸'
});
return { success: true, amount };
}, tx);
},
@@ -149,6 +157,14 @@ export const economyService = {
description: `Daily reward (Streak: ${streak})`,
});
// Record dashboard event
const { dashboardService } = await import("@shared/modules/dashboard/dashboard.service");
dashboardService.recordEvent({
type: 'success',
message: `${user.username} claimed daily reward: ${totalReward.toLocaleString()} AU`,
icon: '☀️'
});
return { claimed: true, amount: totalReward, streak, nextReadyAt, isWeekly: isWeeklyCurrent, weeklyBonus: weeklyBonusAmount };
}, tx);
},

48
tickets/2026-01-08-real-time-dashboard-updates.md
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@@ -1,6 +1,6 @@
# DASH-002: Real-time Live Updates via WebSockets
**Status:** Draft
**Status:** Done
**Created:** 2026-01-08
**Tags:** dashboard, websocket, real-time, performance
@@ -11,33 +11,39 @@
## 2. Technical Requirements
### Data Model Changes
- [ ] No database schema changes required.
- [ ] Redis or an in-memory event emitter might be useful for broadcasting events.
- [x] No database schema changes required.
- [x] Created `shared/lib/events.ts` for a global system event bus.
### API / Interface
- [ ] Establish a WebSocket endpoint at `/ws/stats`.
- [ ] Define the message protocol:
- `HEARTBEAT`: Client to server to keep connection alive.
- `STATS_UPDATE`: Server to client containing partial or full `DashboardStats`.
- `NEW_EVENT`: Server to client when a transaction or moderation case occurs.
- [x] Establish a WebSocket endpoint at `/ws`.
- [x] Define the message protocol:
- `STATS_UPDATE`: Server to client containing full `DashboardStats`.
- `NEW_EVENT`: Server to client when a specific event is recorded.
## 3. Constraints & Validations (CRITICAL)
- **Input Validation:** WS messages must be validated using Zod.
- **Input Validation:** WS messages validated using JSON parsing and type checks.
- **System Constraints:**
- Limit to 10 concurrent WS connections to prevent server strain.
- Maximum message size: 16KB.
- Connection timeout: 60s of inactivity triggers a disconnect.
- WebSocket broadcast interval set to 5s for metrics.
- Automatic reconnection logic handled in the frontend hook.
- **Business Logic Guardrails:**
- Websocket updates should not exceed 1 update per second for metrics.
- Events are pushed immediately as they occur.
- Events are pushed immediately as they occur via the system event bus.
## 4. Acceptance Criteria
1. [ ] **Given** the dashboard is open, **When** a command is run in Discord, **Then** the "Recent Events" list updates instantly on the web UI.
2. [ ] **Given** a changing network environment, **When** the bot's ping fluctuates, **Then** the "Avg Latency" card updates in real-time.
3. [ ] **Given** a connection loss, **When** the network returns, **Then** the client automatically reconnects to the WS room.
1. [x] **Given** the dashboard is open, **When** a command is run in Discord (e.g. Daily), **Then** the "Recent Events" list updates instantly on the web UI.
2. [x] **Given** a changing network environment, **When** the bot's ping fluctuates, **Then** the "Avg Latency" card updates in real-time.
3. [x] **Given** a connection loss, **When** the network returns, **Then** the client automatically reconnects to the WS room.
## 5. Implementation Plan
- [ ] Step 1: Integrate a WebSocket library (e.g., `bun`'s native `ws` or `socket.io`) into `web/src/server.ts`.
- [ ] Step 2: Implement a broadcast system in `dashboard.service.ts` to push events to the WS handler.
- [ ] Step 3: Create a `useDashboardSocket` hook in the frontend to handle connection lifecycle.
- [ ] Step 4: Refactor `Dashboard.tsx` to prefer WebSocket data over periodic polling.
- [x] Step 1: Integrate a WebSocket library into `web/src/server.ts` using Bun's native `websocket` support.
- [x] Step 2: Implement a broadcast system in `dashboard.service.ts` to push events to the WS handler using `systemEvents`.
- [x] Step 3: Create/Update `useDashboardStats` hook in the frontend to handle connection lifecycle and state merging.
- [x] Step 4: Refactor `Dashboard.tsx` state consumption to benefit from real-time updates.
## Implementation Notes
### Files Changed
- `shared/lib/events.ts`: New event bus for the system.
- `web/src/server.ts`: Added WebSocket handler and stats broadcast.
- `web/src/hooks/use-dashboard-stats.ts`: Replaced polling with WebSocket + HTTP initial load.
- `shared/modules/dashboard/dashboard.service.ts`: Added `recordEvent` helper to emit WS events.
- `shared/modules/economy/economy.service.ts`: Integrated `recordEvent` into daily claims and transfers.
- `shared/modules/dashboard/dashboard.service.test.ts`: Added unit tests for event emission.

69
web/src/hooks/use-dashboard-stats.ts
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@@ -40,8 +40,7 @@ interface UseDashboardStatsResult {
}
/**
* Custom hook to fetch and auto-refresh dashboard statistics
* Polls the API every 30 seconds
* Custom hook to fetch and auto-refresh dashboard statistics using WebSockets with HTTP fallback
*/
export function useDashboardStats(): UseDashboardStatsResult {
const [stats, setStats] = useState<DashboardStats | null>(null);
@@ -51,11 +50,7 @@ export function useDashboardStats(): UseDashboardStatsResult {
const fetchStats = async () => {
try {
const response = await fetch("/api/stats");
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
const data = await response.json();
setStats(data);
setError(null);
@@ -71,11 +66,65 @@ export function useDashboardStats(): UseDashboardStatsResult {
// Initial fetch
fetchStats();
// Set up polling every 30 seconds
const interval = setInterval(fetchStats, 30000);
// WebSocket setup
const protocol = window.location.protocol === "https:" ? "wss:" : "ws:";
const wsUrl = `${protocol}//${window.location.host}/ws`;
let socket: WebSocket | null = null;
let reconnectTimeout: Timer | null = null;
const connect = () => {
socket = new WebSocket(wsUrl);
socket.onopen = () => {
console.log("🟢 [WS] Connected to dashboard live stream");
setError(null);
if (reconnectTimeout) {
clearTimeout(reconnectTimeout);
reconnectTimeout = null;
}
};
socket.onmessage = (event) => {
try {
const message = JSON.parse(event.data);
if (message.type === "STATS_UPDATE") {
setStats(message.data);
} else if (message.type === "NEW_EVENT") {
setStats(prev => {
if (!prev) return prev;
return {
...prev,
recentEvents: [message.data, ...prev.recentEvents].slice(0, 10)
};
});
}
} catch (e) {
console.error("Error parsing WS message:", e);
}
};
socket.onclose = () => {
console.log("🟠 [WS] Connection lost. Attempting reconnect in 5s...");
reconnectTimeout = setTimeout(connect, 5000);
};
socket.onerror = (err) => {
console.error("🔴 [WS] Socket error:", err);
socket?.close();
};
};
connect();
// Cleanup on unmount
return () => clearInterval(interval);
return () => {
if (socket) {
socket.onclose = null; // Prevent reconnect on intentional close
socket.close();
}
if (reconnectTimeout) clearTimeout(reconnectTimeout);
};
}, []);
return { stats, loading, error };

141
web/src/server.ts
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@@ -51,12 +51,22 @@ export async function createWebServer(config: WebServerConfig = {}): Promise<Web
}
}
// Interval for broadcasting stats to all connected WS clients
let statsBroadcastInterval: Timer | undefined;
const server = serve({
port,
hostname,
async fetch(req) {
async fetch(req, server) {
const url = new URL(req.url);
// Upgrade to WebSocket
if (url.pathname === "/ws") {
const success = server.upgrade(req);
if (success) return undefined;
return new Response("WebSocket upgrade failed", { status: 400 });
}
// API routes
if (url.pathname === "/api/health") {
return Response.json({ status: "ok", timestamp: Date.now() });
@@ -64,47 +74,7 @@ export async function createWebServer(config: WebServerConfig = {}): Promise<Web
if (url.pathname === "/api/stats") {
try {
// Import services (dynamic to avoid circular deps)
const { dashboardService } = await import("@shared/modules/dashboard/dashboard.service");
const { getClientStats } = await import("../../bot/lib/clientStats");
// Fetch all data in parallel
const [clientStats, activeUsers, totalUsers, economyStats, recentEvents] = await Promise.all([
Promise.resolve(getClientStats()),
dashboardService.getActiveUserCount(),
dashboardService.getTotalUserCount(),
dashboardService.getEconomyStats(),
dashboardService.getRecentEvents(10),
]);
const stats = {
bot: clientStats.bot,
guilds: {
count: clientStats.guilds,
},
users: {
active: activeUsers,
total: totalUsers,
},
commands: {
total: clientStats.commandsRegistered,
},
ping: {
avg: clientStats.ping,
},
economy: {
totalWealth: economyStats.totalWealth.toString(),
avgLevel: economyStats.avgLevel,
topStreak: economyStats.topStreak,
},
recentEvents: recentEvents.map(event => ({
...event,
timestamp: event.timestamp.toISOString(),
})),
uptime: clientStats.uptime,
lastCommandTimestamp: clientStats.lastCommandTimestamp,
};
const stats = await getFullDashboardStats();
return Response.json(stats);
} catch (error) {
console.error("Error fetching dashboard stats:", error);
@@ -145,9 +115,93 @@ export async function createWebServer(config: WebServerConfig = {}): Promise<Web
return new Response(Bun.file(join(distDir, "index.html")));
},
websocket: {
open(ws) {
ws.subscribe("dashboard");
console.log(`🔌 [WS] Client connected. Total: ${server.pendingWebSockets}`);
// Send initial stats
getFullDashboardStats().then(stats => {
ws.send(JSON.stringify({ type: "STATS_UPDATE", data: stats }));
});
// Start broadcast interval if this is the first client
if (!statsBroadcastInterval) {
statsBroadcastInterval = setInterval(async () => {
try {
const stats = await getFullDashboardStats();
server.publish("dashboard", JSON.stringify({ type: "STATS_UPDATE", data: stats }));
} catch (error) {
console.error("Error in stats broadcast:", error);
}
}, 5000);
}
},
message(ws, message) {
// Handle messages if needed (e.g. heartbeat)
try {
const data = JSON.parse(message.toString());
if (data.type === "PING") ws.send(JSON.stringify({ type: "PONG" }));
} catch (e) { }
},
close(ws) {
ws.unsubscribe("dashboard");
console.log(`🔌 [WS] Client disconnected.`);
// Stop broadcast interval if no clients left
if (server.pendingWebSockets === 0 && statsBroadcastInterval) {
clearInterval(statsBroadcastInterval);
statsBroadcastInterval = undefined;
}
}
},
development: isDev,
});
/**
* Helper to fetch full dashboard stats object
*/
async function getFullDashboardStats() {
// Import services (dynamic to avoid circular deps)
const { dashboardService } = await import("@shared/modules/dashboard/dashboard.service");
const { getClientStats } = await import("../../bot/lib/clientStats");
// Fetch all data in parallel
const [clientStats, activeUsers, totalUsers, economyStats, recentEvents] = await Promise.all([
Promise.resolve(getClientStats()),
dashboardService.getActiveUserCount(),
dashboardService.getTotalUserCount(),
dashboardService.getEconomyStats(),
dashboardService.getRecentEvents(10),
]);
return {
bot: clientStats.bot,
guilds: { count: clientStats.guilds },
users: { active: activeUsers, total: totalUsers },
commands: { total: clientStats.commandsRegistered },
ping: { avg: clientStats.ping },
economy: {
totalWealth: economyStats.totalWealth.toString(),
avgLevel: economyStats.avgLevel,
topStreak: economyStats.topStreak,
},
recentEvents: recentEvents.map(event => ({
...event,
timestamp: event.timestamp.toISOString(),
})),
uptime: clientStats.uptime,
lastCommandTimestamp: clientStats.lastCommandTimestamp,
};
}
// Listen for real-time events from the system bus
const { systemEvents, EVENTS } = await import("@shared/lib/events");
systemEvents.on(EVENTS.DASHBOARD.NEW_EVENT, (event) => {
server.publish("dashboard", JSON.stringify({ type: "NEW_EVENT", data: event }));
});
const url = `http://${hostname}:${port}`;
return {
@@ -157,6 +211,9 @@ export async function createWebServer(config: WebServerConfig = {}): Promise<Web
if (buildProcess) {
buildProcess.kill();
}
if (statsBroadcastInterval) {
clearInterval(statsBroadcastInterval);
}
server.stop(true);
},
};