Initial commit

1 files changed, 69 insertions, 0 deletions

diff --git a/frontend/src/services/ws.ts b/frontend/src/services/ws.ts
new file mode 100644
index 0000000..7d10512
--- /dev/null
+++ b/frontend/src/services/ws.ts
@@ -0,0 +1,69 @@
+// Minimal WS client with auto-reconnect for Rust backend interoperability.
+// Point URL to your Rust server: ws://localhost:8080/ws (example)
+
+type Listener = (data: any) => void
+
+export class VNWebSocket {
+  private url: string
+  private ws: WebSocket | null = null
+  private reconnectDelay = 1000
+  private maxReconnectDelay = 8000
+  private shouldReconnect = true
+  private listeners: Record<string, Listener[]> = {}
+
+  constructor(url: string) {
+    this.url = url
+  }
+
+  on(event: 'open' | 'close' | 'error' | 'message', cb: Listener) {
+    if (!this.listeners[event]) this.listeners[event] = []
+    this.listeners[event].push(cb)
+  }
+
+  private emit(event: string, data?: any) {
+    ;(this.listeners[event] || []).forEach(cb => cb(data))
+  }
+
+  connect() {
+    this.ws = new WebSocket(this.url)
+
+    this.ws.addEventListener('open', () => {
+      this.emit('open')
+      this.reconnectDelay = 1000
+    })
+
+    this.ws.addEventListener('message', (evt) => {
+      try {
+        const parsed = JSON.parse(evt.data)
+        this.emit('message', parsed)
+      } catch {
+        this.emit('message', evt.data)
+      }
+    })
+
+    this.ws.addEventListener('close', () => {
+      this.emit('close')
+      if (this.shouldReconnect) {
+        setTimeout(() => this.connect(), this.reconnectDelay)
+        this.reconnectDelay = Math.min(this.reconnectDelay * 2, this.maxReconnectDelay)
+      }
+    })
+
+    this.ws.addEventListener('error', (e) => {
+      this.emit('error', e)
+      this.ws?.close()
+    })
+  }
+
+  send(data: any) {
+    const payload = typeof data === 'string' ? data : JSON.stringify(data)
+    if (this.ws && this.ws.readyState === WebSocket.OPEN) {
+      this.ws.send(payload)
+    }
+  }
+
+  close() {
+    this.shouldReconnect = false
+    this.ws?.close()
+  }
+}