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// 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()
}
}
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