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0f226f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | /**
* WebSocket chat hook — manages connection lifecycle, reconnection,
* heartbeat, and streaming message assembly.
*/
"use client";
import { useCallback, useEffect, useRef, useState } from "react";
import { createChatWebSocket } from "@/lib/api";
export type WsStatus = "connecting" | "connected" | "disconnected" | "error";
interface UseWebSocketChatOptions {
userId?: string;
onChunk: (chunk: string) => void;
onStart: () => void;
onEnd: () => void;
onError: (msg: string) => void;
}
export function useWebSocketChat({
userId,
onChunk,
onStart,
onEnd,
onError,
}: UseWebSocketChatOptions) {
const wsRef = useRef<WebSocket | null>(null);
const [status, setStatus] = useState<WsStatus>("disconnected");
const reconnectTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
const heartbeatTimer = useRef<ReturnType<typeof setInterval> | null>(null);
const reconnectAttempts = useRef(0);
const MAX_RECONNECT = 5;
const isMounted = useRef(true);
const clearTimers = () => {
if (reconnectTimer.current) clearTimeout(reconnectTimer.current);
if (heartbeatTimer.current) clearInterval(heartbeatTimer.current);
};
const startHeartbeat = (ws: WebSocket) => {
heartbeatTimer.current = setInterval(() => {
if (ws.readyState === WebSocket.OPEN) {
ws.send(JSON.stringify({ type: "ping" }));
}
}, 25000); // ping every 25s
};
const connect = useCallback(() => {
if (!isMounted.current) return;
if (wsRef.current?.readyState === WebSocket.OPEN) return;
setStatus("connecting");
const ws = createChatWebSocket(userId);
wsRef.current = ws;
ws.onopen = () => {
if (!isMounted.current) return;
setStatus("connected");
reconnectAttempts.current = 0;
startHeartbeat(ws);
};
ws.onmessage = (event) => {
if (!isMounted.current) return;
try {
const msg = JSON.parse(event.data);
switch (msg.type) {
case "chat_start":
onStart();
break;
case "chat_chunk":
if (msg.content) onChunk(msg.content);
break;
case "chat_end":
onEnd();
break;
case "pong":
break; // heartbeat ack
case "error":
onError(msg.message || "Unknown error");
break;
}
} catch {
// ignore malformed messages
}
};
ws.onerror = () => {
if (!isMounted.current) return;
setStatus("error");
};
ws.onclose = (event) => {
if (!isMounted.current) return;
clearTimers();
setStatus("disconnected");
// Reconnect with exponential backoff (unless intentional close)
if (event.code !== 1000 && reconnectAttempts.current < MAX_RECONNECT) {
const delay = Math.min(1000 * 2 ** reconnectAttempts.current, 30000);
reconnectAttempts.current++;
reconnectTimer.current = setTimeout(connect, delay);
}
};
}, [userId, onChunk, onStart, onEnd, onError]);
const disconnect = useCallback(() => {
isMounted.current = false;
clearTimers();
if (wsRef.current) {
wsRef.current.close(1000, "Component unmounted");
wsRef.current = null;
}
}, []);
const sendMessage = useCallback((message: string) => {
if (wsRef.current?.readyState === WebSocket.OPEN) {
wsRef.current.send(JSON.stringify({ type: "chat", message }));
return true;
}
return false;
}, []);
useEffect(() => {
isMounted.current = true;
connect();
return () => {
disconnect();
};
}, [connect, disconnect]);
return { status, sendMessage, reconnect: connect };
}
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