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Runtime error
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044b758 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | import { useState, useCallback, useRef } from "react";
import { sendChatMessage } from "../services/api";
import { v4 as uuidv4 } from "uuid";
export function useChat(sessionId) {
const [messages, setMessages] = useState([]);
const [isStreaming, setIsStreaming] = useState(false);
const [streamingContent, setStreamingContent] = useState("");
const [error, setError] = useState(null);
const sendMessage = useCallback(
async (content, model, overrideSessionId) => {
if (!content.trim() || isStreaming) return;
// Use override (newly created) session id if provided
const activeSessionId = overrideSessionId || sessionId;
if (!activeSessionId) {
console.error("No session ID available");
return;
}
setError(null);
// Add user message immediately
const userMessage = {
id: uuidv4(),
role: "user",
content: content.trim(),
timestamp: new Date().toISOString(),
};
setMessages((prev) => [...prev, userMessage]);
setIsStreaming(true);
setStreamingContent("");
const assistantId = uuidv4();
try {
console.log("Sending to session:", activeSessionId);
const response = await sendChatMessage({
message: content.trim(),
session_id: activeSessionId,
model: model || "llama3",
stream: true,
});
const reader = response.body.getReader();
const decoder = new TextDecoder();
let fullContent = "";
let metadata = null;
while (true) {
const { done, value } = await reader.read();
if (done) break;
const chunk = decoder.decode(value, { stream: true });
const lines = chunk.split("\n");
for (const line of lines) {
if (!line.startsWith("data: ")) continue;
const jsonStr = line.slice(6).trim();
if (!jsonStr) continue;
try {
const event = JSON.parse(jsonStr);
if (event.type === "metadata") {
metadata = event;
} else if (event.type === "token") {
fullContent += event.content;
setStreamingContent(fullContent);
} else if (event.type === "done") {
const assistantMessage = {
id: assistantId,
role: "assistant",
content: fullContent,
timestamp: new Date().toISOString(),
metadata: metadata,
};
setMessages((prev) => [...prev, assistantMessage]);
setStreamingContent("");
} else if (event.type === "error") {
throw new Error(event.content);
}
} catch (parseError) {
if (parseError.message !== "Unexpected end of JSON input") {
console.warn("SSE parse warning:", parseError.message);
}
}
}
}
} catch (err) {
console.error("Chat error:", err);
// Extract readable error message
let errorMsg = "Something went wrong. Please try again.";
if (err.message && err.message !== "[object Object]") {
errorMsg = err.message;
}
setError(errorMsg);
setStreamingContent("");
setMessages((prev) => [
...prev,
{
id: assistantId,
role: "assistant",
content: `⚠️ Error: ${errorMsg}`,
timestamp: new Date().toISOString(),
isError: true,
},
]);
} finally {
setIsStreaming(false);
setStreamingContent("");
}
},
[sessionId, isStreaming],
);
const clearMessages = useCallback(() => {
setMessages([]);
setStreamingContent("");
setError(null);
}, []);
return {
messages,
setMessages,
isStreaming,
streamingContent,
error,
sendMessage,
clearMessages,
};
}
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