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import { useState } from "react";
import { marked } from "marked";
import DOMPurify from "dompurify";
import BotIcon from "./icons/BotIcon";
import BrainIcon from "./icons/BrainIcon";
import UserIcon from "./icons/UserIcon";
import { MathJaxContext, MathJax } from "better-react-mathjax";
import "./Chat.css";
function render(text) {
// Replace all instances of single backslashes before brackets with double backslashes
// See https://github.com/markedjs/marked/issues/546 for more information.
text = text.replace(/\\([\[\]\(\)])/g, "\\\\$1");
const result = DOMPurify.sanitize(
marked.parse(text, {
async: false,
breaks: true,
}),
);
return result;
}
function Message({ role, content, answerIndex }) {
const thinking =
answerIndex !== undefined ? content.slice(0, answerIndex) : content;
const answer = answerIndex !== undefined ? content.slice(answerIndex) : "";
const [showThinking, setShowThinking] = useState(false);
const doneThinking = answerIndex === 0 || answer.length > 0;
return (
<div className="flex items-start space-x-4">
{role === "assistant" ? (
<>
<BotIcon className="h-6 w-6 min-h-6 min-w-6 my-3 text-gray-500 dark:text-gray-300" />
<div className="bg-gray-200 dark:bg-gray-700 rounded-lg p-4">
<div className="min-h-6 text-gray-800 dark:text-gray-200 overflow-wrap-anywhere">
{answerIndex === 0 || thinking.length > 0 ? (
<>
{thinking.length > 0 && (
<div className="bg-white dark:bg-gray-800 rounded-lg flex flex-col mb-2">
<button
className="flex items-center gap-2 cursor-pointer p-4 hover:bg-gray-50 dark:hover:bg-gray-900 rounded-lg "
onClick={() => setShowThinking((prev) => !prev)}
style={{ width: showThinking ? "100%" : "auto" }}
>
<BrainIcon
className={doneThinking ? "" : "animate-pulse"}
/>
<span>
{doneThinking ? "View reasoning." : "Thinking..."}
</span>
<span className="ml-auto text-gray-700">
{showThinking ? "▲" : "▼"}
</span>
</button>
{showThinking && (
<MathJax
className="border-t border-gray-200 dark:border-gray-700 px-4 py-2"
dynamic
>
<span
className="markdown"
dangerouslySetInnerHTML={{
__html: render(thinking),
}}
/>
</MathJax>
)}
</div>
)}
{doneThinking && (
<MathJax dynamic>
<span
className="markdown"
dangerouslySetInnerHTML={{
__html: render(answer),
}}
/>
</MathJax>
)}
</>
) : (
<span className="h-6 flex items-center gap-1">
<span className="w-2.5 h-2.5 bg-gray-600 dark:bg-gray-300 rounded-full animate-pulse"></span>
<span className="w-2.5 h-2.5 bg-gray-600 dark:bg-gray-300 rounded-full animate-pulse animation-delay-200"></span>
<span className="w-2.5 h-2.5 bg-gray-600 dark:bg-gray-300 rounded-full animate-pulse animation-delay-400"></span>
</span>
)}
</div>
</div>
</>
) : (
<>
<UserIcon className="h-6 w-6 min-h-6 min-w-6 my-3 text-gray-500 dark:text-gray-300" />
<div className="bg-blue-500 text-white rounded-lg p-4">
<p className="min-h-6 overflow-wrap-anywhere">{content}</p>
</div>
</>
)}
</div>
);
}
export default function Chat({ messages }) {
const empty = messages.length === 0;
return (
<div
className={`flex-1 p-6 pb-2 max-w-[960px] w-full ${empty ? "flex flex-col items-center justify-end" : "space-y-4"}`}
>
<MathJaxContext>
{empty ? (
<div className="text-xl">Ready!</div>
) : (
messages.map((msg, i) => <Message key={`message-${i}`} {...msg} />)
)}
</MathJaxContext>
</div>
);
}
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