256 lines
10 KiB
TypeScript
256 lines
10 KiB
TypeScript
import { ReactNode, useCallback, useEffect, useState, useRef } from 'react'
|
|
import { Message } from '@/api/lightrag'
|
|
import useTheme from '@/hooks/useTheme'
|
|
import Button from '@/components/ui/Button'
|
|
import { cn } from '@/lib/utils'
|
|
|
|
import ReactMarkdown from 'react-markdown'
|
|
import remarkGfm from 'remark-gfm'
|
|
import rehypeReact from 'rehype-react'
|
|
import remarkMath from 'remark-math'
|
|
import mermaid from 'mermaid'
|
|
|
|
import type { Element } from 'hast'
|
|
|
|
import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter'
|
|
import { oneLight, oneDark } from 'react-syntax-highlighter/dist/cjs/styles/prism'
|
|
|
|
import { LoaderIcon, CopyIcon } from 'lucide-react'
|
|
import { useTranslation } from 'react-i18next'
|
|
|
|
export type MessageWithError = Message & {
|
|
isError?: boolean
|
|
}
|
|
|
|
export const ChatMessage = ({ message }: { message: MessageWithError }) => {
|
|
const { t } = useTranslation()
|
|
|
|
const handleCopyMarkdown = useCallback(async () => {
|
|
if (message.content) {
|
|
try {
|
|
await navigator.clipboard.writeText(message.content)
|
|
} catch (err) {
|
|
console.error(t('chat.copyError'), err)
|
|
}
|
|
}
|
|
}, [message, t]) // Added t to dependency array
|
|
|
|
return (
|
|
<div
|
|
className={`max-w-[80%] rounded-lg px-4 py-2 ${
|
|
message.role === 'user'
|
|
? 'bg-primary text-primary-foreground'
|
|
: message.isError
|
|
? 'bg-red-100 text-red-600 dark:bg-red-950 dark:text-red-400'
|
|
: 'bg-muted'
|
|
}`}
|
|
>
|
|
<pre className="relative break-words whitespace-pre-wrap">
|
|
<ReactMarkdown
|
|
className="dark:prose-invert max-w-none text-sm" // Removed text-base as it might conflict
|
|
remarkPlugins={[remarkGfm, remarkMath]}
|
|
// Removed rehypeReact as it's often not needed with custom components and can cause issues
|
|
skipHtml={false}
|
|
components={{
|
|
code: CodeHighlight
|
|
}}
|
|
>
|
|
{message.content}
|
|
</ReactMarkdown>
|
|
{message.role === 'assistant' && message.content && message.content.length > 0 && ( // Added check for message.content existence
|
|
<Button
|
|
onClick={handleCopyMarkdown}
|
|
className="absolute right-0 bottom-0 size-6 rounded-md opacity-20 transition-opacity hover:opacity-100"
|
|
tooltip={t('retrievePanel.chatMessage.copyTooltip')}
|
|
variant="default"
|
|
size="icon"
|
|
>
|
|
<CopyIcon className="size-4" /> {/* Explicit size */}
|
|
</Button>
|
|
)}
|
|
</pre>
|
|
{message.content === '' && <LoaderIcon className="animate-spin duration-2000" />} {/* Check for empty string specifically */}
|
|
</div>
|
|
)
|
|
}
|
|
|
|
interface CodeHighlightProps {
|
|
inline?: boolean
|
|
className?: string
|
|
children?: ReactNode
|
|
node?: Element // Keep node for inline check
|
|
}
|
|
|
|
// Helper function remains the same
|
|
const isInlineCode = (node?: Element): boolean => {
|
|
if (!node || !node.children) return false;
|
|
const textContent = node.children
|
|
.filter((child) => child.type === 'text')
|
|
.map((child) => (child as any).value)
|
|
.join('');
|
|
// Consider inline if it doesn't contain newline or is very short
|
|
return !textContent.includes('\n') || textContent.length < 40;
|
|
};
|
|
|
|
|
|
const CodeHighlight = ({ className, children, node, ...props }: CodeHighlightProps) => {
|
|
const { theme } = useTheme();
|
|
const match = className?.match(/language-(\w+)/);
|
|
const language = match ? match[1] : undefined;
|
|
const inline = isInlineCode(node); // Use the helper function
|
|
const mermaidRef = useRef<HTMLDivElement>(null);
|
|
const debounceTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null); // Use ReturnType for better typing
|
|
|
|
// Handle Mermaid rendering with debounce
|
|
useEffect(() => {
|
|
// Clear any existing timer when dependencies change
|
|
if (debounceTimerRef.current) {
|
|
clearTimeout(debounceTimerRef.current);
|
|
}
|
|
|
|
if (language === 'mermaid' && mermaidRef.current) {
|
|
const container = mermaidRef.current; // Capture ref value for use inside timeout/callbacks
|
|
|
|
// Set a new timer to render after a short delay
|
|
debounceTimerRef.current = setTimeout(() => {
|
|
// Ensure container still exists when timer fires
|
|
if (!container) return;
|
|
|
|
try {
|
|
// Initialize mermaid config (safe to call multiple times)
|
|
mermaid.initialize({
|
|
startOnLoad: false,
|
|
theme: theme === 'dark' ? 'dark' : 'default',
|
|
securityLevel: 'loose',
|
|
});
|
|
|
|
// Show loading indicator while processing
|
|
container.innerHTML = '<div class="flex justify-center items-center p-4"><svg class="animate-spin h-5 w-5 text-primary" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24"><circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle><path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path></svg></div>';
|
|
|
|
// Preprocess mermaid content
|
|
const rawContent = String(children).replace(/\n$/, '').trim(); // Trim whitespace as well
|
|
|
|
// Heuristic check for potentially complete graph definition
|
|
// Looks for graph type declaration and some content beyond it.
|
|
const looksPotentiallyComplete = rawContent.length > 10 && (
|
|
rawContent.startsWith('graph') ||
|
|
rawContent.startsWith('sequenceDiagram') ||
|
|
rawContent.startsWith('classDiagram') ||
|
|
rawContent.startsWith('stateDiagram') ||
|
|
rawContent.startsWith('gantt') ||
|
|
rawContent.startsWith('pie') ||
|
|
rawContent.startsWith('flowchart') ||
|
|
rawContent.startsWith('erDiagram')
|
|
);
|
|
|
|
|
|
if (!looksPotentiallyComplete) {
|
|
console.log("Mermaid content might be incomplete, skipping render attempt:", rawContent);
|
|
// Keep loading indicator or show a message
|
|
// container.innerHTML = '<p class="text-sm text-muted-foreground">Waiting for complete diagram...</p>';
|
|
return; // Don't attempt to render potentially incomplete content
|
|
}
|
|
|
|
const processedContent = rawContent
|
|
.split('\n')
|
|
.map(line => {
|
|
const trimmedLine = line.trim();
|
|
// Keep subgraph processing
|
|
if (trimmedLine.startsWith('subgraph')) {
|
|
const parts = trimmedLine.split(' ');
|
|
if (parts.length > 1) {
|
|
const title = parts.slice(1).join(' ').replace(/["']/g, '');
|
|
return `subgraph "${title}"`;
|
|
}
|
|
}
|
|
return trimmedLine;
|
|
})
|
|
.filter(line => !line.trim().startsWith('linkStyle')) // Keep filtering linkStyle
|
|
.join('\n');
|
|
|
|
console.log("Rendering Mermaid with debounced, filtered content:", processedContent);
|
|
|
|
const mermaidId = `mermaid-${Date.now()}`;
|
|
mermaid.render(mermaidId, processedContent)
|
|
.then(({ svg, bindFunctions }) => {
|
|
// Check ref again inside async callback
|
|
// Ensure the container is still the one we intended to update
|
|
if (mermaidRef.current === container) {
|
|
container.innerHTML = svg;
|
|
if (bindFunctions) {
|
|
try { // Add try-catch around bindFunctions as it can also throw
|
|
bindFunctions(container);
|
|
} catch (bindError) {
|
|
console.error('Mermaid bindFunctions error:', bindError);
|
|
// Optionally display a message in the container
|
|
container.innerHTML += `<p class="text-orange-500 text-xs">Diagram interactions might be limited.</p>`;
|
|
}
|
|
}
|
|
} else {
|
|
console.log("Mermaid container changed before rendering completed.");
|
|
}
|
|
})
|
|
.catch(error => {
|
|
console.error('Mermaid rendering promise error (debounced):', error);
|
|
console.error('Failed content (debounced):', processedContent);
|
|
if (mermaidRef.current === container) {
|
|
const errorMessage = error instanceof Error ? error.message : String(error);
|
|
// Make error display more robust
|
|
const errorPre = document.createElement('pre');
|
|
errorPre.className = 'text-red-500 text-xs whitespace-pre-wrap break-words';
|
|
errorPre.textContent = `Mermaid diagram error: ${errorMessage}\n\nContent:\n${processedContent}`;
|
|
container.innerHTML = ''; // Clear previous content
|
|
container.appendChild(errorPre);
|
|
}
|
|
});
|
|
|
|
} catch (error) {
|
|
console.error('Mermaid synchronous error (debounced):', error);
|
|
console.error('Failed content (debounced):', String(children));
|
|
if (mermaidRef.current === container) {
|
|
const errorMessage = error instanceof Error ? error.message : String(error);
|
|
const errorPre = document.createElement('pre');
|
|
errorPre.className = 'text-red-500 text-xs whitespace-pre-wrap break-words';
|
|
errorPre.textContent = `Mermaid diagram setup error: ${errorMessage}`;
|
|
container.innerHTML = ''; // Clear previous content
|
|
container.appendChild(errorPre);
|
|
}
|
|
}
|
|
}, 300); // 300ms debounce delay
|
|
}
|
|
|
|
// Cleanup function to clear the timer
|
|
return () => {
|
|
if (debounceTimerRef.current) {
|
|
clearTimeout(debounceTimerRef.current);
|
|
}
|
|
};
|
|
}, [language, children, theme]); // Dependencies
|
|
|
|
// Render based on language type
|
|
if (language === 'mermaid') {
|
|
// Container for Mermaid diagram
|
|
return <div className="mermaid-diagram-container my-4 overflow-x-auto" ref={mermaidRef}></div>;
|
|
}
|
|
|
|
// Handle non-Mermaid code blocks
|
|
return !inline ? (
|
|
<SyntaxHighlighter
|
|
style={theme === 'dark' ? oneDark : oneLight}
|
|
PreTag="div" // Use div for block code
|
|
language={language}
|
|
{...props}
|
|
>
|
|
{String(children).replace(/\n$/, '')}
|
|
</SyntaxHighlighter>
|
|
) : (
|
|
// Handle inline code
|
|
<code
|
|
className={cn(className, 'mx-1 rounded-sm bg-muted px-1 py-0.5 text-sm')} // Adjusted styling for inline code
|
|
{...props}
|
|
>
|
|
{children}
|
|
</code>
|
|
);
|
|
};
|