import {
memo,
useMemo,
useRef,
useState,
type ComponentPropsWithoutRef,
} from 'react'
import ReactMarkdown, { type Components } from 'react-markdown'
import remarkGfm from 'remark-gfm'
import remarkBreaks from 'remark-breaks'
import rehypeHighlight from 'rehype-highlight'
import { Check, Copy } from 'lucide-react'
import 'highlight.js/styles/atom-one-dark.css'
import type {
MessagePart,
ToolInvocation,
} from './ChatPanel.stream'
type MessageTurnProps = {
role: 'user' | 'assistant' | 'system'
content: string
parts?: unknown[]
isStreaming: boolean
}
/** Finished turns remain memoized while the active turn streams token-by-token. */
export const MessageTurn = memo(function MessageTurn({
role,
content,
parts,
isStreaming,
}: MessageTurnProps) {
const orderedParts = useMemo(
() => normalizeMessageParts(parts, content),
[parts, content],
)
if (role === 'user') {
return (
)
}
if (role === 'system') {
const summary = content.replace(/^Earlier conversation summary:\n?/, '')
return (
Earlier conversation summary
{summary}
)
}
return (
{orderedParts.map((part, index) => {
if (part.type === 'text') {
if (!part.text) return null
return {part.text}
}
return
})}
{isStreaming && }
)
})
export function EmptyState({
prompts,
onPick,
}: {
prompts: string[]
onPick: (prompt: string) => void
}) {
return (
How can I help?
I can inspect collections and help update records using your permissions.
Try
{prompts.map((prompt) => (
))}
)
}
export function ThinkingIndicator() {
return (
Thinking
)
}
function normalizeMessageParts(parts: unknown[] | undefined, content: string): MessagePart[] {
const validParts = Array.isArray(parts) ? parts.filter(isMessagePart) : []
if (validParts.length === 0) {
return content ? [{ type: 'text', text: content }] : []
}
if (validParts.some((part) => part.type === 'text') || !content) return validParts
return [...validParts, { type: 'text', text: content }]
}
function isMessagePart(value: unknown): value is MessagePart {
if (!value || typeof value !== 'object') return false
const candidate = value as Record
if (candidate.type === 'text') return typeof candidate.text === 'string'
if (candidate.type !== 'tool-invocation') return false
return (
typeof candidate.toolCallId === 'string' &&
isToolInvocation(candidate.toolInvocation)
)
}
function isToolInvocation(value: unknown): value is ToolInvocation {
if (!value || typeof value !== 'object') return false
const candidate = value as Record
return (
typeof candidate.toolName === 'string' &&
(candidate.state === 'call' || candidate.state === 'result')
)
}
function MarkdownText({ children }: { children: string }) {
return (
{children}
)
}
function LiveIndicator() {
return (
Working
)
}
function ToolRow({ invocation }: { invocation: ToolInvocation }) {
const done = invocation.state === 'result'
const failed = done && isFailedResult(invocation.result)
const { label, path } = describeTool(invocation.toolName, invocation.args)
return (
{!done
?
: failed
?
: }
{label}
{path && (
{path}
)}
{failed && Failed}
{!done && }
)
}
function isFailedResult(result: unknown): boolean {
return (
typeof result === 'object' &&
result !== null &&
'success' in result &&
result.success === false
)
}
function describeTool(
name: string,
args: unknown,
): { label: string; path?: string } {
const values = args && typeof args === 'object'
? args as Record
: undefined
const collection = typeof values?.collection === 'string'
? values.collection
: undefined
const recordId = typeof values?.recordId === 'string'
? values.recordId
: undefined
const recordPath = collection && recordId
? `${collection}/${recordId}`
: collection
switch (name) {
case 'schema_list':
return { label: 'Listing collections' }
case 'schema_describe':
return { label: 'Describing', path: collection }
case 'records_query':
return { label: 'Reading', path: collection }
case 'records_get':
return { label: 'Fetching', path: recordPath }
case 'records_create':
return { label: 'Creating record in', path: collection }
case 'records_update':
return { label: 'Updating', path: recordPath }
case 'records_delete':
return { label: 'Deleting', path: recordPath }
case 'user_current':
return { label: 'Checking current user' }
default:
return { label: 'Running', path: name }
}
}
function EllipsisDots() {
return (
)
}
function Spinner() {
return (
)
}
function FailDot() {
return
}
type MarkdownElementProps =
ComponentPropsWithoutRef & { node?: unknown }
const CodeBlock = ({ children, node: _node, ...props }: MarkdownElementProps<'pre'>) => {
const ref = useRef(null)
const [copied, setCopied] = useState(false)
function copy() {
const text = ref.current?.textContent
if (!text) return
void navigator.clipboard.writeText(text).then(() => {
setCopied(true)
setTimeout(() => setCopied(false), 1_500)
}).catch(() => {
// Clipboard access can be denied outside a secure context.
})
}
return (
{children}
)
}
const ExternalLink = ({
children,
href,
node: _node,
...props
}: MarkdownElementProps<'a'>) => (
{children}
)
const REMARK_PLUGINS = [remarkGfm, remarkBreaks]
const REHYPE_PLUGINS = [rehypeHighlight]
const MARKDOWN_COMPONENTS = { pre: CodeBlock, a: ExternalLink } satisfies Components