setup basic components
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bluemoehre
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'use client'
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import { Button } from '@/components/ui/button'
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import { ButtonGroup, ButtonGroupText } from '@/components/ui/button-group'
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import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip'
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import { cn } from '@/lib/utils'
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import { cjk } from '@streamdown/cjk'
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import { code } from '@streamdown/code'
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import { math } from '@streamdown/math'
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import { mermaid } from '@streamdown/mermaid'
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import type { UIMessage } from 'ai'
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import { ChevronLeftIcon, ChevronRightIcon } from 'lucide-react'
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import type { ComponentProps, HTMLAttributes, ReactElement } from 'react'
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import { createContext, memo, useCallback, useContext, useEffect, useMemo, useState } from 'react'
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import { Streamdown } from 'streamdown'
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export type MessageProps = HTMLAttributes<HTMLDivElement> & {
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from: UIMessage['role']
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}
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export const Message = ({ className, from, ...props }: MessageProps) => (
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<div
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className={cn(
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'group flex w-full max-w-[95%] flex-col gap-2',
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from === 'user' ? 'is-user ml-auto justify-end' : 'is-assistant',
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className
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)}
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{...props}
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/>
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)
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export type MessageContentProps = HTMLAttributes<HTMLDivElement>
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export const MessageContent = ({ children, className, ...props }: MessageContentProps) => (
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<div
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className={cn(
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'is-user:dark flex w-fit max-w-full min-w-0 flex-col gap-2 overflow-hidden text-sm',
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'group-[.is-user]:ml-auto group-[.is-user]:rounded-lg group-[.is-user]:bg-secondary group-[.is-user]:px-4 group-[.is-user]:py-3 group-[.is-user]:text-foreground',
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'group-[.is-assistant]:text-foreground',
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className
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)}
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{...props}
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>
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{children}
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</div>
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)
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export type MessageActionsProps = ComponentProps<'div'>
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export const MessageActions = ({ className, children, ...props }: MessageActionsProps) => (
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<div className={cn('flex items-center gap-1', className)} {...props}>
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{children}
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</div>
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)
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export type MessageActionProps = ComponentProps<typeof Button> & {
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tooltip?: string
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label?: string
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}
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export const MessageAction = ({
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tooltip,
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children,
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label,
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variant = 'ghost',
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size = 'icon-sm',
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...props
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}: MessageActionProps) => {
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const button = (
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<Button size={size} type="button" variant={variant} {...props}>
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{children}
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<span className="sr-only">{label || tooltip}</span>
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</Button>
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)
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if (tooltip) {
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return (
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<TooltipProvider>
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<Tooltip>
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<TooltipTrigger>{button}</TooltipTrigger>
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<TooltipContent>
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<p>{tooltip}</p>
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</TooltipContent>
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</Tooltip>
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</TooltipProvider>
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)
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}
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return button
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}
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interface MessageBranchContextType {
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currentBranch: number
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totalBranches: number
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goToPrevious: () => void
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goToNext: () => void
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branches: ReactElement[]
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setBranches: (branches: ReactElement[]) => void
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}
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const MessageBranchContext = createContext<MessageBranchContextType | null>(null)
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const useMessageBranch = () => {
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const context = useContext(MessageBranchContext)
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if (!context) {
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throw new Error('MessageBranch components must be used within MessageBranch')
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}
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return context
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}
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export type MessageBranchProps = HTMLAttributes<HTMLDivElement> & {
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defaultBranch?: number
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onBranchChange?: (branchIndex: number) => void
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}
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export const MessageBranch = ({ defaultBranch = 0, onBranchChange, className, ...props }: MessageBranchProps) => {
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const [currentBranch, setCurrentBranch] = useState(defaultBranch)
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const [branches, setBranches] = useState<ReactElement[]>([])
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const handleBranchChange = useCallback(
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(newBranch: number) => {
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setCurrentBranch(newBranch)
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onBranchChange?.(newBranch)
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},
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[onBranchChange]
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)
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const goToPrevious = useCallback(() => {
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const newBranch = currentBranch > 0 ? currentBranch - 1 : branches.length - 1
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handleBranchChange(newBranch)
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}, [currentBranch, branches.length, handleBranchChange])
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const goToNext = useCallback(() => {
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const newBranch = currentBranch < branches.length - 1 ? currentBranch + 1 : 0
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handleBranchChange(newBranch)
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}, [currentBranch, branches.length, handleBranchChange])
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const contextValue = useMemo<MessageBranchContextType>(
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() => ({
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branches,
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currentBranch,
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goToNext,
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goToPrevious,
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setBranches,
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totalBranches: branches.length,
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}),
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[branches, currentBranch, goToNext, goToPrevious]
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)
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return (
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<MessageBranchContext.Provider value={contextValue}>
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<div className={cn('grid w-full gap-2 [&>div]:pb-0', className)} {...props} />
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</MessageBranchContext.Provider>
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)
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}
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export type MessageBranchContentProps = HTMLAttributes<HTMLDivElement>
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export const MessageBranchContent = ({ children, ...props }: MessageBranchContentProps) => {
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const { currentBranch, setBranches, branches } = useMessageBranch()
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const childrenArray = useMemo(() => (Array.isArray(children) ? children : [children]), [children])
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// Use useEffect to update branches when they change
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useEffect(() => {
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if (branches.length !== childrenArray.length) {
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setBranches(childrenArray)
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}
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}, [childrenArray, branches, setBranches])
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return childrenArray.map((branch, index) => (
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<div
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className={cn('grid gap-2 overflow-hidden [&>div]:pb-0', index === currentBranch ? 'block' : 'hidden')}
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key={branch.key}
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{...props}
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>
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{branch}
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</div>
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))
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}
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export type MessageBranchSelectorProps = ComponentProps<typeof ButtonGroup>
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export const MessageBranchSelector = ({ className, ...props }: MessageBranchSelectorProps) => {
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const { totalBranches } = useMessageBranch()
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// Don't render if there's only one branch
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if (totalBranches <= 1) {
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return null
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}
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return (
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<ButtonGroup
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className={cn('[&>*:not(:first-child)]:rounded-l-md [&>*:not(:last-child)]:rounded-r-md', className)}
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orientation="horizontal"
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{...props}
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/>
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)
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}
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export type MessageBranchPreviousProps = ComponentProps<typeof Button>
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export const MessageBranchPrevious = ({ children, ...props }: MessageBranchPreviousProps) => {
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const { goToPrevious, totalBranches } = useMessageBranch()
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return (
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<Button
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aria-label="Previous branch"
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disabled={totalBranches <= 1}
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onClick={goToPrevious}
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size="icon-sm"
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type="button"
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variant="ghost"
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{...props}
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>
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{children ?? <ChevronLeftIcon size={14} />}
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</Button>
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)
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}
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export type MessageBranchNextProps = ComponentProps<typeof Button>
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export const MessageBranchNext = ({ children, ...props }: MessageBranchNextProps) => {
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const { goToNext, totalBranches } = useMessageBranch()
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return (
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<Button
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aria-label="Next branch"
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disabled={totalBranches <= 1}
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onClick={goToNext}
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size="icon-sm"
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type="button"
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variant="ghost"
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{...props}
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>
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{children ?? <ChevronRightIcon size={14} />}
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</Button>
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)
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}
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export type MessageBranchPageProps = HTMLAttributes<HTMLSpanElement>
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export const MessageBranchPage = ({ className, ...props }: MessageBranchPageProps) => {
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const { currentBranch, totalBranches } = useMessageBranch()
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return (
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<ButtonGroupText
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className={cn('border-none bg-transparent text-muted-foreground shadow-none', className)}
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{...props}
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>
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{currentBranch + 1} of {totalBranches}
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</ButtonGroupText>
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)
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}
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export type MessageResponseProps = ComponentProps<typeof Streamdown>
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const streamdownPlugins = { cjk, code, math, mermaid }
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export const MessageResponse = memo(
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({ className, ...props }: MessageResponseProps) => (
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<Streamdown
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className={cn('size-full [&>*:first-child]:mt-0 [&>*:last-child]:mb-0', className)}
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plugins={streamdownPlugins}
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{...props}
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/>
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),
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(prevProps, nextProps) => prevProps.children === nextProps.children && nextProps.isAnimating === prevProps.isAnimating
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)
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MessageResponse.displayName = 'MessageResponse'
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export type MessageToolbarProps = ComponentProps<'div'>
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export const MessageToolbar = ({ className, children, ...props }: MessageToolbarProps) => (
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<div className={cn('mt-4 flex w-full items-center justify-between gap-4', className)} {...props}>
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{children}
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</div>
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)
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