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Rami Bitar
360
components/ai-elements/message.tsx
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360
components/ai-elements/message.tsx
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"use client";
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import { Button } from "@/components/ui/button";
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import {
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ButtonGroup,
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ButtonGroupText,
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} from "@/components/ui/button-group";
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import {
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Tooltip,
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TooltipContent,
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TooltipProvider,
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TooltipTrigger,
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} 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 {
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createContext,
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memo,
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useCallback,
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useContext,
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useEffect,
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useMemo,
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useState,
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} 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 = ({
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children,
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className,
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...props
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}: MessageContentProps) => (
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<div
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className={cn(
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"is-user:dark flex w-fit min-w-0 max-w-full 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 = ({
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className,
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children,
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...props
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}: 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 asChild>{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>(
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null
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);
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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(
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"MessageBranch components must be used within MessageBranch"
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);
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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 = ({
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defaultBranch = 0,
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onBranchChange,
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className,
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...props
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}: 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 =
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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 =
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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
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className={cn("grid w-full gap-2 [&>div]:pb-0", className)}
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{...props}
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/>
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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 = ({
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children,
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...props
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}: MessageBranchContentProps) => {
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const { currentBranch, setBranches, branches } = useMessageBranch();
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const childrenArray = useMemo(
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() => (Array.isArray(children) ? children : [children]),
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[children]
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);
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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(
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"grid gap-2 overflow-hidden [&>div]:pb-0",
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index === currentBranch ? "block" : "hidden"
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)}
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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 = ({
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className,
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...props
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}: 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(
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"[&>*:not(:first-child)]:rounded-l-md [&>*:not(:last-child)]:rounded-r-md",
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className
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)}
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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 = ({
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children,
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...props
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}: 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 = ({
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children,
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...props
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}: 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 = ({
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className,
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...props
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}: 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(
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"border-none bg-transparent text-muted-foreground shadow-none",
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className
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)}
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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(
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"size-full [&>*:first-child]:mt-0 [&>*:last-child]:mb-0",
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className
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)}
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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) =>
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prevProps.children === nextProps.children &&
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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 = ({
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className,
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children,
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...props
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}: MessageToolbarProps) => (
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<div
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className={cn(
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"mt-4 flex w-full items-center justify-between gap-4",
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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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