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"use client";
import type { Message as TMessage } from "ai";
import { memo, useCallback, useEffect, useState } from "react";
import equal from "fast-deep-equal";
import { Markdown } from "./markdown";
import { cn } from "@/lib/utils";
import { ChevronDownIcon, ChevronUpIcon, LightbulbIcon, BrainIcon } from "lucide-react";
import { SpinnerIcon } from "./icons";
import { ToolInvocation } from "./tool-invocation";
import { CopyButton } from "./copy-button";
interface ReasoningPart {
type: "reasoning";
reasoning: string;
details: Array<{ type: "text"; text: string }>;
}
interface ReasoningMessagePartProps {
part: ReasoningPart;
isReasoning: boolean;
}
interface ThinkingPart {
type: "thinking";
thinking: string;
details: Array<{ type: "text"; text: string }>;
}
interface ThinkingMessagePartProps {
part: ThinkingPart;
isThinking: boolean;
}
export function ThinkingMessagePart({
part,
isThinking,
}: ThinkingMessagePartProps) {
const [isExpanded, setIsExpanded] = useState(false);
const memoizedSetIsExpanded = useCallback((value: boolean) => {
setIsExpanded(value);
}, []);
useEffect(() => {
memoizedSetIsExpanded(isThinking);
}, [isThinking, memoizedSetIsExpanded]);
return (
<div className="flex flex-col mb-2 group">
{isThinking ? (
<div className={cn(
"flex items-center gap-2.5 rounded-full py-1.5 px-3",
"bg-primary/10 text-primary",
"border border-primary/20 w-fit"
)}>
<div className="animate-spin h-3.5 w-3.5">
<SpinnerIcon />
</div>
<div className="text-xs font-medium tracking-tight">Thinking...</div>
</div>
) : (
<button
onClick={() => setIsExpanded(!isExpanded)}
className={cn(
"flex items-center justify-between w-full",
"rounded-md py-2 px-3 mb-0.5",
"bg-muted/50 border border-border/60 hover:border-border/80",
"transition-all duration-150 cursor-pointer",
isExpanded ? "bg-muted border-primary/20" : ""
)}
>
<div className="flex items-center gap-2.5">
<div className={cn(
"flex items-center justify-center w-6 h-6 rounded-full",
"bg-primary/10",
"text-primary ring-1 ring-primary/20",
)}>
<BrainIcon className="h-3.5 w-3.5" />
</div>
<div className="text-sm font-medium text-foreground flex items-center gap-1.5">
Thinking
<span className="text-xs text-muted-foreground font-normal">
(click to {isExpanded ? "hide" : "view"})
</span>
</div>
</div>
<div className={cn(
"flex items-center justify-center",
"rounded-full p-0.5 w-5 h-5",
"text-muted-foreground hover:text-foreground",
"bg-background/80 border border-border/50",
"transition-colors",
)}>
{isExpanded ? (
<ChevronDownIcon className="h-3 w-3" />
) : (
<ChevronUpIcon className="h-3 w-3" />
)}
</div>
</button>
)}
{isExpanded && (
<div
className={cn(
"text-sm text-muted-foreground flex flex-col gap-2",
"pl-2.5 ml-0.5 mt-2",
"border-l border-primary/30"
)}
>
{part.details.map((detail, detailIndex) =>
detail.type === "text" ? (
<div key={detailIndex} className="px-2 py-1.5 bg-muted/10 rounded-md border border-border/30">
<Markdown>{detail.text}</Markdown>
</div>
) : (
"<redacted>"
),
)}
</div>
)}
</div>
);
}
export function ReasoningMessagePart({
part,
isReasoning,
}: ReasoningMessagePartProps) {
const [isExpanded, setIsExpanded] = useState(false);
const memoizedSetIsExpanded = useCallback((value: boolean) => {
setIsExpanded(value);
}, []);
useEffect(() => {
memoizedSetIsExpanded(isReasoning);
}, [isReasoning, memoizedSetIsExpanded]);
return (
<div className="flex flex-col mb-2 group">
{isReasoning ? (
<div className={cn(
"flex items-center gap-2.5 rounded-full py-1.5 px-3",
"bg-indigo-50/50 dark:bg-indigo-900/10 text-indigo-700 dark:text-indigo-300",
"border border-indigo-200/50 dark:border-indigo-700/20 w-fit"
)}>
<div className="animate-spin h-3.5 w-3.5">
<SpinnerIcon />
</div>
<div className="text-xs font-medium tracking-tight">Thinking...</div>
</div>
) : (
<button
onClick={() => setIsExpanded(!isExpanded)}
className={cn(
"flex items-center justify-between w-full",
"rounded-md py-2 px-3 mb-0.5",
"bg-muted/50 border border-border/60 hover:border-border/80",
"transition-all duration-150 cursor-pointer",
isExpanded ? "bg-muted border-primary/20" : ""
)}
>
<div className="flex items-center gap-2.5">
<div className={cn(
"flex items-center justify-center w-6 h-6 rounded-full",
"bg-amber-50 dark:bg-amber-900/20",
"text-amber-600 dark:text-amber-400 ring-1 ring-amber-200 dark:ring-amber-700/30",
)}>
<LightbulbIcon className="h-3.5 w-3.5" />
</div>
<div className="text-sm font-medium text-foreground flex items-center gap-1.5">
Reasoning
<span className="text-xs text-muted-foreground font-normal">
(click to {isExpanded ? "hide" : "view"})
</span>
</div>
</div>
<div className={cn(
"flex items-center justify-center",
"rounded-full p-0.5 w-5 h-5",
"text-muted-foreground hover:text-foreground",
"bg-background/80 border border-border/50",
"transition-colors",
)}>
{isExpanded ? (
<ChevronDownIcon className="h-3 w-3" />
) : (
<ChevronUpIcon className="h-3 w-3" />
)}
</div>
</button>
)}
{isExpanded && (
<div
className={cn(
"text-sm text-muted-foreground flex flex-col gap-2",
"pl-3.5 ml-0.5 mt-1",
"border-l border-amber-200/50 dark:border-amber-700/30"
)}
>
<div className="text-xs text-muted-foreground/70 pl-1 font-medium">
The assistant's thought process:
</div>
{part.details.map((detail, detailIndex) =>
detail.type === "text" ? (
<div key={detailIndex} className="px-2 py-1.5 bg-muted/10 rounded-md border border-border/30">
<Markdown>{detail.text}</Markdown>
</div>
) : (
"<redacted>"
),
)}
</div>
)}
</div>
);
}
const PurePreviewMessage = ({
message,
isLatestMessage,
status,
}: {
message: TMessage;
isLoading: boolean;
status: "error" | "submitted" | "streaming" | "ready";
isLatestMessage: boolean;
}) => {
// Create a string with all text parts for copy functionality
const getMessageText = () => {
if (!message.parts) return "";
return message.parts
.filter((part: { type: string; }) => part.type === "text")
.map((part: { type: string; text: any; }) => (part.type === "text" ? part.text : ""))
.join("\n\n");
};
// Only show copy button if the message is from the assistant and not currently streaming
const shouldShowCopyButton = message.role === "assistant" && (!isLatestMessage || status !== "streaming");
return (
<div
className={cn(
"w-full mx-auto sm:px-4 group/message",
message.role === "assistant" ? "mb-8" : "mb-6"
)}
data-role={message.role}
>
<div
className={cn(
"flex gap-4 w-full group-data-[role=user]/message:ml-auto group-data-[role=user]/message:max-w-2xl",
"group-data-[role=user]/message:w-fit",
)}
>
<div className="flex flex-col w-full space-y-3">
{message.content &&
message.content
.split(/(<think>[\s\S]*?(?:<\/think>|$))/g)
.map((part: string, i: number) => {
if (part.startsWith("<think>")) {
const isClosed = part.endsWith("</think>");
const thinkingContent = part.slice(
7,
isClosed ? -8 : undefined,
);
return (
<ThinkingMessagePart
key={`message-${message.id}-part-${i}`}
part={{
type: "thinking",
thinking: thinkingContent,
details: [{ type: "text", text: thinkingContent }],
}}
isThinking={status === "streaming" && !isClosed}
/>
);
} else if (part.trim()) {
return (
<div
key={`message-${message.id}-part-${i}`}
className="flex flex-row gap-2 items-start w-full"
>
<div
className={cn("flex flex-col gap-3 w-full", {
"bg-secondary text-secondary-foreground px-4 py-1.5 rounded-2xl":
message.role === "user",
})}
>
<Markdown>{part}</Markdown>
</div>
</div>
);
}
return null;
})}
{shouldShowCopyButton && (
<div className="flex justify-start mt-2">
<CopyButton text={getMessageText()} />
</div>
)}
</div>
</div>
</div>
);
};
export const Message = memo(PurePreviewMessage, (prevProps, nextProps) => {
if (prevProps.status !== nextProps.status) return false;
if (prevProps.isLoading !== nextProps.isLoading) return false;
if (prevProps.isLatestMessage !== nextProps.isLatestMessage) return false;
if (prevProps.message.annotations !== nextProps.message.annotations) return false;
if (prevProps.message.id !== nextProps.message.id) return false;
if (!equal(prevProps.message.parts, nextProps.message.parts)) return false;
return true;
});
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