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import { useCallback, useMemo, useRef, useState } from "react";
import { useTranslations } from "next-intl";
import { ChatMention } from "app-types/chat";
import { DefaultToolName } from "lib/ai/tools";
import { cn, noop } from "lib/utils";
import equal from "lib/equal";
import { ChevronDownIcon, HammerIcon, Loader, XIcon } from "lucide-react";
import { ChatMentionInputSuggestion } from "@/components/chat-mention-input";
import { DefaultToolIcon } from "@/components/default-tool-icon";
import { MCPIcon } from "ui/mcp-icon";
import { Avatar, AvatarFallback, AvatarImage } from "ui/avatar";
interface AgentToolSelectorProps {
mentions: ChatMention[];
isLoading?: boolean;
disabled?: boolean;
hasEditAccess?: boolean;
onChange: (mentions: ChatMention[]) => void;
}
export function AgentToolSelector({
mentions,
isLoading = false,
disabled = false,
hasEditAccess = true,
onChange,
}: AgentToolSelectorProps) {
const t = useTranslations();
const triggerRef = useRef<HTMLDivElement>(null);
const [open, setOpen] = useState(false);
const triggerRect = useMemo(() => {
return triggerRef.current?.getBoundingClientRect();
}, [open]);
const handleSelectMention = useCallback(
(item: { label: string; id: string }) => {
const mention = JSON.parse(item.id) as ChatMention;
const newMentions = [...mentions];
const index = newMentions.findIndex((m) => equal(m, mention));
if (index !== -1) {
newMentions.splice(index, 1);
} else {
newMentions.push(mention);
}
onChange(newMentions);
},
[mentions, onChange],
);
const handleDeleteMention = useCallback(
(mention: ChatMention) => {
onChange(mentions.filter((m) => !equal(m, mention)));
},
[mentions, onChange],
);
const selectedIds = useMemo(() => {
return mentions.map((m) => JSON.stringify(m));
}, [mentions]);
const selectedMentions = useMemo(() => {
return mentions.map((m, i) => (
<div
key={i}
className={cn(
"text-xs flex items-center gap-1 px-2 py-1 rounded-sm bg-background",
hasEditAccess &&
"hover:ring hover:ring-destructive group cursor-pointer",
)}
onClick={(e) => {
e.stopPropagation();
if (hasEditAccess) {
handleDeleteMention(m);
}
}}
>
<div className="p-0.5">
{m.type === "defaultTool" ? (
<DefaultToolIcon
name={m.name as DefaultToolName}
className="size-3"
/>
) : m.type === "mcpServer" ? (
<MCPIcon className="size-3" />
) : m.type === "workflow" ? (
<Avatar
style={m.icon?.style}
className="size-3 ring-[1px] ring-input rounded-full"
>
<AvatarImage src={m.icon?.value} />
<AvatarFallback>{m.name.slice(0, 1)}</AvatarFallback>
</Avatar>
) : (
<HammerIcon className="size-3" />
)}
</div>
{m.name}
{hasEditAccess && (
<span className="ml-2">
<XIcon className="size-2.5 text-muted-foreground group-hover:text-destructive" />
</span>
)}
</div>
));
}, [mentions, hasEditAccess, handleDeleteMention]);
return (
<ChatMentionInputSuggestion
onSelectMention={handleSelectMention}
onClose={noop}
open={open && hasEditAccess && !disabled}
disabledType={["agent"]}
onOpenChange={(newOpen) => hasEditAccess && !disabled && setOpen(newOpen)}
top={0}
left={0}
selectedIds={selectedIds}
style={{
width: triggerRect?.width ?? 0,
}}
>
<div
className={cn(
"w-full justify-start flex items-center gap-2 px-3 py-4 rounded-md bg-secondary",
hasEditAccess && !disabled && "hover:bg-input cursor-pointer",
)}
ref={triggerRef}
>
<div className="flex gap-2 items-center flex-wrap mr-auto">
{isLoading ? (
<span className="text-sm text-muted-foreground">
{t("Agent.loadingTools")}
</span>
) : selectedMentions.length === 0 ? (
<span className="text-sm text-muted-foreground">
{t("Agent.addTools")}
</span>
) : (
selectedMentions
)}
</div>
{isLoading ? (
<Loader className="size-4 animate-spin" />
) : (
<ChevronDownIcon
className={cn("size-4 transition-transform", open && "rotate-180")}
/>
)}
</div>
</ChatMentionInputSuggestion>
);
}
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