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'use client';
import { startTransition, useMemo, useOptimistic, useState } from 'react';
import { saveChatModelAsCookie } from '@/app/(chat)/actions';
import { Button } from '@/components/ui/button';
import {
DropdownMenu,
DropdownMenuContent,
DropdownMenuItem,
DropdownMenuTrigger,
} from '@/components/ui/dropdown-menu';
import { chatModels } from '@/lib/ai/models';
import { cn } from '@/lib/utils';
import { CheckCircleFillIcon, ChevronDownIcon } from './icons';
import { entitlementsByUserType } from '@/lib/ai/entitlements';
import type { Session } from 'next-auth';
export function ModelSelector({
session,
selectedModelId,
className,
}: {
session: Session;
selectedModelId: string;
} & React.ComponentProps<typeof Button>) {
const [open, setOpen] = useState(false);
const [optimisticModelId, setOptimisticModelId] =
useOptimistic(selectedModelId);
const userType = session.user.type;
const { availableChatModelIds } = entitlementsByUserType[userType];
const availableChatModels = chatModels.filter((chatModel) =>
availableChatModelIds.includes(chatModel.id),
);
const selectedChatModel = useMemo(
() =>
availableChatModels.find(
(chatModel) => chatModel.id === optimisticModelId,
),
[optimisticModelId, availableChatModels],
);
return (
<DropdownMenu open={open} onOpenChange={setOpen}>
<DropdownMenuTrigger
asChild
className={cn(
'w-fit data-[state=open]:bg-accent data-[state=open]:text-accent-foreground',
className,
)}
>
<Button
data-testid="model-selector"
variant="outline"
className="md:px-2 md:h-[34px]"
>
{selectedChatModel?.name}
<ChevronDownIcon />
</Button>
</DropdownMenuTrigger>
<DropdownMenuContent align="start" className="min-w-[300px]">
{availableChatModels.map((chatModel) => {
const { id } = chatModel;
return (
<DropdownMenuItem
data-testid={`model-selector-item-${id}`}
key={id}
onSelect={() => {
setOpen(false);
startTransition(() => {
setOptimisticModelId(id);
saveChatModelAsCookie(id);
});
}}
data-active={id === optimisticModelId}
asChild
>
<button
type="button"
className="gap-4 group/item flex flex-row justify-between items-center w-full"
>
<div className="flex flex-col gap-1 items-start">
<div>{chatModel.name}</div>
<div className="text-xs text-muted-foreground">
{chatModel.description}
</div>
</div>
<div className="text-foreground dark:text-foreground opacity-0 group-data-[active=true]/item:opacity-100">
<CheckCircleFillIcon />
</div>
</button>
</DropdownMenuItem>
);
})}
</DropdownMenuContent>
</DropdownMenu>
);
}
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