revite/src/components/ui/DateDivider.tsx

import dayjs from "dayjs";
import styled, { css } from "styled-components";

const Base = styled.div<{ unread?: boolean }>`
	height: 0;
	display: flex;
	user-select: none;
	align-items: center;
	margin: 17px 12px 5px;
	border-top: thin solid var(--tertiary-foreground);

	time {
		margin-top: -2px;
		font-size: 0.6875rem;
		line-height: 0.6875rem;
		padding: 2px 5px 2px 0;
		color: var(--tertiary-foreground);
		background: var(--primary-background);
	}

	${(props) =>
		props.unread &&
		css`
			border-top: thin solid var(--accent);
		`}
`;

const Unread = styled.div`
	background: var(--accent);
	color: white;
	padding: 5px 8px;
	border-radius: 60px;
	font-weight: 600;
`;

interface Props {
	date: Date;
	unread?: boolean;
}

export default function DateDivider(props: Props) {
	return (
		<Base unread={props.unread}>
			{props.unread && <Unread>NEW</Unread>}
			<time>{dayjs(props.date).format("LL")}</time>
		</Base>
	);
}