37 lines
1.0 KiB
TypeScript
37 lines
1.0 KiB
TypeScript
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const pad = (n: number) => String(n).padStart(2, '0');
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function sameDay(a: Date, b: Date) {
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return (
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a.getFullYear() === b.getFullYear() &&
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a.getMonth() === b.getMonth() &&
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a.getDate() === b.getDate()
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);
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}
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export function formatChatTime(timestampSec: number): string {
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const date = new Date(timestampSec * 1000);
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const now = new Date();
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const time = `${pad(date.getHours())}:${pad(date.getMinutes())}`;
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if (sameDay(date, now)) {
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return time;
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}
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const yesterday = new Date(now);
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yesterday.setDate(yesterday.getDate() - 1);
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if (sameDay(date, yesterday)) {
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return `昨天 ${time}`;
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}
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if (date.getFullYear() === now.getFullYear()) {
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return `${date.getMonth() + 1}月${date.getDate()}日 ${time}`;
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}
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return `${date.getFullYear()}年${date.getMonth() + 1}月${date.getDate()}日 ${time}`;
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}
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export function shouldShowTimestamp(currentSec: number, previousSec?: number): boolean {
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if (previousSec === undefined) return true;
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return currentSec - previousSec > 5 * 60;
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}
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