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93 lines
3.2 KiB
JavaScript
93 lines
3.2 KiB
JavaScript
// time.js
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export default class TimeManager {
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// 统一入口：最近 N 天用相对时间，其余走原来的绝对时间
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static format(input, opts = {}) {
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const {
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relativeUntilMs = 48 * 60 * 60 * 1000, // 小于 48h 显示相对时间
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now = new Date(),
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locale = 'zh-CN',
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} = opts
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const date = new Date(input)
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if (Number.isNaN(date.getTime())) return ''
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const diffMs = now - date
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if (diffMs < 0) {
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// 未来时间：也用相对格式（“X 分钟后”）
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return this.#formatRelative(date, { now, locale })
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}
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if (diffMs <= relativeUntilMs) {
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return this.#formatRelative(date, { now, locale })
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}
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return this.#formatAbsolute(date, now)
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}
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// 仅相对时间（供需要时直接调用）
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static formatRelative(input, { now = new Date(), locale = 'zh-CN' } = {}) {
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const date = new Date(input)
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if (Number.isNaN(date.getTime())) return ''
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return this.#formatRelative(date, { now, locale })
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}
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// 仅绝对时间（保留你的原逻辑）
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static formatAbsolute(input, now = new Date()) {
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const date = new Date(input)
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if (Number.isNaN(date.getTime())) return ''
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return this.#formatAbsolute(date, now)
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}
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// —— 私有实现 —— //
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static #formatRelative(date, { now, locale }) {
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const rtf = new Intl.RelativeTimeFormat(locale, { numeric: 'always' })
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const diffSec = Math.round((date - now) / 1000) // 过去是负数，未来是正数
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const absSec = Math.abs(diffSec)
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// 你想要的“几秒钟前”
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if (absSec < 10) return diffSec <= 0 ? '几秒钟前' : '几秒钟后'
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if (absSec < 60) return rtf.format(Math.trunc(diffSec), 'second')
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const diffMin = Math.trunc(diffSec / 60)
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const absMin = Math.abs(diffMin)
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if (absMin < 60) return rtf.format(diffMin, 'minute')
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const diffHour = Math.trunc(diffSec / 3600)
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const absHour = Math.abs(diffHour)
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if (absHour < 24) return rtf.format(diffHour, 'hour')
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const diffDay = Math.trunc(diffSec / 86400)
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if (Math.abs(diffDay) < 30) return rtf.format(diffDay, 'day')
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const diffMonth = Math.trunc(diffDay / 30)
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if (Math.abs(diffMonth) < 12) return rtf.format(diffMonth, 'month')
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const diffYear = Math.trunc(diffDay / 365)
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return rtf.format(diffYear, 'year')
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}
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static #formatAbsolute(date, now) {
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const startOfToday = new Date(now.getFullYear(), now.getMonth(), now.getDate())
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const startOfDate = new Date(date.getFullYear(), date.getMonth(), date.getDate())
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const diffDays = Math.floor((startOfToday - startOfDate) / 86400000)
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const hh = date.getHours().toString().padStart(2, '0')
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const mm = date.getMinutes().toString().padStart(2, '0')
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const timePart = `${hh}:${mm}`
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if (diffDays === 0) return `今天 ${timePart}`
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if (diffDays === 1) return `昨天 ${timePart}`
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if (diffDays === 2) return `前天 ${timePart}`
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const month = date.getMonth() + 1
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const day = date.getDate()
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if (date.getFullYear() === now.getFullYear()) {
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return `${month}.${day} ${timePart}`
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}
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if (date.getFullYear() === now.getFullYear() - 1) {
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return `去年 ${month}.${day} ${timePart}`
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}
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return `${date.getFullYear()}.${month}.${day} ${timePart}`
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}
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}
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