77 lines
2.6 KiB
TypeScript
77 lines
2.6 KiB
TypeScript
export function formatBytes(bytes: number | null | undefined, digits = 2): string {
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const value = Number(bytes)
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if (!value || value < 0) return '—'
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const units = ['B', 'KB', 'MB', 'GB', 'TB', 'PB']
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let index = 0
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let n = value
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while (n >= 1024 && index < units.length - 1) {
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n /= 1024
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index++
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}
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return `${n.toFixed(index === 0 ? 0 : digits)} ${units[index]}`
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}
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export function formatDate(input: string | number | Date | null | undefined): string {
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if (!input) return '—'
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const date = input instanceof Date ? input : new Date(input)
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if (Number.isNaN(date.getTime())) return '—'
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const pad = (n: number) => String(n).padStart(2, '0')
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return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())} ${pad(date.getHours())}:${pad(
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date.getMinutes()
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)}`
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}
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export function formatRelative(input: string | number | Date | null | undefined): string {
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if (!input) return '—'
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const date = input instanceof Date ? input : new Date(input)
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const diff = Date.now() - date.getTime()
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if (Number.isNaN(diff)) return '—'
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const min = Math.floor(diff / 60000)
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if (min < 1) return '刚刚'
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if (min < 60) return `${min} 分钟前`
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const hour = Math.floor(min / 60)
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if (hour < 24) return `${hour} 小时前`
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const day = Math.floor(hour / 24)
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if (day < 30) return `${day} 天前`
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return formatDate(date)
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}
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export function formatNumber(value: number | null | undefined): string {
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if (value === null || value === undefined) return '—'
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return value.toLocaleString('en-US')
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}
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export function filePercent(length: number, total: number): string {
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if (!total) return '0%'
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const pct = (length / total) * 100
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return pct >= 10 ? `${pct.toFixed(0)}%` : `${pct.toFixed(1)}%`
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}
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/** 把扁平的文件路径拆成 目录 + 文件名，便于展示层级 */
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export function splitPath(path: string): { dir: string; name: string } {
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const idx = path.lastIndexOf('/')
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if (idx < 0) return { dir: '', name: path }
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return { dir: path.slice(0, idx + 1), name: path.slice(idx + 1) }
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}
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/** 可以尝试在线预览的图片扩展名 */
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export const IMAGE_EXTENSIONS = ['jpg', 'jpeg', 'png', 'gif', 'webp', 'bmp', 'avif']
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/** 与服务端 preview 接口保持一致：超过这个大小就不做在线预览 */
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export const MAX_IMAGE_PREVIEW_BYTES = 12 * 1024 * 1024
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export function isImagePath(path: string): boolean {
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const idx = path.lastIndexOf('.')
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if (idx < 0) return false
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return IMAGE_EXTENSIONS.includes(path.slice(idx + 1).toLowerCase())
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}
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export async function copyText(text: string): Promise<boolean> {
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try {
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await navigator.clipboard.writeText(text)
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return true
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} catch {
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return false
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}
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}
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