91 lines
2.9 KiB
TypeScript
91 lines
2.9 KiB
TypeScript
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export type ValidityUnit = 'day' | 'week' | 'month';
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/**
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* 根据数值和单位计算实际有效天数。
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* - day: 直接返回
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* - week: value * 7
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* - month: 从 fromDate 到 value 个月后同一天的天数差
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*/
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export function computeValidityDays(value: number, unit: ValidityUnit, fromDate?: Date): number {
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if (unit === 'day') return value;
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if (unit === 'week') return value * 7;
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// month: 计算到 value 个月后同一天的天数差
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const from = fromDate ?? new Date();
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const target = new Date(from);
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target.setMonth(target.getMonth() + value);
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return Math.round((target.getTime() - from.getTime()) / (1000 * 60 * 60 * 24));
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}
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/**
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* 智能格式化有效期显示文本。
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* - unit=month, value=1 → 包月 / Monthly
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* - unit=month, value=3 → 包3月 / 3 Months
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* - unit=week, value=2 → 包2周 / 2 Weeks
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* - unit=day, value=30 → 包月 / Monthly (特殊处理)
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* - unit=day, value=90 → 包90天 / 90 Days
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*/
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export function formatValidityLabel(
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value: number,
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unit: ValidityUnit,
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locale: 'zh' | 'en',
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): string {
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if (unit === 'month') {
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if (value === 1) return locale === 'zh' ? '包月' : 'Monthly';
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return locale === 'zh' ? `包${value}月` : `${value} Months`;
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}
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if (unit === 'week') {
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if (value === 1) return locale === 'zh' ? '包周' : 'Weekly';
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return locale === 'zh' ? `包${value}周` : `${value} Weeks`;
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}
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// day
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if (value === 30) return locale === 'zh' ? '包月' : 'Monthly';
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return locale === 'zh' ? `包${value}天` : `${value} Days`;
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}
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/**
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* 智能格式化有效期后缀（用于价格展示）。
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* - unit=month, value=1 → /月 / /mo
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* - unit=month, value=3 → /3月 / /3mo
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* - unit=week, value=2 → /2周 / /2wk
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* - unit=day, value=30 → /月 / /mo
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* - unit=day, value=90 → /90天 / /90d
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*/
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export function formatValiditySuffix(
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value: number,
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unit: ValidityUnit,
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locale: 'zh' | 'en',
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): string {
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if (unit === 'month') {
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if (value === 1) return locale === 'zh' ? '/月' : '/mo';
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return locale === 'zh' ? `/${value}月` : `/${value}mo`;
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}
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if (unit === 'week') {
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if (value === 1) return locale === 'zh' ? '/周' : '/wk';
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return locale === 'zh' ? `/${value}周` : `/${value}wk`;
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}
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// day
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if (value === 30) return locale === 'zh' ? '/月' : '/mo';
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return locale === 'zh' ? `/${value}天` : `/${value}d`;
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}
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/**
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* 格式化有效期列表展示文本（管理后台表格用）。
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* - unit=day → "30 天"
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* - unit=week → "2 周"
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* - unit=month → "1 月"
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*/
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export function formatValidityDisplay(
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value: number,
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unit: ValidityUnit,
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locale: 'zh' | 'en',
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): string {
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const unitLabels: Record<ValidityUnit, { zh: string; en: string }> = {
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day: { zh: '天', en: 'day(s)' },
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week: { zh: '周', en: 'week(s)' },
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month: { zh: '月', en: 'month(s)' },
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};
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const label = locale === 'zh' ? unitLabels[unit].zh : unitLabels[unit].en;
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return `${value} ${label}`;
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}
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