38 lines
1.0 KiB
TypeScript
38 lines
1.0 KiB
TypeScript
export type Lang = 'zh' | 'en' | 'ja' | 'fr';
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export const LANGS: Lang[] = ['zh', 'en', 'ja', 'fr'];
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export const DEFAULT_LANG: Lang = 'zh';
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export const htmlLang: Record<Lang, string> = {
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zh: 'zh-CN',
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en: 'en',
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ja: 'ja',
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fr: 'fr',
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};
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export const langLabels: Record<Lang, string> = {
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zh: '中文',
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en: 'English',
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ja: '日本語',
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fr: 'Français',
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};
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export function isLang(value: string | undefined): value is Lang {
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return value !== undefined && (LANGS as string[]).includes(value);
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}
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/** 站内路径（不含语言前缀），首页为空字符串 */
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export type RouteKey = '' | 'teaching-philosophy' | 'curriculum' | 'faculty' | 'about';
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export function hrefFor(lang: Lang, segment: RouteKey): string {
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const prefix = lang === DEFAULT_LANG ? '' : `/${lang}`;
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if (!segment) return prefix || '/';
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return `${prefix}/${segment}`;
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}
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/** 从 [...lang] rest 参数解析语言，undefined 时返回默认语言 */
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export function resolveLang(param: string | undefined): Lang {
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return isLang(param) ? param : DEFAULT_LANG;
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}
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