32 lines
1.3 KiB
TypeScript
32 lines
1.3 KiB
TypeScript
import { i18n } from "./i18n";
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// Add the active locale prefix to root-relative MDX links so internal
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// navigation inside Chinese (or any non-default-language) docs stays in
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// that language. Without this, `[xx](/workspaces)` written in a `*.zh.mdx`
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// renders as `<a href="/workspaces">`, which Next's basePath rewrites to
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// `/docs/workspaces` and the docs middleware then routes to English —
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// leaking the reader out of their chosen locale.
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//
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// We deliberately do NOT touch:
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// - external links (`https:`, `mailto:`, `tel:`, etc.)
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// - in-page anchors (`#section`)
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// - relative paths (`./foo`, `../bar`)
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// - paths already prefixed with a known locale
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// - the default language (URLs are intentionally prefix-less under
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// `hideLocale: 'default-locale'`)
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export function prefixLocale(href: string, lang: string): string {
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if (!href) return href;
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if (lang === i18n.defaultLanguage) return href;
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if (/^[a-z][a-z0-9+.-]*:/i.test(href)) return href;
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if (href.startsWith("#")) return href;
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if (!href.startsWith("/")) return href;
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const segments = href.split("/").filter(Boolean);
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const first = segments[0];
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if (first && (i18n.languages as readonly string[]).includes(first)) {
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return href;
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}
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return href === "/" ? `/${lang}` : `/${lang}${href}`;
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}
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