next/dist/esm/shared/lib/router/utils/add-locale.js

The React Framework

import { addPathPrefix } from './add-path-prefix';
import { pathHasPrefix } from './path-has-prefix';
/**
 * For a given path and a locale, if the locale is given, it will prefix the
 * locale. The path shouldn't be an API path. If a default locale is given the
 * prefix will be omitted if the locale is already the default locale.
 */ export function addLocale(path, locale, defaultLocale, ignorePrefix) {
    // If no locale was given or the locale is the default locale, we don't need
    // to prefix the path.
    if (!locale || locale === defaultLocale) return path;
    const lower = path.toLowerCase();
    // If the path is an API path or the path already has the locale prefix, we
    // don't need to prefix the path.
    if (!ignorePrefix) {
        if (pathHasPrefix(lower, '/api')) return path;
        if (pathHasPrefix(lower, "/" + locale.toLowerCase())) return path;
    }
    // Add the locale prefix to the path.
    return addPathPrefix(path, "/" + locale);
}

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