85 lines
2.8 KiB
TypeScript
85 lines
2.8 KiB
TypeScript
'use client'
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import i18nConfig from '@/i18nConfig'
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import { usePathname, useRouter } from 'next/navigation'
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import { useEffect, useTransition } from 'react'
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import { Globe } from 'lucide-react'
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export function LanguageSwitcher() {
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const router = useRouter()
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const pathname = usePathname()
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const [isPending, startTransition] = useTransition()
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const currentLocale = pathname.split('/')[1] || i18nConfig.defaultLocale
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useEffect(() => {
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// 只在加载时检查，避免多次保存 cookie
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if (typeof window !== 'undefined') {
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const saved = localStorage.getItem('preferred-language')
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console.log('Read cookie from localstorage preferred-language=', saved)
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const isLocaleInPath = i18nConfig.locales.includes(currentLocale as any)
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console.log('i18nConfig.locales currentLocale=', currentLocale)
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// 只有在 URL 中没有 locale 前缀时才进行处理
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if (!isLocaleInPath && saved !== currentLocale) {
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// 不做 cookie 写入，除非用户选择语言
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console.log('[LanguageSwitcher] No need to update cookie, currentLocale:', currentLocale)
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}
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}
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else{
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console.log('language switcher no running in client browser.')
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}
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}, [currentLocale])
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const handleChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
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const newLocale = e.target.value
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// 仅在用户选择语言后保存 cookie
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console.log('[LanguageSwitcher] Write Cookie newLocale value:', newLocale)
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document.cookie = `preferred-language=${newLocale}; path=/; max-age=31536000`
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// 验证 cookie 是否成功写入
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const cookieValue = document.cookie
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console.log('[LanguageSwitcher] Check writed Cookie value:', cookieValue)
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let segments = pathname === '/' ? [] : pathname.split('/').filter(Boolean)
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const isLocaleInPath = i18nConfig.locales.includes(segments[0] as any)
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if (isLocaleInPath) {
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segments[0] = newLocale
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} else {
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segments.unshift(newLocale)
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}
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const newPath = '/' + segments.join('/')
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// 延迟跳转，确保 cookie 写入完成
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setTimeout(() => {
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startTransition(() => {
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if (pathname !== newPath) {
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router.push(newPath)
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} else {
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router.refresh()
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}
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})
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}, 0)
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}
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return (
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<div className="absolute top-4 right-4 z-50 flex items-center gap-2">
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<Globe size={18} className="text-muted-foreground" />
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<select
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className="rounded-md border px-2 py-1 text-sm bg-background text-foreground"
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value={currentLocale}
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onChange={handleChange}
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disabled={isPending}
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>
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{i18nConfig.locales.map(locale => (
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<option key={locale} value={locale}>
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{i18nConfig.languageNames[locale] || locale.toUpperCase()}
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</option>
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))}
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</select>
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</div>
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)
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}
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