Simon
51 lines
1.3 KiB
TypeScript
51 lines
1.3 KiB
TypeScript
import {
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type SupportedLanguage,
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type TranslationKey,
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type TranslationParams,
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type TranslationSchema,
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locales,
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} from './locales'
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export class I18n {
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private language: SupportedLanguage
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private translations: TranslationSchema
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constructor(language: SupportedLanguage = 'en-US') {
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this.language = language in locales ? language : 'en-US'
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this.translations = locales[language]
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}
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// 类型安全的翻译方法
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t(key: TranslationKey, params?: TranslationParams): string {
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const value = this.getNestedValue(this.translations, key)
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if (!value) {
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console.warn(`Translation key "${key}" not found for language "${this.language}"`)
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return key
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}
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if (params) {
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return this.interpolate(value, params)
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}
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return value
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}
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private getNestedValue(obj: any, path: string): string | undefined {
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return path.split('.').reduce((current, key) => current?.[key], obj)
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}
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private interpolate(template: string, params: TranslationParams): string {
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return template.replace(/\{\{(\w+)\}\}/g, (match, key) => {
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// Use != null to check for both null and undefined, allow empty strings
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return params[key] != null ? params[key].toString() : match
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})
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}
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getLanguage(): SupportedLanguage {
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return this.language
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}
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}
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// 导出类型和实例创建函数
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export type { TranslationKey, SupportedLanguage, TranslationParams }
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export { locales }
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