69 lines
1.7 KiB
Dart
69 lines
1.7 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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class Language {
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static final String defalutLocale = "zh_CN";
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static final Map<String, Map<String, String>> _translations = {};
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static void setLanguage(String locale,
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{String? path, Map<String, String>? language}) {
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//载入json文件
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if (path != null) {
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try {
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//暂时只支持本地文件
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var file = File(path);
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file.readAsString().then((data) {
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_translations[locale] = _flattenJson(jsonDecode(data));
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});
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} catch (e) {
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print(e);
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}
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return;
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}
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if (language != null) {
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//构建翻译kv
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_translations[locale] = _flattenJson(language);
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}
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}
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// 扁平化嵌套 JSON 数据
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static Map<String, String> _flattenJson(Map<String, dynamic> json,
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[String prefix = '']) {
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final Map<String, String> flatMap = {};
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json.forEach((key, value) {
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final newKey = prefix.isEmpty ? key : '$prefix.$key';
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if (value is Map<String, dynamic>) {
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flatMap.addAll(_flattenJson(value, newKey));
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} else {
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flatMap[newKey] = value.toString();
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}
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});
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return flatMap;
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}
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static void resetLanguage({String? locale}) {
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if (locale == null) {
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//清空全部语言文件
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_translations.clear();
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} else {
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//清空指定语言文件
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_translations.remove(locale);
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}
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}
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static String getTranslation(String key,
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{String? languageCode, Map<String, String>? params}) {
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var locale = languageCode ?? defalutLocale;
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String text = _translations[locale]?[key] ?? key;
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// 替换动态参数（如 @name）
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params?.forEach((key, value) {
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text = text.replaceAll('@$key', value);
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});
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return text;
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}
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}
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