64 lines
1.7 KiB
Dart
64 lines
1.7 KiB
Dart
import 'dart:convert';
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import 'package:ef/ef.dart';
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import 'package:flutter/services.dart';
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class AppLanguage extends Translations {
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// 私有构造函数
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AppLanguage._internal();
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// 单例实例
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static final AppLanguage _instance = AppLanguage._internal();
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factory AppLanguage() => _instance;
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// 缓存翻译数据
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final Map<String, Map<String, String>> _localizedValues = {};
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@override
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Map<String, Map<String, String>> get keys => _localizedValues;
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// 动态加载语言文件
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Future<void> loadLanguage(String languageCode) async {
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if (_localizedValues.containsKey(languageCode)) {
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return; // 如果语言已经加载，无需重复加载
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}
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try {
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// 加载 JSON 文件
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final jsonString =
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await rootBundle.loadString('assets/langs/$languageCode.json');
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final Map<String, dynamic> jsonMap = json.decode(jsonString);
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// 扁平化 JSON 数据并存储到缓存
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_localizedValues[languageCode] = _flattenJson(jsonMap);
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// 通知 GetX 更新 keys
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// Get.forceAppUpdate();
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Get.appendTranslations(keys);
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} catch (e) {
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print('Error loading $languageCode language file: $e');
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}
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}
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// 扁平化嵌套 JSON 数据
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Map<String, String> _flattenJson(Map<String, dynamic> json,
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[String prefix = '']) {
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final Map<String, String> flatMap = {};
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json.forEach((key, value) {
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final newKey = prefix.isEmpty ? key : '$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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// 清理语言缓存
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void clearLanguage(String languageCode) {
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_localizedValues.remove(languageCode);
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}
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}
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