0.1.6

mica

LanMontainDesktop/Services/LocalizationService.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text.Json;
+
+namespace LanMontainDesktop.Services;
+
+public sealed class LocalizationService
+{
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        ReadCommentHandling = JsonCommentHandling.Skip,
+        AllowTrailingCommas = true
+    };
+
+    private readonly Dictionary<string, Dictionary<string, string>> _cache =
+        new(StringComparer.OrdinalIgnoreCase);
+
+    public string NormalizeLanguageCode(string? languageCode)
+    {
+        return string.Equals(languageCode, "en-US", StringComparison.OrdinalIgnoreCase)
+            ? "en-US"
+            : "zh-CN";
+    }
+
+    public string GetString(string languageCode, string key, string fallback)
+    {
+        var normalizedLanguage = NormalizeLanguageCode(languageCode);
+        var table = LoadLanguageTable(normalizedLanguage);
+        return table.TryGetValue(key, out var value) && !string.IsNullOrWhiteSpace(value)
+            ? value
+            : fallback;
+    }
+
+    private Dictionary<string, string> LoadLanguageTable(string languageCode)
+    {
+        if (_cache.TryGetValue(languageCode, out var table))
+        {
+            return table;
+        }
+
+        var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        try
+        {
+            var filePath = Path.Combine(AppContext.BaseDirectory, "Localization", $"{languageCode}.json");
+            if (File.Exists(filePath))
+            {
+                var json = File.ReadAllText(filePath);
+                var data = JsonSerializer.Deserialize<Dictionary<string, string>>(json, JsonOptions);
+                if (data is not null)
+                {
+                    result = new Dictionary<string, string>(data, StringComparer.OrdinalIgnoreCase);
+                }
+            }
+        }
+        catch
+        {
+            // Keep empty table for resilience.
+        }
+
+        _cache[languageCode] = result;
+        return result;
+    }
+}
+