Groudwork for multilanguage

Geekbot.net/Lib/TranslationHandler.cs

@@ -0,0 +1,119 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Discord.WebSocket;
+using Serilog;
+using StackExchange.Redis;
+
+namespace Geekbot.net.Lib
+{
+    public class TranslationHandler : ITranslationHandler
+    {
+        private readonly ILogger _logger;
+        private readonly IDatabase _redis;
+        private Dictionary<string, Dictionary<string, Dictionary<string, string>>> _translations;
+        private Dictionary<ulong, string> _serverLanguages;
+        public List<string> _supportedLanguages;
+        
+        public TranslationHandler(IReadOnlyCollection<SocketGuild> clientGuilds, IDatabase redis, ILogger logger)
+        {
+            _logger = logger;
+            _redis = redis;
+            _logger.Information("[Geekbot] Loading Translations");
+            LoadTranslations();
+            CheckSupportedLanguages();
+            LoadServerLanguages(clientGuilds);
+        }
+
+        private void LoadTranslations()
+        {
+            try
+            {
+                var translations = File.ReadAllText(Path.GetFullPath("./Storage/Translations.json"));
+                _translations =
+                    Utf8Json.JsonSerializer.Deserialize<Dictionary<string, Dictionary<string, Dictionary<string, string>>>>(
+                        translations);
+            }
+            catch (Exception e)
+            {
+                _logger.Fatal(e, "Failed to load Translations");
+                Environment.Exit(110);
+            }
+        }
+        
+        private void CheckSupportedLanguages()
+        {
+            try
+            {
+                _supportedLanguages = new List<string>();
+                foreach (var lang in _translations.First().Value.First().Value)
+                {
+                    _supportedLanguages.Add(lang.Key);
+                }
+            }
+            catch (Exception e)
+            {
+                _logger.Fatal(e, "Failed to load Translations");
+                Environment.Exit(110);
+            }
+        }
+
+        private void LoadServerLanguages(IReadOnlyCollection<SocketGuild> clientGuilds)
+        {
+            _serverLanguages = new Dictionary<ulong, string>();
+            foreach (var guild in clientGuilds)
+            {
+                var language = _redis.HashGet($"{guild.Id}:Settings", "Language");
+                if (string.IsNullOrEmpty(language) || !_supportedLanguages.Contains(language))
+                {
+                    _serverLanguages[guild.Id] = "EN";
+                }
+                else
+                {
+                    _serverLanguages[guild.Id] = language.ToString();
+                }
+            }
+        }
+
+        public string GetString(ulong guildId, string command, string stringName)
+        {
+            var translation = _translations[command][stringName][_serverLanguages[guildId]];
+            if (!string.IsNullOrWhiteSpace(translation)) return translation;
+            translation = _translations[command][stringName]["EN"];
+            if (string.IsNullOrWhiteSpace(translation))
+            {
+                _logger.Warning($"No translation found for {command} - {stringName}");
+            }
+            return translation;
+        }
+
+        public bool SetLanguage(ulong guildId, string language)
+        {
+            try
+            {
+                if (!_supportedLanguages.Contains(language)) return false;
+                _redis.HashSet($"{guildId}:Settings", new HashEntry[]{ new HashEntry("Language", language), });
+                _serverLanguages[guildId] = language;
+                return true;
+            }
+            catch (Exception e)
+            {
+                _logger.Error(e, "[Geekbot] Error while changing language");
+                return false;
+            }
+        }
+
+        public List<string> GetSupportedLanguages()
+        {
+            return _supportedLanguages;
+        }
+    }
+
+    public interface ITranslationHandler
+    {
+        string GetString(ulong guildId, string command, string stringName);
+        bool SetLanguage(ulong guildId, string language);
+        List<string> GetSupportedLanguages();
+    }
+}