More minor restructuring and cleanup. Most modules and submodules should be properly grouped now

src/NadekoBot/Modules/Utility/UnitConversion/ConverterService.cs

@@ -0,0 +1,81 @@
+#nullable disable
+using NadekoBot.Modules.Utility.Common;
+using Newtonsoft.Json;
+
+namespace NadekoBot.Modules.Utility.Services;
+
+public class ConverterService : INService
+{
+    public ConvertUnit[] Units
+        => _cache.Redis.GetDatabase().StringGet("converter_units").ToString().MapJson<ConvertUnit[]>();
+
+    private readonly Timer _currencyUpdater;
+    private readonly TimeSpan _updateInterval = new(12, 0, 0);
+    private readonly DbService _db;
+    private readonly IDataCache _cache;
+    private readonly IHttpClientFactory _httpFactory;
+
+    public ConverterService(
+        DiscordSocketClient client,
+        DbService db,
+        IDataCache cache,
+        IHttpClientFactory factory)
+    {
+        _db = db;
+        _cache = cache;
+        _httpFactory = factory;
+
+        if (client.ShardId == 0)
+            _currencyUpdater = new(async shouldLoad => await UpdateCurrency((bool)shouldLoad),
+                client.ShardId == 0,
+                TimeSpan.Zero,
+                _updateInterval);
+    }
+
+    private async Task<Rates> GetCurrencyRates()
+    {
+        using var http = _httpFactory.CreateClient();
+        var res = await http.GetStringAsync("https://convertapi.nadeko.bot/latest");
+        return JsonConvert.DeserializeObject<Rates>(res);
+    }
+
+    private async Task UpdateCurrency(bool shouldLoad)
+    {
+        try
+        {
+            var unitTypeString = "currency";
+            if (shouldLoad)
+            {
+                var currencyRates = await GetCurrencyRates();
+                var baseType = new ConvertUnit
+                {
+                    Triggers = new[] { currencyRates.Base }, Modifier = decimal.One, UnitType = unitTypeString
+                };
+                var range = currencyRates.ConversionRates.Select(u => new ConvertUnit
+                                         {
+                                             Triggers = new[] { u.Key }, Modifier = u.Value, UnitType = unitTypeString
+                                         })
+                                         .ToArray();
+
+                var fileData = JsonConvert.DeserializeObject<ConvertUnit[]>(File.ReadAllText("data/units.json"))
+                                          .Where(x => x.UnitType != "currency");
+
+                var data = JsonConvert.SerializeObject(range.Append(baseType).Concat(fileData).ToList());
+                _cache.Redis.GetDatabase().StringSet("converter_units", data);
+            }
+        }
+        catch
+        {
+            // ignored
+        }
+    }
+}
+
+public class Rates
+{
+    public string Base { get; set; }
+    public DateTime Date { get; set; }
+
+    [JsonProperty("rates")]
+    public Dictionary<string, decimal> ConversionRates { get; set; }
+}