Abstract away cache. 2 implementations: redis and memory

src/NadekoBot/Modules/Utility/Patronage/PatronageService.cs

@@ -31,9 +31,10 @@ public sealed class PatronageService
     private readonly DiscordSocketClient _client;
     private readonly ISubscriptionHandler _subsHandler;
     private readonly IEmbedBuilderService _eb;
-    private readonly ConnectionMultiplexer _redis;
-    private readonly IBotCredentials _creds;
-    private readonly TypedKey<bool> _quotaKey;
+    private static readonly TypedKey<long> _quotaKey 
+        = new($"quota:last_hourly_reset");
+
+    private readonly IBotCache _cache;
 
     public PatronageService(
         PatronageConfig pConf,
@@ -41,18 +42,14 @@ public sealed class PatronageService
         DiscordSocketClient client,
         ISubscriptionHandler subsHandler,
         IEmbedBuilderService eb,
-        ConnectionMultiplexer redis,
-        IBotCredentials creds)
+        IBotCache cache)
     {
         _pConf = pConf;
         _db = db;
         _client = client;
         _subsHandler = subsHandler;
         _eb = eb;
-        _redis = redis;
-        _creds = creds;
-
-        _quotaKey = new TypedKey<bool>($"{_creds.RedisKey()}:quota:last_hourly_reset");
+        _cache = cache;
     }
 
     public Task OnReadyAsync()
@@ -101,11 +98,10 @@ public sealed class PatronageService
                 var now = DateTime.UtcNow;
                 var lastRun = DateTime.MinValue;
 
-                var rdb = _redis.GetDatabase();
-                var lastVal = await rdb.StringGetAsync(_quotaKey.Key);
-                if (lastVal != default)
+                var result = await _cache.GetAsync(_quotaKey);
+                if (result.TryGetValue(out var lastVal) && lastVal != default)
                 {
-                    lastRun = DateTime.FromBinary((long)lastVal);
+                    lastRun = DateTime.FromBinary(lastVal);
                 }
 
                 var nowDate = now.ToDateOnly();
@@ -130,8 +126,6 @@ public sealed class PatronageService
                                  HourlyCount = 0,
                                  DailyCount = 0,
                              });
-
-                    await rdb.StringSetAsync(_quotaKey.Key, true);
                 }
                 else if (now.Hour != lastRun.Hour) // if it's not, just reset hourly quotas
                 {
@@ -143,7 +137,7 @@ public sealed class PatronageService
                 }
 
                 // assumes that the code above runs in less than an hour
-                await rdb.StringSetAsync(_quotaKey.Key, now.ToBinary());
+                await _cache.AddAsync(_quotaKey, now.ToBinary());
                 await tran.CommitAsync();
             }
             catch (Exception ex)

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

@@ -1,23 +1,24 @@
 #nullable disable
 using NadekoBot.Common.ModuleBehaviors;
 using NadekoBot.Modules.Utility.Common;
-using Newtonsoft.Json;
+using System.Text.Json;
+using System.Text.Json.Serialization;
 
 namespace NadekoBot.Modules.Utility.Services;
 
 public class ConverterService : INService, IReadyExecutor
 {
-    public ConvertUnit[] Units
-        => _cache.Redis.GetDatabase().StringGet("converter_units").ToString().MapJson<ConvertUnit[]>();
+    private static readonly TypedKey<List<ConvertUnit>> _convertKey =
+        new("convert:units");
 
     private readonly TimeSpan _updateInterval = new(12, 0, 0);
     private readonly DiscordSocketClient _client;
-    private readonly IDataCache _cache;
+    private readonly IBotCache _cache;
     private readonly IHttpClientFactory _httpFactory;
 
     public ConverterService(
         DiscordSocketClient client,
-        IDataCache cache,
+        IBotCache cache,
         IHttpClientFactory factory)
     {
         _client = client;
@@ -48,7 +49,7 @@ public class ConverterService : INService, IReadyExecutor
     {
         using var http = _httpFactory.CreateClient();
         var res = await http.GetStringAsync("https://convertapi.nadeko.bot/latest");
-        return JsonConvert.DeserializeObject<Rates>(res);
+        return JsonSerializer.Deserialize<Rates>(res);
     }
 
     private async Task UpdateCurrency()
@@ -61,29 +62,38 @@ public class ConverterService : INService, IReadyExecutor
             Modifier = decimal.One,
             UnitType = unitTypeString
         };
-        var range = currencyRates.ConversionRates.Select(u => new ConvertUnit
+        var units = currencyRates.ConversionRates.Select(u => new ConvertUnit
                                  {
                                      Triggers = new[] { u.Key },
                                      Modifier = u.Value,
                                      UnitType = unitTypeString
                                  })
-                                 .ToArray();
+                                 .ToList();
 
-        var fileData = JsonConvert.DeserializeObject<ConvertUnit[]>(File.ReadAllText("data/units.json"))
-                                  ?.Where(x => x.UnitType != "currency");
-        if (fileData is null)
-            return;
-
-        var data = JsonConvert.SerializeObject(range.Append(baseType).Concat(fileData).ToList());
-        _cache.Redis.GetDatabase().StringSet("converter_units", data);
+        var stream =  File.OpenRead("data/units.json");
+        var defaultUnits = await JsonSerializer.DeserializeAsync<ConvertUnit[]>(stream);
+        if(defaultUnits is not null)
+            units.AddRange(defaultUnits);
+        
+        units.Add(baseType);
+        
+        await _cache.AddAsync(_convertKey, units);
     }
+
+    public async Task<IReadOnlyList<ConvertUnit>> GetUnitsAsync()
+        => (await _cache.GetAsync(_convertKey)).TryGetValue(out var list)
+            ? list
+            : Array.Empty<ConvertUnit>();
 }
 
 public class Rates
 {
+    [JsonPropertyName("base")]
     public string Base { get; set; }
+    
+    [JsonPropertyName("date")]
     public DateTime Date { get; set; }
 
-    [JsonProperty("rates")]
+    [JsonPropertyName("rates")]
     public Dictionary<string, decimal> ConversionRates { get; set; }
 }

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

@@ -11,7 +11,7 @@ public partial class Utility
         [Cmd]
         public async partial Task ConvertList()
         {
-            var units = _service.Units;
+            var units = await _service.GetUnitsAsync();
 
             var embed = _eb.Create().WithTitle(GetText(strs.convertlist)).WithOkColor();
 
@@ -29,9 +29,10 @@ public partial class Utility
         [Priority(0)]
         public async partial Task Convert(string origin, string target, decimal value)
         {
-            var originUnit = _service.Units.FirstOrDefault(x
+            var units = await _service.GetUnitsAsync();
+            var originUnit = units.FirstOrDefault(x
                 => x.Triggers.Select(y => y.ToUpperInvariant()).Contains(origin.ToUpperInvariant()));
-            var targetUnit = _service.Units.FirstOrDefault(x
+            var targetUnit = units.FirstOrDefault(x
                 => x.Triggers.Select(y => y.ToUpperInvariant()).Contains(target.ToUpperInvariant()));
             if (originUnit is null || targetUnit is null)
             {