feat(bot): add Redis cache

PluralKit.Bot/BotConfig.cs

@@ -20,6 +20,7 @@ public class BotConfig
 
     public string? GatewayQueueUrl { get; set; }
     public bool UseRedisRatelimiter { get; set; } = false;
+    public bool UseRedisCache { get; set; } = false;
 
     public string? RedisGatewayUrl { get; set; }
 

PluralKit.Bot/Init.cs

@@ -2,6 +2,7 @@ using Autofac;
 
 using Microsoft.Extensions.Configuration;
 
+using Myriad.Cache;
 using Myriad.Gateway;
 using Myriad.Types;
 using Myriad.Rest;
@@ -51,6 +52,10 @@ public class Init
             if (config.UseRedisRatelimiter)
                 await redis.InitAsync(coreConfig);
 
+            var cache = services.Resolve<IDiscordCache>();
+            if (cache is RedisDiscordCache)
+                await (cache as RedisDiscordCache).InitAsync(coreConfig.RedisAddr, config.ClientId!.Value);
+
             if (config.Cluster == null)
             {
                 // "Connect to the database" (ie. set off database migrations and ensure state)

PluralKit.Bot/Modules.cs

@@ -44,7 +44,13 @@ public class BotModule: Module
         }).AsSelf().SingleInstance();
         builder.RegisterType<Cluster>().AsSelf().SingleInstance();
         builder.RegisterType<RedisGatewayService>().AsSelf().SingleInstance();
-        builder.Register(c => { return new MemoryDiscordCache(); }).AsSelf().As<IDiscordCache>().SingleInstance();
+        builder.Register<IDiscordCache>(c => {
+            var botConfig = c.Resolve<BotConfig>();
+
+            if (botConfig.UseRedisCache)
+                return new RedisDiscordCache(c.Resolve<ILogger>());
+            return new MemoryDiscordCache();
+        }).AsSelf().SingleInstance();
         builder.RegisterType<PrivateChannelService>().AsSelf().SingleInstance();
 
         builder.Register(c =>

PluralKit.Bot/packages.lock.json

@@ -1520,6 +1520,8 @@
       "myriad": {
         "type": "Project",
         "dependencies": {
+          "Google.Protobuf": "3.13.0",
+          "Grpc.Net.ClientFactory": "2.32.0",
           "Polly": "7.2.1",
           "Polly.Contrib.WaitAndRetry": "1.1.1",
           "Serilog": "2.10.0",