Abstract away cache. 2 implementations: redis and memory

CHANGELOG.md

@@ -3,6 +3,26 @@
 
 Experimental changelog. Mostly based on [keepachangelog](https://keepachangelog.com/en/1.0.0/) except date format. a-c-f-r-o
 
+## Unreleased
+
+### Changed
+
+- New cache abstraction added
+  - 2 implemenations: redis and memory 
+  - All current bots will stay on redis cache, all new bots will use in-process memory cache
+  - This change removes bot's hard dependency on redis
+  - Configurable in `creds.yml` (please read the comments)
+  - You **MUST** use 'redis' if your bot runs on more than 1 shard (2000+ servers)
+- [dev] Using new non-locking ConcurrentDictionary
+
+### Fixed
+
+- `.xp` will now show default user avatars too
+
+### Removed
+
+- Removed `.imagesreload` as images are now lazily loaded on request and then cached
+
 ## [4.2.6] - 22.06.2022
 
 ### Fixed

src/NadekoBot.Tests/BotStringsTests.cs

@@ -21,7 +21,7 @@ namespace NadekoBot.Tests
             var stringsSource = new LocalFileStringsSource(
                 responsesPath,
                 commandsPath);
-            var strings = new LocalBotStringsProvider(stringsSource);
+            var strings = new MemoryBotStringsProvider(stringsSource);
 
             var culture = new CultureInfo("en-US");
 

src/NadekoBot/Bot.cs

@@ -102,20 +102,20 @@ public sealed class Bot
         var svcs = new ServiceCollection().AddTransient(_ => _credsProvider.GetCreds()) // bot creds
                                           .AddSingleton(_credsProvider)
                                           .AddSingleton(_db) // database
-                                          .AddRedis(_creds.RedisOptions) // redis
                                           .AddSingleton(Client) // discord socket client
                                           .AddSingleton(_commandService)
                                           // .AddSingleton(_interactionService)
                                           .AddSingleton(this)
                                           .AddSingleton<ISeria, JsonSeria>()
-                                          .AddSingleton<IPubSub, RedisPubSub>()
                                           .AddSingleton<IConfigSeria, YamlSeria>()
-                                          .AddBotStringsServices(_creds.TotalShards)
                                           .AddConfigServices()
                                           .AddConfigMigrators()
                                           .AddMemoryCache()
                                           // music
-                                          .AddMusic();
+                                          .AddMusic()
+                                          // cache
+                                          .AddCache(_creds);
+        
         // admin
 #if GLOBAL_NADEKO
         svcs.AddSingleton<ILogCommandService, DummyLogCommandService>();
@@ -143,13 +143,6 @@ public sealed class Bot
                 .AddSingleton<IReadyExecutor>(x => x.GetRequiredService<RemoteGrpcCoordinator>());
         }
 
-        svcs.AddSingleton<RedisLocalDataCache>()
-            .AddSingleton<ILocalDataCache>(x => x.GetRequiredService<RedisLocalDataCache>())
-            .AddSingleton<RedisImagesCache>()
-            .AddSingleton<IImageCache>(x => x.GetRequiredService<RedisImagesCache>())
-            .AddSingleton<IReadyExecutor>(x => x.GetRequiredService<RedisImagesCache>())
-            .AddSingleton<IDataCache, RedisCache>();
-
         svcs.Scan(scan => scan.FromAssemblyOf<IReadyExecutor>()
                               .AddClasses(classes => classes.AssignableToAny(
                                       // services

src/NadekoBot/Common/Attributes/Ratelimit.cs

@@ -15,22 +15,24 @@ public sealed class RatelimitAttribute : PreconditionAttribute
         Seconds = seconds;
     }
 
-    public override Task<PreconditionResult> CheckPermissionsAsync(
+    public override async Task<PreconditionResult> CheckPermissionsAsync(
         ICommandContext context,
         CommandInfo command,
         IServiceProvider services)
     {
         if (Seconds == 0)
-            return Task.FromResult(PreconditionResult.FromSuccess());
+            return PreconditionResult.FromSuccess();
 
-        var cache = services.GetRequiredService<IDataCache>();
+        var cache = services.GetRequiredService<IBotCache>();
-        var rem = cache.TryAddRatelimit(context.User.Id, command.Name, Seconds);
+        var rem = await cache.GetRatelimitAsync(
+            new($"precondition:{context.User.Id}:{command.Name}"),
+            Seconds.Seconds());
 
         if (rem is null)
-            return Task.FromResult(PreconditionResult.FromSuccess());
+            return PreconditionResult.FromSuccess();
 
         var msgContent = $"You can use this command again in {rem.Value.TotalSeconds:F1}s.";
 
-        return Task.FromResult(PreconditionResult.FromError(msgContent));
+        return PreconditionResult.FromError(msgContent);
     }
 }

src/NadekoBot/Common/Cache/BotCacheExtensions.cs

@@ -0,0 +1,46 @@
+using OneOf;
+using OneOf.Types;
+
+namespace NadekoBot.Common;
+
+public static class BotCacheExtensions
+{
+    public static async ValueTask<T?> GetOrDefaultAsync<T>(this IBotCache cache, TypedKey<T> key)
+    {
+        var result = await cache.GetAsync(key);
+        if (result.TryGetValue(out var val))
+            return val;
+
+        return default;
+    }
+    
+    private static TypedKey<byte[]> GetImgKey(Uri uri)
+        => new($"image:{uri}");
+
+    public static ValueTask SetImageDataAsync(this IBotCache c, string key, byte[] data)
+        => c.SetImageDataAsync(new Uri(key), data);
+    public static async ValueTask SetImageDataAsync(this IBotCache c, Uri key, byte[] data)
+        => await c.AddAsync(GetImgKey(key), data, expiry: TimeSpan.FromHours(48));
+
+    public static async ValueTask<OneOf<byte[], None>> GetImageDataAsync(this IBotCache c, Uri key)
+        => await c.GetAsync(GetImgKey(key));
+
+    public static async Task<TimeSpan?> GetRatelimitAsync(
+        this IBotCache c,
+        TypedKey<long> key,
+        TimeSpan length)
+    {
+        var now = DateTime.UtcNow;
+        var nowB = now.ToBinary();
+
+        var cachedValue = await c.GetOrAddAsync(key,
+            () => Task.FromResult(now.ToBinary()),
+            expiry: length);
+
+        if (cachedValue == nowB)
+            return null;
+
+        var diff = now - DateTime.FromBinary(cachedValue);
+        return length - diff;
+    }
+}

src/NadekoBot/Common/Cache/IBotCache.cs

@@ -0,0 +1,47 @@
+using OneOf;
+using OneOf.Types;
+
+namespace NadekoBot.Common;
+
+public interface IBotCache
+{
+    /// <summary>
+    /// Adds an item to the cache
+    /// </summary>
+    /// <param name="key">Key to add</param>
+    /// <param name="value">Value to add to the cache</param>
+    /// <param name="expiry">Optional expiry</param>
+    /// <param name="overwrite">Whether old value should be overwritten</param>
+    /// <typeparam name="T">Type of the value</typeparam>
+    /// <returns>Returns whether add was sucessful. Always true unless ovewrite = false</returns>
+    ValueTask<bool> AddAsync<T>(TypedKey<T> key, T value, TimeSpan? expiry = null, bool overwrite = true);
+    
+    /// <summary>
+    /// Get an element from the cache
+    /// </summary>
+    /// <param name="key">Key</param>
+    /// <typeparam name="T">Type of the value</typeparam>
+    /// <returns>Either a value or <see cref="None"/></returns>
+    ValueTask<OneOf<T, None>> GetAsync<T>(TypedKey<T> key);
+    
+    /// <summary>
+    /// Remove a key from the cache
+    /// </summary>
+    /// <param name="key">Key to remove</param>
+    /// <typeparam name="T">Type of the value</typeparam>
+    /// <returns>Whether there was item</returns>
+    ValueTask<bool> RemoveAsync<T>(TypedKey<T> key);
+
+    /// <summary>
+    /// Get the key if it exists or add a new one
+    /// </summary>
+    /// <param name="key">Key to get and potentially add</param>
+    /// <param name="createFactory">Value creation factory</param>
+    /// <param name="expiry">Optional expiry</param>
+    /// <typeparam name="T">Type of the value</typeparam>
+    /// <returns>The retrieved or newly added value</returns>
+    ValueTask<T?> GetOrAddAsync<T>(
+        TypedKey<T> key,
+        Func<Task<T?>> createFactory,
+        TimeSpan? expiry = null);
+}

src/NadekoBot/Common/Cache/MemoryBotCache.cs

@@ -0,0 +1,71 @@
+using Microsoft.Extensions.Caching.Memory;
+using OneOf;
+using OneOf.Types;
+
+// ReSharper disable InconsistentlySynchronizedField
+
+namespace NadekoBot.Common;
+
+public sealed class MemoryBotCache : IBotCache
+{
+    // needed for overwrites and Delete return value
+    private readonly object _cacheLock = new object();
+    private readonly MemoryCache _cache;
+
+    public MemoryBotCache()
+    {
+        _cache = new MemoryCache(new MemoryCacheOptions());
+    }
+
+    public ValueTask<bool> AddAsync<T>(TypedKey<T> key, T value, TimeSpan? expiry = null, bool overwrite = true)
+    {
+        if (overwrite)
+        {
+            using var item = _cache.CreateEntry(key.Key);
+            item.Value = value;
+            item.AbsoluteExpirationRelativeToNow = expiry;
+            return new(true);
+        }
+        
+        lock (_cacheLock)
+        {
+            if (_cache.TryGetValue(key.Key, out var old) && old is not null)
+                return new(false);
+            
+            using var item = _cache.CreateEntry(key.Key);
+            item.Value = value;
+            item.AbsoluteExpirationRelativeToNow = expiry;
+            return new(true);
+        }
+    }
+
+    public async ValueTask<T?> GetOrAddAsync<T>(
+        TypedKey<T> key,
+        Func<Task<T?>> createFactory,
+        TimeSpan? expiry = null)
+        => await _cache.GetOrCreateAsync(key.Key,
+            async ce =>
+            {
+                ce.AbsoluteExpirationRelativeToNow = expiry;
+                var val = await createFactory();
+                return val;
+            });
+
+    public ValueTask<OneOf<T, None>> GetAsync<T>(TypedKey<T> key)
+    {
+        if (!_cache.TryGetValue(key.Key, out var val) || val is null)
+            return new(new None());
+
+        return new((T)val);
+    }
+
+    public ValueTask<bool> RemoveAsync<T>(TypedKey<T> key)
+    {
+        lock (_cacheLock)
+        {
+            var toReturn = _cache.TryGetValue(key.Key, out var old ) && old is not null;
+            _cache.Remove(key.Key);
+            return new(toReturn);
+        }
+    }
+}

src/NadekoBot/Common/Cache/RedisBotCache.cs

@@ -0,0 +1,119 @@
+using OneOf;
+using OneOf.Types;
+using StackExchange.Redis;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Common;
+
+public sealed class RedisBotCache : IBotCache
+{
+    private static readonly Type[] _supportedTypes = new []
+    {
+        typeof(bool), typeof(int), typeof(uint), typeof(long),
+        typeof(ulong), typeof(float), typeof(double),
+        typeof(string), typeof(byte[]), typeof(ReadOnlyMemory<byte>), typeof(Memory<byte>),
+        typeof(RedisValue),
+    };
+
+    private static readonly JsonSerializerOptions _opts = new()
+    {
+        PropertyNameCaseInsensitive = true,
+        NumberHandling = JsonNumberHandling.AllowReadingFromString,
+        AllowTrailingCommas = true,
+        IgnoreReadOnlyProperties = false,
+    };
+    private readonly ConnectionMultiplexer _conn;
+
+    public RedisBotCache(ConnectionMultiplexer conn)
+    {
+        _conn = conn;
+    }
+
+    public async ValueTask<bool> AddAsync<T>(TypedKey<T> key, T value, TimeSpan? expiry = null, bool overwrite = true)
+    {
+        // if a null value is passed, remove the key
+        if (value is null)
+        {
+            await RemoveAsync(key);
+            return false;
+        }
+        
+        var db = _conn.GetDatabase();
+        RedisValue val = IsSupportedType(typeof(T)) 
+            ? RedisValue.Unbox(value)
+            : JsonSerializer.Serialize(value, _opts);
+
+        var success = await db.StringSetAsync(key.Key,
+            val,
+            expiry: expiry,
+            when: overwrite ? When.Always : When.NotExists);
+
+        return success;
+    }
+
+    public bool IsSupportedType(Type type)
+    {
+        if (type.IsGenericType)
+        {
+            var typeDef = type.GetGenericTypeDefinition();
+            if (typeDef == typeof(Nullable<>))
+                return IsSupportedType(type.GenericTypeArguments[0]);
+        }
+
+        foreach (var t in _supportedTypes)
+        {
+            if (type == t)
+                return true;
+        }
+
+        return false;
+    }
+    
+    public async ValueTask<OneOf<T, None>> GetAsync<T>(TypedKey<T> key)
+    {
+        var db = _conn.GetDatabase();
+        var val = await db.StringGetAsync(key.Key);
+        if (val == default)
+            return new None();
+
+        if (IsSupportedType(typeof(T)))
+            return (T)((IConvertible)val).ToType(typeof(T), null);
+
+        return JsonSerializer.Deserialize<T>(val.ToString(), _opts)!;
+    }
+
+    public async ValueTask<bool> RemoveAsync<T>(TypedKey<T> key)
+    {
+        var db = _conn.GetDatabase();
+
+        return await db.KeyDeleteAsync(key.Key);
+    }
+
+    public async ValueTask<T?> GetOrAddAsync<T>(TypedKey<T> key, Func<Task<T?>> createFactory, TimeSpan? expiry = null)
+    {
+        var result = await GetAsync(key);
+
+        return await result.Match<Task<T?>>(
+            v => Task.FromResult<T?>(v),
+            async _ =>
+            {
+                var factoryValue = await createFactory();
+
+                if (factoryValue is null)
+                    return default;
+                
+                await AddAsync(key, factoryValue, expiry);
+                
+                // get again to make sure it's the cached value
+                // and not the late factory value, in case there's a race condition
+                
+                var newResult = await GetAsync(key);
+
+                // it's fine to do this, it should blow up if something went wrong.
+                return newResult.Match<T?>(
+                    v => v,
+                    _ => default);
+            });
+    }
+}

src/NadekoBot/Common/Configs/BotConfig.cs

@@ -12,7 +12,7 @@ namespace NadekoBot.Common.Configs;
 public sealed partial class BotConfig : ICloneable<BotConfig>
 {
     [Comment(@"DO NOT CHANGE")]
-    public int Version { get; set; } = 2;
+    public int Version { get; set; } = 3;
 
     [Comment(@"Most commands, when executed, have a small colored line
 next to the response. The color depends whether the command

src/NadekoBot/Common/Creds.cs

@@ -19,7 +19,10 @@ public sealed class Creds : IBotCredentials
     public bool UsePrivilegedIntents { get; set; }
 
     [Comment(@"The number of shards that the bot will be running on.
-Leave at 1 if you don't know what you're doing.")]
+Leave at 1 if you don't know what you're doing.
+
+note: If you are planning to have more than one shard, then you must change botCache to 'redis'.
+      Also, in that case you should be using NadekoBot.Coordinator to start the bot, and it will correctly override this value.")]
     public int TotalShards { get; set; }
 
     [Comment(   
@@ -51,7 +54,13 @@ go to https://www.patreon.com/portal -> my clients -> create client")]
     [Comment(@"Official cleverbot api key.")]
     public string CleverbotApiKey { get; set; }
     
-    [Comment(@"Redis connection string. Don't change if you don't know what you're doing.")]
+    [Comment(@"Which cache implementation should bot use.
+'memory' - Cache will be in memory of the bot's process itself. Only use this on bots with a single shard. When the bot is restarted the cache is reset. 
+'redis' - Uses redis (which needs to be separately downloaded and installed). The cache will persist through bot restarts. You can configure connection string in creds.yml")]
+    public BotCacheImplemenation BotCache { get; set; }
+    
+    [Comment(@"Redis connection string. Don't change if you don't know what you're doing.
+Only used if botCache is set to 'redis'")]
     public string RedisOptions { get; set; }
 
     [Comment(@"Database options. Don't change if you don't know what you're doing. Leave null for default values")]
@@ -104,12 +113,12 @@ Linux default
     args: ""NadekoBot.dll -- {0}""
 Windows default
     cmd: NadekoBot.exe
-    args: {0}")]
+    args: ""{0}""")]
     public RestartConfig RestartCommand { get; set; }
 
     public Creds()
     {
-        Version = 5;
+        Version = 6;
         Token = string.Empty;
         UsePrivilegedIntents = true;
         OwnerIds = new List<ulong>();
@@ -119,6 +128,7 @@ Windows default
         Patreon = new(string.Empty, string.Empty, string.Empty, string.Empty);
         BotListToken = string.Empty;
         CleverbotApiKey = string.Empty;
+        BotCache = BotCacheImplemenation.Memory;
         RedisOptions = "localhost:6379,syncTimeout=30000,responseTimeout=30000,allowAdmin=true,password=";
         Db = new()
         {
@@ -218,3 +228,9 @@ public class GoogleApiConfig
     public string SearchId { get; init; }
     public string ImageSearchId { get; init; }
 }
+
+public enum BotCacheImplemenation
+{
+    Memory,
+    Redis
+}

src/NadekoBot/Common/IBotCredentials.cs

@@ -26,6 +26,7 @@ public interface IBotCredentials
     string TwitchClientId { get; set; }
     string TwitchClientSecret { get; set; }
     GoogleApiConfig Google { get; set; }
+    BotCacheImplemenation BotCache { get; set; }
 }
 
 public class RestartConfig

src/NadekoBot/Common/ImageUrls.cs

@@ -1,9 +1,11 @@
 #nullable disable
 using NadekoBot.Common.Yml;
+using Cloneable;
 
 namespace NadekoBot.Common;
 
-public class ImageUrls
+[Cloneable]
+public partial class ImageUrls : ICloneable<ImageUrls> 
 {
     [Comment("DO NOT CHANGE")]
     public int Version { get; set; } = 3;

src/NadekoBot/Common/OneOfExtensions.cs

@@ -0,0 +1,10 @@
+using OneOf.Types;
+using OneOf;
+
+namespace NadekoBot.Common;
+
+public static class OneOfExtensions
+{
+    public static bool TryGetValue<T>(this OneOf<T, None> oneOf, out T value)
+        => oneOf.TryPickT0(out value, out _);
+}

src/NadekoBot/Common/Pokemon/SearchPokemon.cs

@@ -1,11 +1,12 @@
 #nullable disable
-using Newtonsoft.Json;
+
+using System.Text.Json.Serialization;
 
 namespace NadekoBot.Common.Pokemon;
 
 public class SearchPokemon
 {
-    [JsonProperty("num")]
+    [JsonPropertyName("num")]
     public int Id { get; set; }
 
     public string Species { get; set; }

src/NadekoBot/Db/Models/StreamOnlineMessage.cs

@@ -0,0 +1,13 @@
+#nullable disable
+using NadekoBot.Services.Database.Models;
+
+namespace NadekoBot.Db.Models;
+
+public class StreamOnlineMessage : DbEntity
+{
+    public ulong ChannelId { get; set; }
+    public ulong MessageId { get; set; }
+
+    public FollowedStream.FType Type { get; set; }
+    public string Name { get; set; }
+}

src/NadekoBot/Db/NadekoContext.cs

@@ -59,6 +59,9 @@ public abstract class NadekoContext : DbContext
 
     public DbSet<PatronQuota> PatronQuotas { get; set; }
     
+    public DbSet<StreamOnlineMessage> StreamOnlineMessages { get; set; }
+
+
     #region Mandatory Provider-Specific Values
 
     protected abstract string CurrencyTransactionOtherIdDefaultValue { get; }

src/NadekoBot/Migrations/MySql/20220623090718_stondel-db-cache.cs

@@ -0,0 +1,39 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace NadekoBot.Migrations.Mysql
+{
+    public partial class stondeldbcache : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "streamonlinemessages",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    channelid = table.Column<ulong>(type: "bigint unsigned", nullable: false),
+                    messageid = table.Column<ulong>(type: "bigint unsigned", nullable: false),
+                    type = table.Column<int>(type: "int", nullable: false),
+                    name = table.Column<string>(type: "longtext", nullable: true)
+                        .Annotation("MySql:CharSet", "utf8mb4"),
+                    dateadded = table.Column<DateTime>(type: "datetime(6)", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk_streamonlinemessages", x => x.id);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "streamonlinemessages");
+        }
+    }
+}

src/NadekoBot/Migrations/MySql/MysqlContextModelSnapshot.cs

@@ -16,7 +16,7 @@ namespace NadekoBot.Migrations.Mysql
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "6.0.5")
+                .HasAnnotation("ProductVersion", "6.0.6")
                 .HasAnnotation("Relational:MaxIdentifierLength", 64);
 
             modelBuilder.Entity("NadekoBot.Db.Models.BankUser", b =>
@@ -333,6 +333,39 @@ namespace NadekoBot.Migrations.Mysql
                     b.ToTable("patrons", (string)null);
                 });
 
+            modelBuilder.Entity("NadekoBot.Db.Models.StreamOnlineMessage", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasColumnName("id");
+
+                    b.Property<ulong>("ChannelId")
+                        .HasColumnType("bigint unsigned")
+                        .HasColumnName("channelid");
+
+                    b.Property<DateTime?>("DateAdded")
+                        .HasColumnType("datetime(6)")
+                        .HasColumnName("dateadded");
+
+                    b.Property<ulong>("MessageId")
+                        .HasColumnType("bigint unsigned")
+                        .HasColumnName("messageid");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("longtext")
+                        .HasColumnName("name");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("int")
+                        .HasColumnName("type");
+
+                    b.HasKey("Id")
+                        .HasName("pk_streamonlinemessages");
+
+                    b.ToTable("streamonlinemessages", (string)null);
+                });
+
             modelBuilder.Entity("NadekoBot.Services.Database.Models.AntiAltSetting", b =>
                 {
                     b.Property<int>("Id")

src/NadekoBot/Migrations/Postgresql/20220623090729_stondel-db-cache.cs

@@ -0,0 +1,37 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace NadekoBot.Migrations.PostgreSql
+{
+    public partial class stondeldbcache : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "streamonlinemessages",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    channelid = table.Column<decimal>(type: "numeric(20,0)", nullable: false),
+                    messageid = table.Column<decimal>(type: "numeric(20,0)", nullable: false),
+                    type = table.Column<int>(type: "integer", nullable: false),
+                    name = table.Column<string>(type: "text", nullable: true),
+                    dateadded = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk_streamonlinemessages", x => x.id);
+                });
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "streamonlinemessages");
+        }
+    }
+}

src/NadekoBot/Migrations/Postgresql/PostgreSqlContextModelSnapshot.cs

@@ -17,7 +17,7 @@ namespace NadekoBot.Migrations.PostgreSql
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "6.0.5")
+                .HasAnnotation("ProductVersion", "6.0.6")
                 .HasAnnotation("Relational:MaxIdentifierLength", 63);
 
             NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
@@ -343,6 +343,41 @@ namespace NadekoBot.Migrations.PostgreSql
                     b.ToTable("patrons", (string)null);
                 });
 
+            modelBuilder.Entity("NadekoBot.Db.Models.StreamOnlineMessage", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("ChannelId")
+                        .HasColumnType("numeric(20,0)")
+                        .HasColumnName("channelid");
+
+                    b.Property<DateTime?>("DateAdded")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("dateadded");
+
+                    b.Property<decimal>("MessageId")
+                        .HasColumnType("numeric(20,0)")
+                        .HasColumnName("messageid");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text")
+                        .HasColumnName("name");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("integer")
+                        .HasColumnName("type");
+
+                    b.HasKey("Id")
+                        .HasName("pk_streamonlinemessages");
+
+                    b.ToTable("streamonlinemessages", (string)null);
+                });
+
             modelBuilder.Entity("NadekoBot.Services.Database.Models.AntiAltSetting", b =>
                 {
                     b.Property<int>("Id")

src/NadekoBot/Migrations/Sqlite/20220623073903_stondel-db-cache.cs

@@ -0,0 +1,36 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace NadekoBot.Migrations
+{
+    public partial class stondeldbcache : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "StreamOnlineMessages",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    ChannelId = table.Column<ulong>(type: "INTEGER", nullable: false),
+                    MessageId = table.Column<ulong>(type: "INTEGER", nullable: false),
+                    Type = table.Column<int>(type: "INTEGER", nullable: false),
+                    Name = table.Column<string>(type: "TEXT", nullable: false),
+                    DateAdded = table.Column<DateTime>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_StreamOnlineMessages", x => x.Id);
+                });
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "StreamOnlineMessages");
+        }
+    }
+}

src/NadekoBot/Migrations/Sqlite/NadekoSqliteContextModelSnapshot.cs

@@ -15,7 +15,7 @@ namespace NadekoBot.Migrations
         protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
-            modelBuilder.HasAnnotation("ProductVersion", "6.0.5");
+            modelBuilder.HasAnnotation("ProductVersion", "6.0.6");
 
             modelBuilder.Entity("NadekoBot.Db.Models.BankUser", b =>
                 {
@@ -262,6 +262,33 @@ namespace NadekoBot.Migrations
                     b.ToTable("Patrons");
                 });
 
+            modelBuilder.Entity("NadekoBot.Db.Models.StreamOnlineMessage", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<ulong>("ChannelId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime?>("DateAdded")
+                        .HasColumnType("TEXT");
+
+                    b.Property<ulong>("MessageId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("StreamOnlineMessages");
+                });
+
             modelBuilder.Entity("NadekoBot.Services.Database.Models.AntiAltSetting", b =>
                 {
                     b.Property<int>("Id")

src/NadekoBot/Modules/Administration/Self/SelfCommands.cs

@@ -500,14 +500,6 @@ public partial class Administration
             await ReplyConfirmLocalizedAsync(strs.message_sent);
         }
 
-        [Cmd]
-        [OwnerOnly]
-        public async partial Task ImagesReload()
-        {
-            await _service.ReloadImagesAsync();
-            await ReplyConfirmLocalizedAsync(strs.images_loading);
-        }
-
         [Cmd]
         [OwnerOnly]
         public async partial Task StringsReload()

src/NadekoBot/Modules/Administration/Self/SelfService.cs

@@ -20,7 +20,6 @@ public sealed class SelfService : IExecNoCommand, IReadyExecutor, INService
 
     private ConcurrentDictionary<ulong?, ConcurrentDictionary<int, Timer>> autoCommands = new();
 
-    private readonly IImageCache _imgs;
     private readonly IHttpClientFactory _httpFactory;
     private readonly BotConfigService _bss;
     private readonly IPubSub _pubSub;
@@ -28,7 +27,6 @@ public sealed class SelfService : IExecNoCommand, IReadyExecutor, INService
 
     //keys
     private readonly TypedKey<ActivityPubData> _activitySetKey;
-    private readonly TypedKey<bool> _imagesReloadKey;
     private readonly TypedKey<string> _guildLeaveKey;
 
     public SelfService(
@@ -37,7 +35,6 @@ public sealed class SelfService : IExecNoCommand, IReadyExecutor, INService
         DbService db,
         IBotStrings strings,
         IBotCredentials creds,
-        IDataCache cache,
         IHttpClientFactory factory,
         BotConfigService bss,
         IPubSub pubSub,
@@ -48,20 +45,15 @@ public sealed class SelfService : IExecNoCommand, IReadyExecutor, INService
         _strings = strings;
         _client = client;
         _creds = creds;
-        _imgs = cache.LocalImages;
         _httpFactory = factory;
         _bss = bss;
         _pubSub = pubSub;
         _eb = eb;
         _activitySetKey = new("activity.set");
-        _imagesReloadKey = new("images.reload");
         _guildLeaveKey = new("guild.leave");
 
         HandleStatusChanges();
 
-        if (_client.ShardId == 0)
-            _pubSub.Sub(_imagesReloadKey, async _ => await _imgs.Reload());
-
         _pubSub.Sub(_guildLeaveKey,
             async input =>
             {
@@ -325,9 +317,6 @@ public sealed class SelfService : IExecNoCommand, IReadyExecutor, INService
         uow.SaveChanges();
     }
 
-    public Task ReloadImagesAsync()
-        => _pubSub.Pub(_imagesReloadKey, true);
-
     public bool ForwardMessages()
     {
         var isForwarding = false;

src/NadekoBot/Modules/Gambling/DiceRoll/DiceRollCommands.cs

@@ -19,8 +19,8 @@ public partial class Gambling
         private static readonly char[] _fateRolls = { '-', ' ', '+' };
         private readonly IImageCache _images;
 
-        public DiceRollCommands(IDataCache data)
+        public DiceRollCommands(ImageCache images)
-            => _images = data.LocalImages;
+            => _images = images;
 
         [Cmd]
         public async partial Task Roll()
@@ -31,10 +31,10 @@ public partial class Gambling
             var num1 = gen / 10;
             var num2 = gen % 10;
 
-            using var img1 = GetDice(num1);
+            using var img1 = await GetDiceAsync(num1);
-            using var img2 = GetDice(num2);
+            using var img2 = await GetDiceAsync(num2);
             using var img = new[] { img1, img2 }.Merge(out var format);
-            await using var ms = img.ToStream(format);
+            await using var ms = await img.ToStreamAsync(format);
             await ctx.Channel.SendFileAsync(ms,
                 $"dice.{format.FileExtensions.First()}",
                 Format.Bold(ctx.User.ToString()) + " " + GetText(strs.dice_rolled(Format.Code(gen.ToString()))));
@@ -96,7 +96,7 @@ public partial class Gambling
                 else
                     toInsert = dice.Count;
 
-                dice.Insert(toInsert, GetDice(randomNumber));
+                dice.Insert(toInsert, await GetDiceAsync(randomNumber));
                 values.Insert(toInsert, randomNumber);
             }
 
@@ -195,20 +195,19 @@ public partial class Gambling
             await ReplyConfirmLocalizedAsync(strs.dice_rolled(Format.Bold(rolled.ToString())));
         }
 
-        private Image<Rgba32> GetDice(int num)
+        private async Task<Image<Rgba32>> GetDiceAsync(int num)
         {
             if (num is < 0 or > 10)
                 throw new ArgumentOutOfRangeException(nameof(num));
 
             if (num == 10)
             {
-                var images = _images.Dice;
+                using var imgOne = Image.Load(await _images.GetDiceAsync(1));
-                using var imgOne = Image.Load(images[1]);
+                using var imgZero = Image.Load(await _images.GetDiceAsync(0));
-                using var imgZero = Image.Load(images[0]);
                 return new[] { imgOne, imgZero }.Merge();
             }
 
-            return Image.Load(_images.Dice[num]);
+            return Image.Load(await _images.GetDiceAsync(num));
         }
     }
 }

src/NadekoBot/Modules/Gambling/Draw/DrawCommands.cs

@@ -14,8 +14,8 @@ public partial class Gambling
         private static readonly ConcurrentDictionary<IGuild, Deck> _allDecks = new();
         private readonly IImageCache _images;
 
-        public DrawCommands(IDataCache data)
+        public DrawCommands(IImageCache images)
-            => _images = data.LocalImages;
+            => _images = images;
 
         private async Task<(Stream ImageStream, string ToSend)> InternalDraw(int num, ulong? guildId = null)
         {
@@ -43,7 +43,8 @@ public partial class Gambling
 
                 var currentCard = cards.Draw();
                 cardObjects.Add(currentCard);
-                images.Add(Image.Load(_images.GetCard(currentCard.ToString().ToLowerInvariant().Replace(' ', '_'))));
+                var cardName = currentCard.ToString().ToLowerInvariant().Replace(' ', '_');
+                images.Add(Image.Load(await File.ReadAllBytesAsync($"data/images/cards/{cardName}.png")));
             }
 
             using var img = images.Merge();

src/NadekoBot/Modules/Gambling/FlipCoin/FlipCoinCommands.cs

@@ -25,11 +25,17 @@ public partial class Gambling
         private static readonly NadekoRandom _rng = new();
         private readonly IImageCache _images;
         private readonly ICurrencyService _cs;
+        private readonly ImagesConfig _ic;
 
-        public FlipCoinCommands(IDataCache data, ICurrencyService cs, GamblingConfigService gss)
+        public FlipCoinCommands(
+            IImageCache images,
+            ImagesConfig ic,
+            ICurrencyService cs,
+            GamblingConfigService gss)
             : base(gss)
         {
-            _images = data.LocalImages;
+            _ic = ic;
+            _images = images;
             _cs = cs;
         }
 
@@ -47,8 +53,8 @@ public partial class Gambling
             var imgs = new Image<Rgba32>[count];
             for (var i = 0; i < count; i++)
             {
-                var headsArr = _images.Heads[_rng.Next(0, _images.Heads.Count)];
+                var headsArr = await _images.GetHeadsImageAsync();
-                var tailsArr = _images.Tails[_rng.Next(0, _images.Tails.Count)];
+                var tailsArr = await _images.GetTailsImageAsync();
                 if (_rng.Next(0, 10) < 5)
                 {
                     imgs[i] = Image.Load(headsArr);
@@ -94,7 +100,7 @@ public partial class Gambling
 
             BetFlipGuess result;
             Uri imageToSend;
-            var coins = _images.ImageUrls.Coins;
+            var coins = _ic.Data.Coins;
             if (_rng.Next(0, 1000) <= 499)
             {
                 imageToSend = coins.Heads[_rng.Next(0, coins.Heads.Length)];

src/NadekoBot/Modules/Gambling/Gambling.cs

@@ -38,7 +38,6 @@ public partial class Gambling : GamblingModule<GamblingService>
 
     private readonly DbService _db;
     private readonly ICurrencyService _cs;
-    private readonly IDataCache _cache;
     private readonly DiscordSocketClient _client;
     private readonly NumberFormatInfo _enUsCulture;
     private readonly DownloadTracker _tracker;
@@ -51,7 +50,6 @@ public partial class Gambling : GamblingModule<GamblingService>
     public Gambling(
         DbService db,
         ICurrencyService currency,
-        IDataCache cache,
         DiscordSocketClient client,
         DownloadTracker tracker,
         GamblingConfigService configService,
@@ -61,7 +59,6 @@ public partial class Gambling : GamblingModule<GamblingService>
     {
         _db = db;
         _cs = currency;
-        _cache = cache;
         _client = client;
         _bank = bank;
         _ps = ps;
@@ -124,7 +121,7 @@ public partial class Gambling : GamblingModule<GamblingService>
             return;
         }
 
-        if (_cache.AddTimelyClaim(ctx.User.Id, period) is { } rem)
+        if (await _service.ClaimTimelyAsync(ctx.User.Id, period) is { } rem)
         {
             var now = DateTime.UtcNow;
             var relativeTag = TimestampTag.FromDateTime(now.Add(rem), TimestampTagStyles.Relative);
@@ -145,7 +142,7 @@ public partial class Gambling : GamblingModule<GamblingService>
     [OwnerOnly]
     public async partial Task TimelyReset()
     {
-        _cache.RemoveAllTimelyClaims();
+        await _service.RemoveAllTimelyClaimsAsync();
         await ReplyConfirmLocalizedAsync(strs.timely_reset);
     }
 

src/NadekoBot/Modules/Gambling/GamblingService.cs

@@ -1,16 +1,13 @@
 #nullable disable
 using LinqToDB;
 using LinqToDB.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore;
 using NadekoBot.Common.ModuleBehaviors;
 using NadekoBot.Db;
 using NadekoBot.Db.Models;
-using NadekoBot.Migrations;
 using NadekoBot.Modules.Gambling.Common;
 using NadekoBot.Modules.Gambling.Common.Connect4;
 using NadekoBot.Modules.Gambling.Common.Slot;
 using NadekoBot.Modules.Gambling.Common.WheelOfFortune;
-using Newtonsoft.Json;
 
 namespace NadekoBot.Modules.Gambling.Services;
 
@@ -22,7 +19,7 @@ public class GamblingService : INService, IReadyExecutor
     private readonly ICurrencyService _cs;
     private readonly Bot _bot;
     private readonly DiscordSocketClient _client;
-    private readonly IDataCache _cache;
+    private readonly IBotCache _cache;
     private readonly GamblingConfigService _gss;
 
     public GamblingService(
@@ -30,7 +27,7 @@ public class GamblingService : INService, IReadyExecutor
         Bot bot,
         ICurrencyService cs,
         DiscordSocketClient client,
-        IDataCache cache,
+        IBotCache cache,
         GamblingConfigService gss)
     {
         _db = db;
@@ -73,6 +70,7 @@ public class GamblingService : INService, IReadyExecutor
         }
     }
 
+    private static readonly TypedKey<long> _curDecayKey = new("currency:last_decay");
     private async Task CurrencyDecayLoopAsync()
     {
         if (_bot.Client.ShardId != 0)
@@ -88,11 +86,16 @@ public class GamblingService : INService, IReadyExecutor
                 if (config.Decay.Percent is <= 0 or > 1 || maxDecay < 0)
                     continue;
 
-                await using var uow = _db.GetDbContext();
+                var now = DateTime.UtcNow;
-                var lastCurrencyDecay = _cache.GetLastCurrencyDecay();
                 
-                if (DateTime.UtcNow - lastCurrencyDecay < TimeSpan.FromHours(config.Decay.HourInterval))
+                await using var uow = _db.GetDbContext();
+                var result = await _cache.GetAsync(_curDecayKey);
+
+                if (result.TryPickT0(out var bin, out _)
+                    && (now - DateTime.FromBinary(bin) < TimeSpan.FromHours(config.Decay.HourInterval)))
+                {
                     continue;
+                }
 
                 Log.Information(@"Decaying users' currency - decay: {ConfigDecayPercent}% 
                                     | max: {MaxDecay} 
@@ -115,8 +118,9 @@ public class GamblingService : INService, IReadyExecutor
                                      : old.CurrencyAmount - maxDecay 
                          });
 
-                _cache.SetLastCurrencyDecay();
                 await uow.SaveChangesAsync();
+
+                await _cache.AddAsync(_curDecayKey, now.ToBinary());
             }
             catch (Exception ex)
             {
@@ -161,34 +165,21 @@ public class GamblingService : INService, IReadyExecutor
         return toReturn;
     }
 
+    private static readonly TypedKey<EconomyResult> _ecoKey = new("nadeko:economy");
+
     public async Task<EconomyResult> GetEconomyAsync()
     {
-        if (_cache.TryGetEconomy(out var data))
+        var data = await _cache.GetOrAddAsync(_ecoKey,
+            async () =>
             {
-            try
+                await using var uow = _db.GetDbContext();
-            {
+                var cash = uow.DiscordUser.GetTotalCurrency();
-                return JsonConvert.DeserializeObject<EconomyResult>(data);
+                var onePercent = uow.DiscordUser.GetTopOnePercentCurrency(_client.CurrentUser.Id);
-            }
+                decimal planted = uow.PlantedCurrency.AsQueryable().Sum(x => x.Amount);
-            catch { }
+                var waifus = uow.WaifuInfo.GetTotalValue();
-        }
+                var bot = uow.DiscordUser.GetUserCurrency(_client.CurrentUser.Id);
-
+                decimal bank = await uow.GetTable<BankUser>()
-        decimal cash;
-        decimal onePercent;
-        decimal planted;
-        decimal waifus;
-        decimal bank;
-        long bot;
-
-        using (var uow = _db.GetDbContext())
-        {
-            cash = uow.DiscordUser.GetTotalCurrency();
-            onePercent = uow.DiscordUser.GetTopOnePercentCurrency(_client.CurrentUser.Id);
-            planted = uow.PlantedCurrency.AsQueryable().Sum(x => x.Amount);
-            waifus = uow.WaifuInfo.GetTotalValue();
-            bot = uow.DiscordUser.GetUserCurrency(_client.CurrentUser.Id);
-            bank = await uow.GetTable<BankUser>()
                                         .SumAsyncLinqToDB(x => x.Balance);
-        }
 
                 var result = new EconomyResult
                 {
@@ -200,21 +191,74 @@ public class GamblingService : INService, IReadyExecutor
                     Bank = bank
                 };
 
-        _cache.SetEconomy(JsonConvert.SerializeObject(result));
                 return result;
+            },
+            TimeSpan.FromMinutes(3));
+
+        return data;
     }
 
     public Task<WheelOfFortuneGame.Result> WheelOfFortuneSpinAsync(ulong userId, long bet)
         => new WheelOfFortuneGame(userId, bet, _gss.Data, _cs).SpinAsync();
 
 
-    public struct EconomyResult
+    private static readonly SemaphoreSlim _timelyLock = new (1, 1);
+
+    private static TypedKey<Dictionary<ulong, long>> _timelyKey
+        = new("timely:claims");
+    public async Task<TimeSpan?> ClaimTimelyAsync(ulong userId, int period)
     {
-        public decimal Cash { get; set; }
+        if (period == 0)
-        public decimal Planted { get; set; }
+            return null;
-        public decimal Waifus { get; set; }
+
-        public decimal OnePercent { get; set; }
+        await _timelyLock.WaitAsync();
-        public decimal Bank { get; set; }
+        try
-        public long Bot { get; set; }
+        {
+            // get the dictionary from the cache or get a new one
+            var dict = (await _cache.GetOrAddAsync(_timelyKey,
+                () => Task.FromResult(new Dictionary<ulong, long>())))!;
+
+            var now = DateTime.UtcNow;
+            var nowB = now.ToBinary();
+
+            // try to get users last claim
+            if (!dict.TryGetValue(userId, out var lastB))
+                lastB = dict[userId] = now.ToBinary();
+
+            var diff = now - DateTime.FromBinary(lastB);
+
+            // if its now, or too long ago => success
+            if (lastB == nowB || diff > period.Hours())
+            {
+                // update the cache
+                dict[userId] = nowB;
+                await _cache.AddAsync(_timelyKey, dict);
+                
+                return null;
+            }
+            else
+            {
+                // otherwise return the remaining time
+                return period.Hours() - diff;
+            }
+        }
+        finally
+        {
+            await _timelyLock.WaitAsync();
+        }
+    }
+
+    public async Task RemoveAllTimelyClaimsAsync()
+        => await _cache.RemoveAsync(_timelyKey);
+
+
+    public readonly struct EconomyResult
+    {
+        public decimal Cash { get; init; }
+        public decimal Planted { get; init; }
+        public decimal Waifus { get; init; }
+        public decimal OnePercent { get; init; }
+        public decimal Bank { get; init; }
+        public long Bot { get; init; }
     }
 }

src/NadekoBot/Modules/Gambling/PlantPick/PlantPickService.cs

@@ -34,7 +34,7 @@ public class PlantPickService : INService, IExecNoCommand
         DbService db,
         CommandHandler cmd,
         IBotStrings strings,
-        IDataCache cache,
+        IImageCache images,
         FontProvider fonts,
         ICurrencyService cs,
         CommandHandler cmdHandler,
@@ -43,7 +43,7 @@ public class PlantPickService : INService, IExecNoCommand
     {
         _db = db;
         _strings = strings;
-        _images = cache.LocalImages;
+        _images = images;
         _fonts = fonts;
         _cs = cs;
         _cmdHandler = cmdHandler;
@@ -110,30 +110,21 @@ public class PlantPickService : INService, IExecNoCommand
     /// <param name="pass">Optional password to add to top left corner.</param>
     /// <param name="extension">Extension of the file, defaults to png</param>
     /// <returns>Stream of the currency image</returns>
-    public Stream GetRandomCurrencyImage(string pass, out string extension)
+    public async Task<(Stream, string)> GetRandomCurrencyImageAsync(string pass)
     {
-        // get a random currency image bytes
+        var curImg = await _images.GetCurrencyImageAsync();
-        var rng = new NadekoRandom();
-        var curImg = _images.Currency[rng.Next(0, _images.Currency.Count)];
 
         if (string.IsNullOrWhiteSpace(pass))
         {
             // determine the extension
-            using (_ = Image.Load(curImg, out var format))
+            using var load = _ = Image.Load(curImg, out var format);
-            {
-                extension = format.FileExtensions.FirstOrDefault() ?? "png";
-            }
 
             // return the image
-            return curImg.ToStream();
+            return (curImg.ToStream(), format.FileExtensions.FirstOrDefault() ?? "png");
         }
 
         // get the image stream and extension
-        var (s, ext) = AddPassword(curImg, pass);
+        return AddPassword(curImg, pass);
-        // set the out extension parameter to the extension we've got
-        extension = ext;
-        // return the image
-        return s;
     }
 
     /// <summary>
@@ -214,10 +205,10 @@ public class PlantPickService : INService, IExecNoCommand
                         var pw = config.Generation.HasPassword ? GenerateCurrencyPassword().ToUpperInvariant() : null;
 
                         IUserMessage sent;
-                        await using (var stream = GetRandomCurrencyImage(pw, out var ext))
+                        var (stream, ext) = await GetRandomCurrencyImageAsync(pw);
-                        {
+
+                        await using (stream)
                             sent = await channel.SendFileAsync(stream, $"currency_image.{ext}", toSend);
-                        }
 
                         await AddPlantToDatabase(channel.GuildId,
                             channel.Id,
@@ -278,7 +269,7 @@ public class PlantPickService : INService, IExecNoCommand
                 if (amount > 0)
                     // give the picked currency to the user
                     await _cs.AddAsync(uid, amount, new("currency", "collect"));
-                uow.SaveChanges();
+                await uow.SaveChangesAsync();
             }
 
             try
@@ -316,12 +307,15 @@ public class PlantPickService : INService, IExecNoCommand
                 msgToSend += " " + GetText(gid, strs.pick_sn(prefix));
 
             //get the image
-            await using var stream = GetRandomCurrencyImage(pass, out var ext);
+            var (stream, ext) = await GetRandomCurrencyImageAsync(pass);
             // send it
+            await using (stream)
+            {
                 var msg = await ch.SendFileAsync(stream, $"img.{ext}", msgToSend);
                 // return sent message's id (in order to be able to delete it when it's picked)
                 return msg.Id;
             }
+        }
         catch
         {
             // if sending fails, return null as message id

src/NadekoBot/Modules/Gambling/Slot/SlotCommands.cs

@@ -32,13 +32,13 @@ public partial class Gambling
         private readonly DbService _db;
 
         public SlotCommands(
-            IDataCache data,
+            ImageCache images,
             FontProvider fonts,
             DbService db,
             GamblingConfigService gamb)
             : base(gamb)
         {
-            _images = data.LocalImages;
+            _images = images;
             _fonts = fonts;
             _db = db;
         }
@@ -130,7 +130,8 @@ public partial class Gambling
                                   ?? 0;
                 }
 
-                using (var bgImage = Image.Load<Rgba32>(_images.SlotBackground, out _))
+                var slotBg = await _images.GetSlotBgAsync();
+                using (var bgImage = Image.Load<Rgba32>(slotBg, out _))
                 {
                     var numbers = new int[3];
                     result.Rolls.CopyTo(numbers, 0);
@@ -184,7 +185,7 @@ public partial class Gambling
 
                     for (var i = 0; i < 3; i++)
                     {
-                        using var img = Image.Load(_images.SlotEmojis[numbers[i]]);
+                        using var img = Image.Load(await _images.GetSlotEmojiAsync(numbers[i]));
                         bgImage.Mutate(x => x.DrawImage(img, new Point(148 + (105 * i), 217), 1f));
                     }
 
@@ -201,7 +202,7 @@ public partial class Gambling
                             msg = GetText(strs.slot_jackpot(30));
                     }
 
-                    await using (var imgStream = bgImage.ToStream())
+                    await using (var imgStream = await bgImage.ToStreamAsync())
                     {
                         await ctx.Channel.SendFileAsync(imgStream,
                             "result.png",

src/NadekoBot/Modules/Gambling/Waifus/WaifuService.cs

@@ -1,5 +1,6 @@
 #nullable disable
 using LinqToDB;
+using LinqToDB.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore;
 using NadekoBot.Common.ModuleBehaviors;
 using NadekoBot.Db;
@@ -14,7 +15,7 @@ public class WaifuService : INService, IReadyExecutor
 {
     private readonly DbService _db;
     private readonly ICurrencyService _cs;
-    private readonly IDataCache _cache;
+    private readonly IBotCache _cache;
     private readonly GamblingConfigService _gss;
     private readonly IBotCredentials _creds;
     private readonly DiscordSocketClient _client;
@@ -22,7 +23,7 @@ public class WaifuService : INService, IReadyExecutor
     public WaifuService(
         DbService db,
         ICurrencyService cs,
-        IDataCache cache,
+        IBotCache cache,
         GamblingConfigService gss,
         IBotCredentials creds,
         DiscordSocketClient client)
@@ -236,8 +237,13 @@ public class WaifuService : INService, IReadyExecutor
             var newAff = target is null ? null : uow.GetOrCreateUser(target);
             if (w?.Affinity?.UserId == target?.Id)
             {
+                return (null, false, null);
             }
-            else if (!_cache.TryAddAffinityCooldown(user.Id, out remaining))
+
+            remaining = await _cache.GetRatelimitAsync(GetAffinityKey(user.Id),
+                30.Minutes());
+            
+            if (remaining is not null)
             {
             }
             else if (w is null)
@@ -294,6 +300,12 @@ public class WaifuService : INService, IReadyExecutor
         return uow.WaifuInfo.GetWaifuUserId(ownerId, name);
     }
 
+    private static TypedKey<long> GetDivorceKey(ulong userId)
+        => new($"waifu:divorce_cd:{userId}");
+    
+    private static TypedKey<long> GetAffinityKey(ulong userId)
+        => new($"waifu:affinity:{userId}");
+    
     public async Task<(WaifuInfo, DivorceResult, long, TimeSpan?)> DivorceWaifuAsync(IUser user, ulong targetId)
     {
         DivorceResult result;
@@ -305,10 +317,15 @@ public class WaifuService : INService, IReadyExecutor
             w = uow.WaifuInfo.ByWaifuUserId(targetId);
             if (w?.Claimer is null || w.Claimer.UserId != user.Id)
                 result = DivorceResult.NotYourWife;
-            else if (!_cache.TryAddDivorceCooldown(user.Id, out remaining))
-                result = DivorceResult.Cooldown;
             else
             {
+                remaining = await _cache.GetRatelimitAsync(GetDivorceKey(user.Id), 6.Hours());
+                if (remaining is TimeSpan rem)
+                {
+                    result = DivorceResult.Cooldown;
+                    return (w, result, amount, rem);
+                }
+
                 amount = w.Price / 2;
 
                 if (w.Affinity?.UserId == user.Id)
@@ -486,13 +503,13 @@ public class WaifuService : INService, IReadyExecutor
                    .ToList();
     }
 
+    private static readonly TypedKey<long> _waifuDecayKey = $"waifu:last_decay";
     public async Task OnReadyAsync()
     {
         // only decay waifu values from shard 0
         if (_client.ShardId != 0)
             return;
 
-        var redisKey = $"{_creds.RedisKey()}_last_waifu_decay";
         while (true)
         {
             try
@@ -504,28 +521,31 @@ public class WaifuService : INService, IReadyExecutor
                 if (multi is < 0f or > 1f || decayInterval < 0)
                     continue;
 
-                var val = await _cache.Redis.GetDatabase().StringGetAsync(redisKey);
+                var now = DateTime.UtcNow;
-                if (val != default)
+                var nowB = now.ToBinary();
+
+                var result = await _cache.GetAsync(_waifuDecayKey);
+                
+                if (result.TryGetValue(out var val))
                 {
-                    var lastDecay = DateTime.FromBinary((long)val);
+                    var lastDecay = DateTime.FromBinary(val);
                     var toWait = decayInterval.Hours() - (DateTime.UtcNow - lastDecay);
 
                     if (toWait > 0.Hours())
                         continue;
                 }
 
-                await _cache.Redis.GetDatabase().StringSetAsync(redisKey, DateTime.UtcNow.ToBinary());
+                await _cache.AddAsync(_waifuDecayKey, nowB);
 
                 await using var uow = _db.GetDbContext();
 
-                await uow.WaifuInfo
+                await uow.GetTable<WaifuInfo>()
                          .Where(x => x.Price > minPrice && x.ClaimerId == null)
                          .UpdateAsync(old => new()
                          {
                              Price = (long)(old.Price * multi)
                          });
 
-                await uow.SaveChangesAsync();
             }
             catch (Exception ex)
             {

src/NadekoBot/Modules/Games/Games.cs

@@ -14,9 +14,9 @@ public partial class Games : NadekoModule<GamesService>
     private readonly IHttpClientFactory _httpFactory;
     private readonly Random _rng = new();
 
-    public Games(IDataCache data, IHttpClientFactory factory)
+    public Games(IImageCache images, IHttpClientFactory factory)
     {
-        _images = data.LocalImages;
+        _images = images;
         _httpFactory = factory;
     }
 

src/NadekoBot/Modules/Games/GirlRating.cs

@@ -28,11 +28,12 @@ public class GirlRating
         Roll = roll;
         Advice = advice; // convenient to have it here, even though atm there are only few different ones.
 
-        Stream = new(() =>
+        Stream = new(async () =>
         {
             try
             {
-                using var img = Image.Load(_images.RategirlMatrix);
+                var bgBytes = await _images.GetRategirlBgAsync();
+                using var img = Image.Load(bgBytes);
                 const int minx = 35;
                 const int miny = 385;
                 const int length = 345;
@@ -40,7 +41,8 @@ public class GirlRating
                 var pointx = (int)(minx + (length * (Hot / 10)));
                 var pointy = (int)(miny - (length * ((Crazy - 4) / 6)));
 
-                using (var pointImg = Image.Load(_images.RategirlDot))
+                var dotBytes = await _images.GetRategirlDotAsync(); 
+                using (var pointImg = Image.Load(dotBytes))
                 {
                     img.Mutate(x => x.DrawImage(pointImg, new(pointx - 10, pointy - 10), new GraphicsOptions()));
                 }

src/NadekoBot/Modules/Games/Trivia/TriviaCommands.cs

@@ -9,14 +9,14 @@ public partial class Games
     [Group]
     public partial class TriviaCommands : NadekoModule<GamesService>
     {
-        private readonly IDataCache _cache;
+        private readonly ILocalDataCache _cache;
         private readonly ICurrencyService _cs;
         private readonly GamesConfigService _gamesConfig;
         private readonly DiscordSocketClient _client;
 
         public TriviaCommands(
             DiscordSocketClient client,
-            IDataCache cache,
+            ILocalDataCache cache,
             ICurrencyService cs,
             GamesConfigService gamesConfig)
         {

src/NadekoBot/Modules/Games/Trivia/TriviaGame.cs

@@ -17,7 +17,7 @@ public class TriviaGame
     public bool GameActive { get; private set; }
     public bool ShouldStopGame { get; private set; }
     private readonly SemaphoreSlim _guessLock = new(1, 1);
-    private readonly IDataCache _cache;
+    private readonly ILocalDataCache _cache;
     private readonly IBotStrings _strings;
     private readonly DiscordSocketClient _client;
     private readonly GamesConfig _config;
@@ -35,7 +35,7 @@ public class TriviaGame
         IBotStrings strings,
         DiscordSocketClient client,
         GamesConfig config,
-        IDataCache cache,
+        ILocalDataCache cache,
         ICurrencyService cs,
         IGuild guild,
         ITextChannel channel,
@@ -70,7 +70,7 @@ public class TriviaGame
             showHowToQuit = !showHowToQuit;
 
             // load question
-            CurrentQuestion = _questionPool.GetRandomQuestion(OldQuestions, _options.IsPokemon);
+            CurrentQuestion = await _questionPool.GetRandomQuestionAsync(OldQuestions, _options.IsPokemon);
             if (string.IsNullOrWhiteSpace(CurrentQuestion?.Answer)
                 || string.IsNullOrWhiteSpace(CurrentQuestion.Question))
             {

src/NadekoBot/Modules/Games/Trivia/TriviaQuestion.cs

@@ -4,6 +4,15 @@ using System.Text.RegularExpressions;
 // THANKS @ShoMinamimoto for suggestions and coding help
 namespace NadekoBot.Modules.Games.Common.Trivia;
 
+public sealed class TriviaQuestionModel
+{
+    public string Category { get; init; }
+    public string Question { get; init; }
+    public string ImageUrl { get; init; }
+    public string AnswerImageUrl { get; init; }
+    public string Answer { get; init; }
+}
+
 public class TriviaQuestion
 {
     public const int MAX_STRING_LENGTH = 22;
@@ -17,29 +26,30 @@ public class TriviaQuestion
         new(22, 3)
     };
 
-    public string Category { get; set; }
+    public string Category
-    public string Question { get; set; }
+        => _qModel.Category;
-    public string ImageUrl { get; set; }
+
-    public string AnswerImageUrl { get; set; }
+    public string Question
-    public string Answer { get; set; }
+        => _qModel.Question;
+
+    public string ImageUrl
+        => _qModel.ImageUrl;
+
+    public string AnswerImageUrl
+        => _qModel.AnswerImageUrl ?? ImageUrl;
+
+    public string Answer
+        => _qModel.Answer;
 
     public string CleanAnswer
         => cleanAnswer ?? (cleanAnswer = Clean(Answer));
 
     private string cleanAnswer;
+    private readonly TriviaQuestionModel _qModel;
 
-    public TriviaQuestion(
+    public TriviaQuestion(TriviaQuestionModel qModel)
-        string q,
-        string a,
-        string c,
-        string img = null,
-        string answerImage = null)
     {
-        Question = q;
+        _qModel = qModel;
-        Answer = a;
-        Category = c;
-        ImageUrl = img;
-        AnswerImageUrl = answerImage ?? img;
     }
 
     public string GetHint()

src/NadekoBot/Modules/Games/Trivia/TriviaQuestionPool.cs

@@ -1,45 +1,48 @@
-#nullable disable
 namespace NadekoBot.Modules.Games.Common.Trivia;
 
 public class TriviaQuestionPool
 {
-    private TriviaQuestion[] Pool
+    private readonly ILocalDataCache _cache;
-        => _cache.LocalData.TriviaQuestions;
-
-    private IReadOnlyDictionary<int, string> Map
-        => _cache.LocalData.PokemonMap;
-
-    private readonly IDataCache _cache;
     private readonly int _maxPokemonId;
 
     private readonly NadekoRandom _rng = new();
 
-    public TriviaQuestionPool(IDataCache cache)
+    public TriviaQuestionPool(ILocalDataCache cache)
     {
         _cache = cache;
         _maxPokemonId = 721; //xd
     }
 
-    public TriviaQuestion GetRandomQuestion(HashSet<TriviaQuestion> exclude, bool isPokemon)
+    public async Task<TriviaQuestion?> GetRandomQuestionAsync(HashSet<TriviaQuestion> exclude, bool isPokemon)
     {
-        if (Pool.Length == 0)
-            return null;
-
         if (isPokemon)
         {
+            var pokes = await _cache.GetPokemonMapAsync();
+
+            if (pokes is null or { Length: 0 })
+                return default;
+            
             var num = _rng.Next(1, _maxPokemonId + 1);
-            return new("Who's That Pokémon?",
+            return new(new()
-                Map[num].ToTitleCase(),
+            {
-                "Pokemon",
+                Question = "Who's That Pokémon?",
-                $@"https://nadeko.bot/images/pokemon/shadows/{num}.png",
+                Answer = pokes[num].Name.ToTitleCase(),
-                $@"https://nadeko.bot/images/pokemon/real/{num}.png");
+                Category = "Pokemon",
+                ImageUrl = $@"https://nadeko.bot/images/pokemon/shadows/{num}.png",
+                AnswerImageUrl = $@"https://nadeko.bot/images/pokemon/real/{num}.png"
+            });
         }
 
         TriviaQuestion randomQuestion;
-        while (exclude.Contains(randomQuestion = Pool[_rng.Next(0, Pool.Length)]))
+        var pool = await _cache.GetTriviaQuestionsAsync();
+        
+        if(pool is null)
+            return default;
+        
+        while (exclude.Contains(randomQuestion = new(pool[_rng.Next(0, pool.Length)])))
         {
             // if too many questions are excluded, clear the exclusion list and start over
-            if (exclude.Count > Pool.Length / 10 * 9)
+            if (exclude.Count > pool.Length / 10 * 9)
             {
                 exclude.Clear();
                 break;

src/NadekoBot/Modules/Music/_Common/Impl/RedisTrackCacher.cs

@@ -1,209 +0,0 @@
-using StackExchange.Redis;
-using System.Runtime.CompilerServices;
-using System.Text.Json;
-
-namespace NadekoBot.Modules.Music;
-
-public sealed class RedisTrackCacher : ITrackCacher
-{
-    private readonly ConnectionMultiplexer _multiplexer;
-
-    public RedisTrackCacher(ConnectionMultiplexer multiplexer)
-        => _multiplexer = multiplexer;
-
-    public async Task<string?> GetOrCreateStreamLink(
-        string id,
-        MusicPlatform platform,
-        Func<Task<(string StreamUrl, TimeSpan Expiry)>> streamUrlFactory)
-    {
-        var trackStreamKey = CreateStreamKey(id, platform);
-
-        var value = await GetStreamFromCacheInternalAsync(trackStreamKey);
-
-        // if there is no cached value
-        if (value == default)
-        {
-            // otherwise retrieve and cache a new value, and run this method again
-            var success = await CreateAndCacheStreamUrlAsync(trackStreamKey, streamUrlFactory);
-            if (!success)
-                return null;
-
-            return await GetOrCreateStreamLink(id, platform, streamUrlFactory);
-        }
-
-        // cache new one for future use
-        _ = Task.Run(() => CreateAndCacheStreamUrlAsync(trackStreamKey, streamUrlFactory));
-
-        return value;
-    }
-
-
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static string CreateStreamKey(string id, MusicPlatform platform)
-        => $"track:stream:{platform}:{id}";
-
-    private async Task<bool> CreateAndCacheStreamUrlAsync(
-        string trackStreamKey,
-        Func<Task<(string StreamUrl, TimeSpan Expiry)>> factory)
-    {
-        try
-        {
-            var data = await factory();
-            if (data == default)
-                return false;
-
-            await CacheStreamUrlInternalAsync(trackStreamKey, data.StreamUrl, data.Expiry);
-            return true;
-        }
-        catch (Exception ex)
-        {
-            Log.Error(ex, "Error resolving stream link for {TrackCacheKey}", trackStreamKey);
-            return false;
-        }
-    }
-
-    public Task CacheStreamUrlAsync(
-        string id,
-        MusicPlatform platform,
-        string url,
-        TimeSpan expiry)
-        => CacheStreamUrlInternalAsync(CreateStreamKey(id, platform), url, expiry);
-
-    private async Task CacheStreamUrlInternalAsync(string trackStreamKey, string url, TimeSpan expiry)
-    {
-        // keys need to be expired after an hour
-        // to make sure client doesn't get an expired stream url
-        // to achieve this, track keys will be just pointers to real data
-        // but that data will expire
-
-        var db = _multiplexer.GetDatabase();
-        var dataKey = $"entry:{Guid.NewGuid()}:{trackStreamKey}";
-        await db.StringSetAsync(dataKey, url, expiry);
-        await db.ListRightPushAsync(trackStreamKey, dataKey);
-    }
-
-    private async Task<string?> GetStreamFromCacheInternalAsync(string trackStreamKey)
-    {
-        // Job of the method which retrieves keys is to pop the elements
-        // from the list of cached trackurls until it finds a non-expired key
-
-        var db = _multiplexer.GetDatabase();
-        while (true)
-        {
-            string? dataKey = await db.ListLeftPopAsync(trackStreamKey);
-            if (dataKey == default)
-                return null;
-
-            var streamUrl = await db.StringGetAsync(dataKey);
-            if (streamUrl == default)
-                continue;
-
-            return streamUrl;
-        }
-    }
-
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static string CreateCachedDataKey(string id, MusicPlatform platform)
-        => $"track:data:{platform}:{id}";
-
-    public Task CacheTrackDataAsync(ICachableTrackData data)
-    {
-        var db = _multiplexer.GetDatabase();
-
-        var trackDataKey = CreateCachedDataKey(data.Id, data.Platform);
-        var dataString = JsonSerializer.Serialize((object)data);
-        // cache for 1 day
-        return db.StringSetAsync(trackDataKey, dataString, TimeSpan.FromDays(1));
-    }
-
-    public async Task<ICachableTrackData?> GetCachedDataByIdAsync(string id, MusicPlatform platform)
-    {
-        var db = _multiplexer.GetDatabase();
-
-        var trackDataKey = CreateCachedDataKey(id, platform);
-        var data = await db.StringGetAsync(trackDataKey);
-        if (data == default)
-            return null;
-
-        return JsonSerializer.Deserialize<CachableTrackData>(data);
-    }
-
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static string CreateCachedQueryDataKey(string query, MusicPlatform platform)
-        => $"track:query_to_id:{platform}:{query}";
-
-    public async Task<ICachableTrackData?> GetCachedDataByQueryAsync(string query, MusicPlatform platform)
-    {
-        query = Uri.EscapeDataString(query.Trim());
-
-        var db = _multiplexer.GetDatabase();
-        var queryDataKey = CreateCachedQueryDataKey(query, platform);
-
-        var trackId = await db.StringGetAsync(queryDataKey);
-        if (trackId == default)
-            return null;
-
-        return await GetCachedDataByIdAsync(trackId, platform);
-    }
-
-    public async Task CacheTrackDataByQueryAsync(string query, ICachableTrackData data)
-    {
-        query = Uri.EscapeDataString(query.Trim());
-
-        // first cache the data
-        await CacheTrackDataAsync(data);
-
-        // then map the query to cached data's id
-        var db = _multiplexer.GetDatabase();
-
-        var queryDataKey = CreateCachedQueryDataKey(query, data.Platform);
-        await db.StringSetAsync(queryDataKey, data.Id, TimeSpan.FromDays(7));
-    }
-
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static string CreateCachedPlaylistKey(string playlistId, MusicPlatform platform)
-        => $"playlist:{platform}:{playlistId}";
-
-    public async Task<IReadOnlyCollection<string>> GetPlaylistTrackIdsAsync(string playlistId, MusicPlatform platform)
-    {
-        var db = _multiplexer.GetDatabase();
-        var key = CreateCachedPlaylistKey(playlistId, platform);
-        var vals = await db.ListRangeAsync(key);
-        if (vals == default || vals.Length == 0)
-            return Array.Empty<string>();
-
-        return vals.Select(x => x.ToString()).ToList();
-    }
-
-    public async Task CachePlaylistTrackIdsAsync(string playlistId, MusicPlatform platform, IEnumerable<string> ids)
-    {
-        var db = _multiplexer.GetDatabase();
-        var key = CreateCachedPlaylistKey(playlistId, platform);
-        await db.ListRightPushAsync(key, ids.Select(x => (RedisValue)x).ToArray());
-        await db.KeyExpireAsync(key, TimeSpan.FromDays(7));
-    }
-
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static string CreateCachedPlaylistQueryKey(string query, MusicPlatform platform)
-        => $"playlist:query:{platform}:{query}";
-
-    public Task CachePlaylistIdByQueryAsync(string query, MusicPlatform platform, string playlistId)
-    {
-        query = Uri.EscapeDataString(query.Trim());
-        var key = CreateCachedPlaylistQueryKey(query, platform);
-        var db = _multiplexer.GetDatabase();
-        return db.StringSetAsync(key, playlistId, TimeSpan.FromDays(7));
-    }
-
-    public async Task<string?> GetPlaylistIdByQueryAsync(string query, MusicPlatform platform)
-    {
-        query = Uri.EscapeDataString(query.Trim());
-        var key = CreateCachedPlaylistQueryKey(query, platform);
-
-        var val = await _multiplexer.GetDatabase().StringGetAsync(key);
-        if (val == default)
-            return null;
-
-        return val;
-    }
-}

src/NadekoBot/Modules/Music/_Common/Impl/TrackCacher.cs

@@ -0,0 +1,95 @@
+namespace NadekoBot.Modules.Music;
+
+public sealed class TrackCacher : ITrackCacher
+{
+    private readonly IBotCache _cache;
+
+    public TrackCacher(IBotCache cache)
+        => _cache = cache;
+
+
+    private TypedKey<string> GetStreamLinkKey(MusicPlatform platform, string id)
+        => new($"music:stream:{platform}:{id}");
+    
+    public async Task<string?> GetOrCreateStreamLink(
+        string id,
+        MusicPlatform platform,
+        Func<Task<(string StreamUrl, TimeSpan Expiry)>> streamUrlFactory)
+    {
+        var key = GetStreamLinkKey(platform, id);
+
+        var streamUrl = await _cache.GetOrDefaultAsync(key);
+        await _cache.RemoveAsync(key);
+        
+        if (streamUrl == default)
+        {
+            (streamUrl, _) = await streamUrlFactory();
+        }
+
+        // make a new one for later use
+        _ = Task.Run(async () =>
+        {
+            (streamUrl, var expiry) = await streamUrlFactory();
+            await CacheStreamUrlAsync(id, platform, streamUrl, expiry);
+        });
+        
+        return streamUrl;
+    }
+
+    public async Task CacheStreamUrlAsync(
+        string id,
+        MusicPlatform platform,
+        string url,
+        TimeSpan expiry)
+        => await _cache.AddAsync(GetStreamLinkKey(platform, id), url, expiry);
+
+    // track data by id
+    private TypedKey<ICachableTrackData> GetTrackDataKey(MusicPlatform platform, string id)
+        => new($"music:track:{platform}:{id}");
+    public async Task CacheTrackDataAsync(ICachableTrackData data)
+        => await _cache.AddAsync(GetTrackDataKey(data.Platform, data.Id), data);
+    
+    public async Task<ICachableTrackData?> GetCachedDataByIdAsync(string id, MusicPlatform platform)
+        => await _cache.GetOrDefaultAsync(GetTrackDataKey(platform, id)); 
+    
+    
+    // track data by query
+    private TypedKey<ICachableTrackData> GetTrackDataQueryKey(MusicPlatform platform, string query)
+        => new($"music:track:{platform}:q:{query}");
+
+    public async Task CacheTrackDataByQueryAsync(string query, ICachableTrackData data)
+        => await Task.WhenAll(
+            _cache.AddAsync(GetTrackDataQueryKey(data.Platform, query), data).AsTask(),
+            _cache.AddAsync(GetTrackDataKey(data.Platform, data.Id), data).AsTask());
+    
+    public async Task<ICachableTrackData?> GetCachedDataByQueryAsync(string query, MusicPlatform platform)
+        => await _cache.GetOrDefaultAsync(GetTrackDataQueryKey(platform, query));
+
+
+    // playlist track ids by playlist id
+    private TypedKey<IReadOnlyCollection<string>> GetPlaylistTracksCacheKey(string playlist, MusicPlatform platform)
+        => new($"music:playlist_tracks:{platform}:{playlist}");
+
+    public async Task CachePlaylistTrackIdsAsync(string playlistId, MusicPlatform platform, IEnumerable<string> ids)
+        => await _cache.AddAsync(GetPlaylistTracksCacheKey(playlistId, platform), ids.ToList());
+
+    public async Task<IReadOnlyCollection<string>> GetPlaylistTrackIdsAsync(string playlistId, MusicPlatform platform)
+    {
+        var result = await _cache.GetAsync(GetPlaylistTracksCacheKey(playlistId, platform));
+        if (result.TryGetValue(out var val))
+            return val;
+
+        return Array.Empty<string>();
+    }
+
+
+    // playlist id by query
+    private TypedKey<string> GetPlaylistCacheKey(string query, MusicPlatform platform)
+        => new($"music:playlist_id:{platform}:{query}");
+    
+    public async Task CachePlaylistIdByQueryAsync(string query, MusicPlatform platform, string playlistId)
+        => await _cache.AddAsync(GetPlaylistCacheKey(query, platform), playlistId);
+
+    public async Task<string?> GetPlaylistIdByQueryAsync(string query, MusicPlatform platform)
+        => await _cache.GetOrDefaultAsync(GetPlaylistCacheKey(query, platform));
+}

src/NadekoBot/Modules/Searches/Anime/AnimeResult.cs

@@ -1,34 +1,38 @@
 #nullable disable
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace NadekoBot.Modules.Searches.Common;
 
 public class AnimeResult
 {
+    [JsonPropertyName("id")]
     public int Id { get; set; }
 
+    [JsonPropertyName("airing_status")]
+    public string AiringStatusParsed { get; set; }
+
+    [JsonPropertyName("title_english")]
+    public string TitleEnglish { get; set; }
+
+    [JsonPropertyName("total_episodes")]
+    public int TotalEpisodes { get; set; }
+    
+    [JsonPropertyName("description")]
+    public string Description { get; set; }
+
+    [JsonPropertyName("image_url_lge")]
+    public string ImageUrlLarge { get; set; }
+
+    [JsonPropertyName("genres")]
+    public string[] Genres { get; set; }
+
+    [JsonPropertyName("average_score")]
+    public float AverageScore { get; set; }
+
+    
     public string AiringStatus
         => AiringStatusParsed.ToTitleCase();
     
-    [JsonProperty("airing_status")]
-    public string AiringStatusParsed { get; set; }
-
-    [JsonProperty("title_english")]
-    public string TitleEnglish { get; set; }
-
-    [JsonProperty("total_episodes")]
-    public int TotalEpisodes { get; set; }
-
-    public string Description { get; set; }
-
-    [JsonProperty("image_url_lge")]
-    public string ImageUrlLarge { get; set; }
-
-    public string[] Genres { get; set; }
-
-    [JsonProperty("average_score")]
-    public string AverageScore { get; set; }
-
     public string Link
         => "http://anilist.co/anime/" + Id;
 

src/NadekoBot/Modules/Searches/Anime/AnimeSearchService.cs

@@ -1,17 +1,15 @@
 #nullable disable
-using AngleSharp;
-using AngleSharp.Html.Dom;
 using NadekoBot.Modules.Searches.Common;
-using Newtonsoft.Json;
+using System.Net.Http.Json;
 
 namespace NadekoBot.Modules.Searches.Services;
 
 public class AnimeSearchService : INService
 {
-    private readonly IDataCache _cache;
+    private readonly IBotCache _cache;
     private readonly IHttpClientFactory _httpFactory;
 
-    public AnimeSearchService(IDataCache cache, IHttpClientFactory httpFactory)
+    public AnimeSearchService(IBotCache cache, IHttpClientFactory httpFactory)
     {
         _cache = cache;
         _httpFactory = httpFactory;
@@ -21,24 +19,25 @@ public class AnimeSearchService : INService
     {
         if (string.IsNullOrWhiteSpace(query))
             throw new ArgumentNullException(nameof(query));
+        
+        TypedKey<AnimeResult> GetKey(string link)
+            => new TypedKey<AnimeResult>($"anime2:{link}");
+        
         try
         {
-            var link = "https://aniapi.nadeko.bot/anime/"
+            var suffix = Uri.EscapeDataString(query.Replace("/", " ", StringComparison.InvariantCulture));
-                       + Uri.EscapeDataString(query.Replace("/", " ", StringComparison.InvariantCulture));
+            var link = $"https://aniapi.nadeko.bot/anime/{suffix}";
             link = link.ToLowerInvariant();
-            var (ok, data) = await _cache.TryGetAnimeDataAsync(link);
+            var result = await _cache.GetAsync(GetKey(link));
-            if (!ok)
+            if (!result.TryPickT0(out var data, out _))
             {
-                using (var http = _httpFactory.CreateClient())
+                using var http = _httpFactory.CreateClient();
-                {
+                data = await http.GetFromJsonAsync<AnimeResult>(link);
-                    data = await http.GetStringAsync(link);
+
+                await _cache.AddAsync(GetKey(link), data, expiry: TimeSpan.FromHours(12));
             }
 
-                await _cache.SetAnimeDataAsync(link, data);
+            return data;
-            }
-
-
-            return JsonConvert.DeserializeObject<AnimeResult>(data);
         }
         catch
         {
@@ -46,95 +45,31 @@ public class AnimeSearchService : INService
         }
     }
 
-    public async Task<NovelResult> GetNovelData(string query)
-    {
-        if (string.IsNullOrWhiteSpace(query))
-            throw new ArgumentNullException(nameof(query));
-
-        query = query.Replace(" ", "-", StringComparison.InvariantCulture);
-        try
-        {
-            var link = "https://www.novelupdates.com/series/"
-                       + Uri.EscapeDataString(query.Replace(" ", "-").Replace("/", " "));
-            link = link.ToLowerInvariant();
-            var (ok, data) = await _cache.TryGetNovelDataAsync(link);
-            if (!ok)
-            {
-                var config = Configuration.Default.WithDefaultLoader();
-                using var document = await BrowsingContext.New(config).OpenAsync(link);
-                var imageElem = document.QuerySelector("div.seriesimg > img");
-                if (imageElem is null)
-                    return null;
-                var imageUrl = ((IHtmlImageElement)imageElem).Source;
-
-                var descElem = document.QuerySelector("div#editdescription > p");
-                var desc = descElem.InnerHtml;
-
-                var genres = document.QuerySelector("div#seriesgenre")
-                                     .Children.Select(x => x as IHtmlAnchorElement)
-                                     .Where(x => x is not null)
-                                     .Select(x => $"[{x.InnerHtml}]({x.Href})")
-                                     .ToArray();
-
-                var authors = document.QuerySelector("div#showauthors")
-                                      .Children.Select(x => x as IHtmlAnchorElement)
-                                      .Where(x => x is not null)
-                                      .Select(x => $"[{x.InnerHtml}]({x.Href})")
-                                      .ToArray();
-
-                var score = ((IHtmlSpanElement)document.QuerySelector("h5.seriesother > span.uvotes")).InnerHtml;
-
-                var status = document.QuerySelector("div#editstatus").InnerHtml;
-                var title = document.QuerySelector("div.w-blog-content > div.seriestitlenu").InnerHtml;
-
-                var obj = new NovelResult
-                {
-                    Description = desc,
-                    Authors = authors,
-                    Genres = genres,
-                    ImageUrl = imageUrl,
-                    Link = link,
-                    Score = score,
-                    Status = status,
-                    Title = title
-                };
-
-                await _cache.SetNovelDataAsync(link, JsonConvert.SerializeObject(obj));
-
-                return obj;
-            }
-
-            return JsonConvert.DeserializeObject<NovelResult>(data);
-        }
-        catch (Exception ex)
-        {
-            Log.Error(ex, "Error getting novel data");
-            return null;
-        }
-    }
-
     public async Task<MangaResult> GetMangaData(string query)
     {
         if (string.IsNullOrWhiteSpace(query))
             throw new ArgumentNullException(nameof(query));
+        
+        TypedKey<MangaResult> GetKey(string link)
+            => new TypedKey<MangaResult>($"manga2:{link}");
+        
         try
         {
             var link = "https://aniapi.nadeko.bot/manga/"
                        + Uri.EscapeDataString(query.Replace("/", " ", StringComparison.InvariantCulture));
             link = link.ToLowerInvariant();
-            var (ok, data) = await _cache.TryGetAnimeDataAsync(link);
-            if (!ok)
-            {
-                using (var http = _httpFactory.CreateClient())
-                {
-                    data = await http.GetStringAsync(link);
-                }
             
-                await _cache.SetAnimeDataAsync(link, data);
+            var result = await _cache.GetAsync(GetKey(link));
+            if (!result.TryPickT0(out var data, out _))
+            {
+                using var http = _httpFactory.CreateClient();
+                data = await http.GetFromJsonAsync<MangaResult>(link);
+
+                await _cache.AddAsync(GetKey(link), data, expiry: TimeSpan.FromHours(3));
             }
 
 
-            return JsonConvert.DeserializeObject<MangaResult>(data);
+            return data;
         }
         catch
         {

src/NadekoBot/Modules/Searches/Anime/MangaResult.cs

@@ -1,32 +1,36 @@
 #nullable disable
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 
 namespace NadekoBot.Modules.Searches.Common;
 
 public class MangaResult
 {
+    [JsonPropertyName("id")]
     public int Id { get; set; }
 
-    [JsonProperty("publishing_status")]
+    [JsonPropertyName("publishing_status")]
     public string PublishingStatus { get; set; }
 
-    [JsonProperty("image_url_lge")]
+    [JsonPropertyName("image_url_lge")]
     public string ImageUrlLge { get; set; }
 
-    [JsonProperty("title_english")]
+    [JsonPropertyName("title_english")]
     public string TitleEnglish { get; set; }
 
-    [JsonProperty("total_chapters")]
+    [JsonPropertyName("total_chapters")]
     public int TotalChapters { get; set; }
 
-    [JsonProperty("total_volumes")]
+    [JsonPropertyName("total_volumes")]
     public int TotalVolumes { get; set; }
 
+    [JsonPropertyName("description")]
     public string Description { get; set; }
+    
+    [JsonPropertyName("genres")]
     public string[] Genres { get; set; }
 
-    [JsonProperty("average_score")]
+    [JsonPropertyName("average_score")]
-    public string AverageScore { get; set; }
+    public float AverageScore { get; set; }
 
     public string Link
         => "http://anilist.co/manga/" + Id;

src/NadekoBot/Modules/Searches/Crypto/CryptoService.cs

@@ -15,13 +15,13 @@ namespace NadekoBot.Modules.Searches.Services;
 
 public class CryptoService : INService
 {
-    private readonly IDataCache _cache;
+    private readonly IBotCache _cache;
     private readonly IHttpClientFactory _httpFactory;
     private readonly IBotCredentials _creds;
 
     private readonly SemaphoreSlim _getCryptoLock = new(1, 1);
 
-    public CryptoService(IDataCache cache, IHttpClientFactory httpFactory, IBotCredentials creds)
+    public CryptoService(IBotCache cache, IHttpClientFactory httpFactory, IBotCredentials creds)
     {
         _cache = cache;
         _httpFactory = httpFactory;
@@ -40,7 +40,8 @@ public class CryptoService : INService
         Span<PointF> points = new PointF[gElement.ChildNodes.Count];
         var cnt = 0;
 
-        bool GetValuesFromAttributes(XmlAttributeCollection attrs,
+        bool GetValuesFromAttributes(
+            XmlAttributeCollection attrs,
             out float x1,
             out float y1,
             out float x2,
@@ -130,20 +131,20 @@ public class CryptoService : INService
         await _getCryptoLock.WaitAsync();
         try
         {
-            var fullStrData = await _cache.GetOrAddCachedDataAsync("nadeko:crypto_data",
+            var data = await _cache.GetOrAddAsync(new("nadeko:crypto_data"),
-                async _ =>
+                async () =>
                 {
                     try
                     {
                         using var http = _httpFactory.CreateClient();
-                        var strData = await http.GetFromJsonAsync<CryptoResponse>(
+                        var data = await http.GetFromJsonAsync<CryptoResponse>(
                             "https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest?"
                             + $"CMC_PRO_API_KEY={_creds.CoinmarketcapApiKey}"
                             + "&start=1"
                             + "&limit=5000"
                             + "&convert=USD");
 
-                        return JsonSerializer.Serialize(strData);
+                        return data;
                     }
                     catch (Exception ex)
                     {
@@ -151,13 +152,12 @@ public class CryptoService : INService
                         return default;
                     }
                 },
-                "",
                 TimeSpan.FromHours(2));
 
-            if (fullStrData is null)
+            if (data is null)
                 return default;
 
-            return JsonSerializer.Deserialize<CryptoResponse>(fullStrData)?.Data ?? new();
+            return data.Data;
         }
         catch (Exception ex)
         {
@@ -170,42 +170,31 @@ public class CryptoService : INService
         }
     }
 
+    private TypedKey<byte[]> GetSparklineKey(int id)
+        => new($"crypto:sparkline:{id}");
+
     public async Task<Stream?> GetSparklineAsync(int id, bool up)
     {
-        var key = $"crypto:sparkline:{id}";
+        try
+        {
+            var bytes = await _cache.GetOrAddAsync(GetSparklineKey(id),
+                async () =>
+                {
+                    // if it fails, generate a new one
+                    var points = await DownloadSparklinePointsAsync(id);
+                    var sparkline = GenerateSparklineChart(points, up);
+
+                    using var stream = await sparkline.ToStreamAsync();
+                    return stream.ToArray();
+                },
+                TimeSpan.FromHours(1));
 
-        // attempt to get from cache
-        var db = _cache.Redis.GetDatabase();
-        byte[] bytes = await db.StringGetAsync(key);
-        // if it succeeds, return it
             if (bytes is { Length: > 0 })
             {
                 return bytes.ToStream();
             }
 
-        // if it fails, generate a new one
-        var points = await DownloadSparklinePointsAsync(id);
-        if (points is null)
             return default;
-        
-        var sparkline = GenerateSparklineChart(points, up);
-
-        // add to cache for 1h and return it
-        
-        var stream = sparkline.ToStream();
-        await db.StringSetAsync(key, stream.ToArray(), expiry: TimeSpan.FromHours(1));
-        return stream;
-    }
-
-    private async Task<PointF[]?> DownloadSparklinePointsAsync(int id)
-    {
-        try
-        {
-            using var http = _httpFactory.CreateClient();
-            var str = await http.GetStringAsync(
-                $"https://s3.coinmarketcap.com/generated/sparklines/web/7d/usd/{id}.svg");
-            var points = GetSparklinePointsFromSvgText(str);
-            return points;
         }
         catch (Exception ex)
         {
@@ -215,4 +204,13 @@ public class CryptoService : INService
             return default;
         }
     }
+
+    private async Task<PointF[]> DownloadSparklinePointsAsync(int id)
+    {
+        using var http = _httpFactory.CreateClient();
+        var str = await http.GetStringAsync(
+            $"https://s3.coinmarketcap.com/generated/sparklines/web/7d/usd/{id}.svg");
+        var points = GetSparklinePointsFromSvgText(str);
+        return points;
+    }
 }

src/NadekoBot/Modules/Searches/PokemonSearchCommands.cs

@@ -9,15 +9,9 @@ public partial class Searches
     [Group]
     public partial class PokemonSearchCommands : NadekoModule<SearchesService>
     {
-        public IReadOnlyDictionary<string, SearchPokemon> Pokemons
+        private readonly ILocalDataCache _cache;
-            => _cache.LocalData.Pokemons;
 
-        public IReadOnlyDictionary<string, SearchPokemonAbility> PokemonAbilities
+        public PokemonSearchCommands(ILocalDataCache cache)
-            => _cache.LocalData.PokemonAbilities;
-
-        private readonly IDataCache _cache;
-
-        public PokemonSearchCommands(IDataCache cache)
             => _cache = cache;
 
         [Cmd]
@@ -27,7 +21,7 @@ public partial class Searches
             if (string.IsNullOrWhiteSpace(pokemon))
                 return;
 
-            foreach (var kvp in Pokemons)
+            foreach (var kvp in await _cache.GetPokemonsAsync())
             {
                 if (kvp.Key.ToUpperInvariant() == pokemon.ToUpperInvariant())
                 {
@@ -58,7 +52,7 @@ public partial class Searches
             ability = ability?.Trim().ToUpperInvariant().Replace(" ", "", StringComparison.InvariantCulture);
             if (string.IsNullOrWhiteSpace(ability))
                 return;
-            foreach (var kvp in PokemonAbilities)
+            foreach (var kvp in await _cache.GetPokemonAbilitiesAsync())
             {
                 if (kvp.Key.ToUpperInvariant() == ability)
                 {

src/NadekoBot/Modules/Searches/Search/SearchCommands.cs

@@ -10,14 +10,14 @@ public partial class Searches
     public partial class SearchCommands : NadekoModule
     {
         private readonly ISearchServiceFactory _searchFactory;
-        private readonly ConnectionMultiplexer _redis;
+        private readonly IBotCache _cache;
 
         public SearchCommands(
             ISearchServiceFactory searchFactory,
-            ConnectionMultiplexer redis)
+            IBotCache cache)
         {
             _searchFactory = searchFactory;
-            _redis = redis;
+            _cache = cache;
         }
 
         [Cmd]
@@ -127,18 +127,17 @@ public partial class Searches
             await ctx.Channel.EmbedAsync(null, embeds: embeds);
         }
 
+        private TypedKey<string> GetYtCacheKey(string query)
+            => new($"search:youtube:{query}");
+        
         private async Task AddYoutubeUrlToCacheAsync(string query, string url)
-        {
+            => await _cache.AddAsync(GetYtCacheKey(query), url, expiry: 1.Hours());
-            var db = _redis.GetDatabase();
-            await db.StringSetAsync($"search:youtube:{query}", url, expiry: 1.Hours());
-        }
 
         private async Task<VideoInfo?> GetYoutubeUrlFromCacheAsync(string query)
         {
-            var db = _redis.GetDatabase();
+            var result = await _cache.GetAsync(GetYtCacheKey(query));
-            var url = await db.StringGetAsync($"search:youtube:{query}");
 
-            if (string.IsNullOrWhiteSpace(url))
+            if (!result.TryGetValue(out var url) || string.IsNullOrWhiteSpace(url))
                 return null;
 
             return new VideoInfo()

src/NadekoBot/Modules/Searches/SearchesService.cs

@@ -1,6 +1,4 @@
 #nullable disable
-using AngleSharp.Html.Dom;
-using AngleSharp.Html.Parser;
 using Html2Markdown;
 using NadekoBot.Modules.Searches.Common;
 using Newtonsoft.Json;
@@ -10,7 +8,6 @@ using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.Drawing.Processing;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using System.Net;
 using Color = SixLabors.ImageSharp.Color;
 using Image = SixLabors.ImageSharp.Image;
 
@@ -31,9 +28,9 @@ public class SearchesService : INService
     private readonly IHttpClientFactory _httpFactory;
     private readonly IGoogleApiService _google;
     private readonly IImageCache _imgs;
-    private readonly IDataCache _cache;
+    private readonly IBotCache _c;
     private readonly FontProvider _fonts;
-    private readonly IBotCredentials _creds;
+    private readonly IBotCredsProvider _creds;
     private readonly NadekoRandom _rng;
     private readonly List<string> _yomamaJokes;
 
@@ -42,15 +39,16 @@ public class SearchesService : INService
 
     public SearchesService(
         IGoogleApiService google,
-        IDataCache cache,
+        IImageCache images,
+        IBotCache c,
         IHttpClientFactory factory,
         FontProvider fonts,
-        IBotCredentials creds)
+        IBotCredsProvider creds)
     {
         _httpFactory = factory;
         _google = google;
-        _imgs = cache.LocalImages;
+        _imgs = images;
-        _cache = cache;
+        _c = c;
         _fonts = fonts;
         _creds = creds;
         _rng = new();
@@ -76,36 +74,28 @@ public class SearchesService : INService
     }
 
     public async Task<Stream> GetRipPictureAsync(string text, Uri imgUrl)
-    {
+        => (await GetRipPictureFactory(text, imgUrl)).ToStream();
-        var data = await _cache.GetOrAddCachedDataAsync($"nadeko_rip_{text}_{imgUrl}",
-            GetRipPictureFactory,
-            (text, imgUrl),
-            TimeSpan.FromDays(1));
-
-        return data.ToStream();
-    }
 
     private void DrawAvatar(Image bg, Image avatarImage)
         => bg.Mutate(x => x.Grayscale().DrawImage(avatarImage, new(83, 139), new GraphicsOptions()));
 
-    public async Task<byte[]> GetRipPictureFactory((string text, Uri avatarUrl) arg)
+    public async Task<byte[]> GetRipPictureFactory(string text, Uri avatarUrl)
     {
-        var (text, avatarUrl) = arg;
+        using var bg = Image.Load<Rgba32>(await _imgs.GetRipBgAsync());
-        using var bg = Image.Load<Rgba32>(_imgs.Rip.ToArray());
+        var result = await _c.GetImageDataAsync(avatarUrl);
-        var (succ, data) = (false, (byte[])null); //await _cache.TryGetImageDataAsync(avatarUrl);
+        if (!result.TryPickT0(out var data, out _))
-        if (!succ)
         {
             using var http = _httpFactory.CreateClient();
             data = await http.GetByteArrayAsync(avatarUrl);
             using (var avatarImg = Image.Load<Rgba32>(data))
             {
                 avatarImg.Mutate(x => x.Resize(85, 85).ApplyRoundedCorners(42));
-                await using var avStream = avatarImg.ToStream();
+                await using var avStream = await avatarImg.ToStreamAsync();
                 data = avStream.ToArray();
                 DrawAvatar(bg, avatarImg);
             }
 
-            await _cache.SetImageDataAsync(avatarUrl, data);
+            await _c.SetImageDataAsync(avatarUrl, data);
         }
         else
         {
@@ -128,7 +118,7 @@ public class SearchesService : INService
             new(25, 225)));
 
         //flowa
-        using (var flowers = Image.Load(_imgs.RipOverlay.ToArray()))
+        using (var flowers = Image.Load(await _imgs.GetRipOverlayAsync()))
         {
             bg.Mutate(x => x.DrawImage(flowers, new(0, 0), new GraphicsOptions()));
         }
@@ -137,13 +127,12 @@ public class SearchesService : INService
         return stream.ToArray();
     }
 
-    public Task<WeatherData> GetWeatherDataAsync(string query)
+    public async Task<WeatherData> GetWeatherDataAsync(string query)
     {
         query = query.Trim().ToLowerInvariant();
 
-        return _cache.GetOrAddCachedDataAsync($"nadeko_weather_{query}",
+        return await _c.GetOrAddAsync(new($"nadeko_weather_{query}"),
-            GetWeatherDataFactory,
+            async () => await GetWeatherDataFactory(query),
-            query,
             TimeSpan.FromHours(3));
     }
 
@@ -184,26 +173,28 @@ public class SearchesService : INService
         if (string.IsNullOrEmpty(query))
             return (default, TimeErrors.InvalidInput);
 
-        if (string.IsNullOrWhiteSpace(_creds.LocationIqApiKey) || string.IsNullOrWhiteSpace(_creds.TimezoneDbApiKey))
+
+        var locIqKey = _creds.GetCreds().LocationIqApiKey;
+        var tzDbKey = _creds.GetCreds().TimezoneDbApiKey;
+        if (string.IsNullOrWhiteSpace(locIqKey) || string.IsNullOrWhiteSpace(tzDbKey))
             return (default, TimeErrors.ApiKeyMissing);
 
         try
         {
             using var http = _httpFactory.CreateClient();
-            var res = await _cache.GetOrAddCachedDataAsync($"geo_{query}",
+            var res = await _c.GetOrAddAsync(new($"searches:geo:{query}"),
-                _ =>
+                async () =>
                 {
                     var url = "https://eu1.locationiq.com/v1/search.php?"
-                              + (string.IsNullOrWhiteSpace(_creds.LocationIqApiKey)
+                              + (string.IsNullOrWhiteSpace(locIqKey)
                                   ? "key="
-                                  : $"key={_creds.LocationIqApiKey}&")
+                                  : $"key={locIqKey}&")
                               + $"q={Uri.EscapeDataString(query)}&"
                               + "format=json";
 
-                    var res = http.GetStringAsync(url);
+                    var res = await http.GetStringAsync(url);
                     return res;
                 },
-                "",
                 TimeSpan.FromHours(1));
 
             var responses = JsonConvert.DeserializeObject<LocationIqResponse[]>(res);
@@ -217,7 +208,7 @@ public class SearchesService : INService
 
             using var req = new HttpRequestMessage(HttpMethod.Get,
                 "http://api.timezonedb.com/v2.1/get-time-zone?"
-                + $"key={_creds.TimezoneDbApiKey}"
+                + $"key={tzDbKey}"
                 + $"&format=json"
                 + $"&by=position"
                 + $"&lat={geoData.Lat}"
@@ -315,9 +306,8 @@ public class SearchesService : INService
     public async Task<MtgData> GetMtgCardAsync(string search)
     {
         search = search.Trim().ToLowerInvariant();
-        var data = await _cache.GetOrAddCachedDataAsync($"nadeko_mtg_{search}",
+        var data = await _c.GetOrAddAsync(new($"mtg:{search}"),
-            GetMtgCardFactory,
+            async () => await GetMtgCardFactory(search),
-            search,
             TimeSpan.FromDays(1));
 
         if (data is null || data.Length == 0)
@@ -368,12 +358,11 @@ public class SearchesService : INService
         return await cards.Select(GetMtgDataAsync).WhenAll();
     }
 
-    public Task<HearthstoneCardData> GetHearthstoneCardDataAsync(string name)
+    public async Task<HearthstoneCardData> GetHearthstoneCardDataAsync(string name)
     {
         name = name.ToLowerInvariant();
-        return _cache.GetOrAddCachedDataAsync($"nadeko_hearthstone_{name}",
+        return await _c.GetOrAddAsync($"hearthstone:{name}",
-            HearthstoneCardDataFactory,
+            () => HearthstoneCardDataFactory(name),
-            name,
             TimeSpan.FromDays(1));
     }
 
@@ -381,7 +370,7 @@ public class SearchesService : INService
     {
         using var http = _httpFactory.CreateClient();
         http.DefaultRequestHeaders.Clear();
-        http.DefaultRequestHeaders.Add("x-rapidapi-key", _creds.RapidApiKey);
+        http.DefaultRequestHeaders.Add("x-rapidapi-key", _creds.GetCreds().RapidApiKey);
         try
         {
             var response = await http.GetStringAsync("https://omgvamp-hearthstone-v1.p.rapidapi.com/"
@@ -410,16 +399,22 @@ public class SearchesService : INService
         }
     }
 
-    public Task<OmdbMovie> GetMovieDataAsync(string name)
+    public async Task<OmdbMovie> GetMovieDataAsync(string name)
     {
         name = name.Trim().ToLowerInvariant();
-        return _cache.GetOrAddCachedDataAsync($"nadeko_movie_{name}", GetMovieDataFactory, name, TimeSpan.FromDays(1));
+        return await _c.GetOrAddAsync(new($"movie:{name}"),
+            () => GetMovieDataFactory(name),
+            TimeSpan.FromDays(1));
     }
 
     private async Task<OmdbMovie> GetMovieDataFactory(string name)
     {
         using var http = _httpFactory.CreateClient();
-        var res = await http.GetStringAsync(string.Format("https://omdbapi.nadeko.bot/?t={0}&y=&plot=full&r=json",
+        var res = await http.GetStringAsync(string.Format("https://omdbapi.nadeko.bot/"
+                                                          + "?t={0}"
+                                                          + "&y="
+                                                          + "&plot=full"
+                                                          + "&r=json",
             name.Trim().Replace(' ', '+')));
         var movie = JsonConvert.DeserializeObject<OmdbMovie>(res);
         if (movie?.Title is null)
@@ -432,10 +427,11 @@ public class SearchesService : INService
     {
         const string steamGameIdsKey = "steam_names_to_appid";
 
-        var gamesMap = await _cache.GetOrAddCachedDataAsync(steamGameIdsKey,
+        var gamesMap = await _c.GetOrAddAsync(new(steamGameIdsKey),
-            async _ =>
+            async () =>
             {
                 using var http = _httpFactory.CreateClient();
+                
                 // https://api.steampowered.com/ISteamApps/GetAppList/v2/
                 var gamesStr = await http.GetStringAsync("https://api.steampowered.com/ISteamApps/GetAppList/v2/");
                 var apps = JsonConvert
@@ -446,23 +442,18 @@ public class SearchesService : INService
                                    {
                                        apps = new List<SteamGameId>()
                                    }
-                               })
+                               })!
                            .applist.apps;
 
                 return apps.OrderBy(x => x.Name, StringComparer.OrdinalIgnoreCase)
                            .GroupBy(x => x.Name)
                            .ToDictionary(x => x.Key, x => x.First().AppId);
-                //await db.HashSetAsync("steam_game_ids", apps.Select(app => new HashEntry(app.Name.Trim().ToLowerInvariant(), app.AppId)).ToArray());
-                //await db.StringSetAsync("steam_game_ids", gamesStr, TimeSpan.FromHours(24));
-                //await db.KeyExpireAsync("steam_game_ids", TimeSpan.FromHours(24), CommandFlags.FireAndForget);
             },
-            default(string),
             TimeSpan.FromHours(24));
 
         if (gamesMap is null)
             return -1;
         
-
         query = query.Trim();
 
         var keyList = gamesMap.Keys.ToList();

src/NadekoBot/Modules/Searches/StreamNotification/StreamNotificationService.cs

@@ -1,4 +1,6 @@
 #nullable disable
+using LinqToDB;
+using LinqToDB.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore;
 using NadekoBot.Common.ModuleBehaviors;
 using NadekoBot.Db;
@@ -6,10 +8,98 @@ using NadekoBot.Db.Models;
 using NadekoBot.Modules.Searches.Common;
 using NadekoBot.Modules.Searches.Common.StreamNotifications;
 using NadekoBot.Services.Database.Models;
-using StackExchange.Redis;
 
 namespace NadekoBot.Modules.Searches.Services;
 
+public sealed class StreamOnlineMessageDeleterService : INService, IReadyExecutor
+{
+    private readonly StreamNotificationService _notifService;
+    private readonly DbService _db;
+    private readonly DiscordSocketClient _client;
+    private readonly IPubSub _pubSub;
+
+    public StreamOnlineMessageDeleterService(
+        StreamNotificationService notifService,
+        DbService db,
+        IPubSub pubSub,
+        DiscordSocketClient client)
+    {
+        _notifService = notifService;
+        _db = db;
+        _client = client;
+        _pubSub = pubSub;
+    }
+
+    public async Task OnReadyAsync()
+    {
+        _notifService.OnlineMessagesSent += OnOnlineMessagesSent;
+        
+        if(_client.ShardId == 0)
+            await _pubSub.Sub(_notifService.StreamsOfflineKey, OnStreamsOffline);
+    }
+
+    private async Task OnOnlineMessagesSent(FollowedStream.FType type, string name, IReadOnlyCollection<(ulong, ulong)> pairs)
+    {
+        await using var ctx = _db.GetDbContext();
+        foreach (var (channelId, messageId) in pairs)
+        {
+            await ctx.GetTable<StreamOnlineMessage>()
+                     .InsertAsync(() => new()
+                     {
+                         Name = name,
+                         Type = type,
+                         MessageId = messageId,
+                         ChannelId = channelId,
+                         DateAdded = DateTime.UtcNow,
+                     });
+        }
+    }
+
+    private async ValueTask OnStreamsOffline(List<StreamData> streamDatas)
+    {
+        if (_client.ShardId != 0)
+            return;
+
+        var pairs = await GetMessagesToDelete(streamDatas);
+
+        foreach (var (channelId, messageId) in pairs)
+        {
+            try
+            {
+                var textChannel = await _client.GetChannelAsync(channelId) as ITextChannel;
+                if (textChannel is null)
+                    continue;
+
+                await textChannel.DeleteMessageAsync(messageId);
+            }
+            catch
+            {
+                continue;
+            }
+        }
+    }
+
+    private async Task<IEnumerable<(ulong, ulong)>> GetMessagesToDelete(List<StreamData> streamDatas)
+    {
+        await using var ctx = _db.GetDbContext();
+
+        var toReturn = new List<(ulong, ulong)>();
+        foreach (var sd in streamDatas)
+        {
+            var key = sd.CreateKey();
+            var toDelete = await ctx.GetTable<StreamOnlineMessage>()
+                                    .Where(x => (x.Type == key.Type && x.Name == key.Name)
+                                                || Sql.DateDiff(Sql.DateParts.Day, x.DateAdded, DateTime.UtcNow) > 1)
+                                    .DeleteWithOutputAsync();
+            
+            toReturn.AddRange(toDelete.Select(x => (x.ChannelId, x.MessageId)));
+        }
+
+        return toReturn;
+    }
+}
+
+
 public sealed class StreamNotificationService : INService, IReadyExecutor
 {
     private readonly DbService _db;
@@ -29,18 +119,22 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
     private readonly IPubSub _pubSub;
     private readonly IEmbedBuilderService _eb;
 
-    private readonly TypedKey<List<StreamData>> _streamsOnlineKey;
+    public TypedKey<List<StreamData>> StreamsOnlineKey { get; }
-    private readonly TypedKey<List<StreamData>> _streamsOfflineKey;
+    public TypedKey<List<StreamData>> StreamsOfflineKey { get; }
 
     private readonly TypedKey<FollowStreamPubData> _streamFollowKey;
     private readonly TypedKey<FollowStreamPubData> _streamUnfollowKey;
-    private readonly ConnectionMultiplexer _redis;
+
+    public event Func<
+        FollowedStream.FType,
+        string,
+        IReadOnlyCollection<(ulong, ulong)>,
+        Task> OnlineMessagesSent = static delegate { return Task.CompletedTask; };
 
     public StreamNotificationService(
         DbService db,
         DiscordSocketClient client,
         IBotStrings strings,
-        ConnectionMultiplexer redis,
         IBotCredsProvider creds,
         IHttpClientFactory httpFactory,
         Bot bot,
@@ -52,11 +146,11 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
         _strings = strings;
         _pubSub = pubSub;
         _eb = eb;
-        _redis = redis;
-        _streamTracker = new(httpFactory, creds, redis, creds.GetCreds().RedisKey(), client.ShardId == 0);
         
-        _streamsOnlineKey = new("streams.online");
+        _streamTracker = new(httpFactory, creds);
-        _streamsOfflineKey = new("streams.offline");
+
+        StreamsOnlineKey = new("streams.online");
+        StreamsOfflineKey = new("streams.offline");
 
         _streamFollowKey = new("stream.follow");
         _streamUnfollowKey = new("stream.unfollow");
@@ -100,7 +194,7 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
                 var allFollowedStreams = uow.Set<FollowedStream>().AsQueryable().ToList();
 
                 foreach (var fs in allFollowedStreams)
-                    _streamTracker.CacheAddData(fs.CreateKey(), null, false);
+                    _streamTracker.AddLastData(fs.CreateKey(), null, false);
 
                 _trackCounter = allFollowedStreams.GroupBy(x => new
                                                   {
@@ -112,8 +206,8 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
             }
         }
 
-        _pubSub.Sub(_streamsOfflineKey, HandleStreamsOffline);
+        _pubSub.Sub(StreamsOfflineKey, HandleStreamsOffline);
-        _pubSub.Sub(_streamsOnlineKey, HandleStreamsOnline);
+        _pubSub.Sub(StreamsOnlineKey, HandleStreamsOnline);
 
         if (client.ShardId == 0)
         {
@@ -186,7 +280,7 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
     /// </summary>
     private ValueTask HandleFollowStream(FollowStreamPubData info)
     {
-        _streamTracker.CacheAddData(info.Key, null, false);
+        _streamTracker.AddLastData(info.Key, null, false);
         lock (_shardLock)
         {
             var key = info.Key;
@@ -251,45 +345,8 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
                       .WhenAll();
             }
         }
-
-        if (_client.ShardId == 0)
-        {
-            foreach (var stream in offlineStreams)
-            {
-                await DeleteOnlineMessages(stream);
-            }
-        }
     }
     
-    private async Task DeleteOnlineMessages(StreamData stream)
-    {
-        var db = _redis.GetDatabase();
-        var data = await db.ListRangeAsync($"streams_online_del:{stream.CreateKey()}");
-        await db.KeyDeleteAsync($"streams_online_del:{stream.CreateKey()}");
-        
-        foreach (string pair in data)
-        {
-            var pairArr = pair.Split(',');
-            if (pairArr.Length != 2)
-                continue;
-
-            if (!ulong.TryParse(pairArr[0], out var chId) || !ulong.TryParse(pairArr[1], out var msgId))
-                continue;
-
-            try
-            {
-                var textChannel = await _client.GetChannelAsync(chId) as ITextChannel;
-                if (textChannel is null)
-                    continue;
-
-                await textChannel.DeleteMessageAsync(msgId);
-            }
-            catch
-            {
-                continue;
-            }
-        }
-    }
 
     private async ValueTask HandleStreamsOnline(List<StreamData> onlineStreams)
     {
@@ -331,14 +388,11 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
                 {
                     var pairs = messages
                                 .Where(x => x != default)
-                                .Select(x => (RedisValue)$"{x.Item1},{x.Item2}")
+                                .Select(x => (x.Item1, x.Item2))
-                                .ToArray();
+                                .ToList();
 
-                    if (pairs.Length > 0)
+                    if (pairs.Count > 0)
-                    {
+                        await OnlineMessagesSent(key.Type, key.Name, pairs);
-                        var db = _redis.GetDatabase();
-                        await db.ListRightPushAsync($"streams_online_del:{key}", pairs);
-                    }
                 }
                 catch
                 {
@@ -349,10 +403,10 @@ public sealed class StreamNotificationService : INService, IReadyExecutor
     }
 
     private Task OnStreamsOnline(List<StreamData> data)
-        => _pubSub.Pub(_streamsOnlineKey, data);
+        => _pubSub.Pub(StreamsOnlineKey, data);
 
     private Task OnStreamsOffline(List<StreamData> data)
-        => _pubSub.Pub(_streamsOfflineKey, data);
+        => _pubSub.Pub(StreamsOfflineKey, data);
 
     private Task ClientOnJoinedGuild(GuildConfig guildConfig)
     {

src/NadekoBot/Modules/Searches/_Common/StreamNotifications/Models/StreamDataKey.cs

@@ -6,10 +6,9 @@ namespace NadekoBot.Modules.Searches.Common;
 
 public readonly struct StreamDataKey
 {
-    public FollowedStream.FType Type { get; }
+    public FollowedStream.FType Type { get; init; }
-    public string Name { get; }
+    public string Name { get; init; }
 
-    [JsonConstructor]
     public StreamDataKey(FollowedStream.FType type, string name)
     {
         Type = type;

src/NadekoBot/Modules/Searches/_Common/StreamNotifications/NotifChecker.cs

@@ -1,7 +1,5 @@
 using NadekoBot.Db.Models;
 using NadekoBot.Modules.Searches.Common.StreamNotifications.Providers;
-using Newtonsoft.Json;
-using StackExchange.Redis;
 
 namespace NadekoBot.Modules.Searches.Common.StreamNotifications;
 
@@ -9,30 +7,22 @@ public class NotifChecker
 {
     public event Func<List<StreamData>, Task> OnStreamsOffline = _ => Task.CompletedTask;
     public event Func<List<StreamData>, Task> OnStreamsOnline = _ => Task.CompletedTask;
-    private readonly ConnectionMultiplexer _multi;
-    private readonly string _key;
 
-    private readonly Dictionary<FollowedStream.FType, Provider> _streamProviders;
+    private readonly IReadOnlyDictionary<FollowedStream.FType, Provider> _streamProviders;
     private readonly HashSet<(FollowedStream.FType, string)> _offlineBuffer;
+    private readonly ConcurrentDictionary<StreamDataKey, StreamData?> _cache = new();
 
     public NotifChecker(
         IHttpClientFactory httpClientFactory,
-        IBotCredsProvider credsProvider,
+        IBotCredsProvider credsProvider)
-        ConnectionMultiplexer multi,
-        string uniqueCacheKey,
-        bool isMaster)
     {
-        _multi = multi;
+        _streamProviders = new Dictionary<FollowedStream.FType, Provider>()
-        _key = $"{uniqueCacheKey}_followed_streams_data";
-        _streamProviders = new()
         {
             { FollowedStream.FType.Twitch, new TwitchHelixProvider(httpClientFactory, credsProvider) },
             { FollowedStream.FType.Picarto, new PicartoProvider(httpClientFactory) },
             { FollowedStream.FType.Trovo, new TrovoProvider(httpClientFactory, credsProvider) }
         };
         _offlineBuffer = new();
-        if (isMaster)
-            CacheClearAllData();
     }
 
     // gets all streams which have been failing for more than the provided timespan
@@ -61,7 +51,7 @@ public class NotifChecker
             {
                 try
                 {
-                    var allStreamData = CacheGetAllData();
+                    var allStreamData = GetAllData();
 
                     var oldStreamDataDict = allStreamData
                                             // group by type
@@ -101,7 +91,7 @@ public class NotifChecker
                             || !typeDict.TryGetValue(key.Name, out var oldData)
                             || oldData is null)
                         {
-                            CacheAddData(key, newData, true);
+                            AddLastData(key, newData, true);
                             continue;
                         }
                         
@@ -109,7 +99,7 @@ public class NotifChecker
                         if (string.IsNullOrWhiteSpace(newData.Game))
                             newData.Game = oldData.Game;
                         
-                        CacheAddData(key, newData, true);
+                        AddLastData(key, newData, true);
 
                         // if the stream is offline, we need to check if it was
                         // marked as offline once previously
@@ -158,39 +148,22 @@ public class NotifChecker
             }
         });
 
-    public bool CacheAddData(StreamDataKey key, StreamData? data, bool replace)
+    public bool AddLastData(StreamDataKey key, StreamData? data, bool replace)
     {
-        var db = _multi.GetDatabase();
+        if (replace)
-        return db.HashSet(_key,
+        {
-            JsonConvert.SerializeObject(key),
+            _cache[key] = data;
-            JsonConvert.SerializeObject(data),
+            return true;
-            replace ? When.Always : When.NotExists);
         }
         
-    public void CacheDeleteData(StreamDataKey key)
+        return _cache.TryAdd(key, data);
-    {
-        var db = _multi.GetDatabase();
-        db.HashDelete(_key, JsonConvert.SerializeObject(key));
     }
 
-    public void CacheClearAllData()
+    public void DeleteLastData(StreamDataKey key)
-    {
+        => _cache.TryRemove(key, out _);
-        var db = _multi.GetDatabase();
-        db.KeyDelete(_key);
-    }
 
-    public Dictionary<StreamDataKey, StreamData?> CacheGetAllData()
+    public Dictionary<StreamDataKey, StreamData?> GetAllData()
-    {
+        => _cache.ToDictionary(x => x.Key, x => x.Value);
-        var db = _multi.GetDatabase();
-        if (!db.KeyExists(_key))
-            return new();
-
-        return db.HashGetAll(_key)
-                 .ToDictionary(entry => JsonConvert.DeserializeObject<StreamDataKey>(entry.Name),
-                     entry => entry.Value.IsNullOrEmpty
-                         ? default
-                         : JsonConvert.DeserializeObject<StreamData>(entry.Value));
-    }
 
     public async Task<StreamData?> GetStreamDataByUrlAsync(string url)
     {
@@ -234,9 +207,9 @@ public class NotifChecker
 
         // if stream is found, add it to the cache for tracking only if it doesn't already exist
         // because stream will be checked and events will fire in a loop. We don't want to override old state
-        return CacheAddData(data.CreateKey(), data, false);
+        return AddLastData(data.CreateKey(), data, false);
     }
 
     public void UntrackStreamByKey(in StreamDataKey key)
-        => CacheDeleteData(key);
+        => DeleteLastData(key);
 }

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 static readonly TypedKey<long> _quotaKey 
-    private readonly IBotCredentials _creds;
+        = new($"quota:last_hourly_reset");
-    private readonly TypedKey<bool> _quotaKey;
+
+    private readonly IBotCache _cache;
 
     public PatronageService(
         PatronageConfig pConf,
@@ -41,18 +42,14 @@ public sealed class PatronageService
         DiscordSocketClient client,
         ISubscriptionHandler subsHandler,
         IEmbedBuilderService eb,
-        ConnectionMultiplexer redis,
+        IBotCache cache)
-        IBotCredentials creds)
     {
         _pConf = pConf;
         _db = db;
         _client = client;
         _subsHandler = subsHandler;
         _eb = eb;
-        _redis = redis;
+        _cache = cache;
-        _creds = creds;
-
-        _quotaKey = new TypedKey<bool>($"{_creds.RedisKey()}:quota:last_hourly_reset");
     }
 
     public Task OnReadyAsync()
@@ -101,11 +98,10 @@ public sealed class PatronageService
                 var now = DateTime.UtcNow;
                 var lastRun = DateTime.MinValue;
 
-                var rdb = _redis.GetDatabase();
+                var result = await _cache.GetAsync(_quotaKey);
-                var lastVal = await rdb.StringGetAsync(_quotaKey.Key);
+                if (result.TryGetValue(out var lastVal) && lastVal != default)
-                if (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
+    private static readonly TypedKey<List<ConvertUnit>> _convertKey =
-        => _cache.Redis.GetDatabase().StringGet("converter_units").ToString().MapJson<ConvertUnit[]>();
+        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"))
+        var stream =  File.OpenRead("data/units.json");
-                                  ?.Where(x => x.UnitType != "currency");
+        var defaultUnits = await JsonSerializer.DeserializeAsync<ConvertUnit[]>(stream);
-        if (fileData is null)
+        if(defaultUnits is not null)
-            return;
+            units.AddRange(defaultUnits);
         
-        var data = JsonConvert.SerializeObject(range.Append(baseType).Concat(fileData).ToList());
+        units.Add(baseType);
-        _cache.Redis.GetDatabase().StringSet("converter_units", data);
+        
+        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)
             {

src/NadekoBot/Modules/Xp/XpService.cs

@@ -23,10 +23,8 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
     public const int XP_REQUIRED_LVL_1 = 36;
 
     private readonly DbService _db;
-    private readonly CommandHandler _cmd;
     private readonly IImageCache _images;
     private readonly IBotStrings _strings;
-    private readonly IDataCache _cache;
     private readonly FontProvider _fonts;
     private readonly IBotCredentials _creds;
     private readonly ICurrencyService _cs;
@@ -45,14 +43,15 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
 
     private readonly TypedKey<bool> _xpTemplateReloadKey;
     private readonly IPatronageService _ps;
+    private readonly IBotCache _c;
 
     public XpService(
         DiscordSocketClient client,
-        CommandHandler cmd,
         Bot bot,
         DbService db,
         IBotStrings strings,
-        IDataCache cache,
+        IImageCache images,
+        IBotCache c,
         FontProvider fonts,
         IBotCredentials creds,
         ICurrencyService cs,
@@ -63,10 +62,8 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
         IPatronageService ps)
     {
         _db = db;
-        _cmd = cmd;
+        _images = images;
-        _images = cache.LocalImages;
         _strings = strings;
-        _cache = cache;
         _fonts = fonts;
         _creds = creds;
         _cs = cs;
@@ -79,6 +76,7 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
         _client = client;
         _xpTemplateReloadKey = new("xp.template.reload");
         _ps = ps;
+        _c = c;
 
         InternalReloadXpTemplate();
 
@@ -453,10 +451,10 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
 
     private Task Client_OnGuildAvailable(SocketGuild guild)
     {
-        Task.Run(() =>
+        Task.Run(async () =>
         {
             foreach (var channel in guild.VoiceChannels)
-                ScanChannelForVoiceXp(channel);
+                await ScanChannelForVoiceXp(channel);
         });
 
         return Task.CompletedTask;
@@ -467,33 +465,33 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
         if (socketUser is not SocketGuildUser user || user.IsBot)
             return Task.CompletedTask;
 
-        _ = Task.Run(() =>
+        _ = Task.Run(async () =>
         {
             if (before.VoiceChannel is not null)
-                ScanChannelForVoiceXp(before.VoiceChannel);
+                await ScanChannelForVoiceXp(before.VoiceChannel);
 
             if (after.VoiceChannel is not null && after.VoiceChannel != before.VoiceChannel)
-                ScanChannelForVoiceXp(after.VoiceChannel);
+                await ScanChannelForVoiceXp(after.VoiceChannel);
             else if (after.VoiceChannel is null)
                 // In this case, the user left the channel and the previous for loops didn't catch
                 // it because it wasn't in any new channel. So we need to get rid of it.
-                UserLeftVoiceChannel(user, before.VoiceChannel);
+                await UserLeftVoiceChannel(user, before.VoiceChannel);
         });
 
         return Task.CompletedTask;
     }
 
-    private void ScanChannelForVoiceXp(SocketVoiceChannel channel)
+    private async Task ScanChannelForVoiceXp(SocketVoiceChannel channel)
     {
         if (ShouldTrackVoiceChannel(channel))
         {
             foreach (var user in channel.Users)
-                ScanUserForVoiceXp(user, channel);
+                await ScanUserForVoiceXp(user, channel);
         }
         else
         {
             foreach (var user in channel.Users)
-                UserLeftVoiceChannel(user, channel);
+                await UserLeftVoiceChannel(user, channel);
         }
     }
 
@@ -502,12 +500,12 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
     /// </summary>
     /// <param name="user"></param>
     /// <param name="channel"></param>
-    private void ScanUserForVoiceXp(SocketGuildUser user, SocketVoiceChannel channel)
+    private async Task ScanUserForVoiceXp(SocketGuildUser user, SocketVoiceChannel channel)
     {
         if (UserParticipatingInVoiceChannel(user) && ShouldTrackXp(user, channel.Id))
-            UserJoinedVoiceChannel(user);
+            await UserJoinedVoiceChannel(user);
         else
-            UserLeftVoiceChannel(user, channel);
+            await UserLeftVoiceChannel(user, channel);
     }
 
     private bool ShouldTrackVoiceChannel(SocketVoiceChannel channel)
@@ -516,32 +514,31 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
     private bool UserParticipatingInVoiceChannel(SocketGuildUser user)
         => !user.IsDeafened && !user.IsMuted && !user.IsSelfDeafened && !user.IsSelfMuted;
 
-    private void UserJoinedVoiceChannel(SocketGuildUser user)
+    private TypedKey<long> GetVoiceXpKey(ulong userId)
+        => new($"xp:vc_join:{userId}");
+    
+    private async Task UserJoinedVoiceChannel(SocketGuildUser user)
     {
-        var key = $"{_creds.RedisKey()}_user_xp_vc_join_{user.Id}";
         var value = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
 
-        _cache.Redis.GetDatabase()
+        await _c.AddAsync(GetVoiceXpKey(user.Id),
-              .StringSet(key,
             value,
             TimeSpan.FromMinutes(_xpConfig.Data.VoiceMaxMinutes),
-                  when: When.NotExists);
+            overwrite: false);
     }
 
-    private void UserLeftVoiceChannel(SocketGuildUser user, SocketVoiceChannel channel)
+    private async Task UserLeftVoiceChannel(SocketGuildUser user, SocketVoiceChannel channel)
     {
-        var key = $"{_creds.RedisKey()}_user_xp_vc_join_{user.Id}";
+        var key = GetVoiceXpKey(user.Id);
-        var value = _cache.Redis.GetDatabase().StringGet(key);
+        var result = await _c.GetAsync(key);
-        _cache.Redis.GetDatabase().KeyDelete(key);
+        if (!await _c.RemoveAsync(key))
+            return;
 
         // Allow for if this function gets called multiple times when a user leaves a channel.
-        if (value.IsNull)
+        if (!result.TryGetValue(out var unixTime))
             return;
 
-        if (!value.TryParse(out long startUnixTime))
+        var dateStart = DateTimeOffset.FromUnixTimeSeconds(unixTime);
-            return;
-
-        var dateStart = DateTimeOffset.FromUnixTimeSeconds(startUnixTime);
         var dateEnd = DateTimeOffset.UtcNow;
         var minutes = (dateEnd - dateStart).TotalMinutes;
         var xp = _xpConfig.Data.VoiceXpPerMinute * minutes;
@@ -577,7 +574,7 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
         if (arg.Author is not SocketGuildUser user || user.IsBot)
             return Task.CompletedTask;
 
-        _ = Task.Run(() =>
+        _ = Task.Run(async () =>
         {
             if (!ShouldTrackXp(user, arg.Channel.Id))
                 return;
@@ -593,7 +590,7 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
             if (xp <= 0)
                 return;
 
-            if (!SetUserRewarded(user.Id))
+            if (!await SetUserRewardedAsync(user.Id))
                 return;
 
             _addMessageXp.Enqueue(new()
@@ -650,16 +647,14 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
         return Enumerable.Empty<ulong>();
     }
 
-    private bool SetUserRewarded(ulong userId)
+    private static TypedKey<bool> GetUserRewKey(ulong userId)
-    {
+        => new($"xp:user_gain:{userId}");
-        var r = _cache.Redis.GetDatabase();
-        var key = $"{_creds.RedisKey()}_user_xp_gain_{userId}";
 
-        return r.StringSet(key,
+    private async Task<bool> SetUserRewardedAsync(ulong userId)
+        => await _c.AddAsync(GetUserRewKey(userId),
             true,
-            TimeSpan.FromMinutes(_xpConfig.Data.MessageXpCooldown),
+            expiry: TimeSpan.FromMinutes(_xpConfig.Data.MessageXpCooldown),
-            when: When.NotExists);
+            overwrite: false);
-    }
 
     public async Task<FullUserStats> GetUserStatsAsync(IGuildUser user)
     {
@@ -782,7 +777,7 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
                 }
             }.WithFallbackFonts(_fonts.FallBackFonts);
 
-            using var img = Image.Load<Rgba32>(_images.XpBackground, out var imageFormat);
+            using var img = Image.Load<Rgba32>(await GetXpBackgroundAsync(stats.User.UserId), out var imageFormat);
             if (template.User.Name.Show)
             {
                 var fontSize = (int)(template.User.Name.FontSize * 0.9);
@@ -979,8 +974,8 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
                 {
                     var avatarUrl = stats.User.RealAvatarUrl();
 
-                    var (succ, data) = await _cache.TryGetImageDataAsync(avatarUrl);
+                    var result = await _c.GetImageDataAsync(avatarUrl);
-                    if (!succ)
+                    if (!result.TryPickT0(out var data, out _))
                     {
                         using (var http = _httpFactory.CreateClient())
                         {
@@ -999,7 +994,7 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
                             }
                         }
 
-                        await _cache.SetImageDataAsync(avatarUrl, data);
+                        await _c.SetImageDataAsync(avatarUrl, data);
                     }
 
                     using var toDraw = Image.Load(data);
@@ -1033,6 +1028,12 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
             return output;
         });
 
+    private async Task<byte[]> GetXpBackgroundAsync(ulong userId)
+    {
+        var img = await _images.GetXpBackgroundImageAsync();
+        return img;
+    }
+
     // #if GLOBAL_NADEKO
     private async Task DrawFrame(Image<Rgba32> img, ulong userId)
     {
@@ -1103,8 +1104,8 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
             try
             {
                 var imgUrl = new Uri(stats.User.Club.ImageUrl);
-                var (succ, data) = await _cache.TryGetImageDataAsync(imgUrl);
+                var result = await _c.GetImageDataAsync(imgUrl);
-                if (!succ)
+                if (!result.TryPickT0(out var data, out _))
                 {
                     using (var http = _httpFactory.CreateClient())
                     using (var temp = await http.GetAsync(imgUrl, HttpCompletionOption.ResponseHeadersRead))
@@ -1127,7 +1128,7 @@ public class XpService : INService, IReadyExecutor, IExecNoCommand
                         }
                     }
 
-                    await _cache.SetImageDataAsync(imgUrl, data);
+                    await _c.SetImageDataAsync(imgUrl, data);
                 }
 
                 using var toDraw = Image.Load(data);

src/NadekoBot/NadekoBot.csproj

@@ -52,6 +52,7 @@
         <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="6.0.0" />
         <PackageReference Include="Microsoft.SyndicationFeed.ReaderWriter" Version="1.0.2" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+        <PackageReference Include="NonBlocking" Version="2.0.0" />
         <PackageReference Include="OneOf" Version="3.0.216" />
         <PackageReference Include="Scrutor" Version="4.1.0" />
         <PackageReference Include="Serilog.Sinks.Console" Version="4.0.1" />

src/NadekoBot/Services/IDataCache.cs

@@ -1,35 +0,0 @@
-#nullable disable
-using StackExchange.Redis;
-
-namespace NadekoBot.Services;
-
-public interface IDataCache
-{
-    ConnectionMultiplexer Redis { get; }
-    IImageCache LocalImages { get; }
-    ILocalDataCache LocalData { get; }
-
-    Task<(bool Success, byte[] Data)> TryGetImageDataAsync(Uri key);
-    Task<(bool Success, string Data)> TryGetAnimeDataAsync(string key);
-    Task<(bool Success, string Data)> TryGetNovelDataAsync(string key);
-    Task SetImageDataAsync(Uri key, byte[] data);
-    Task SetAnimeDataAsync(string link, string data);
-    Task SetNovelDataAsync(string link, string data);
-    TimeSpan? AddTimelyClaim(ulong id, int period);
-    TimeSpan? TryAddRatelimit(ulong id, string name, int expireIn);
-    void RemoveAllTimelyClaims();
-    bool TryAddAffinityCooldown(ulong userId, out TimeSpan? time);
-    bool TryAddDivorceCooldown(ulong userId, out TimeSpan? time);
-    bool TryGetEconomy(out string data);
-    void SetEconomy(string data);
-
-    Task<TOut> GetOrAddCachedDataAsync<TParam, TOut>(
-        string key,
-        Func<TParam, Task<TOut>> factory,
-        TParam param,
-        TimeSpan expiry)
-        where TOut : class;
-
-    DateTime GetLastCurrencyDecay();
-    void SetLastCurrencyDecay();
-}

src/NadekoBot/Services/IImageCache.cs

@@ -1,29 +0,0 @@
-#nullable disable
-namespace NadekoBot.Services;
-
-public interface IImageCache
-{
-    ImageUrls ImageUrls { get; }
-
-    IReadOnlyList<byte[]> Heads { get; }
-    IReadOnlyList<byte[]> Tails { get; }
-
-    IReadOnlyList<byte[]> Dice { get; }
-
-    IReadOnlyList<byte[]> SlotEmojis { get; }
-    IReadOnlyList<byte[]> Currency { get; }
-
-    byte[] SlotBackground { get; }
-
-    byte[] RategirlMatrix { get; }
-    byte[] RategirlDot { get; }
-
-    byte[] XpBackground { get; }
-
-    byte[] Rip { get; }
-    byte[] RipOverlay { get; }
-
-    byte[] GetCard(string key);
-
-    Task Reload();
-}

src/NadekoBot/Services/ILocalDataCache.cs

@@ -6,8 +6,8 @@ namespace NadekoBot.Services;
 
 public interface ILocalDataCache
 {
-    IReadOnlyDictionary<string, SearchPokemon> Pokemons { get; }
+    Task<IReadOnlyDictionary<string, SearchPokemon>> GetPokemonsAsync();
-    IReadOnlyDictionary<string, SearchPokemonAbility> PokemonAbilities { get; }
+    Task<IReadOnlyDictionary<string, SearchPokemonAbility>> GetPokemonAbilitiesAsync();
-    IReadOnlyDictionary<int, string> PokemonMap { get; }
+    Task<TriviaQuestionModel[]> GetTriviaQuestionsAsync();
-    TriviaQuestion[] TriviaQuestions { get; }
+    Task<PokemonNameId[]> GetPokemonMapAsync();
 }

src/NadekoBot/Services/Impl/BotCredsProvider.cs

@@ -172,9 +172,10 @@ public sealed class BotCredsProvider : IBotCredsProvider
         if (File.Exists(CREDS_FILE_NAME))
         {
             var creds = Yaml.Deserializer.Deserialize<Creds>(File.ReadAllText(CREDS_FILE_NAME));
-            if (creds.Version <= 4)
+            if (creds.Version <= 5)
             {
-                creds.Version = 5;
+                creds.Version = 6;
+                creds.BotCache = BotCacheImplemenation.Redis;
                 File.WriteAllText(CREDS_FILE_NAME, Yaml.Serializer.Serialize(creds));
             }
         }

src/NadekoBot/Services/Impl/LocalDataCache.cs

@@ -0,0 +1,82 @@
+using NadekoBot.Common.Pokemon;
+using NadekoBot.Modules.Games.Common.Trivia;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Services;
+
+public sealed class LocalDataCache : ILocalDataCache, INService
+{
+    private const string POKEMON_ABILITIES_FILE = "data/pokemon/pokemon_abilities.json";
+    private const string POKEMON_LIST_FILE = "data/pokemon/pokemon_list.json";
+    private const string POKEMON_MAP_PATH = "data/pokemon/name-id_map.json";
+    private const string QUESTIONS_FILE = "data/trivia_questions.json";
+
+    private readonly IBotCache _cache;
+
+    private readonly JsonSerializerOptions _opts = new JsonSerializerOptions()
+    {
+        AllowTrailingCommas = true,
+        NumberHandling = JsonNumberHandling.AllowReadingFromString,
+        PropertyNameCaseInsensitive = true
+    };
+
+    public LocalDataCache(IBotCache cache)
+        => _cache = cache;
+
+    private async Task<T?> GetOrCreateCachedDataAsync<T>(
+        TypedKey<T> key,
+        string fileName)
+        => await _cache.GetOrAddAsync(key,
+            async () =>
+            {
+                if (!File.Exists(fileName))
+                {
+                    Log.Warning($"{fileName} is missing. Relevant data can't be loaded");
+                    return default;
+                }
+
+                try
+                {
+                    await using var stream = File.OpenRead(fileName);
+                    return await JsonSerializer.DeserializeAsync<T>(stream, _opts);
+                }
+                catch (Exception ex)
+                {
+                    Log.Error(ex,
+                        "Error reading {FileName} file: {ErrorMessage}",
+                        fileName,
+                        ex.Message);
+
+                    return default;
+                }
+            });
+
+
+    private static TypedKey<IReadOnlyDictionary<string, SearchPokemon>> _pokemonListKey
+        = new("pokemon:list");
+
+    public async Task<IReadOnlyDictionary<string, SearchPokemon>?> GetPokemonsAsync()
+        => await GetOrCreateCachedDataAsync(_pokemonListKey, POKEMON_LIST_FILE);
+
+
+    private static TypedKey<IReadOnlyDictionary<string, SearchPokemonAbility>> _pokemonAbilitiesKey
+        = new("pokemon:abilities");
+
+    public async Task<IReadOnlyDictionary<string, SearchPokemonAbility>?> GetPokemonAbilitiesAsync()
+        => await GetOrCreateCachedDataAsync(_pokemonAbilitiesKey, POKEMON_ABILITIES_FILE);
+
+
+    private static TypedKey<PokemonNameId[]> _pokeMapKey
+        = new("pokemon:ab_map");
+
+    public async Task<PokemonNameId[]?> GetPokemonMapAsync()
+        => await GetOrCreateCachedDataAsync(_pokeMapKey, POKEMON_MAP_PATH);
+
+
+    private static TypedKey<TriviaQuestionModel[]> _triviaKey
+        = new("trivia:questions");
+
+    public async Task<TriviaQuestionModel[]?> GetTriviaQuestionsAsync()
+        => await GetOrCreateCachedDataAsync(_triviaKey, QUESTIONS_FILE);
+}

src/NadekoBot/Services/Impl/RedisCache.cs

@@ -1,216 +0,0 @@
-#nullable disable
-using Newtonsoft.Json;
-using StackExchange.Redis;
-using System.Net;
-
-namespace NadekoBot.Services;
-
-public class RedisCache : IDataCache
-{
-    public ConnectionMultiplexer Redis { get; }
-
-    public IImageCache LocalImages { get; }
-    public ILocalDataCache LocalData { get; }
-
-    private readonly string _redisKey;
-    private readonly EndPoint _redisEndpoint;
-
-    private readonly object _timelyLock = new();
-
-    public RedisCache(
-        ConnectionMultiplexer redis,
-        IBotCredentials creds,
-        IImageCache imageCache,
-        ILocalDataCache dataCache)
-    {
-        Redis = redis;
-        _redisEndpoint = Redis.GetEndPoints().First();
-        LocalImages = imageCache;
-        LocalData = dataCache;
-        _redisKey = creds.RedisKey();
-    }
-
-    // things here so far don't need the bot id
-    // because it's a good thing if different bots 
-    // which are hosted on the same PC
-    // can re-use the same image/anime data
-    public async Task<(bool Success, byte[] Data)> TryGetImageDataAsync(Uri key)
-    {
-        var db = Redis.GetDatabase();
-        byte[] x = await db.StringGetAsync("image_" + key);
-        return (x is not null, x);
-    }
-
-    public Task SetImageDataAsync(Uri key, byte[] data)
-    {
-        var db = Redis.GetDatabase();
-        return db.StringSetAsync("image_" + key, data);
-    }
-
-    public async Task<(bool Success, string Data)> TryGetAnimeDataAsync(string key)
-    {
-        var db = Redis.GetDatabase();
-        string x = await db.StringGetAsync("anime_" + key);
-        return (x is not null, x);
-    }
-
-    public Task SetAnimeDataAsync(string key, string data)
-    {
-        var db = Redis.GetDatabase();
-        return db.StringSetAsync("anime_" + key, data, TimeSpan.FromHours(3));
-    }
-
-    public async Task<(bool Success, string Data)> TryGetNovelDataAsync(string key)
-    {
-        var db = Redis.GetDatabase();
-        string x = await db.StringGetAsync("novel_" + key);
-        return (x is not null, x);
-    }
-
-    public Task SetNovelDataAsync(string key, string data)
-    {
-        var db = Redis.GetDatabase();
-        return db.StringSetAsync("novel_" + key, data, TimeSpan.FromHours(3));
-    }
-
-    public TimeSpan? AddTimelyClaim(ulong id, int period)
-    {
-        if (period == 0)
-            return null;
-        lock (_timelyLock)
-        {
-            var time = TimeSpan.FromHours(period);
-            var db = Redis.GetDatabase();
-            if ((bool?)db.StringGet($"{_redisKey}_timelyclaim_{id}") is null)
-            {
-                db.StringSet($"{_redisKey}_timelyclaim_{id}", true, time);
-                return null;
-            }
-
-            return db.KeyTimeToLive($"{_redisKey}_timelyclaim_{id}");
-        }
-    }
-
-    public void RemoveAllTimelyClaims()
-    {
-        var server = Redis.GetServer(_redisEndpoint);
-        var db = Redis.GetDatabase();
-        foreach (var k in server.Keys(pattern: $"{_redisKey}_timelyclaim_*"))
-            db.KeyDelete(k, CommandFlags.FireAndForget);
-    }
-
-    public bool TryAddAffinityCooldown(ulong userId, out TimeSpan? time)
-    {
-        var db = Redis.GetDatabase();
-        time = db.KeyTimeToLive($"{_redisKey}_affinity_{userId}");
-        if (time is null)
-        {
-            time = TimeSpan.FromMinutes(30);
-            db.StringSet($"{_redisKey}_affinity_{userId}", true, time);
-            return true;
-        }
-
-        return false;
-    }
-
-    public bool TryAddDivorceCooldown(ulong userId, out TimeSpan? time)
-    {
-        var db = Redis.GetDatabase();
-        time = db.KeyTimeToLive($"{_redisKey}_divorce_{userId}");
-        if (time is null)
-        {
-            time = TimeSpan.FromHours(6);
-            db.StringSet($"{_redisKey}_divorce_{userId}", true, time);
-            return true;
-        }
-
-        return false;
-    }
-
-    public Task SetStreamDataAsync(string url, string data)
-    {
-        var db = Redis.GetDatabase();
-        return db.StringSetAsync($"{_redisKey}_stream_{url}", data, TimeSpan.FromHours(6));
-    }
-
-    public bool TryGetStreamData(string url, out string dataStr)
-    {
-        var db = Redis.GetDatabase();
-        dataStr = db.StringGet($"{_redisKey}_stream_{url}");
-
-        return !string.IsNullOrWhiteSpace(dataStr);
-    }
-
-    public TimeSpan? TryAddRatelimit(ulong id, string name, int expireIn)
-    {
-        var db = Redis.GetDatabase();
-        if (db.StringSet($"{_redisKey}_ratelimit_{id}_{name}",
-                0, // i don't use the value
-                TimeSpan.FromSeconds(expireIn),
-                when: When.NotExists))
-        {
-            return null;
-        }
-
-        return db.KeyTimeToLive($"{_redisKey}_ratelimit_{id}_{name}");
-    }
-
-    public bool TryGetEconomy(out string data)
-    {
-        var db = Redis.GetDatabase();
-        data = db.StringGet($"{_redisKey}_economy");
-        if (data is not null)
-            return true;
-
-        return false;
-    }
-
-    public void SetEconomy(string data)
-    {
-        var db = Redis.GetDatabase();
-        db.StringSet($"{_redisKey}_economy", data, TimeSpan.FromMinutes(3));
-    }
-
-    public async Task<TOut> GetOrAddCachedDataAsync<TParam, TOut>(
-        string key,
-        Func<TParam, Task<TOut>> factory,
-        TParam param,
-        TimeSpan expiry)
-        where TOut : class
-    {
-        var db = Redis.GetDatabase();
-
-        var data = await db.StringGetAsync(key);
-        if (!data.HasValue)
-        {
-            var obj = await factory(param);
-
-            if (obj is null)
-                return default;
-
-            await db.StringSetAsync(key, JsonConvert.SerializeObject(obj), expiry);
-
-            return obj;
-        }
-
-        return (TOut)JsonConvert.DeserializeObject(data, typeof(TOut));
-    }
-
-    public DateTime GetLastCurrencyDecay()
-    {
-        var db = Redis.GetDatabase();
-
-        var str = (string)db.StringGet($"{_redisKey}_last_currency_decay");
-        if (string.IsNullOrEmpty(str))
-            return DateTime.MinValue;
-
-        return JsonConvert.DeserializeObject<DateTime>(str);
-    }
-
-    public void SetLastCurrencyDecay()
-    {
-        var db = Redis.GetDatabase();
-
-        db.StringSet($"{_redisKey}_last_currency_decay", JsonConvert.SerializeObject(DateTime.UtcNow));
-    }
-}

src/NadekoBot/Services/Impl/RedisImagesCache.cs

@@ -1,297 +1,111 @@
-#nullable disable
+using NadekoBot.Common.Configs;
-using NadekoBot.Common.ModuleBehaviors;
-using NadekoBot.Common.Yml;
-using Newtonsoft.Json;
-using StackExchange.Redis;
 
 namespace NadekoBot.Services;
 
-public sealed class RedisImagesCache : IImageCache, IReadyExecutor
+public sealed class ImagesConfig : ConfigServiceBase<ImageUrls>
 {
-    public enum ImageKeys
+    private const string PATH = "data/images.yml";
+
+    private static readonly TypedKey<ImageUrls> _changeKey =
+        new("config.images.updated");
+    
+    public override string Name
+        => "images";
+
+    public ImagesConfig(IConfigSeria serializer, IPubSub pubSub)
+        : base(PATH, serializer, pubSub, _changeKey)
     {
-        CoinHeads,
-        CoinTails,
-        Dice,
-        SlotBg,
-        SlotEmojis,
-        Currency,
-        RategirlMatrix,
-        RategirlDot,
-        RipOverlay,
-        RipBg,
-        XpBg
-    }
-
-    private const string BASE_PATH = "data/";
-    private const string CARDS_PATH = $"{BASE_PATH}images/cards";
-
-    private IDatabase Db
-        => _con.GetDatabase();
-
-    public ImageUrls ImageUrls { get; private set; }
-
-    public IReadOnlyList<byte[]> Heads
-        => GetByteArrayData(ImageKeys.CoinHeads);
-
-    public IReadOnlyList<byte[]> Tails
-        => GetByteArrayData(ImageKeys.CoinTails);
-
-    public IReadOnlyList<byte[]> Dice
-        => GetByteArrayData(ImageKeys.Dice);
-
-    public IReadOnlyList<byte[]> SlotEmojis
-        => GetByteArrayData(ImageKeys.SlotEmojis);
-
-    public IReadOnlyList<byte[]> Currency
-        => GetByteArrayData(ImageKeys.Currency);
-
-    public byte[] SlotBackground
-        => GetByteData(ImageKeys.SlotBg);
-
-    public byte[] RategirlMatrix
-        => GetByteData(ImageKeys.RategirlMatrix);
-
-    public byte[] RategirlDot
-        => GetByteData(ImageKeys.RategirlDot);
-
-    public byte[] XpBackground
-        => GetByteData(ImageKeys.XpBg);
-
-    public byte[] Rip
-        => GetByteData(ImageKeys.RipBg);
-
-    public byte[] RipOverlay
-        => GetByteData(ImageKeys.RipOverlay);
-
-    private readonly ConnectionMultiplexer _con;
-    private readonly IBotCredentials _creds;
-    private readonly HttpClient _http;
-    private readonly string _imagesPath;
-
-    public RedisImagesCache(ConnectionMultiplexer con, IBotCredentials creds)
-    {
-        _con = con;
-        _creds = creds;
-        _http = new();
-        _imagesPath = Path.Combine(BASE_PATH, "images.yml");
-
-        Migrate();
-
-        ImageUrls = Yaml.Deserializer.Deserialize<ImageUrls>(File.ReadAllText(_imagesPath));
-    }
-
-    public byte[] GetCard(string key)
-        // since cards are always local for now, don't cache them
-        => File.ReadAllBytes(Path.Join(CARDS_PATH, key + ".jpg"));
-
-    public async Task OnReadyAsync()
-    {
-        if (await AllKeysExist())
-            return;
-
-        await Reload();
-    }
-
-    private void Migrate()
-    {
-        // migrate to yml
-        if (File.Exists(Path.Combine(BASE_PATH, "images.json")))
-        {
-            var oldFilePath = Path.Combine(BASE_PATH, "images.json");
-            var backupFilePath = Path.Combine(BASE_PATH, "images.json.backup");
-
-            var oldData = JsonConvert.DeserializeObject<OldImageUrls>(File.ReadAllText(oldFilePath));
-
-            if (oldData is not null)
-            {
-                var newData = new ImageUrls
-                {
-                    Coins =
-                        new()
-                        {
-                            Heads =
-                                oldData.Coins.Heads.Length == 1
-                                && oldData.Coins.Heads[0].ToString()
-                                == "https://nadeko-pictures.nyc3.digitaloceanspaces.com/other/coins/heads.png"
-                                    ? new[] { new Uri("https://cdn.nadeko.bot/coins/heads3.png") }
-                                    : oldData.Coins.Heads,
-                            Tails = oldData.Coins.Tails.Length == 1
-                                    && oldData.Coins.Tails[0].ToString()
-                                    == "https://nadeko-pictures.nyc3.digitaloceanspaces.com/other/coins/tails.png"
-                                ? new[] { new Uri("https://cdn.nadeko.bot/coins/tails3.png") }
-                                : oldData.Coins.Tails
-                        },
-                    Dice = oldData.Dice.Map(x => x.ToNewCdn()),
-                    Currency = oldData.Currency.Map(x => x.ToNewCdn()),
-                    Rategirl =
-                        new()
-                        {
-                            Dot = oldData.Rategirl.Dot.ToNewCdn(),
-                            Matrix = oldData.Rategirl.Matrix.ToNewCdn()
-                        },
-                    Rip = new()
-                    {
-                        Bg = oldData.Rip.Bg.ToNewCdn(),
-                        Overlay = oldData.Rip.Overlay.ToNewCdn()
-                    },
-                    Slots = new()
-                    {
-                        Bg = new("https://cdn.nadeko.bot/slots/slots_bg.png"),
-                        Emojis = new[]
-                        {
-                            "https://cdn.nadeko.bot/slots/0.png", "https://cdn.nadeko.bot/slots/1.png",
-                            "https://cdn.nadeko.bot/slots/2.png", "https://cdn.nadeko.bot/slots/3.png",
-                            "https://cdn.nadeko.bot/slots/4.png", "https://cdn.nadeko.bot/slots/5.png"
-                        }.Map(x => new Uri(x))
-                    },
-                    Xp = new()
-                    {
-                        Bg = oldData.Xp.Bg.ToNewCdn()
-                    },
-                    Version = 2
-                };
-
-                File.Move(oldFilePath, backupFilePath, true);
-                File.WriteAllText(_imagesPath, Yaml.Serializer.Serialize(newData));
     }
 }
 
-        // removed numbers from slots
+public interface IImageCache
-        var localImageUrls = Yaml.Deserializer.Deserialize<ImageUrls>(File.ReadAllText(_imagesPath));
-        if (localImageUrls.Version == 2)
 {
-            localImageUrls.Version = 3;
+    Task<byte[]?> GetHeadsImageAsync();
-            File.WriteAllText(_imagesPath, Yaml.Serializer.Serialize(localImageUrls));
+    Task<byte[]?> GetTailsImageAsync();
+    Task<byte[]?> GetCurrencyImageAsync();
+    Task<byte[]?> GetXpBackgroundImageAsync();
+    Task<byte[]?> GetRategirlBgAsync();
+    Task<byte[]?> GetRategirlDotAsync();
+    Task<byte[]?> GetDiceAsync(int num);
+    Task<byte[]?> GetSlotEmojiAsync(int number);
+    Task<byte[]?> GetSlotBgAsync();
+    Task<byte[]?> GetRipBgAsync();
+    Task<byte[]?> GetRipOverlayAsync();
 }
 
-        if (localImageUrls.Version == 3)
+public sealed class ImageCache : IImageCache, INService
 {
-            localImageUrls.Version = 4;
+    private readonly IBotCache _cache;
-            if (localImageUrls.Xp?.Bg.ToString() == "https://cdn.nadeko.bot/other/xp/bg.png")
+    private readonly ImagesConfig _ic;
-                localImageUrls.Xp.Bg = new("https://cdn.nadeko.bot/other/xp/bg_k.png");
+    private readonly Random _rng;
+    private readonly IHttpClientFactory _httpFactory;
 
-            File.WriteAllText(_imagesPath, Yaml.Serializer.Serialize(localImageUrls));
+    public ImageCache(
-        }
+        IBotCache cache,
+        ImagesConfig ic,
+        IHttpClientFactory httpFactory)
+    {
+        _cache = cache;
+        _ic = ic;
+        _httpFactory = httpFactory;
+        _rng = new NadekoRandom();
     }
 
-    public async Task Reload()
+    private static TypedKey<byte[]> GetImageKey(Uri url)
-    {
+        => new($"image:{url}");
-        ImageUrls = Yaml.Deserializer.Deserialize<ImageUrls>(await File.ReadAllTextAsync(_imagesPath));
-        foreach (var key in GetAllKeys())
-        {
-            switch (key)
-            {
-                case ImageKeys.CoinHeads:
-                    await Load(key, ImageUrls.Coins.Heads);
-                    break;
-                case ImageKeys.CoinTails:
-                    await Load(key, ImageUrls.Coins.Tails);
-                    break;
-                case ImageKeys.Dice:
-                    await Load(key, ImageUrls.Dice);
-                    break;
-                case ImageKeys.SlotBg:
-                    await Load(key, ImageUrls.Slots.Bg);
-                    break;
-                case ImageKeys.SlotEmojis:
-                    await Load(key, ImageUrls.Slots.Emojis);
-                    break;
-                case ImageKeys.Currency:
-                    await Load(key, ImageUrls.Currency);
-                    break;
-                case ImageKeys.RategirlMatrix:
-                    await Load(key, ImageUrls.Rategirl.Matrix);
-                    break;
-                case ImageKeys.RategirlDot:
-                    await Load(key, ImageUrls.Rategirl.Dot);
-                    break;
-                case ImageKeys.RipOverlay:
-                    await Load(key, ImageUrls.Rip.Overlay);
-                    break;
-                case ImageKeys.RipBg:
-                    await Load(key, ImageUrls.Rip.Bg);
-                    break;
-                case ImageKeys.XpBg:
-                    await Load(key, ImageUrls.Xp.Bg);
-                    break;
-                default:
-                    throw new ArgumentOutOfRangeException();
-            }
-        }
-    }
 
-    private async Task Load(ImageKeys key, Uri uri)
+    private async Task<byte[]?> GetImageDataAsync(Uri url)
+        => await _cache.GetOrAddAsync(
+            GetImageKey(url),
+            async () =>
             {
-        var data = await GetImageData(uri);
+                using var http = _httpFactory.CreateClient();
-        if (data is null)
+                var bytes = await http.GetByteArrayAsync(url);
-            return;
-
-        await Db.StringSetAsync(GetRedisKey(key), data);
-    }
-
-    private async Task Load(ImageKeys key, Uri[] uris)
-    {
-        await Db.KeyDeleteAsync(GetRedisKey(key));
-        var imageData = await uris.Select(GetImageData).WhenAll();
-        var vals = imageData.Where(x => x is not null).Select(x => (RedisValue)x).ToArray();
-
-        await Db.ListRightPushAsync(GetRedisKey(key), vals);
-
-        if (uris.Length != vals.Length)
-        {
-            Log.Information(
-                "{Loaded}/{Max} URIs for the key '{ImageKey}' have been loaded.\n"
-                + "Some of the supplied URIs are either unavailable or invalid",
-                vals.Length,
-                uris.Length,
-                key);
-        }
-    }
-
-    private async Task<byte[]> GetImageData(Uri uri)
-    {
-        if (uri.IsFile)
-        {
-            try
-            {
-                var bytes = await File.ReadAllBytesAsync(uri.LocalPath);
                 return bytes;
-            }
+            },
-            catch (Exception ex)
+            expiry: 48.Hours());
+
+    private async Task<byte[]?> GetRandomImageDataAsync(Uri[] urls)
     {
-                Log.Warning(ex, "Failed reading image bytes from uri: {Uri}", uri.ToString());
+        if (urls.Length == 0)
             return null;
-            }
+
+        var url = urls[_rng.Next(0, urls.Length)];
+
+        var data = await GetImageDataAsync(url);
+        return data;
     }
 
-        try
+    public Task<byte[]?> GetHeadsImageAsync()
-        {
+        => GetRandomImageDataAsync(_ic.Data.Coins.Heads);
-            return await _http.GetByteArrayAsync(uri);
+
-        }
+    public Task<byte[]?> GetTailsImageAsync()
-        catch (Exception ex)
+        => GetRandomImageDataAsync(_ic.Data.Coins.Tails);
-        {
+
-            Log.Warning(ex, "Image url you provided is not a valid image: {Uri}", uri.ToString());
+    public Task<byte[]?> GetCurrencyImageAsync()
-            return null;
+        => GetRandomImageDataAsync(_ic.Data.Currency);
-        }
+
-    }
+    public Task<byte[]?> GetXpBackgroundImageAsync()
-
+        => GetImageDataAsync(_ic.Data.Xp.Bg);
-    private async Task<bool> AllKeysExist()
+
-    {
+    public Task<byte[]?> GetRategirlBgAsync()
-        var tasks = await GetAllKeys().Select(x => Db.KeyExistsAsync(GetRedisKey(x))).WhenAll();
+        => GetImageDataAsync(_ic.Data.Rategirl.Matrix);
-
+
-        return tasks.All(exist => exist);
+    public Task<byte[]?> GetRategirlDotAsync()
-    }
+        => GetImageDataAsync(_ic.Data.Rategirl.Dot);
-
+
-    private IEnumerable<ImageKeys> GetAllKeys()
+    public Task<byte[]?> GetDiceAsync(int num)
-        => Enum.GetValues<ImageKeys>();
+        => GetImageDataAsync(_ic.Data.Dice[num]);
-
+
-    private byte[][] GetByteArrayData(ImageKeys key)
+    public Task<byte[]?> GetSlotEmojiAsync(int number)
-        => Db.ListRange(GetRedisKey(key)).Map(x => (byte[])x);
+        => GetImageDataAsync(_ic.Data.Slots.Emojis[number]);
-
+
-    private byte[] GetByteData(ImageKeys key)
+    public Task<byte[]?> GetSlotBgAsync()
-        => Db.StringGet(GetRedisKey(key));
+        => GetImageDataAsync(_ic.Data.Slots.Bg);
-
+
-    private RedisKey GetRedisKey(ImageKeys key)
+    public Task<byte[]?> GetRipBgAsync()
-        => _creds.RedisKey() + "_image_" + key;
+        => GetImageDataAsync(_ic.Data.Rip.Bg);
+
+    public Task<byte[]?> GetRipOverlayAsync()
+        => GetImageDataAsync(_ic.Data.Rip.Overlay);
 }

src/NadekoBot/Services/Impl/RedisLocalDataCache.cs

@@ -1,90 +0,0 @@
-#nullable disable
-using NadekoBot.Common.Pokemon;
-using NadekoBot.Modules.Games.Common.Trivia;
-using Newtonsoft.Json;
-using StackExchange.Redis;
-
-namespace NadekoBot.Services;
-
-public class RedisLocalDataCache : ILocalDataCache
-{
-    private const string POKEMON_ABILITIES_FILE = "data/pokemon/pokemon_abilities.json";
-    private const string POKEMON_LIST_FILE = "data/pokemon/pokemon_list.json";
-    private const string POKEMON_MAP_PATH = "data/pokemon/name-id_map.json";
-    private const string QUESTIONS_FILE = "data/trivia_questions.json";
-
-    public IReadOnlyDictionary<string, SearchPokemon> Pokemons
-    {
-        get => Get<Dictionary<string, SearchPokemon>>("pokemon_list");
-        private init => Set("pokemon_list", value);
-    }
-
-    public IReadOnlyDictionary<string, SearchPokemonAbility> PokemonAbilities
-    {
-        get => Get<Dictionary<string, SearchPokemonAbility>>("pokemon_abilities");
-        private init => Set("pokemon_abilities", value);
-    }
-
-    public TriviaQuestion[] TriviaQuestions
-    {
-        get => Get<TriviaQuestion[]>("trivia_questions");
-        private init => Set("trivia_questions", value);
-    }
-
-    public IReadOnlyDictionary<int, string> PokemonMap
-    {
-        get => Get<Dictionary<int, string>>("pokemon_map");
-        private init => Set("pokemon_map", value);
-    }
-
-    private readonly ConnectionMultiplexer _con;
-    private readonly IBotCredentials _creds;
-
-    public RedisLocalDataCache(ConnectionMultiplexer con, IBotCredentials creds, DiscordSocketClient client)
-    {
-        _con = con;
-        _creds = creds;
-        var shardId = client.ShardId;
-
-        if (shardId == 0)
-        {
-            if (!File.Exists(POKEMON_LIST_FILE))
-                Log.Warning($"{POKEMON_LIST_FILE} is missing. Pokemon abilities not loaded");
-            else
-            {
-                Pokemons =
-                    JsonConvert.DeserializeObject<Dictionary<string, SearchPokemon>>(
-                        File.ReadAllText(POKEMON_LIST_FILE));
-            }
-
-            if (!File.Exists(POKEMON_ABILITIES_FILE))
-                Log.Warning($"{POKEMON_ABILITIES_FILE} is missing. Pokemon abilities not loaded.");
-            else
-            {
-                PokemonAbilities =
-                    JsonConvert.DeserializeObject<Dictionary<string, SearchPokemonAbility>>(
-                        File.ReadAllText(POKEMON_ABILITIES_FILE));
-            }
-
-            try
-            {
-                TriviaQuestions = JsonConvert.DeserializeObject<TriviaQuestion[]>(File.ReadAllText(QUESTIONS_FILE));
-                PokemonMap = JsonConvert.DeserializeObject<PokemonNameId[]>(File.ReadAllText(POKEMON_MAP_PATH))
-                                        ?.ToDictionary(x => x.Id, x => x.Name)
-                             ?? new();
-            }
-            catch (Exception ex)
-            {
-                Log.Error(ex, "Error loading local data");
-                throw;
-            }
-        }
-    }
-
-    private T Get<T>(string key)
-        where T : class
-        => JsonConvert.DeserializeObject<T>(_con.GetDatabase().StringGet($"{_creds.RedisKey()}_localdata_{key}"));
-
-    private void Set(string key, object obj)
-        => _con.GetDatabase().StringSet($"{_creds.RedisKey()}_localdata_{key}", JsonConvert.SerializeObject(obj));
-}

src/NadekoBot/Services/strings/impl/MemoryBotStringsProvider.cs

@@ -1,13 +1,13 @@
 #nullable disable
 namespace NadekoBot.Services;
 
-public class LocalBotStringsProvider : IBotStringsProvider
+public class MemoryBotStringsProvider : IBotStringsProvider
 {
     private readonly IStringsSource _source;
     private IReadOnlyDictionary<string, Dictionary<string, string>> responseStrings;
     private IReadOnlyDictionary<string, Dictionary<string, CommandStrings>> commandStrings;
 
-    public LocalBotStringsProvider(IStringsSource source)
+    public MemoryBotStringsProvider(IStringsSource source)
     {
         _source = source;
         Reload();

src/NadekoBot/_Extensions/ArrayExtensions.cs

@@ -32,7 +32,7 @@ public static class ArrayExtensions
     public static TOut[] Map<TIn, TOut>(this TIn[] arr, Func<TIn, TOut> f)
         => Array.ConvertAll(arr, x => f(x));
 
-    public static IReadOnlyCollection<TOut> Map<TIn, TOut>(this IReadOnlyCollection<TIn> col, Func<TIn, TOut> f)
+    public static TOut[] Map<TIn, TOut>(this IReadOnlyCollection<TIn> col, Func<TIn, TOut> f)
     {
         var toReturn = new TOut[col.Count];
         

src/NadekoBot/_Extensions/Extensions.cs

@@ -37,8 +37,9 @@ public static class Extensions
             _ => throw new ArgumentOutOfRangeException(nameof(text))
         };
 
-    public static List<ulong> GetGuildIds(this DiscordSocketClient client)
+    public static ulong[] GetGuildIds(this DiscordSocketClient client)
-        => client.Guilds.Select(x => x.Id).ToList();
+        => client.Guilds
+                 .Map(x => x.Id);
 
     /// <summary>
     ///     Generates a string in the format HHH:mm if timespan is &gt;= 2m.

src/NadekoBot/_Extensions/ServiceCollectionExtensions.cs

@@ -9,10 +9,10 @@ namespace NadekoBot.Extensions;
 
 public static class ServiceCollectionExtensions
 {
-    public static IServiceCollection AddBotStringsServices(this IServiceCollection services, int totalShards)
+    public static IServiceCollection AddBotStringsServices(this IServiceCollection services, BotCacheImplemenation botCache)
-        => totalShards <= 1
+        => botCache == BotCacheImplemenation.Memory
             ? services.AddSingleton<IStringsSource, LocalFileStringsSource>()
-                      .AddSingleton<IBotStringsProvider, LocalBotStringsProvider>()
+                      .AddSingleton<IBotStringsProvider, MemoryBotStringsProvider>()
                       .AddSingleton<IBotStrings, BotStrings>()
             : services.AddSingleton<IStringsSource, LocalFileStringsSource>()
                       .AddSingleton<IBotStringsProvider, RedisBotStringsProvider>()
@@ -24,17 +24,6 @@ public static class ServiceCollectionExtensions
                             .AddClasses(f => f.AssignableTo(typeof(ConfigServiceBase<>)))
                             .AsSelfWithInterfaces());
 
-        // var baseType = typeof(ConfigServiceBase<>);
-        //
-        // foreach (var type in Assembly.GetCallingAssembly().ExportedTypes.Where(x => x.IsSealed))
-        // {
-        //     if (type.BaseType?.IsGenericType == true && type.BaseType.GetGenericTypeDefinition() == baseType)
-        //     {
-        //         services.AddSingleton(type);
-        //         services.AddSingleton(x => (IConfigService)x.GetRequiredService(type));
-        //     }
-        // }
-
         return services;
     }
 
@@ -48,7 +37,7 @@ public static class ServiceCollectionExtensions
                    .AddSingleton<ISoundcloudResolver, SoundcloudResolver>()
                    .AddSingleton<ILocalTrackResolver, LocalTrackResolver>()
                    .AddSingleton<IRadioResolver, RadioResolver>()
-                   .AddSingleton<ITrackCacher, RedisTrackCacher>()
+                   .AddSingleton<ITrackCacher, TrackCacher>()
                    .AddSingleton<YtLoader>()
                    .AddSingleton<IPlaceholderProvider>(svc => svc.GetRequiredService<IMusicService>());
 
@@ -65,10 +54,23 @@ public static class ServiceCollectionExtensions
         return services;
     }
 
-    public static IServiceCollection AddRedis(this IServiceCollection services, string redisOptions)
+    public static IServiceCollection AddCache(this IServiceCollection services, IBotCredentials creds)
     {
-        var conf = ConfigurationOptions.Parse(redisOptions);
+        if (creds.BotCache == BotCacheImplemenation.Redis)
-        services.AddSingleton(ConnectionMultiplexer.Connect(conf));
+        {
-        return services;
+            var conf = ConfigurationOptions.Parse(creds.RedisOptions);
+            services.AddSingleton(ConnectionMultiplexer.Connect(conf))
+                    .AddSingleton<IBotCache, RedisBotCache>()
+                    .AddSingleton<IPubSub, RedisPubSub>();
+        }
+        else
+        {
+            services.AddSingleton<IBotCache, MemoryBotCache>()
+                    .AddSingleton<IPubSub, EventPubSub>();
+
+        }
+
+        return services
+            .AddBotStringsServices(creds.BotCache);
     }
 }

src/NadekoBot/_Extensions/UserExtensions.cs

@@ -30,9 +30,9 @@ public static class UserExtensions
         => usr.AvatarId is null ? new(usr.GetDefaultAvatarUrl()) : new Uri(usr.GetAvatarUrl(ImageFormat.Auto, size));
 
     // This method is only used for the xp card
-    public static Uri? RealAvatarUrl(this DiscordUser usr)
+    public static Uri RealAvatarUrl(this DiscordUser usr)
         => usr.AvatarId is null
-            ? null
+            ? new(CDN.GetDefaultUserAvatarUrl(ushort.Parse(usr.Discriminator)))
             : new Uri(usr.AvatarId.StartsWith("a_", StringComparison.InvariantCulture)
                 ? $"{DiscordConfig.CDNUrl}avatars/{usr.UserId}/{usr.AvatarId}.gif"
                 : $"{DiscordConfig.CDNUrl}avatars/{usr.UserId}/{usr.AvatarId}.png");

src/NadekoBot/creds_example.yml

@@ -1,5 +1,5 @@
 # DO NOT CHANGE
-version: 5
+version: 6
 # Bot token. Do not share with anyone ever -> https://discordapp.com/developers/applications/
 token: ''
 # List of Ids of the users who have bot owner permissions
@@ -9,6 +9,9 @@ ownerIds: []
 usePrivilegedIntents: true
 # The number of shards that the bot will be running on.
 # Leave at 1 if you don't know what you're doing.
+# 
+# note: If you are planning to have more than one shard, then you must change botCache to 'redis'.
+# Also, in that case you should be using NadekoBot.Coordinator to start the bot, and it will correctly override this value.
 totalShards: 1
 # Login to https://console.cloud.google.com, create a new project, go to APIs & Services -> Library -> YouTube Data API and enable it.
 # Then, go to APIs and Services -> Credentials and click Create credentials -> API key.
@@ -53,7 +56,12 @@ patreon:
 botListToken: ''
 # Official cleverbot api key.
 cleverbotApiKey: ''
+# Which cache implementation should bot use.
+# 'memory' - Cache will be in memory of the bot's process itself. Only use this on bots with a single shard. When the bot is restarted the cache is reset.
+# 'redis' - Uses redis (which needs to be separately downloaded and installed). The cache will persist through bot restarts. You can configure connection string in creds.yml
+botCache: Memory
 # Redis connection string. Don't change if you don't know what you're doing.
+# Only used if botCache is set to 'redis'
 redisOptions: localhost:6379,syncTimeout=30000,responseTimeout=30000,allowAdmin=true,password=
 # Database options. Don't change if you don't know what you're doing. Leave null for default values
 db:
@@ -99,7 +107,7 @@ twitchClientSecret:
 # args: "NadekoBot.dll -- {0}"
 # Windows default
 # cmd: NadekoBot.exe
-# args: {0}
+# args: "{0}"
 restartCommand:
   cmd: 
   args: 

src/NadekoBot/data/aliases.yml

@@ -862,8 +862,6 @@ unsetmusicchannel:
 musicquality:
 - musicquality
 - mquality
-imagesreload:
-- imagesreload
 stringsreload:
 - stringsreload
 shardstats:

src/NadekoBot/data/patron.yml

@@ -24,7 +24,7 @@ quotas:
   # Dictionary of commands with their respective quota data
   commands:
     cleverbot:
-      V: null
+      V: 
     prune:
       X:
         PerHour: 1

src/NadekoBot/data/strings/commands/commands.en-US.yml

@@ -1496,10 +1496,6 @@ musicquality:
     - ""
     - "High"
     - "Low"
-imagesreload:
-  desc: "Reloads images bot is using. Safe to use even when bot is being used heavily."
-  args:
-    - ""
 stringsreload:
   desc: "Reloads localized bot strings."
   args: