feat: replace Hangfire with Coravel

.gitignore

@@ -2,3 +2,4 @@ bin/
 obj/
 .version
 config.ini
+*.DotSettings.user

Foxnouns.Backend/Config.cs

@@ -14,7 +14,6 @@ public class Config
 
     public LoggingConfig Logging { get; init; } = new();
     public DatabaseConfig Database { get; init; } = new();
-    public JobsConfig Jobs { get; init; } = new();
     public StorageConfig Storage { get; init; } = new();
     public DiscordAuthConfig DiscordAuth { get; init; } = new();
     public GoogleAuthConfig GoogleAuth { get; init; } = new();
@@ -38,12 +37,6 @@ public class Config
         public int? MaxPoolSize { get; init; }
     }
 
-    public class JobsConfig
-    {
-        public string Redis { get; init; } = string.Empty;
-        public int Workers { get; init; } = 5;
-    }
-
     public class StorageConfig
     {
         public string Endpoint { get; init; } = string.Empty;

Foxnouns.Backend/Controllers/Authentication/AuthController.cs

@@ -19,7 +19,7 @@ public class AuthController(Config config, KeyCacheService keyCacheSvc, ILogger
             config.TumblrAuth.Enabled);
         var state = HttpUtility.UrlEncode(await keyCacheSvc.GenerateAuthStateAsync());
         string? discord = null;
-        if (config.DiscordAuth.ClientId != null && config.DiscordAuth.ClientSecret != null)
+        if (config.DiscordAuth is { ClientId: not null, ClientSecret: not null })
             discord =
                 $"https://discord.com/oauth2/authorize?response_type=code" +
                 $"&client_id={config.DiscordAuth.ClientId}&scope=identify" +

Foxnouns.Backend/Controllers/MembersController.cs

@@ -1,6 +1,8 @@
+using Coravel.Queuing.Interfaces;
 using EntityFramework.Exceptions.Common;
 using Foxnouns.Backend.Database;
 using Foxnouns.Backend.Database.Models;
+using Foxnouns.Backend.Extensions;
 using Foxnouns.Backend.Jobs;
 using Foxnouns.Backend.Middleware;
 using Foxnouns.Backend.Services;
@@ -16,7 +18,8 @@ public class MembersController(
     DatabaseContext db,
     MemberRendererService memberRendererService,
     ISnowflakeGenerator snowflakeGenerator,
-    AvatarUpdateJob avatarUpdate) : ApiControllerBase
+    ObjectStorageService objectStorage,
+    IQueue queue) : ApiControllerBase
 {
     private readonly ILogger _logger = logger.ForContext<MembersController>();
 
@@ -76,7 +79,9 @@ public class MembersController(
             throw new ApiError.BadRequest("A member with that name already exists", "name", req.Name);
         }
 
-        if (req.Avatar != null) AvatarUpdateJob.QueueUpdateMemberAvatar(member.Id, req.Avatar);
+        if (req.Avatar != null)
+            queue.QueueInvocableWithPayload<MemberAvatarUpdateInvocable, AvatarUpdatePayload>(
+                new AvatarUpdatePayload(member.Id, req.Avatar));
 
         return Ok(memberRendererService.RenderMember(member, CurrentToken));
     }
@@ -96,7 +101,7 @@ public class MembersController(
 
         await db.SaveChangesAsync();
 
-        if (member.Avatar != null) await avatarUpdate.DeleteMemberAvatar(member.Id, member.Avatar);
+        if (member.Avatar != null) await objectStorage.DeleteMemberAvatarAsync(member.Id, member.Avatar);
         return NoContent();
     }
 

Foxnouns.Backend/Controllers/UsersController.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics.CodeAnalysis;
+using Coravel.Queuing.Interfaces;
 using Foxnouns.Backend.Database;
 using Foxnouns.Backend.Database.Models;
 using Foxnouns.Backend.Jobs;
@@ -14,7 +15,8 @@ namespace Foxnouns.Backend.Controllers;
 public class UsersController(
     DatabaseContext db,
     UserRendererService userRendererService,
-    ISnowflakeGenerator snowflakeGenerator) : ApiControllerBase
+    ISnowflakeGenerator snowflakeGenerator,
+    IQueue queue) : ApiControllerBase
 {
     [HttpGet("{userRef}")]
     [ProducesResponseType<UserRendererService.UserResponse>(statusCode: StatusCodes.Status200OK)]
@@ -70,7 +72,8 @@ public class UsersController(
         // (atomic operations are hard when combined with background jobs)
         // so it's in a separate block to the validation above.
         if (req.HasProperty(nameof(req.Avatar)))
-            AvatarUpdateJob.QueueUpdateUserAvatar(CurrentUser!.Id, req.Avatar);
+            queue.QueueInvocableWithPayload<UserAvatarUpdateInvocable, AvatarUpdatePayload>(
+                new AvatarUpdatePayload(CurrentUser!.Id, req.Avatar));
 
         await db.SaveChangesAsync();
         await tx.CommitAsync();

Foxnouns.Backend/Extensions/AvatarObjectExtensions.cs

@@ -0,0 +1,51 @@
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Jobs;
+using Foxnouns.Backend.Services;
+using Foxnouns.Backend.Utils;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Formats.Webp;
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Transforms;
+
+namespace Foxnouns.Backend.Extensions;
+
+public static class AvatarObjectExtensions
+{
+    private static readonly string[] ValidContentTypes = ["image/png", "image/webp", "image/jpeg"];
+
+    public static async Task
+        DeleteMemberAvatarAsync(this ObjectStorageService objectStorage, Snowflake id, string hash) =>
+        await objectStorage.RemoveObjectAsync(MemberAvatarUpdateInvocable.Path(id, hash));
+
+    public static async Task
+        DeleteUserAvatarAsync(this ObjectStorageService objectStorage, Snowflake id, string hash) =>
+        await objectStorage.RemoveObjectAsync(UserAvatarUpdateInvocable.Path(id, hash));
+
+    public static async Task<Stream> ConvertBase64UriToAvatar(this string uri)
+    {
+        if (!uri.StartsWith("data:image/"))
+            throw new ArgumentException("Not a data URI", nameof(uri));
+
+        var split = uri.Remove(0, "data:".Length).Split(";base64,");
+        var contentType = split[0];
+        var encoded = split[1];
+        if (!ValidContentTypes.Contains(contentType))
+            throw new ArgumentException("Invalid content type for image", nameof(uri));
+
+        if (!AuthUtils.TryFromBase64String(encoded, out var rawImage))
+            throw new ArgumentException("Invalid base64 string", nameof(uri));
+
+        var image = Image.Load(rawImage);
+
+        var processor = new ResizeProcessor(
+            new ResizeOptions { Size = new Size(512), Mode = ResizeMode.Crop, Position = AnchorPositionMode.Center },
+            image.Size
+        );
+
+        image.Mutate(x => x.ApplyProcessor(processor));
+
+        var stream = new MemoryStream(64 * 1024);
+        await image.SaveAsync(stream, new WebpEncoder { Quality = 95, NearLossless = false });
+        return stream;
+    }
+}

Foxnouns.Backend/Extensions/WebApplicationExtensions.cs

@@ -1,6 +1,8 @@
 using App.Metrics;
 using App.Metrics.AspNetCore;
 using App.Metrics.Formatters.Prometheus;
+using Coravel;
+using Coravel.Queuing.Interfaces;
 using Foxnouns.Backend.Database;
 using Foxnouns.Backend.Jobs;
 using Foxnouns.Backend.Middleware;
@@ -93,6 +95,7 @@ public static class WebApplicationExtensions
 
         return builder
             .SetBasePath(Directory.GetCurrentDirectory())
+            .AddJsonFile("appSettings.json", true)
             .AddIniFile(file, optional: false, reloadOnChange: true)
             .AddEnvironmentVariables();
     }
@@ -105,8 +108,10 @@ public static class WebApplicationExtensions
         .AddScoped<AuthService>()
         .AddScoped<KeyCacheService>()
         .AddScoped<RemoteAuthService>()
-        // Background job classes
+        .AddScoped<ObjectStorageService>()
-        .AddTransient<AvatarUpdateJob>();
+        // Transient jobs
+        .AddTransient<MemberAvatarUpdateInvocable>()
+        .AddTransient<UserAvatarUpdateInvocable>();
 
     public static IServiceCollection AddCustomMiddleware(this IServiceCollection services) => services
         .AddScoped<ErrorHandlerMiddleware>()
@@ -122,6 +127,8 @@ public static class WebApplicationExtensions
     {
         await BuildInfo.ReadBuildInfo();
 
+        app.Services.ConfigureQueue().LogQueuedTaskProgress(app.Services.GetRequiredService<ILogger<IQueue>>());
+
         await using var scope = app.Services.CreateAsyncScope();
         var logger = scope.ServiceProvider.GetRequiredService<ILogger>().ForContext<WebApplication>();
         var db = scope.ServiceProvider.GetRequiredService<DatabaseContext>();

Foxnouns.Backend/Foxnouns.Backend.csproj

@@ -9,11 +9,9 @@
         <PackageReference Include="App.Metrics" Version="4.3.0" />
         <PackageReference Include="App.Metrics.AspNetCore.All" Version="4.3.0" />
         <PackageReference Include="App.Metrics.Prometheus" Version="4.3.0" />
+        <PackageReference Include="Coravel" Version="5.0.4" />
         <PackageReference Include="EFCore.NamingConventions" Version="8.0.3"/>
         <PackageReference Include="EntityFrameworkCore.Exceptions.PostgreSQL" Version="8.1.2" />
-        <PackageReference Include="Hangfire.AspNetCore" Version="1.8.14" />
-        <PackageReference Include="Hangfire.Core" Version="1.8.14" />
-        <PackageReference Include="Hangfire.Redis.StackExchange" Version="1.9.3" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="8.0.7" />
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.7" />
         <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.7" />
@@ -28,7 +26,6 @@
         <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime" Version="8.0.4"/>
         <PackageReference Include="Npgsql.Json.NET" Version="8.0.3" />
         <PackageReference Include="Sentry.AspNetCore" Version="4.9.0" />
-        <PackageReference Include="Sentry.Hangfire" Version="4.9.0" />
         <PackageReference Include="Serilog" Version="4.0.1" />
         <PackageReference Include="Serilog.AspNetCore" Version="8.0.1"/>
         <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />

Foxnouns.Backend/Jobs/AvatarUpdateJob.cs

@@ -1,220 +0,0 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Security.Cryptography;
-using Foxnouns.Backend.Database;
-using Foxnouns.Backend.Utils;
-using Hangfire;
-using Minio;
-using Minio.DataModel.Args;
-using Minio.Exceptions;
-using SixLabors.ImageSharp;
-using SixLabors.ImageSharp.Formats.Webp;
-using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Processing.Processors.Transforms;
-
-namespace Foxnouns.Backend.Jobs;
-
-[SuppressMessage("ReSharper", "MemberCanBePrivate.Global", Justification = "Hangfire jobs need to be public")]
-public class AvatarUpdateJob(DatabaseContext db, IMinioClient minio, Config config, ILogger logger)
-{
-    private readonly string[] _validContentTypes = ["image/png", "image/webp", "image/jpeg"];
-
-    public static void QueueUpdateUserAvatar(Snowflake id, string? newAvatar)
-    {
-        if (newAvatar != null)
-            BackgroundJob.Enqueue<AvatarUpdateJob>(job => job.UpdateUserAvatar(id, newAvatar));
-        else
-            BackgroundJob.Enqueue<AvatarUpdateJob>(job => job.ClearUserAvatar(id));
-    }
-
-    public static void QueueUpdateMemberAvatar(Snowflake id, string? newAvatar)
-    {
-        if (newAvatar != null)
-            BackgroundJob.Enqueue<AvatarUpdateJob>(job => job.UpdateMemberAvatar(id, newAvatar));
-        else
-            BackgroundJob.Enqueue<AvatarUpdateJob>(job => job.ClearMemberAvatar(id));
-    }
-
-    public async Task UpdateUserAvatar(Snowflake id, string newAvatar)
-    {
-        var user = await db.Users.FindAsync(id);
-        if (user == null)
-        {
-            logger.Warning("Update avatar job queued for {UserId} but no user with that ID exists", id);
-            return;
-        }
-
-        try
-        {
-            var image = await ConvertAvatar(newAvatar);
-            var hash = Convert.ToHexString(await SHA256.HashDataAsync(image)).ToLower();
-            image.Seek(0, SeekOrigin.Begin);
-            var prevHash = user.Avatar;
-
-            await minio.PutObjectAsync(new PutObjectArgs()
-                .WithBucket(config.Storage.Bucket)
-                .WithObject(UserAvatarPath(id, hash))
-                .WithObjectSize(image.Length)
-                .WithStreamData(image)
-                .WithContentType("image/webp")
-            );
-
-            user.Avatar = hash;
-            await db.SaveChangesAsync();
-
-            if (prevHash != null && prevHash != hash)
-                await minio.RemoveObjectAsync(new RemoveObjectArgs()
-                    .WithBucket(config.Storage.Bucket)
-                    .WithObject(UserAvatarPath(id, prevHash))
-                );
-
-            logger.Information("Updated avatar for user {UserId}", id);
-        }
-        catch (ArgumentException ae)
-        {
-            logger.Warning("Invalid data URI for new avatar for user {UserId}: {Reason}", id, ae.Message);
-        }
-    }
-
-    public async Task ClearUserAvatar(Snowflake id)
-    {
-        var user = await db.Users.FindAsync(id);
-        if (user == null)
-        {
-            logger.Warning("Clear avatar job queued for {UserId} but no user with that ID exists", id);
-            return;
-        }
-
-        if (user.Avatar == null)
-        {
-            logger.Warning("Clear avatar job queued for {UserId} with null avatar", id);
-            return;
-        }
-
-        await minio.RemoveObjectAsync(new RemoveObjectArgs()
-            .WithBucket(config.Storage.Bucket)
-            .WithObject(UserAvatarPath(user.Id, user.Avatar))
-        );
-
-        user.Avatar = null;
-        await db.SaveChangesAsync();
-    }
-
-    public async Task UpdateMemberAvatar(Snowflake id, string newAvatar)
-    {
-        var member = await db.Members.FindAsync(id);
-        if (member == null)
-        {
-            logger.Warning("Update avatar job queued for {MemberId} but no member with that ID exists", id);
-            return;
-        }
-
-        try
-        {
-            var image = await ConvertAvatar(newAvatar);
-            var hash = Convert.ToHexString(await SHA256.HashDataAsync(image)).ToLower();
-            image.Seek(0, SeekOrigin.Begin);
-            var prevHash = member.Avatar;
-
-            await minio.PutObjectAsync(new PutObjectArgs()
-                .WithBucket(config.Storage.Bucket)
-                .WithObject(MemberAvatarPath(id, hash))
-                .WithObjectSize(image.Length)
-                .WithStreamData(image)
-                .WithContentType("image/webp")
-            );
-
-            member.Avatar = hash;
-            await db.SaveChangesAsync();
-
-            if (prevHash != null && prevHash != hash)
-                await minio.RemoveObjectAsync(new RemoveObjectArgs()
-                    .WithBucket(config.Storage.Bucket)
-                    .WithObject(MemberAvatarPath(id, prevHash))
-                );
-
-            logger.Information("Updated avatar for member {MemberId}", id);
-        }
-        catch (ArgumentException ae)
-        {
-            logger.Warning("Invalid data URI for new avatar for member {MemberId}: {Reason}", id, ae.Message);
-        }
-    }
-
-    public async Task ClearMemberAvatar(Snowflake id)
-    {
-        var member = await db.Members.FindAsync(id);
-        if (member == null)
-        {
-            logger.Warning("Clear avatar job queued for {MemberId} but no member with that ID exists", id);
-            return;
-        }
-
-        if (member.Avatar == null)
-        {
-            logger.Warning("Clear avatar job queued for {MemberId} with null avatar", id);
-            return;
-        }
-
-        await minio.RemoveObjectAsync(new RemoveObjectArgs()
-            .WithBucket(config.Storage.Bucket)
-            .WithObject(MemberAvatarPath(member.Id, member.Avatar))
-        );
-
-        member.Avatar = null;
-        await db.SaveChangesAsync();
-    }
-
-    /// <summary>
-    /// Deletes a member's avatar. This should only be used when a member is in the process of being deleted, otherwise,
-    /// <see cref="QueueUpdateMemberAvatar" /> with a <c>null</c> avatar should be used instead.
-    /// </summary>
-    public async Task DeleteMemberAvatar(Snowflake id, string hash) => await DeleteAvatar(MemberAvatarPath(id, hash));
-    /// <summary>
-    /// Deletes a user's avatar. This should only be used when a user is in the process of being deleted, otherwise,
-    /// <see cref="QueueUpdateUserAvatar" /> with a <c>null</c> avatar should be used instead.
-    /// </summary>
-    public async Task DeleteUserAvatar(Snowflake id, string hash) => await DeleteAvatar(UserAvatarPath(id, hash));
-
-    private async Task DeleteAvatar(string path)
-    {
-        logger.Debug("Deleting avatar at path {Path}", path);
-        try
-        {
-            await minio.RemoveObjectAsync(new RemoveObjectArgs().WithBucket(config.Storage.Bucket).WithObject(path));
-        }
-        catch (InvalidObjectNameException)
-        {
-        }
-    }
-
-    private async Task<Stream> ConvertAvatar(string uri)
-    {
-        if (!uri.StartsWith("data:image/"))
-            throw new ArgumentException("Not a data URI", nameof(uri));
-
-        var split = uri.Remove(0, "data:".Length).Split(";base64,");
-        var contentType = split[0];
-        var encoded = split[1];
-        if (!_validContentTypes.Contains(contentType))
-            throw new ArgumentException("Invalid content type for image", nameof(uri));
-
-        if (!AuthUtils.TryFromBase64String(encoded, out var rawImage))
-            throw new ArgumentException("Invalid base64 string", nameof(uri));
-
-        var image = Image.Load(rawImage);
-
-        var processor = new ResizeProcessor(
-            new ResizeOptions { Size = new Size(512), Mode = ResizeMode.Crop, Position = AnchorPositionMode.Center },
-            image.Size
-        );
-
-        image.Mutate(x => x.ApplyProcessor(processor));
-
-        var stream = new MemoryStream(64 * 1024);
-        await image.SaveAsync(stream, new WebpEncoder { Quality = 95, NearLossless = false });
-        return stream;
-    }
-
-    private static string UserAvatarPath(Snowflake id, string hash) => $"users/{id}/avatars/{hash}.webp";
-    private static string MemberAvatarPath(Snowflake id, string hash) => $"members/{id}/avatars/{hash}.webp";
-}

Foxnouns.Backend/Jobs/MemberAvatarUpdateInvocable.cs

@@ -0,0 +1,79 @@
+using System.Security.Cryptography;
+using Coravel.Invocable;
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Extensions;
+using Foxnouns.Backend.Services;
+
+namespace Foxnouns.Backend.Jobs;
+
+public class MemberAvatarUpdateInvocable(DatabaseContext db, ObjectStorageService objectStorage, ILogger logger)
+    : IInvocable, IInvocableWithPayload<AvatarUpdatePayload>
+{
+    private readonly ILogger _logger = logger.ForContext<UserAvatarUpdateInvocable>();
+    public required AvatarUpdatePayload Payload { get; set; }
+
+    public async Task Invoke()
+    {
+        if (Payload.NewAvatar != null) await UpdateMemberAvatarAsync(Payload.Id, Payload.NewAvatar);
+        else await ClearMemberAvatarAsync(Payload.Id);
+    }
+
+    private async Task UpdateMemberAvatarAsync(Snowflake id, string newAvatar)
+    {
+        _logger.Debug("Updating avatar for member {MemberId}", id);
+
+        var member = await db.Members.FindAsync(id);
+        if (member == null)
+        {
+            _logger.Warning("Update avatar job queued for {MemberId} but no member with that ID exists", id);
+            return;
+        }
+
+        try
+        {
+            var image = await newAvatar.ConvertBase64UriToAvatar();
+            var hash = Convert.ToHexString(await SHA256.HashDataAsync(image)).ToLower();
+            image.Seek(0, SeekOrigin.Begin);
+            var prevHash = member.Avatar;
+
+            await objectStorage.PutObjectAsync(Path(id, hash), image, "image/webp");
+
+            member.Avatar = hash;
+            await db.SaveChangesAsync();
+
+            if (prevHash != null && prevHash != hash)
+                await objectStorage.RemoveObjectAsync(Path(id, prevHash));
+
+            _logger.Information("Updated avatar for member {MemberId}", id);
+        }
+        catch (ArgumentException ae)
+        {
+            _logger.Warning("Invalid data URI for new avatar for member {MemberId}: {Reason}", id, ae.Message);
+        }
+    }
+
+    private async Task ClearMemberAvatarAsync(Snowflake id)
+    {
+        _logger.Debug("Clearing avatar for member {MemberId}", id);
+
+        var member = await db.Members.FindAsync(id);
+        if (member == null)
+        {
+            _logger.Warning("Clear avatar job queued for {MemberId} but no member with that ID exists", id);
+            return;
+        }
+
+        if (member.Avatar == null)
+        {
+            _logger.Warning("Clear avatar job queued for {MemberId} with null avatar", id);
+            return;
+        }
+
+        await objectStorage.RemoveObjectAsync(Path(member.Id, member.Avatar));
+
+        member.Avatar = null;
+        await db.SaveChangesAsync();
+    }
+
+    public static string Path(Snowflake id, string hash) => $"members/{id}/avatars/{hash}.webp";
+}

Foxnouns.Backend/Jobs/Payloads.cs

@@ -0,0 +1,5 @@
+using Foxnouns.Backend.Database;
+
+namespace Foxnouns.Backend.Jobs;
+
+public record AvatarUpdatePayload(Snowflake Id, string? NewAvatar);

Foxnouns.Backend/Jobs/UserAvatarUpdateInvocable.cs

@@ -0,0 +1,79 @@
+using System.Security.Cryptography;
+using Coravel.Invocable;
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Extensions;
+using Foxnouns.Backend.Services;
+
+namespace Foxnouns.Backend.Jobs;
+
+public class UserAvatarUpdateInvocable(DatabaseContext db, ObjectStorageService objectStorage, ILogger logger)
+    : IInvocable, IInvocableWithPayload<AvatarUpdatePayload>
+{
+    private readonly ILogger _logger = logger.ForContext<UserAvatarUpdateInvocable>();
+    public required AvatarUpdatePayload Payload { get; set; }
+
+    public async Task Invoke()
+    {
+        if (Payload.NewAvatar != null) await UpdateUserAvatarAsync(Payload.Id, Payload.NewAvatar);
+        else await ClearUserAvatarAsync(Payload.Id);
+    }
+
+    private async Task UpdateUserAvatarAsync(Snowflake id, string newAvatar)
+    {
+        _logger.Debug("Updating avatar for user {MemberId}", id);
+        
+        var user = await db.Users.FindAsync(id);
+        if (user == null)
+        {
+            _logger.Warning("Update avatar job queued for {UserId} but no user with that ID exists", id);
+            return;
+        }
+
+        try
+        {
+            var image = await newAvatar.ConvertBase64UriToAvatar();
+            var hash = Convert.ToHexString(await SHA256.HashDataAsync(image)).ToLower();
+            image.Seek(0, SeekOrigin.Begin);
+            var prevHash = user.Avatar;
+
+            await objectStorage.PutObjectAsync(Path(id, hash), image, "image/webp");
+
+            user.Avatar = hash;
+            await db.SaveChangesAsync();
+
+            if (prevHash != null && prevHash != hash)
+                await objectStorage.RemoveObjectAsync(Path(id, prevHash));
+
+            _logger.Information("Updated avatar for user {UserId}", id);
+        }
+        catch (ArgumentException ae)
+        {
+            _logger.Warning("Invalid data URI for new avatar for user {UserId}: {Reason}", id, ae.Message);
+        }
+    }
+
+    private async Task ClearUserAvatarAsync(Snowflake id)
+    {
+        _logger.Debug("Clearing avatar for user {MemberId}", id);
+        
+        var user = await db.Users.FindAsync(id);
+        if (user == null)
+        {
+            _logger.Warning("Clear avatar job queued for {UserId} but no user with that ID exists", id);
+            return;
+        }
+
+        if (user.Avatar == null)
+        {
+            _logger.Warning("Clear avatar job queued for {UserId} with null avatar", id);
+            return;
+        }
+
+        await objectStorage.RemoveObjectAsync(Path(user.Id, user.Avatar));
+
+        user.Avatar = null;
+        await db.SaveChangesAsync();
+    }
+
+    public static string Path(Snowflake id, string hash) => $"users/{id}/avatars/{hash}.webp";
+}

Foxnouns.Backend/Middleware/AuthenticationMiddleware.cs

@@ -2,7 +2,6 @@ using System.Security.Cryptography;
 using Foxnouns.Backend.Database;
 using Foxnouns.Backend.Database.Models;
 using Foxnouns.Backend.Utils;
-using Hangfire.Dashboard;
 using Microsoft.EntityFrameworkCore;
 using NodaTime;
 
@@ -64,33 +63,4 @@ public static class HttpContextExtensions
 }
 
 [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
-public class AuthenticateAttribute : Attribute;
+public class AuthenticateAttribute : Attribute;
-
-/// <summary>
-/// Authentication filter for the Hangfire dashboard. Uses the cookie created by the frontend
-/// (and otherwise only read <i>by</i> the frontend) to only allow admins to use it.
-/// </summary>
-public class HangfireDashboardAuthorizationFilter(IServiceProvider services) : IDashboardAsyncAuthorizationFilter
-{
-    public async Task<bool> AuthorizeAsync(DashboardContext context)
-    {
-        await using var scope = services.CreateAsyncScope();
-
-        await using var db = scope.ServiceProvider.GetRequiredService<DatabaseContext>();
-        var clock = scope.ServiceProvider.GetRequiredService<IClock>();
-
-        var httpContext = context.GetHttpContext();
-
-        if (!httpContext.Request.Cookies.TryGetValue("pronounscc-token", out var cookie)) return false;
-
-        if (!AuthUtils.TryFromBase64String(cookie!, out var rawToken)) return false;
-
-        var hash = SHA512.HashData(rawToken);
-        var oauthToken = await db.Tokens
-            .Include(t => t.Application)
-            .Include(t => t.User)
-            .FirstOrDefaultAsync(t => t.Hash == hash && t.ExpiresAt > clock.GetCurrentInstant() && !t.ManuallyExpired);
-
-        return oauthToken?.User.Role == UserRole.Admin;
-    }
-}

Foxnouns.Backend/Program.cs

@@ -1,18 +1,15 @@
+using Coravel;
 using Foxnouns.Backend;
 using Foxnouns.Backend.Database;
 using Serilog;
 using Foxnouns.Backend.Extensions;
-using Foxnouns.Backend.Middleware;
 using Foxnouns.Backend.Services;
 using Foxnouns.Backend.Utils;
-using Hangfire;
-using Hangfire.Redis.StackExchange;
 using Microsoft.AspNetCore.Mvc;
 using Minio;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using Sentry.Extensibility;
-using Sentry.Hangfire;
 
 // Read version information from .version in the repository root
 await BuildInfo.ReadBuildInfo();
@@ -64,6 +61,7 @@ JsonConvert.DefaultSettings = () => new JsonSerializerSettings
 };
 
 builder.Services
+    .AddQueue()
     .AddDbContext<DatabaseContext>()
     .AddCustomServices()
     .AddCustomMiddleware()
@@ -74,12 +72,6 @@ builder.Services
             .WithCredentials(config.Storage.AccessKey, config.Storage.SecretKey)
             .Build());
 
-builder.Services.AddHangfire(c => c.UseSentry().UseRedisStorage(config.Jobs.Redis, new RedisStorageOptions
-    {
-        Prefix = "foxnouns_"
-    }))
-    .AddHangfireServer(options => { options.WorkerCount = config.Jobs.Workers; });
-
 var app = builder.Build();
 
 await app.Initialize(args);
@@ -95,12 +87,6 @@ app.UseCors();
 app.UseCustomMiddleware();
 app.MapControllers();
 
-app.UseHangfireDashboard("/hangfire", new DashboardOptions
-{
-    AppPath = null,
-    AsyncAuthorization = [new HangfireDashboardAuthorizationFilter(app.Services)]
-});
-
 app.Urls.Clear();
 app.Urls.Add(config.Address);
 if (config.MetricsAddress != null) app.Urls.Add(config.MetricsAddress);

Foxnouns.Backend/Services/ObjectStorageService.cs

@@ -0,0 +1,33 @@
+using Minio;
+using Minio.DataModel.Args;
+using Minio.Exceptions;
+
+namespace Foxnouns.Backend.Services;
+
+public class ObjectStorageService(ILogger logger, Config config, IMinioClient minio)
+{
+    private readonly ILogger _logger = logger.ForContext<ObjectStorageService>();
+    
+    public async Task RemoveObjectAsync(string path)
+    {
+        logger.Debug("Deleting object at path {Path}", path);
+        try
+        {
+            await minio.RemoveObjectAsync(new RemoveObjectArgs().WithBucket(config.Storage.Bucket).WithObject(path));
+        }
+        catch (InvalidObjectNameException)
+        {
+        }
+    }
+
+    public async Task PutObjectAsync(string path, Stream data, string contentType)
+    {
+        await minio.PutObjectAsync(new PutObjectArgs()
+            .WithBucket(config.Storage.Bucket)
+            .WithObject(path)
+            .WithObjectSize(data.Length)
+            .WithStreamData(data)
+            .WithContentType(contentType)
+        );
+    }
+}

Foxnouns.Backend/Utils/Limits.cs

@@ -0,0 +1,9 @@
+namespace Foxnouns.Backend.Utils;
+
+public static class Limits
+{
+    public const int FieldLimit = 25;
+    public const int FieldNameLimit = 100;
+    public const int FieldEntryTextLimit = 100;
+    public const int FieldEntriesLimit = 100;
+}

Foxnouns.Backend/Utils/ValidationUtils.cs

@@ -57,11 +57,11 @@ public static class ValidationUtils
 
     public static ValidationError? ValidateMemberName(string memberName)
     {
-        if (!UsernameRegex.IsMatch(memberName))
+        if (!MemberRegex.IsMatch(memberName))
             return memberName.Length switch
             {
-                < 2 => ValidationError.LengthError("Name is too short", 1, 100, memberName.Length),
+                < 1 => ValidationError.LengthError("Name is too short", 1, 100, memberName.Length),
-                > 40 => ValidationError.LengthError("Name is too long", 1, 100, memberName.Length),
+                > 100 => ValidationError.LengthError("Name is too long", 1, 100, memberName.Length),
                 _ => ValidationError.GenericValidationError(
                     "Member name cannot contain any of the following: " +
                     " @, ?, !, #, /, \\, [, ], \", ', $, %, &, (, ), {, }, +, <, =, >, ^, |, ~, `, , " +
@@ -119,10 +119,7 @@ public static class ValidationUtils
         };
     }
 
-    private const int FieldLimit = 25;
+
-    private const int FieldNameLimit = 100;
-    private const int FieldEntryTextLimit = 100;
-    private const int FieldEntriesLimit = 100;
 
     private static readonly string[] DefaultStatusOptions =
     [
@@ -140,7 +137,7 @@ public static class ValidationUtils
 
         var errors = new List<(string, ValidationError?)>();
         if (fields.Count > 25)
-            errors.Add(("fields", ValidationError.LengthError("Too many fields", 0, FieldLimit, fields.Count)));
+            errors.Add(("fields", ValidationError.LengthError("Too many fields", 0, Limits.FieldLimit, fields.Count)));
         // No overwhelming this function, thank you
         if (fields.Count > 100) return errors;
 
@@ -148,13 +145,13 @@ public static class ValidationUtils
         {
             switch (field.Name.Length)
             {
-                case > FieldNameLimit:
+                case > Limits.FieldNameLimit:
                     errors.Add(($"fields.{index}.name",
-                        ValidationError.LengthError("Field name is too long", 1, FieldNameLimit, field.Name.Length)));
+                        ValidationError.LengthError("Field name is too long", 1, Limits.FieldNameLimit, field.Name.Length)));
                     break;
                 case < 1:
                     errors.Add(($"fields.{index}.name",
-                        ValidationError.LengthError("Field name is too short", 1, FieldNameLimit, field.Name.Length)));
+                        ValidationError.LengthError("Field name is too short", 1, Limits.FieldNameLimit, field.Name.Length)));
                     break;
             }
 
@@ -170,26 +167,26 @@ public static class ValidationUtils
         if (entries == null || entries.Length == 0) return [];
         var errors = new List<(string, ValidationError?)>();
 
-        if (entries.Length > FieldEntriesLimit)
+        if (entries.Length > Limits.FieldEntriesLimit)
             errors.Add(($"{errorPrefix}.entries",
-                ValidationError.LengthError("Field has too many entries", 0, FieldEntriesLimit,
+                ValidationError.LengthError("Field has too many entries", 0, Limits.FieldEntriesLimit,
                     entries.Length)));
 
         // Same as above, no overwhelming this function with a ridiculous amount of entries
-        if (entries.Length > FieldEntriesLimit + 50) return errors;
+        if (entries.Length > Limits.FieldEntriesLimit + 50) return errors;
 
         foreach (var (entry, entryIdx) in entries.Select((entry, entryIdx) => (entry, entryIdx)))
         {
             switch (entry.Value.Length)
             {
-                case > FieldEntryTextLimit:
+                case > Limits.FieldEntryTextLimit:
                     errors.Add(($"{errorPrefix}.entries.{entryIdx}.value",
-                        ValidationError.LengthError("Field value is too long", 1, FieldEntryTextLimit,
+                        ValidationError.LengthError("Field value is too long", 1, Limits.FieldEntryTextLimit,
                             entry.Value.Length)));
                     break;
                 case < 1:
                     errors.Add(($"{errorPrefix}.entries.{entryIdx}.value",
-                        ValidationError.LengthError("Field value is too short", 1, FieldEntryTextLimit,
+                        ValidationError.LengthError("Field value is too short", 1, Limits.FieldEntryTextLimit,
                             entry.Value.Length)));
                     break;
             }

Foxnouns.Backend/appSettings.json

@@ -0,0 +1,7 @@
+{
+  "Coravel": {
+    "Queue": {
+      "ConsummationDelay": 1
+    }
+  }
+}

Foxnouns.Backend/config.example.ini

@@ -31,12 +31,6 @@ Timeout = 5
 ; The maximum number of open connections. Defaults to 50.
 MaxPoolSize = 50
 
-[Jobs]
-; The connection string for the Redis server.
-Redis = localhost:6379
-; The number of workers to use for background jobs. Defaults to 5.
-Workers = 5
-
 [Storage]
 Endpoint = <s3EndpointHere>
 AccessKey = <s3AccessKey>