Initial implementation of voice works scanning.

JSMR.Infrastructure/Caching/ICacheObject.cs

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+using JSMR.Application.Common.Caching;
+using JSMR.Infrastructure.Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace JSMR.Infrastructure.Caching;
+
+public interface ICacheObject<T>
+{
+    Task<T> GetAsync(CancellationToken cancellationToken = default);
+    Task<T> RefreshAsync(CancellationToken cancellationToken = default);
+}
+
+public abstract class CacheObject<T>(ICache cache) : ICacheObject<T>
+{
+    protected abstract string Key { get; }
+    protected abstract Task<T> FetchAsync(CancellationToken cancellationToken = default);
+
+    protected virtual CacheEntryOptions Options => new() { SlidingExpiration = TimeSpan.FromHours(1) };
+
+    public async virtual Task<T> GetAsync(CancellationToken cancellationToken = default)
+    {
+        return await cache.GetAsync<T>(Key, cancellationToken) ?? await RefreshAsync(cancellationToken);
+    }
+
+    public async virtual Task<T> RefreshAsync(CancellationToken cancellationToken = default)
+    {
+        T cacheObject = await FetchAsync(cancellationToken);
+
+        await cache.SetAsync(Key, cacheObject, Options, cancellationToken);
+
+        return cacheObject;
+    }
+}
+
+public interface ISpamCircleCache : ICacheObject<string[]>
+{
+
+}
+
+public class SpamCircleCache(IDbContextFactory<AppDbContext> contextFactory, ICache cache) : CacheObject<string[]>(cache), ISpamCircleCache
+{
+    protected override string Key => "SpamCircles";
+
+    protected override async Task<string[]> FetchAsync(CancellationToken cancellationToken = default)
+    {
+        using var context = contextFactory.CreateDbContext();
+
+        return await context.Circles
+            .AsNoTracking()
+            .Where(circle => circle.Spam)
+            .Select(circle => circle.MakerId)
+            .Distinct()
+            .ToArrayAsync(cancellationToken);
+    }
+}