Add strike paywall (incomplete)

VoidCat/Services/InMemory/InMemoryPaywallStore.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Caching.Memory;
+using VoidCat.Model.Paywall;
+using VoidCat.Services.Abstractions;
+
+namespace VoidCat.Services.InMemory;
+
+public class InMemoryPaywallStore : IPaywallStore
+{
+    private readonly IMemoryCache _cache;
+
+    public InMemoryPaywallStore(IMemoryCache cache)
+    {
+        _cache = cache;
+    }
+
+    public ValueTask<PaywallConfig?> GetConfig(Guid id)
+    {
+        return ValueTask.FromResult(_cache.Get(id) as PaywallConfig);
+    }
+
+    public ValueTask SetConfig(Guid id, PaywallConfig config)
+    {
+        _cache.Set(id, config);
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask<PaywallOrder?> GetOrder(Guid id)
+    {
+        return ValueTask.FromResult(_cache.Get(id) as PaywallOrder);
+    }
+
+    public ValueTask SaveOrder(PaywallOrder order)
+    {
+        _cache.Set(order.Id, order);
+        return ValueTask.CompletedTask;
+    }
+}

VoidCat/Services/InMemory/InMemoryStatsController.cs

@@ -0,0 +1,52 @@
+using Microsoft.Extensions.Caching.Memory;
+using VoidCat.Services.Abstractions;
+
+namespace VoidCat.Services.InMemory;
+
+public class InMemoryStatsController : IStatsCollector, IStatsReporter
+{
+    private static readonly Guid Global = new Guid("{A98DFDCC-C4E1-4D42-B818-912086FC6157}");
+    private readonly IMemoryCache _cache;
+
+    public InMemoryStatsController(IMemoryCache cache)
+    {
+        _cache = cache;
+    }
+
+    public ValueTask TrackIngress(Guid id, ulong amount)
+    {
+        Incr(IngressKey(id), amount);
+        Incr(IngressKey(Global), amount);
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask TrackEgress(Guid id, ulong amount)
+    {
+        Incr(EgressKey(id), amount);
+        Incr(EgressKey(Global), amount);
+        return ValueTask.CompletedTask;
+    }
+
+    public ValueTask<Bandwidth> GetBandwidth()
+        => ValueTask.FromResult(GetBandwidthInternal(Global));
+
+    public ValueTask<Bandwidth> GetBandwidth(Guid id)
+        => ValueTask.FromResult(GetBandwidthInternal(id));
+
+    private Bandwidth GetBandwidthInternal(Guid id)
+    {
+        var i = _cache.Get(IngressKey(id)) as ulong?;
+        var o = _cache.Get(EgressKey(id)) as ulong?;
+        return new(i ?? 0UL, o ?? 0UL);
+    }
+
+    private void Incr(string k, ulong amount)
+    {
+        ulong v;
+        _cache.TryGetValue(k, out v);
+        _cache.Set(k, v + amount);
+    }
+
+    private string IngressKey(Guid id) => $"stats:ingress:{id}";
+    private string EgressKey(Guid id) => $"stats:egress:{id}";
+}