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NostrStreamer/Services/Background/BackgroundStreamManager.cs

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+using Microsoft.EntityFrameworkCore;
+using NostrStreamer.Database;
+using NostrStreamer.Services.StreamManager;
+
+namespace NostrStreamer.Services.Background;
+
+public class BackgroundStreamManager : BackgroundService
+{
+    private readonly ILogger<BackgroundStreamManager> _logger;
+    private readonly IServiceScopeFactory _scopeFactory;
+
+    public BackgroundStreamManager(ILogger<BackgroundStreamManager> logger, IServiceScopeFactory scopeFactory)
+    {
+        _logger = logger;
+        _scopeFactory = scopeFactory;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                using var scope = _scopeFactory.CreateScope();
+
+                var streamManager = scope.ServiceProvider.GetRequiredService<StreamManagerFactory>();
+                var db = scope.ServiceProvider.GetRequiredService<StreamerContext>();
+                var srs = scope.ServiceProvider.GetRequiredService<SrsApi>();
+
+                var recentlyEnded = DateTime.UtcNow.Subtract(TimeSpan.FromMinutes(5));
+                var liveStreams = await db.Streams
+                    .AsNoTracking()
+                    .Where(a => a.State == UserStreamState.Live || a.Ends > recentlyEnded)
+                    .Select(a => a.Id)
+                    .ToListAsync(cancellationToken: stoppingToken);
+
+                foreach (var id in liveStreams)
+                {
+                    var manager = await streamManager.ForStream(id);
+                    var client = await srs.GetStream(manager.GetStream().StreamId);
+                    if (client != default)
+                    {
+                        await manager.UpdateViewers();
+                    }
+                    else
+                    {
+                        await manager.StreamStopped();
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Failed to run");
+            }
+
+            await Task.Delay(TimeSpan.FromMinutes(1), stoppingToken);
+        }
+    }
+}