Cleanup offline streams

NostrStreamer/Services/BackgroundStreamManager.cs

@@ -25,6 +25,7 @@ public class BackgroundStreamManager : BackgroundService
 
                 var streamManager = scope.ServiceProvider.GetRequiredService<StreamManagerFactory>();
                 var db = scope.ServiceProvider.GetRequiredService<StreamerContext>();
+                var srs = scope.ServiceProvider.GetRequiredService<SrsApi>();
 
                 var liveStreams = await db.Streams
                     .AsNoTracking()
@@ -35,7 +36,15 @@ public class BackgroundStreamManager : BackgroundService
                 foreach (var id in liveStreams)
                 {
                     var manager = await streamManager.ForStream(id);
-                    await manager.UpdateViewers();
+                    var client = await srs.GetClient(manager.GetStream().ClientId);
+                    if (client != default)
+                    {
+                        await manager.UpdateViewers();
+                    }
+                    else
+                    {
+                        await manager.StreamStopped();
+                    }
                 }
             }
             catch (Exception ex)

NostrStreamer/Services/SrsApi.cs

@@ -18,10 +18,9 @@ public class SrsApi
         return rsp!.Streams;
     }
 
-    public async Task<Stream> GetStream(string id)
+    public async Task<Stream?> GetStream(string id)
     {
-        var rsp = await _client.GetFromJsonAsync<Stream>($"/api/v1/streams/{id}");
+        return await _client.GetFromJsonAsync<Stream>($"/api/v1/streams/{id}");
-        return rsp!;
     }
 
     public async Task<List<Client>> ListClients()
@@ -30,6 +29,12 @@ public class SrsApi
         return rsp!.Clients;
     }
 
+    public async Task<Client?> GetClient(string cid)
+    {
+        var rsp = await _client.GetFromJsonAsync<GetClientResponse>($"/api/v1/clients/{cid}");
+        return rsp?.Client;
+    }
+    
     public async Task KickClient(string clientId)
     {
         await _client.SendAsync(new HttpRequestMessage(HttpMethod.Delete, $"/api/v1/clients/{clientId}"));
@@ -192,3 +197,14 @@ public class ListClientsResponse
     public List<Client> Clients { get; set; }
 }
 
+public class GetClientResponse
+{
+    [JsonProperty("code")]
+    public int? Code { get; set; }
+
+    [JsonProperty("server")]
+    public string Server { get; set; }
+
+    [JsonProperty("client")]
+    public Client Client { get; set; }
+}