first region implementation

SatelliteProvider.Services/RegionRequestQueue.cs

@@ -0,0 +1,39 @@
+using System.Threading.Channels;
+using SatelliteProvider.Common.DTO;
+using SatelliteProvider.Common.Interfaces;
+
+namespace SatelliteProvider.Services;
+
+public class RegionRequestQueue : IRegionRequestQueue
+{
+    private readonly Channel<RegionRequest> _queue;
+
+    public RegionRequestQueue(int capacity)
+    {
+        var options = new BoundedChannelOptions(capacity)
+        {
+            FullMode = BoundedChannelFullMode.Wait
+        };
+        _queue = Channel.CreateBounded<RegionRequest>(options);
+    }
+
+    public async ValueTask EnqueueAsync(RegionRequest request, CancellationToken cancellationToken = default)
+    {
+        await _queue.Writer.WriteAsync(request, cancellationToken);
+    }
+
+    public async ValueTask<RegionRequest?> DequeueAsync(CancellationToken cancellationToken = default)
+    {
+        if (await _queue.Reader.WaitToReadAsync(cancellationToken))
+        {
+            if (_queue.Reader.TryRead(out var request))
+            {
+                return request;
+            }
+        }
+        return null;
+    }
+
+    public int Count => _queue.Reader.Count;
+}
+