added extraction statistics

src/BirdsiteLive.Domain/Statistics/ExtractionStatisticsHandler.cs

@@ -0,0 +1,80 @@
+using System.Threading;
+using System.Timers;
+
+namespace BirdsiteLive.Domain.Statistics
+{
+    public interface IExtractionStatisticsHandler
+    {
+        void ExtractedDescription(int mentionsCount);
+        void ExtractedStatus(int mentionsCount);
+        ExtractionStatistics GetStatistics();
+    }
+    
+    public class ExtractionStatisticsHandler : IExtractionStatisticsHandler
+    {
+        private static int _lastDescriptionMentionsExtracted;
+        private static int _lastStatusMentionsExtracted;
+
+        private static int _descriptionMentionsExtracted;
+        private static int _statusMentionsExtracted;
+        
+        private static System.Timers.Timer _resetTimer;
+
+        #region Ctor
+        public ExtractionStatisticsHandler()
+        {
+            if (_resetTimer == null)
+            {
+                _resetTimer = new System.Timers.Timer();
+                _resetTimer.Elapsed += OnTimeResetEvent;
+                _resetTimer.Interval = 24 * 60 * 60 * 1000; // 24h
+                _resetTimer.Enabled = true;
+            }
+        }
+        #endregion
+
+        private void OnTimeResetEvent(object sender, ElapsedEventArgs e)
+        {
+            _lastDescriptionMentionsExtracted = _descriptionMentionsExtracted;
+            _lastStatusMentionsExtracted = _statusMentionsExtracted;
+
+            // Reset
+            Interlocked.Exchange(ref _descriptionMentionsExtracted, 0);
+            Interlocked.Exchange(ref _statusMentionsExtracted, 0);
+        }
+
+        public void ExtractedDescription(int mentionsCount)
+        {
+            Interlocked.Increment(ref _descriptionMentionsExtracted);
+        }
+
+        public void ExtractedStatus(int mentionsCount)
+        {
+            Interlocked.Increment(ref _statusMentionsExtracted);
+        }
+
+        public ExtractionStatistics GetStatistics()
+        {
+            return new ExtractionStatistics(_descriptionMentionsExtracted, _statusMentionsExtracted, _lastDescriptionMentionsExtracted, _lastStatusMentionsExtracted);
+        }
+    }
+
+    public class ExtractionStatistics
+    {
+        #region Ctor
+        public ExtractionStatistics(int mentionsInDescriptionsExtraction, int mentionsInStatusesExtraction, int lastMentionsInDescriptionsExtraction, int lastMentionsInStatusesExtraction)
+        {
+            MentionsInDescriptionsExtraction = mentionsInDescriptionsExtraction;
+            MentionsInStatusesExtraction = mentionsInStatusesExtraction;
+            LastMentionsInDescriptionsExtraction = lastMentionsInDescriptionsExtraction;
+            LastMentionsInStatusesExtraction = lastMentionsInStatusesExtraction;
+        }
+        #endregion
+
+        public int MentionsInDescriptionsExtraction { get; }
+        public int MentionsInStatusesExtraction { get; }
+
+        public int LastMentionsInDescriptionsExtraction { get; }
+        public int LastMentionsInStatusesExtraction { get; }
+    }
+}