feat!: active users stats and improved logging and healthcheck

api/Services/IssueTrackingService.cs

@@ -0,0 +1,55 @@
+namespace BonchCalendar.Services;
+
+public class IssueTrackingService
+{
+	private bool _isLastFacultyFetchSuccessful = true;
+
+	private readonly List<string> _unsuccessfulGroupFetches = [];
+
+	private readonly List<string> _unsuccessfulTimetableFetches = [];
+
+	public void TrackFacultyFetch(bool isSuccessful) =>
+		_isLastFacultyFetchSuccessful = isSuccessful;
+
+	public void TrackGroupFetch(int facultyId, int course, bool isSuccessful)
+	{
+		string key = $"{facultyId}/{course}";
+
+		if (!isSuccessful)
+		{
+			if (!_unsuccessfulGroupFetches.Contains(key))
+				_unsuccessfulGroupFetches.Add(key);
+		}
+		else
+			_unsuccessfulGroupFetches.Remove(key);
+	}
+
+	public void TrackTimetableFetch(int facultyId, int groupId, bool isSuccessful)
+	{
+		string key = $"{facultyId}/{groupId}";
+
+		if (!isSuccessful)
+		{
+			if (!_unsuccessfulTimetableFetches.Contains(key))
+				_unsuccessfulTimetableFetches.Add(key);
+		}
+		else
+			_unsuccessfulTimetableFetches.Remove(key);
+	}
+
+	public Dictionary<string, object> GetReport()
+	{
+		Dictionary<string, object> report = [];
+
+		if (!_isLastFacultyFetchSuccessful)
+			report.Add("/faculties", false);
+
+		if (_unsuccessfulGroupFetches.Count > 0)
+			report.Add("/groups", _unsuccessfulGroupFetches);
+
+		if (_unsuccessfulTimetableFetches.Count > 0)
+			report.Add("/timetable", _unsuccessfulTimetableFetches);
+
+		return report;
+	}
+}