52 lines
2.0 KiB
C#
52 lines
2.0 KiB
C#
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using Zurnal.RemaDateBase.DateDao;
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public class GroupAttendanceService
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{
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public class AttendanceInfo
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{
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public int TotalStudents { get; set; }
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public int TotalLessons { get; set; }
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public double AttendancePercentage { get; set; }
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public List<StudentAttendance> StudentAttendances { get; set; }
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}
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public class StudentAttendance
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{
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public string FIO { get; set; }
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public int AttendedLessons { get; set; }
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public int MissedLessons { get; set; }
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public double AttendanceRate { get; set; }
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}
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public AttendanceInfo GetGroupAttendanceInfo(GroupDao group, List<PresnceDao> presences)
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{
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var students = group.Users.ToList();
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var totalLessons = presences.Select(p => p.LessonNumber).Distinct().Count();
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var totalStudents = students.Count;
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var studentAttendances = students.Select(student =>
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{
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var studentPresences = presences.Where(p => p.userDao.Guid == student.Guid).ToList();
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var attendedLessons = studentPresences.Count(p => p.IsAttendensy);
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var missedLessons = totalLessons - attendedLessons;
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var attendanceRate = totalLessons > 0 ? (double)attendedLessons / totalLessons * 100 : 0;
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return new StudentAttendance
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{
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FIO = student.FIO,
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AttendedLessons = attendedLessons,
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MissedLessons = missedLessons,
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AttendanceRate = attendanceRate
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};
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}).ToList();
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var attendancePercentage = totalStudents > 0 ? (double)studentAttendances.Sum(s => s.AttendedLessons) / (totalStudents * totalLessons) * 100 : 0;
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return new AttendanceInfo
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{
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TotalStudents = totalStudents,
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TotalLessons = totalLessons,
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AttendancePercentage = attendancePercentage,
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StudentAttendances = studentAttendances
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};
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}
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}
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